To see the other types of publications on this topic, follow the link: Coral reefs and islands – Barbados.
Journal articles on the topic 'Coral reefs and islands – Barbados'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Coral reefs and islands – Barbados.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Oxenford, Hazel A., and Henri Vallès. "Transient turbid water mass reduces temperature-induced coral bleaching and mortality in Barbados." PeerJ 4 (June 14, 2016): e2118. http://dx.doi.org/10.7717/peerj.2118.
Full textAbstract:
Global warming is seen as one of the greatest threats to the world's coral reefs, and with the continued rise in sea surface temperature predicted into the future, there is a great need for further understanding of how to prevent and address the damaging impacts. This is particularly so for countries whose economies depend heavily on healthy reefs, such as those of the eastern Caribbean. Here, we compare the severity of bleaching and mortality for five dominant coral species at six representative reef sites in Barbados during the two most significant warm-water events ever recorded in the eastern Caribbean, i.e., 2005 and 2010, and describe prevailing island-scale sea water conditions during both events. In so doing, we demonstrate that coral bleaching and subsequent mortality were considerably lower in 2010 than in 2005 for all species, irrespective of site, even though the anomalously warm water temperature profiles were very similar between years. We also show that during the 2010 event, Barbados was engulfed by a transient dark green turbid water mass of riverine origin coming from South America. We suggest that reduced exposure to high solar radiation associated with this transient water mass was the primary contributing factor to the lower bleaching and mortality observed in all corals. We conclude that monitoring these episodic mesoscale oceanographic features might improve risk assessments of southeastern Caribbean reefs to warm-water events in the future.
2
Muhs, Daniel R., Charles A. Bush, Kathleen C. Stewart, Tracy R. Rowland, and Russell C. Crittenden. "Geochemical Evidence of Saharan Dust Parent Material for Soils Developed on Quaternary Limestones of Caribbean and Western Atlantic Islands." Quaternary Research 33, no. 2 (March 1990): 157–77. http://dx.doi.org/10.1016/0033-5894(90)90016-e.
Full textAbstract:
AbstractMost previous workers have regarded the insoluble residues of high-purity Quaternary limestones (coral reefs and oolites) as the most important parent material for well-developed, clay-rich soils on Caribbean and western Atlantic islands, but this genetic mechanism requires unreasonable amounts of limestone solution in Quaternary time. Other possible parent materials from external sources are volcanic ash from the Lesser Antilles island arc and Saharan dust carried across the Atlantic Ocean on the northeast trade winds. Soils on Quaternary coral terraces and carbonate eolianites on Barbados, Jamaica, the Florida Keys (United States), and New Providence Island (Bahamas) were studied to determine which, if either, external source was important. Caribbean volcanic ashes and Saharan dust can be clearly distinguished using ratios of relatively immobile elements (Al2O3/TiO2, Ti/Y, Ti/Zr, and Ti/Th). Comparison of these ratios in 25 soils, where estimated ages range from 125,000 to about 870,000 yr, shows that Saharan dust is the most important parent material for soils on all islands. These results indicate that the northeast trade winds have been an important component of the regional climatology for much of the Quaterary. Saharan dust may also be an important parent material for Caribbean island bauxites of much greater age.
3
Puspitaningtyas, Indrie Hapsari, Siti Rudiyanti, and Bambang Sulardiono. "ASPEK REPRODUKSI BULU BABI (Sea Urchin) DI PERAIRAN PULAU MENJANGAN KECIL, KEPULAUAN KARIMUNJAWA, JEPARA (Aspects Reproduction of Sea Urchin in the Waters of Menjangan Kecil Island, Karimunjawa Islands, Jepara)." Management of Aquatic Resources Journal (MAQUARES) 6, no. 4 (July 25, 2018): 564–71. http://dx.doi.org/10.14710/marj.v6i4.21349.
Full textAbstract:
Gugusan terumbu karang yang terdapat di Kepulauan Karimunjawa termasuk ke dalam gugusan terumbu karang tepi dengan kisaran penutupan karang keras antara 6,7% - 68,9% dan indeks keragaman berkisar antara 0,43 - 0,91. Salah satu biota yang berasosiasi di ekosistem terumbu karang adalah bulu babi, yang merupakan biota filum echinodermata yang tersebar dari daerah intertidal dangkal hingga ke laut dalam. Gonad bulu babi di pasaran dikenal sebagai uni atau roe merupakan makanan populer dan salah satu komoditi utama di beberapa negara seperti Amerika Serikat, Kanada, Chili, Rusia, Prancis, Barbados dan Jepang. Penangkapan hingga overfishing menjadi masalah utama di berbagai negara, yang akan mengakibatkan penurunan jumlah populasi bulu babi di perairan. Penelitian ini dilakukan di Pulau Menjangan Kecil, Karimunjawa pada bulan Mei 2017. Tujuan dari penelitian ini adalah mengetahui aspek reproduksi bulu babi melalui nilai IKG, nilai TKG, dan Fekunditas Bulu Babi di Pulau Menjangan Kecil. Penelitian ini dilakukan dalam dua tahap yaitu, tahap sampling lapangan yang terdiri dari pengambilan sampel bulu babi, dengan metode acak menggunakan kuadran transek, dan pengukuran kualitas perairan. Tahap analisis laboratorium yang terdiri dari analisis Indeks Kematangan Gonad, Tingkat Kematangan Gonad, dan Fekunditas. Penelitian ini ada dua spesies yang ditemukan di lokasi sampling yaitu Diadema setosum dan Echinothrix calamaris. Hasil yang diperoleh untuk bulu babi jenis Diadema setosum nilai IKG berkisar antara 1,66% - 4,26% dan fekunditas berkisar antara 641 butir – 1.087 butir dan bulu babi jenis Echinothrix calamaris nilai IKG berkisar antara 5,32% - 7,54% dan fekunditas berkisar antara 1.159 butir – 2.192 butir, sedangkan nilai TKG kedua jenis bulu babi berada pada fase 5 (lima) yaitu tahap memijah. The coral reefs found in the Karimunjawa Islands are included in the cluster of coral reefs with hard coral cover ranges between 6.7% - 68.9% and the diversity index ranges from 0.43 to 0.91. One of the associated biota in the coral reef ecosystem is the sea urchin, which is an echinodermata physiological biota scattered from the shallow intertidal region to the deep sea. The sea urchin gonad on the market is known as uni or roe is a popular food and one of the main commodities in some countries such as USA, Canada, Chile, Russia, France, Barbados and Japan. Overfishing is a major problem in many countries, which will lead to a decrease in the number of sea urchin populations. This research was conducted in Menjangan Kecil Island, Karimunjawa in May 2017. The purpose of this research is to know the reproductive aspect of the sea urchin through IKG value, TKG value, and Fecundity of sea urchin on Menjangan Kecil Island. This research was conducted in two stages, field sampling stage consisting of sampling of sea urchins, by random method using transect quadrant, and measurement of water quality. Phase of laboratory analysis consisting of Gonad Maturity Index analysis, Gonad Maturity Level, and Fecundity. The study used only two species found at the sampling site is Diadema setosum and Echinothrix calamaris. The results obtained for Diadema setosum type IKG ranged from 1.66% - 4.26% and fecundity ranged from 641 grains - 1.087 grains and Echinothrix calamaris type IKG in the range of 5.32% - 7.54% and fecundity ranges from 1,159 grains - 2,192 grains, while the TKG value of both types of sea urchins is in phase 5 (five) or spawning phase.
4
Johnson, Robert G. "The role of the formation and destruction of the Hudson Strait glacial ice dam in changes of climate and sea level during the Last Interglacial-Glacial transition." JOURNAL OF ADVANCES IN NATURAL SCIENCES 8 (June 30, 2021): 12–23. http://dx.doi.org/10.24297/jns.v8i.9055.
Full textAbstract:
During the Last interglacial period of constant sea level, large coral reefs formed on the tectonically rising island of Barbados, and a broad lagoon with a small barrier reef formed at the Cane Vale site. The constant sea level was ended by a rapid glaciation, causing a fall of world sea level of 2.4 m, as measured by surveys of features associated with breaking waves on Barbados. The fall began about 120 ka BP, and lasted roughly 400 years, according to a lake pollen record from western Europe. That rapid fall was terminated at a wave-cut step on Barbados and with a quite small reversal in falling sea level. The rise was caused by rapid melting of the marine-based Barents Sea ice dome and other ice masses, due to a restored strong Atlantic Meridional Overturning Circulation (AMOC) flow. The sea level fall then resumed until it was halted at a wave-cut step at a world sea level 12.3 m below the last interglacial level, as recorded at the University of the West Indies site on Barbados. Following the erosion of that second step, a zonal northern North Atlantic circulation prevailed, causing a glacial ice-volume decrease and rise in sea level of 3.8 m. These two sea level fall reversals were caused respectively by the formation and destruction of a Hudson Strait ice dam and the resulting increase and much later decrease in the rate of AMOC flow.
5
Ku, Teh-Lung, M. Ivanovich, and Shangde Luo. "U-Series Dating of Last Interglacial High Sea Stands: Barbados Revisited." Quaternary Research 33, no. 2 (March 1990): 129–47. http://dx.doi.org/10.1016/0033-5894(90)90014-c.
Full textAbstract:
AbstractU-series chronologies of the emerged coral limestone terraces on Barbados, West Indies, together with those of the terraces from New Guinea, have formed the basis for most late Pleistocene eustatic models. The so-called “Barbados sea level model” has been challenged in recent years, however. A major issue is whether during oxygen isotope stage 5e, when Rendezvous Hill reef complex on Barbados Island formed, the sea rose above the present position for one relatively brief period of <10,000 yr, or for two or more periods spanning approximately from 140,000 to 115,000 yr B.P. Evidence for the latter scenario has not come from initial studies of Barbados but from elsewhere; it is also inconclusive because of the dating uncertainties involved. We have carried out careful redeterminations of U-series ages on a suite of 29 Acropora palmata samples systematically collected from four of the lowest terraces on the island. Diagenetic disturbance may have caused the age spreads at some sampling outcrops. A model for the diagenetic exchange of uranium isotopes in coral samples with those in groundwater explains the anomalous 234U/238U ratios in samples with apparently unaltered mineralogy (aragonite) and trace element (Mg and Sr) chemistry. It shows that age dispersions of 5–10% can be engendered by a U exchange coefficient of the order of 10−6 yr−1. The lower-limit terrace ages, estimated from averaging the multiple measurements, are 81,000 ± 2000 yr (Worthing), 105,000 ± 1000 yr (Ventnor), 120,000 ± 2000 yr (Maxwell), and 117,000 ± 3000 yr (Rendezvous Hill). No evidence was found of previously inferred bipartite sea levels centering around 118,000 and 135,000 yr ago. This study documents the need of dating coral with the high precision/sensitivity mass-spectrometric techniques for future resolution of the temporal relationships among sea level changes, climate oscillations, and astronomical forcing—relationships originally addressed by the Barbados sea level model.
6
Stroddart, JA. "Coral populations Fringing Islands: Larval Connections." Marine and Freshwater Research 39, no. 1 (1988): 109. http://dx.doi.org/10.1071/mf9880109.
Full textAbstract:
The ubiquitous Indo-Pacific coral Pocillopora damicornis utilises two modes of larval dispersal; one operates over short distances and involves a brooded, asexually-produced, planula; the second acts over longer distances and involves a sexual propagule. When examined genetically, larval connections between definable populations were weaker between fringing reefs around an island than they were between patch reefs in an embayment of similar dimensions. Differing regimes of water circulation were inferred to explain this pattern. One implication for management is that populations on fringing reefs are more likely to contain singularities than those on patch reefs and will thus contribute more to the total genetic diversity within a species.
7
Raudina Sari, Pavita, Ratna Saraswati, and Adi Wibowo. "Spatial Temporal Analysis of Coral Reefs in Belitung Tourism Destination Islands." E3S Web of Conferences 73 (2018): 03024. http://dx.doi.org/10.1051/e3sconf/20187303024.
Full textAbstract:
One of the world’s most spectacular ecosystems in this world is the coral reef. In Indonesia, Bangka Belitung is one province which has beautiful coral reefs and has become one of the tourist attractions. However, there might be a loss of the coral reefs area that can be caused by natural factors and human activities. This study aims to analyze the distribution and the changing of coral reefs that occurred in the islands of tourist destination in Belitung Regency from 2005 to 2018 and to analyze its factors. Landsat satellite imageries used in this study are Landsat 5 TM, Landsat 7 ETM+, and Landsat 8 OLI/TIRS. The distribution of coral reefs will be determined by image data processing. Then, overlay methods are used to analyze the changes and its factors. Based on the analysis, in the year of 2005-2018, there are 3.93 km2 areas of coral reefs that have decreased. On the top of that, there are 1.34 km2 or about 34.04% of coral reefs areas have decreased that caused by non-natural factors. It can be concluded that the decreased of the coral reefs occurred in Belitung tourism destination islands, are still dominated by natural factors rather than a non-natural factor.
8
Lesmana, Dudi. "Coral Reef in SAP of Western Waigeo Island in Raja Ampat District." JURNAL MINA SAINS 4, no. 1 (September 11, 2018): 38. http://dx.doi.org/10.30997/jms.v4i1.1270.
Full textAbstract:
This study aims to identify the condition of coral reefs in SAP Western Waigeo Islands, Raja Ampat District. The value of coral cover in the SAP area of the Western Waigeo Islands is in the range of 0% to 60% with an average value of 25.02%. In general, the condition of coral reefs in SAP Western Waigeo Islands can be categorized as "medium". Keywords: coral reef, SAP of Western Waigeo Island, coral cover
9
Dixson, Danielle L., Geoffrey P. Jones, Philip L. Munday, Serge Planes, Morgan S. Pratchett, Maya Srinivasan, Craig Syms, and Simon R. Thorrold. "Coral reef fish smell leaves to find island homes." Proceedings of the Royal Society B: Biological Sciences 275, no. 1653 (August 26, 2008): 2831–39. http://dx.doi.org/10.1098/rspb.2008.0876.
Full textAbstract:
Recent studies have shown that some coral reef fish larvae return to natal reefs, while others disperse to distant reefs. However, the sensory mechanisms used to find settlement sites are poorly understood. One hypothesis is that larvae use olfactory cues to navigate home or find other suitable reef habitats. Here we show a strong association between the clownfish Amphiprion percula and coral reefs surrounding offshore islands in Papua New Guinea. Host anemones and A. percula are particularly abundant in shallow water beneath overhanging rainforest vegetation. A series of experiments were carried out using paired-choice flumes to evaluate the potential role of water-borne olfactory cues in finding islands. Recently settled A. percula exhibited strong preferences for: (i) water from reefs with islands over water from reefs without islands; (ii) water collected near islands over water collected offshore; and (iii) water treated with either anemones or leaves from rainforest vegetation. Laboratory reared-juveniles exhibited the same positive response to anemones and rainforest vegetation, suggesting that olfactory preferences are innate rather than learned. We hypothesize that A. percula use a suite of olfactory stimuli to locate vegetated islands, which may explain the high levels of self-recruitment on island reefs. This previously unrecognized link between coral reefs and island vegetation argues for the integrated management of these pristine tropical habitats.
10
Denley, Danielle, Anna Metaxas, and Robert Scheibling. "Subregional variation in cover and diversity of hard coral (Scleractinia) in the Western Province, Solomon Islands following an unprecedented global bleaching event." PLOS ONE 15, no. 11 (November 11, 2020): e0242153. http://dx.doi.org/10.1371/journal.pone.0242153.
Full textAbstract:
Coral reefs are critically important marine ecosystems that are threatened worldwide by cumulative impacts of global climate change and local stressors. The Solomon Islands comprise the southwestern boundary of the Coral Triangle, the global center of coral diversity located in the Indo-Pacific, and represent a bright spot of comparatively healthy coral reef ecosystems. However, reports on the status of coral reefs in the Solomon Islands are based on monitoring conducted at 5 stations in 2003–2004 and 2006–2007, with no information on how corals in this region have responded to more recent global bleaching events and other local stressors. In this study, we compare reef condition (substrate composition) and function (taxonomic and morphological diversity of hard corals) among 15 reefs surveyed in the Western Province, Solomon Islands that span a range of local disturbance and conservation histories. Overall, we found high cover of live hard coral (15–64%) and diverse coral assemblages despite an unprecedented 36-month global bleaching event in the three years leading up to our surveys in 2018. However, there was significant variation in coral cover and diversity across the 15 reefs surveyed, suggesting that impacts of global disturbance events are moderated at smaller scales by local anthropogenic factors (fisheries extraction, land-use impacts, marine management) and environmental (hydrodynamics) conditions. Our study provides evidence that relatively healthy reefs persist at some locations in the Solomon Islands and that local stewardship practices have the potential to impact reef condition at subregional scales. As coral reef conservation becomes increasingly urgent in the face of escalating cumulative threats, prioritising sites for management efforts is critical. Based on our findings and the high dependency of Solomon Islanders on coral reef ecosystem services, we advocate that the Western Province, Solomon Islands be considered of high conservation priority.
11
Attamimi, Nafil Rabbani, and Ratna Saraswati. "Spatial analysis of coral reefs and its degradation patterns in Bunaken National Park." E3S Web of Conferences 76 (2019): 01001. http://dx.doi.org/10.1051/e3sconf/20197601001.
Full textAbstract:
This article will analyze the spatial pattern as well as the degradation pattern of the coral reefs in the Bunaken National Park. Bunaken National Park is a marine national park located in the Province of North Sulawesi; the park was built as means of conservation as well as providing a region for tourism. The national park contains a different type of marine and land ecosystem, one of the many types of the ecosystem that are in the national park is coral reefs. Coral reefs in Bunaken National Park provides different kinds of function and benefits whether for the marine habitats that live around the ecosystem, as well as for the local people who live in the islands of the national park. Remote sensing could be used as a tool to identify the spatial pattern and the type of ecosystem that habits inside shallow sea water. The main issue with this method is that the research cannot be conduct directly to identify which type of ecosystem specifically (such as coral reefs, seagrass, etc.), as well as its condition. Therefore, data collecting is necessary to observe and identify the ecosystem and its condition specifically. This study uses satellite image from Landsat 8 OLI as the main secondary data to be processed. The satellite image will be processed by using an algorithm of shallow water analysis that was introduced by Lyzenga in 1981. Since data verification and data observation is needed for this study, the research observes the pattern of the different type of ecosystem and its condition that spreads around Bunaken National Park. The verification and observation process was done by GPS, there were 250 different samples from the data that were collected around the Bunaken National Park. The sample that was collected in the study area will be used to classify the satellite image that has been processed by shallow water algorithm, on which could identify: seagrass, bleached coral reefs, deceased coral reefs, and healthy coral reefs around the national park. The results of this study show the spatial pattern of the coral reefs is located usually around the islands in the Bunaken National Park. The results show that the coral reefs are mostly located around the islands in the National Park. The map results show that the healthy coral reefs are usually located in the outermost layer around the shallow water ecosystem. The bleached reefs are usually located in the middle section of the shallow water, between the healthy coral and the islands itself. Most of the reefs that died and bleached are in the southwest of Bunaken Island, and the northwest of Nain Island.
12
UTAMI, RISNITA TRI, NEVIATY P. ZAMANI, and HAWIS H. MADDUPPA. "Molecular identification, abundance and distribution of the coral-killing sponge Terpios hoshinota in Bengkulu and Seribu Islands, Indonesia." Biodiversitas Journal of Biological Diversity 19, no. 6 (October 9, 2018): 2238–46. http://dx.doi.org/10.13057/biodiv/d190632.
Full textAbstract:
Utami RT, Zamani NP, Madduppa HH. 2018. Molecular identification, abundance and distribution of the coral-killing sponge Terpios hoshinota in Bengkulu and Seribu Islands, Indonesia. Biodiversitas 19: 2238-2246. Coral killing sponge Terpios hoshinota is one of threats to coral reefs. The outbreaks of T. hoshinota has been reported in the Indo-Pacific region. However, the current distribution of this species in Western of Sumatera Island is unknown, compared to Seribu Islands. This study aimed to identify coral-killing sponge molecularly and to compare the distribution and abundance of T. hoshinota in Bengkulu (Western of Sumatera) and in Seribu Islands (Northern of Java Island) and to record the preferences of coral substrate of T. hoshinota. Coral reefs and T. hoshinota data were collected using underwater photo transect method with 0.5x0.5m2 quadrate transect. Coral reefs covered by T. hoshinota was analyzed by using Correspondence Analysis, while the determination of biophysical and chemical environment was analyzed by Principal Component Analysis. The identity of the sponge was T. hoshinota. T. hoshinota has been expanding in many reefs across Indonesia especially in Tikus Island and Belanda Island. The most prevalent coral genera in the Seribu Islands infected by T. hoshinota was Acropora while those in Bengkulu were Porites and Pocillopora. Pearson correlation between the live coral cover and T. hoshinota cover was revealed not significant, while T. hoshinota cover and orthophosphate was significant. This study suggests that orthophosphate may play a role invasion of T. hoshinota outbreaks.
13
Nurdin, N., K. Amri, A. R. Rasyid, D. A. T. Pulubuhu, N. Nurdin, and T. Komatsu. "CORAL REEFS ON INHABITED AND UNINHABITED SMALL ISLANDS, SPERMONDE ARCHIPELAGO, INDONESIA." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2021 (June 29, 2021): 609–16. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2021-609-2021.
Full textAbstract:
Abstract. The small islands in Indonesia is providing important ecosystem services. It is important to identify damages of a coral reef ecosystem and whether natural factors or anthropogenic factors are the main causes. Landsat images obtained with different sensors were analyzed for mapping coral reef on inhabited and uninhabited small islands, Spermonde archipelago, Indonesia. Overall accuracies of three habitats classification were 89.2% and 85.6%, respectively. They are live coral, dead coral and non-coral. Ground truth surveys were selected by using the unsupervised classification method The live coral in inhabited islands was slightly greater than in uninhabited. An increasing area of live coral was about 5.3 ha of the total area in 1990 per year while a decreasing of dead coral was 3.5 ha per year in inhabited islands. In uninhabited island, a decreasing speed of live coral habitat area was about 0.6 per year. During 29 years, a significant increase in the dead coral and decrease in live corals. It has been identified that the significant controlling factor for the disturbances in reef ecosystem is derived from natural and anthropogenic.
14
Dongeren, Ap van. "WAVES ON REEFS: HOW CORAL REEFS TRANSFORM OCEAN WAVES AND HELP PROTECT COASTS." Coastal Engineering Proceedings, no. 36v (December 31, 2020): 5. http://dx.doi.org/10.9753/icce.v36v.keynote.5.
Full textAbstract:
Coral reefs help protect tropical islands and coasts against wave-induced flooding. Because ongoing population growth in coastal zones, sea level rise and coral reef degradation, flooding and subsequent damages will likely increase in the future. In this presentation we discuss our current knowledge of the physics of wave transformation on reefs derived from observations and modelling. We will also discuss research questions and data needs.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/JvTmDnoy8E0
15
Zuo, Xiuling, Fenzhen Su, Kefu Yu, Yinghui Wang, Qi Wang, and Huisheng Wu. "Spatially Modeling the Synergistic Impacts of Global Warming and Sea-Level Rise on Coral Reefs in the South China Sea." Remote Sensing 13, no. 13 (July 4, 2021): 2626. http://dx.doi.org/10.3390/rs13132626.
Full textAbstract:
Global warming and sea-level rise (SLR) induced by rising atmospheric CO2 concentrations can cause coral bleaching, death, and submergence of the world’s coral reefs. Adopting the GIS and RS methods, we modeled how these two stressors combine to influence the future growth of the atolls and table reefs of three archipelagoes in the South China Sea (SCS), based on geomorphic and ecological zones. A large-scale survey of the coral communities in Xisha Islands in 2014, Dongsha Islands in 2014–2016 and Nansha Islands in 2007 provided zone-specific process datasets on the range of reef accretion rates. Sea surface temperature and extreme (minimum and maximum) SLR data above 1985–2005 levels by 2100 in the SCS were derived from the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) models forced with the Representative Concentration Pathways (RCPs). Our model projected that: (1) the Xisha Islands and Dongsha Islands may have a better growth status, because the reef flat biotic sparse zone may be recolonized with hard coral and become a biotic dense zone; (2) the southern Nansha Islands reefs have a risk of stopping growing due to their earlier annual bleaching years. The increasing of water depths of these reefs is stronger in the RCP with more emissions. Our approach offers insights into the best-case and worst-case impacts of two global environmental pressures on potential future reef growth under a changing climate.
16
Kennedy, Emma V., Alexandra Ordoñez, and Guillermo Diaz-Pulido. "Coral bleaching in the southern inshore Great Barrier Reef: a case study from the Keppel Islands." Marine and Freshwater Research 69, no. 1 (2018): 191. http://dx.doi.org/10.1071/mf16317.
Full textAbstract:
Spatially explicit coral bleaching data can be used to improve our understanding of the causes and consequences of coral bleaching and help identify resilient reefs. In 2016, the Great Barrier Reef (GBR) experienced the most severe coral bleaching in recorded history, yet, as in previous 1998 and 2002 events, the severity and spatial extent of coral bleaching were variable. Cyclonic activity mitigated warming effects in the southern GBR, meaning corals in this region were predicted to bleach less; as a result, southern reef areas received little attention. Herein we report the effects of the 2016 warming event on southern inshore reefs around the Keppel Islands, an area of high conservation importance, with a history of environmental disturbance. Surveys of 14 reefs revealed paling of coral colonies at every site. A total of 21% of living coral, primarily Pocillopora and branching Acropora, was affected. Findings suggest that southern reefs were affected by warming, although significantly less than in the north. Records of milder bleaching help delineate variability in bleaching severity and extent across the GBR, and add to the historical record of bleaching history in the Keppel Islands, essential to understanding the complexity of exposure and recovery dynamics of the Keppel reefs.
17
Ferdiansyah, M. Husien, Endang Linirin Widiastuti, Teguh Ismail, and Gregorius Nugroho Susanto. "INVENTARIZATION OF CORAL REEFS IN THE WATERS OF RAKATA ISLAND, KRAKATAU ISLANDS." AQUASAINS 8, no. 1 (November 28, 2019): 775. http://dx.doi.org/10.23960/aqs.v8i1.p775-782.
Full textAbstract:
Abstrak Indonesia is an ideal place for coral growth because of the tropical climate. Rakata Island is included in the Krakatau Islands Nature Reserve and Marine Reserve area which is influenced by the volcanic activity of son of Krakatau Archipelago and human activities. Both of these activities will affect the growth of coral reefs. The purpose of this study was to determine the current condition of coral reefs and the diversity of living coral forms on Rakata Island. Collecting data for analysis of coral reef cover using the Line Intercept Transect (LIT) method was parallel to the coastline of Rakata Island at two points. The percentage of live coral cover from points I and II at a depth of 5 meters was 50.69% and 33.80% classified as in good and moderate conditions respectively. While the percentage of live coral cover at a depth of 10 meters at points I and II were 41.90 % and 16.01% whice were in moderate and poor conditions. The coral reefs mostly found in point I were leaf corals (CF) namely Turbinaria reniformis and Turbinaria frondens, while in point II were massive corals (CM) were found i.e. Goniastrea edwardsi, Favia pallida, Montastrea valenciennesi, Favites abdita, Astreopora listeria, and Favites complanata.
18
Vallès, Henri, Hazel A. Oxenford, and Alex Henderson. "Switching between standard coral reef benthic monitoring protocols is complicated: proof of concept." PeerJ 7 (December 3, 2019): e8167. http://dx.doi.org/10.7717/peerj.8167.
Full textAbstract:
Monitoring the state of coral reefs is necessary to identify drivers of change and assess effectiveness of management actions. There are several widely-used survey methods, each of which is likely to exhibit different biases that should be quantified if the purpose is to combine datasets obtained via different survey methods. The latter is a particularly important consideration when switching methodologies in long-term monitoring programs and is highly relevant to the Caribbean today. This is because of the continuing need for regionally comparable coral reef monitoring datasets and the fact that the Global Coral Reef Monitoring Network (GCRMN)-Caribbean node is now recommending a photoquadrat (PQ) method over the chain intercept transect method widely adopted by the members of the first truly regional monitoring network, Caribbean Coastal Marine Productivity Program (CARICOMP), in the early-1990s. Barbados, a member of the CARICOMP network, has been using a variation of the chain intercept method in its long-term coral reef monitoring program for more than two decades. Now a member of GCRMN-Caribbean, Barbados is considering switching to the PQ method in conformity with other regional members. Since we expect differences between methods, this study seeks to quantify the nature of those differences to inform Barbados and others considering switching methods. In 2017, both methods were concurrently implemented at 21 permanent monitoring plots across three major reef types in Barbados. Differences in % cover estimates for the six major benthic components, that is, hard corals, sponges, gorgonians, macroalgae, turf algae and crustose coralline algae, were examined within and among reef types. Overall, we found a complex pattern of differences between methods that depended on the benthic component, its relative abundance, and the reef type. We conclude that most benthic components would require a different conversion procedure depending on the reef type, and we provide an example of these procedures for Barbados. The factors that likely contribute to the complex pattern of between-method differences are discussed. Overall, our findings highlight that switching methods will be complicated, but not impossible. Finally, our study fills an important gap by underscoring a promising analytical framework to guide the comparison of ecological survey methods on coral reefs.
19
Stoddart, D. R. "Coral reefs and islands and predicted sea- level rise." Progress in Physical Geography: Earth and Environment 14, no. 4 (December 1990): 521–36. http://dx.doi.org/10.1177/030913339001400405.
Full text
20
Schleyer, MH, L. Bigot, and Y. Benayahu. "Coral reefs of the Glorieuses Islands, western Indian Ocean." African Journal of Marine Science 40, no. 3 (July 3, 2018): 331–39. http://dx.doi.org/10.2989/1814232x.2018.1512525.
Full text
21
Stoddart, D. "Theory and Reality: The Success and Failure of the Deductive Method in Coral Reef Studies-Darwin to Davis." Earth Sciences History 13, no. 1 (January 1, 1994): 21–34. http://dx.doi.org/10.17704/eshi.13.1.wp354u3281532021.
Full textAbstract:
W. M. Davis's monograph The Coral Reef Problem (1928) and his voluminous other publications on coral reefs present his unambiguous support for Darwin's evolutionary model of the development of reef types through slow subsidence of reef foundations. Davis claimed to find unequivocal support for his views in the features of now-elevated reefs. Since his deductions, expressed in sequential block diagrams, were based on his incorrect belief that elevated reefs eroded rapidly, he was compelled to reject paleontological evidence that many elevated reefs are old. Thus to support his theoretical position he systematically misrepresented the geomorphic history of, for example, the Lau Islands, Eua, the Loyalty Islands, Jaluit Atoll and Mangaia. Not surprisingly this work did not impress contemporaries who had experience of these reefs in the field.
22
Cortés, Jorge, Carlos E. Jiménez, Ana C. Fonseca, and Juan José Alvarado. "Status and conservation of coral reefs in Costa Rica." Revista de Biología Tropical 58, no. 1 (July 3, 2015): 33. http://dx.doi.org/10.15517/rbt.v58i1.20022.
Full textAbstract:
<span>Costa Rica has coral communities and reefs on the Caribbean coast and on the Pacific along the coast and off-shore islands. The Southern section of the Caribbean coast has fringing and patch reefs, carbonate banks, and an incipient algal ridge. The Pacific coast has coral communities, reefs and isolated coral colonies. Coral reefs have been seriously impacted in the last 30 years, mainly by sediments (Caribbean coast and some Pacific reefs) and by El Niño warming events (both coasts). Monitoring is being carried out at three sites on each coast. Both coasts suffered significant reductions in live coral cover in the 1980’s, but coral cover is now increasing in most sites. The government of Costa Rica is aware of the importance of coral reefs and marine environments in general, and in recent years decrees have been implemented (or are in the process of approval) to protect them, but limited resources endanger their proper management and conservation, including proper outreach to reef users and the general public.</span>
23
Alimuddin, Alimuddin, Nurul Chayati, Tedy Murtejo, La Ode M. Gunawan Giu, and Ria Fitri. "Condition of Coral Reefs and Reef Fishes in Dofa Village, Sula Islands Regency." Journal of Applied Geospatial Information 5, no. 1 (March 24, 2021): 431–36. http://dx.doi.org/10.30871/jagi.v5i1.2803.
Full textAbstract:
Coral reefs are unique among ocean associations or communities that are entirely formed by biological activity. This study aims to determine the condition of coral reefs and reef fishes in Dofa Village, West Mangoli District, Sula Islands, 2018. Collecting coral data used the Line Intercept Transect (LIT) method, while coral fish data collection used the visual census method. Water parameters measured are temperature, salinity, degree of acidity (pH), brightness and current velocity. Based on observations, the water temperature ranges from 29.33° C - 29.9° C. The salinity of the waters ranges from 29.67 ‰ - 34 ‰. The degree of acidity is 7.5 which supports the life of coral reef. The water brightness level is 65% - 100%. The current velocity ranges from 0.02 m / s to 0.05 m / s. The condition of the coral reef ecosystem based on the percentage of hard coral cover ranged from 21.02% - 33.7% with low to medium category. The coral mortality index at the study location was small where at station 1 it was 0.487, station 2 was 0.335 and station 3 was 0.205, meaning that there was no significant change for live coral reefs. The abundance of reef fishes ranged from 0.52 ind/m2 - 1.22 ind/m2 which was dominated by the Pomacentridae and Labridae families where the two families were groups of fish that used coral reefs as habitat for feeding ground. The index value of coral fish diversity in the coral reef ecosystem at all stations ranged from 0.58 to 3.60 where the diversity index value was in the low to medium category. The uniformity index is included in the medium category with values ranging from 0.58 to 0.63 which illustrates that the difference in the number of individuals for each species is not too significant. The dominance index of reef fishes at the observation station is very small, ranging from 0.03 - 0.07 which indicates that the dominance of the species is very low, so that the condition of the reef fish community is relatively stable.
24
Allen, Mary E., Chloe S. Fleming, Sarah B. Gonyo, Erica K. Towle, Maria K. Dillard, Arielle Levine, Matt Gorstein, et al. "Resident Perceptions of Ecosystem Services Provided by U.S. Coral Reefs: Highlights from the First Cycle of the National Coral Reef Monitoring Program’s Socioeconomic Survey." Water 13, no. 15 (July 30, 2021): 2081. http://dx.doi.org/10.3390/w13152081.
Full textAbstract:
Despite being among the most valuable ecosystems on Earth, coral reefs face ongoing threats that could negatively impact the human populations who depend on them. The National Coral Reef Monitoring Program (NCRMP) collects and monitors data on various aspects of U.S. coral reefs to provide a holistic understanding of the status of the reefs and adjacent human communities. This paper explores results from the NCRMP’s first socioeconomic monitoring cycle using an ecosystem services framework and examines how these results can be used to improve coral reef management in the following U.S. coral reef jurisdictions: American Samoa, the Commonwealth of the Northern Mariana Islands, Florida, Guam, Hawai’i, Puerto Rico, and the U.S. Virgin Islands. Results suggest that residents in the U.S. Pacific coral reef basin may hold stronger cultural and provisioning values, whereas residents in the U.S. Atlantic coral reef basin may hold stronger regulating values. These findings suggest that outreach efforts have been successful in communicating benefits provided by coral reef ecosystems to the public. They also provide insight into which ecosystem services are valued in each jurisdiction, allowing resource managers to make science-based decisions about how to communicate conservation and management initiatives.
25
Cannon, Sara E., Erietera Aram, Toaea Beiateuea, Aranteiti Kiareti, Max Peter, and Simon D. Donner. "Coral reefs in the Gilbert Islands of Kiribati: Resistance, resilience, and recovery after more than a decade of multiple stressors." PLOS ONE 16, no. 8 (August 11, 2021): e0255304. http://dx.doi.org/10.1371/journal.pone.0255304.
Full textAbstract:
Coral reefs are increasingly affected by a combination of acute and chronic disturbances from climate change and local stressors. The coral reefs of the Republic of Kiribati’s Gilbert Islands are exposed to frequent heat stress caused by central-Pacific type El Niño events, and may provide a glimpse into the future of coral reefs in other parts of the world, where the frequency of heat stress events will likely increase due to climate change. Reefs in the Gilbert Islands experienced a series of acute disturbances over the past fifteen years, including mass coral bleaching in 2004–2005 and 2009–2010, and an outbreak of the corallivorous sea star Acanthaster cf solaris, or Crown-of-Thorns (CoTs), in 2014. The local chronic pressures including nutrient loading, sedimentation and fishing vary within the island chain, with highest pressures on the reefs in urbanized South Tarawa Atoll. In this study, we examine how recovery from acute disturbances differs across a gradient of human influence in neighboring Tarawa and Abaiang Atolls from 2012 through 2018. Benthic cover and size frequency data suggests that local coral communities have adjusted to the heat stress via shifts in the community composition to more temperature-tolerant taxa and individuals. In densely populated South Tarawa, we document a phase shift to the weedy and less bleaching-sensitive coral Porites rus, which accounted for 81% of all coral cover by 2018. By contrast, in less populated Abaiang, coral communities remained comparatively more diverse (with higher percentages of Pocillopora and the octocoral Heliopora) after the disturbances, but reefs had lower overall hard coral cover (18%) and were dominated by turf algae (41%). The CoTs outbreak caused a decline in the cover and mean size of massive Porites, the only taxa that was a ‘winner’ of the coral bleaching events in Abaiang. Although there are signs of recovery, the long-term trajectory of the benthic communities in Abaiang is not yet clear. We suggest three scenarios: they may remain in their current state (dominated by turf algae), undergo a phase shift to dominance by the macroalgae Halimeda, or recover to dominance by thermally tolerant hard coral genera. These findings provide a rare glimpse at the future of coral reefs around the world and the ways they may be affected by climate change, which may allow scientists to better predict how other reefs will respond to increasing heat stress events across gradients of local human disturbance.
26
Zhao, Meixia, Kefu Yu, Qi Shi, Hongqiang Yang, Bernhard Riegl, Qiaomin Zhang, Hongqiang Yan, Tianran Chen, Guohui Liu, and Ziyun Lin. "The coral communities of Yongle atoll: status, threats and conservation significance for coral reefs in South China Sea." Marine and Freshwater Research 67, no. 12 (2016): 1888. http://dx.doi.org/10.1071/mf15110.
Full textAbstract:
Xisha Islands are in the central South China Sea and form one of the four large island groups in this region. They include more than 40 islands, reefs and cays, and have considerable ecological and biodiversity value, both intrinsically and as a source of larvae for coastal ecosystems throughout the South China Sea. Yongle atoll is the biggest and one of the most important atolls in the Xisha Islands. The detailed surveys of the marine habitats in the Yongle atoll were conducted from June to July 2013. This baseline survey revealed coral communities in a relatively healthy condition. Mean coral cover of different geomorphic habitats varied from 2 to 29%. Branching corals were most important, followed by encrusting and massive growth forms (48, 29 and 17% of coral cover). Pocillopora (29% of total cover in line transects), Porites (19%), Acropora (17%) and Montipora (16%) were the four dominant genera. Communities differentiated into four clusters, namely, lower reef slope, upper reef slope, outer reef flat, and inner reef flat and lagoon slope. This baseline investigation highlighted the ecological value of these reefs. Destructive fishing and overfishing are presently the most serious threats for these coral reefs. They should receive much more scientific and conservation attention.
27
Kunzmann, Andreas, Zainal Arifin, and Gunilla Baum. "POLLUTION OF COASTAL AREAS OF JAKARTA BAY: WATER QUALITY AND BIOLOGICAL RESPONSES." Marine Research in Indonesia 43, no. 1 (June 30, 2018): 37–51. http://dx.doi.org/10.14203/mri.v43i1.299.
Full textAbstract:
Coastal development, growing urbanization and industrialization are the most important stressors of coral reefs worldwide. Jakarta is one of the largest megacities worldwide. The coral reefs of the Thousand Islands north of Jakarta have degraded dramatically over the last 30-40 years. While large-scale gradients (i.e., regional drivers) have been extensively studied and shown shifts and declines in coral cover and composition, local drivers and their impact on spatial community composition have been neglected. The aim of our study is to investigate the spatial impact of anthropogenic stressors on local and regional scales on coral reefs north of Jakarta. Our results demonstrate that reefs in the north of the Thousand Islands are separated from the reefs in Jakarta Bay (JB), where a direct impact of Jakarta can be seen. Local anthropogenic effects rather than regional gradients have shaped a spatial patchwork of differentially degraded reefs along the nearshore islands. The main anthropogenic stressor is pollution and sedimentation rate, NO2, PO4 and chlorophyll-a explain over 80% of the variation. Surfactants and diesel-borne compounds from sewage and bilge water discharges are common pollutants. Responses to combinations of selected pollutant with elevated temperature (+3°C) were determined in the metabolic performance of the coral reef fish Siganus guttatus. During combined exposure, metabolic depression was observed. Effects of pollutants were not amplified by elevated temperature. In a study about two dominant soft coral genera, Sarcophyton spp. and Nephthea spp., on dissolved inorganic nutrients (DIN), turbidity (NTU), and sedimentation combined with measurements of photosynthetic yield and respiratory electron system (ETS) activity water quality seems to control the relative abundance and physiology of dominant soft corals in JB. In order to reverse or prevent phase shifts from hard to soft corals, there is a need to manage the water quality better. It is concluded that the intense anthropogenic pressure from local as well as regional sources is responsible for the spatial structure and health of reefs. Therefore, improved spatial management with a focus on both local and regional stressors is needed for effective marine conservation.
28
Adji, Arif Seno. "SUITABILITY ANALYSIS OF MULTISPECTRAL SATELLITE SENSORS FOR MAPPING CORAL REEFS IN INDONESIA CASE STUDY: WAKATOBI MARINE NATIONAL PARK." Marine Research in Indonesia 39, no. 2 (November 19, 2015): 73–78. http://dx.doi.org/10.14203/mri.v39i2.87.
Full textAbstract:
Providing accurate information on suitable multispectral satellite sensors for mapping coral reefs in Indonesia is a challenge for coastal remote-sensing experts. As coral reefs vary in spatial extent, shape, length, perimeter and/or distance to shore, the mapping of coral reefs will need different satellite sensors depending on the objectives and the kind of information required. This work compares the suitability of two kinds of multispectral satellite sensors for mapping coral reefs in Indonesia, high and moderate spatial resolution. This was done through a case study of Wakatobi Marine National Park since that represents many types of coral reef in Indonesia (fringing, barrier, atoll, and patch). Indonesian coral reef shapefile data 2010 was downloaded from UNEP (United Nations Environment Programme) website, and Landsat 7 ETM + images, path/row 112/064 was used to determine the terrestrial area of Wakatobi Islands. Both high and moderate spatial resolution sensors are suitable for mapping the benthic communities and geomorphic zones on coral reefs. The former are more accurate but they are also much less cost-effective, especially over large areas.
29
Schuhmann, Peter, Ryan Skeete, Richard Waite, Prosper Bangwayo-Skeete, James Casey, Hazel A. Oxenford, and David A. Gill. "Coastal and Marine Quality and Tourists’ Stated Intention to Return to Barbados." Water 11, no. 6 (June 17, 2019): 1265. http://dx.doi.org/10.3390/w11061265.
Full textAbstract:
Seawater quality is critical for island and coastal communities dependent on coastal tourism. Improper management of coastal development and inland watersheds can decrease seawater quality and adversely impact marine life, human health, and economic growth. Agricultural runoff and improper sewage management compromise nearshore water quality in many coastal regions and can impact visitation decisions of tourists who are drawn to these destinations. The purpose of this paper is to understand how tourists’ decisions to revisit Barbados might be affected by changes in coastal and marine quality. We use data collected from tourists to examine how tourists’ stated willingness to return is affected by scenarios involving changes in seawater quality, beach width and coral reef health. Results reveal that return decisions are sensitive to changes in all aspects of coastal and marine quality. A reduction in seawater quality discourages tourists’ intention to return more than other environmental factors. These results are of paramount interest to destination managers, marketers and policymakers who rely on repeat visitation data to develop marketing strategies and infer future direction. This research highlights the importance of prioritizing seawater quality management to protect the coastal tourism product, especially in small island developing states (SIDS) with a high reliance on tourism income.
30
LUBIS, MUHAMMAD ZAINUDDIN, SRI PUJIYATI, DANIEL S. PAMUNGKAS, MUHAMMAD TAUHID, WENANG ANUROGO, and HUSNUL KAUSARIAN. "Coral reefs recruitment in stone substrate on Gosong Pramuka, Seribu Islands, Indonesia." Biodiversitas Journal of Biological Diversity 19, no. 4 (July 1, 2018): 1451–58. http://dx.doi.org/10.13057/biodiv/d190435.
Full textAbstract:
Lubis MZ, Pujiyati S, Tauhid M, Anurogo W, Kausarian H. 2018. Coral reefs recruitment in stone substrate on GosongPramuka, Seribu Islands, Indonesia. Biodiversitas 19: 1451-1458. Gosong Pramuka is a reef distribution area located in the center of theSeribu Islands of Jakarta, Indonesia. This research was conducted from April to June 2015, located within the Gosong Pramuka area,Kepulauan Seribu, Indonesia. This location has 4 observation stations: Exposed I and II and Shielded I and II. Coral reefs identified atthe study sites consisted of 95 colonies, with colonies most abundant in Exposure Station I (35 colonies), and in the genus Acropora andPorites. Acropora coral growth is tabulated, branching, digitate and encrusting, and Porites are only sub-massive and massive. Theaverage area obtained from recruiting coral colonies had a range of 25-50 cm2, and the average diameter of coral recruits was 9-12 cm.The results of this research determined the coral health index of the area is 2-3. Based on the CoralWatch method, the coral at the stationwhere the research was conducted is classified as under stress conditions. The value of recalculated coral density obtained in this studywas 0.22 colony/m2 at Exposure Station I, 0.11 colony/m2 at Shielded Station I, 0.13 colony/m2 at Exposure Station II, and in 0.11colony/m2 at Shielded Station II. Temperatures in all four stations range from 30-32°C; this temperature range is within the optimumtemperature range for coral growth. The depth at all four stations was in the ranged from 70-98 cm; this indicates the stations where theresearch was conducted is still within an optimum depth.
31
Ben, Hoang Xuan, and Vo Si Tuan. "Recent use of habitat service value for tourism and impacts on coral reefs in the target destinations in Southern Vietnam." Tạp chí Khoa học và Công nghệ biển 19, no. 4A (November 8, 2019): 131–38. http://dx.doi.org/10.15625/1859-3097/19/4a/14601.
Full textAbstract:
Coral reef-based tourism has developed quickly in Southern Vietnam, taking into account the target locations namely Cu Lao Cham islands, Nha Trang bay, Ninh Thuan and Phu Quoc islands during last decade. Among them, Nha Trang bay had longer history of marine tourism, starting with inshore development and expanding to islands in and around the bay. Tourist activities in Cu Lao Cham islands and Ninh Thuan were developed in linkages with MPA development and management. Meanwhile, Phu Quoc had become a new destination and drawn huge investments for extensive development of tourism in the islands. Economic value that was brought from use of coral reefs for tourism has increased significantly. For example, the payment of entry fee to Cu Lao Cham MPA has quickly increased year by year, reaching approximately 700,000 USD in 2018 and that in Ninh Thuan around 50,000 in 2017 and up to 200,000 USD in 2018. Reclamation for infrastructure building on inshore land and islands was considered as a serious impact, resulting in loss of terrestrial and underwater habitats (e.g. loss of Melaleuca forest in Phu Quoc islands or seagrass beds and coral reefs in Nha Trang bay) and increased sediment loading to coral reefs. Overexploitation of living resources for high food and souvenir demands occurred at all areas, leading to modification of communities, poorness and uncertainty for resource recruitment. Among these tree areas, Phu Quoc waters are the most vulnerable to coral bleaching due to increased surface temperature with records of mass bleaching in 2010 and 2016. Although MPAs existed in all study areas, role of conservationists in developing coral reef tourism was significantly considerable only in Cu Lao Cham case but poor in others. Local managers and businesses should pay more attention to sustainability in order to ensure not only coral reef conservation but also long-term benefits of local communities and tourist sector itself.
32
SINGH, ABHINAV, HAO WANG, WENDY MORRISON, and HOWARD WEISS. "MODELING FISH BIOMASS STRUCTURE AT NEAR PRISTINE CORAL REEFS AND DEGRADATION BY FISHING." Journal of Biological Systems 20, no. 01 (March 2012): 21–36. http://dx.doi.org/10.1142/s0218339011500318.
Full textAbstract:
Inverted biomass pyramids (IBPs) seem to be extremely rare in natural communities. Until recently, the only examples have been in freshwater and marine planktonic communities. In 2002 and 2008, investigators documented inverted biomass pyramids for nearly pristine coral reef ecosystems within the NW Hawaiian islands and the Line Islands, where apex predator abundance comprises up to 85% of the fish biomass. Large predator:prey biomass ratio seems to be a signature of nearly pristine coral reefs. While the mechanism responsible for the IBP for homogeneously mixed planktonic communities seems to be well understood, this mechanism is not strictly applicable to nearly pristine coral reefs where much of the prey use coral as refuge and are inaccessible to the predators. We construct a mathematical model with an explicit refuge to illustrate a new biologically plausible mechanism that can explain stable IBPs in nearly pristine coral reefs. New modeling components include a refuge of explicit size, a refuge size dependent functional response, and refuge size dependent prey growth rate. Utilizing realistic life history parameters of coral reef fishes, our model exhibits a stable inverted biomass pyramid. We prove that all fishing decreases the biomass ratio and sufficiently strong fishing transforms the inverted biomass pyramid to be bottom heavy. Finally we use our model to test the conjecture that pristine coral reefs will rebound faster from environmental shocks and find that it is not always true.
33
Wang, Jin Chao, Chuan Ying Wang, and Zeng Qiang Han. "Evaluation Method of Coral Reef Integrity: RMDI and Coring Rate Comparative Analysis Method." Advanced Materials Research 989-994 (July 2014): 1396–99. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1396.
Full textAbstract:
At present, relatively few drilling surveys have been conducted on coral reefs, and comprehensive geological info on coral reefs is difficult to obtain. However, research of coral reef is of great importance to our development and exploitation of maritime resources. The survey of South China Sea some Islands saw China’s first usage of digital borehole camera technology, which resulted in a large amount of first-hand geological data. Because the coral reef, special rock mass, integrity evaluation is very difficult, we proposed the RMDI and coring rate comparative analysis method. The evaluation method is applied to the South China Sea some Islands, and the evaluation results prove generally consistent with actual cores. The results indicate that: (1) high-resolution borehole images can provide reliable results for evaluation of coral reef integrity; (2) The RMDI and coring rate comparative analysis method is a feasible approach for the evaluation of coral reef integrity along the full or partial depth of a borehole.
34
Seenprachawong, Udomsak. "Economic valuation of coral reefs at Phi Phi Islands, Thailand." International Journal of Global Environmental Issues 3, no. 1 (2003): 104. http://dx.doi.org/10.1504/ijgenvi.2003.002413.
Full text
35
Zann, Leon P. "The status of coral reefs in South Western Pacific Islands." Marine Pollution Bulletin 29, no. 1-3 (January 1994): 52–61. http://dx.doi.org/10.1016/0025-326x(94)90426-x.
Full text
36
Vijay Anand, P. E. "Proximity of coral reefs and mangroves in the Andaman Islands." Coral Reefs 14, no. 2 (May 1995): 108. http://dx.doi.org/10.1007/bf00303431.
Full text
37
Leão, Zelinda M. A. N., Ruy K. P. Kikuchi, Beatrice P. Ferreira, Elizabeth G. Neves, Hilda H. Sovierzoski, Marília D. M. Oliveira, Mauro Maida, Monica D. Correia, and Rodrigo Johnsson. "Brazilian coral reefs in a period of global change: A synthesis." Brazilian Journal of Oceanography 64, spe2 (2016): 97–116. http://dx.doi.org/10.1590/s1679-875920160916064sp2.
Full textAbstract:
Abstract Brazilian coral reefs form structures significantly different from the well-known reef models, as follows: (i) they have a growth form of mushroom-shaped coral pinnacles called "chapeirões", (ii) they are built by a low diversity coral fauna rich in endemic species, most of them relic forms dating back to the Tertiary, and (iii) the nearshore bank reefs are surrounded by siliciclastic sediments. The reefs are distributed in the following four major sectors along the Brazilian coast: the northern, the northeastern and the eastern regions, and the oceanic islands, but certain isolated coral species can be found in warmer waters in embayments of the southern region. There are different types of bank reefs, fringing reefs, isolated "chapeirões" and an atoll present along the Brazilian coast. Corals, milleporids and coralline algae build the rigid frame of the reefs. The areas in which the major coral reefs occur correspond to regions in which nearby urban centers are experiencing accelerated growth, and tourism development is rapidly increasing. The major human effects on the reef ecosystem are mostly associated with the increased sedimentation due to the removal of the Atlantic rainforest and the discharge of industrial and urban effluents. The effects of the warming of oceanic waters that had previously affected several reef areas with high intensity coral bleaching had not shown, by the time of the 2010 event, any episodes of mass coral mortality on Brazilian reefs.
38
Thung, Do Cong, and Dao Minh Dong. "DIVERSITY OF ECHINODERMS (ECHINODERMATA) IN THE NORTH EASTERN ISLANDS, VIETNAM." Tạp chí Khoa học và Công nghệ Biển 18, no. 3 (November 3, 2018): 296–303. http://dx.doi.org/10.15625/1859-3097/18/3/13232.
Full textAbstract:
41 species have been identified, belonging to 29 genera, 18 families, 10 orders and 5 classes of Echinoderms in Northeast islands, from Mong Cai (Quang Ninh) to Do Son (Hai Phong). Compared to previous publications, 15 species were first identified in the Tonkin Gulf. The diversity of species numbers shows that Oreasteridae and Holothuriidae have the highest number of species (5 species/family), similarly the genus Holothuri has the highest species number (5 species). Ha Long Bay - Cat Ba has 33 species; Co To - Thanh Lan has 24 species and Bai Tu Long has 25 species. Echinoderms live in three habitats: Sand, coral, reef. The highest number of species is living in the sandy bottom and coral reefs, 39% and the lowest number only about 10% in coral reefs and reef. Van Boi, Van Ha, Da Den, Bac Van, Hong Van have high density of Echinoderms, potentially becoming marine medicine yards.
39
Bargar, Timothy A., Virginia H. Garrison, David A. Alvarez, and Kathy R. Echols. "Contaminants assessment in the coral reefs of Virgin Islands National Park and Virgin Islands Coral Reef National Monument." Marine Pollution Bulletin 70, no. 1-2 (May 2013): 281–88. http://dx.doi.org/10.1016/j.marpolbul.2013.03.001.
Full text
40
Wang, Jin Chao, Chuan Ying Wang, and Zeng Qiang Han. "Analysis of Coral Reef Rock Mass Integrity Based on RMDI Method." Applied Mechanics and Materials 580-583 (July 2014): 641–50. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.641.
Full textAbstract:
At present, relatively few drilling surveys have been conducted on coral reefs, and comprehensive geological info on coral reefs is difficult to obtain. However, research of coral reef is of great importance to our development and exploitation of maritime resources. The survey of Chenhang Island in Paracel (Xisha) Islands saw China’s first usage of digital borehole camera technology, which resulted in a large amount of first-hand geological data. We have utilized the rock mass integrity index (RMDI) method in our analysis of coral reef integrity, and with reference to the rock mass classification standard, formulated the correlation between RMDI values and coral reef intactness, enabling the engineering evaluation of coral reef integrity. Through statistical analysis of camera data gathered along the CK2 borehole’s approx. 1km length, we performed an integrity evaluation of the entire borehole length using the RMDI classification, and created a coral reef stratum development diagram which is consistent with the actual cores. The results indicate: (1) the classification system based on RMDI is feasible in the integrity evaluation of coral reefs; (2) the coral reef integrity values obtained using the RMDI method are accurate; (3) borehole camera survey and statistical analysis are of great utility in the study of coral reefs.
41
Yamano, Hiroya, Osamu Abe, Hiroyuki Kitagawa, Etsuko Niu, and Toshio Nakamura. "Coral Reef Evolution at the Leeward Side of Ishigaki Island, Southwest Japan." Radiocarbon 43, no. 2B (2001): 899–908. http://dx.doi.org/10.1017/s0033822200041564.
Full textAbstract:
In comparison with windward coral reefs, the facies and evolution of leeward coral reefs has been discussed to a lesser extent. By accelerator mass spectrometry (AMS) carbon-14 dating of coral specimens collected from the trench excavated across a modern coral reef during a fishery port repair, we revealed the internal facies and Holocene evolution of a leeward reef in Ishigaki Island, Ryukyu Islands, southwest Japan. The reef facies can be split into three facies: the tabular Acropora framework facies, the tabular Acropora reworked facies, and the unconsolidated bioclast facies. The tabular Acropora reworked facies first formed a ridge by 3500 BR Then, the tabular Acropora framework facies grew both upward and seaward. The accumulation rates of the tabular Acropora framework facies ranged from 2.2 to 8.3 m/ka. Thus, the reef framework facies and accumulation rates of this leeward reef is similar to those of windward reefs, although the age of the reef top is younger than that of windward reefs.
42
Ompi, Billy N., Unstain N. W. J. Rembet, and Ari B. Rondonuwu. "Coral Reef Conditions of Hogow and Dakokayu Islands Southeast Minahasa Regency." JURNAL ILMIAH PLATAX 7, no. 1 (January 30, 2019): 186. http://dx.doi.org/10.35800/jip.7.1.2019.22743.
Full textAbstract:
This research objective was to determine the condition of Coral Reef ecosystems in Dakokayu and Hogow Islands, Southeast Minahasa Regency. The method that has been used in this studies that is Line Intercept Transect (LIT) by diving activities at 5 meter and 10 meters depth with 50 meters transect length. Each biota passed by the line transect recorded according based on shape of growth.Coral Reefs conditon in Hogow Island in 5 meters and 10 meters depth were categorized as a “Good” where the percentage of live coral cover in 5 meters depth is 70.12% and in 10 meters depth is 55.78%. The condition of Coral Reefs on Dokokayu Island at a depth of 5 meters is categorized “Good” with the percentage of live coral cover is 56.32% while in the 10 meters depth it is categorized as “Medium” with the percentage of live coral cover is 48.10%. Water quality parameters such as temperature, salinity, brightness, pH, and dissolved oxygen (DO) are within the range of tolerance for Coral Reefs to survive.Keywords: Condition, Coral Reef, Hogow, DokokayuABSTRAKTujuan penelitian untuk mengetahui kondisi ekosistem terumbu karang di Pulau Dakokayu dan Pulau Hogow, Kabupaten Minahasa Tenggara. Metode yang telah digunakan dalam penelitian ini yaitu Line Intercept Transek (LIT) dengan melakukan penyelaman pada kedalaman 5 dan 10 meter dengan panjang transek 50 meter. Setiap biota yang dilewati transek akan dicatat menurut bentuk pertumbuhannya. Secara umum, kondisi terumbu karang di Pulau Hogow pada kedalaman 5 meter dan 10 meter, dikategorikan Baik dimana persentasi tutupan karang hidup pada kedalaman 5 meter sebesar 70,12% dan pada kedalaman 10 meter sebesar 55,78%. Kondisi terumbu karang di Pulau Dokokayu pada kedalaman 5 meter dikategorikan Baik dengan persentase tutupan karang hidup 56,32% sedangkan di kedalaman 10 meter dikategorikan Sedang dengan persentase tutupan karang hidup 48,10 %. Parameter kualitas perairan seperti suhu, salinitas, kecerahan, pH, dan oksigen terlarut (DO) berada dalam kisaran toleransi bagi terumbu karang untuk dapat bertahan hidup.Kata Kunci : Kondisi, Terumbu Karang, Hogow, Dokokayu
43
Putra, Singgih Afifa. "RAPID SURVEYS REVEAL HEALTHY CORAL-SPONGE COMMUNITIES ON KRAKATAU REEFS." BERITA BIOLOGI 19, no. 1 (April 30, 2020): 109–25. http://dx.doi.org/10.14203/beritabiologi.v19i1.3779.
Full textAbstract:
The Krakatau Islands in the Sunda Strait have been significantly impacted by catastrophic volcanic eruptions in 1883 and 2018. The marine habitats are not well studied, neither in the past nor in the present. This research is a report on the distribution and ecology of corals and sponges in the Krakatau Volcanic Complex at the three islands of Anak Krakatau, Rakata, and Panjang. This study used 100 m transects long in 5–7 m depth. Hard coral and soft coral communities are found to live with a coverage varied between 25-53% and 0-24%. Dead coral skeletons covered 14–40% of the surveyed area and did not seem to affect the abundance of sponges recorded. The Sponges occupied 0–6% of the area, and they often acted as coral competitors, shaping the benthic ecosystems. The recorded sponges only belong to the Demospongiae class, which are the Suberitid species that are commonly found in Indonesian waters, e.g., Amorphinopsis excavans, Protosuberites collaris, and Terpios sp. The excavating sponge Cliona cf. orientalis was frequently found to be a successful competitor of massive Porites sp., aggressively overgrowing live parts of the coral. Two Haliclona species and Mycale relicta colonized dead coral skeleton. Overall, the benthic communities appear healthy and are comparable to other similar locations that are not affected by volcanic activity.
44
Lewis, J. "Evidence from aerial photography of structural loss of coral reefs at Barbados, West Indies." Coral Reefs 21, no. 1 (February 2, 2002): 49–56. http://dx.doi.org/10.1007/s00338-001-0198-1.
Full text
45
UYARRA, MARIA C., ISABELLE M. CÔTÉ, JENNIFER A. GILL, ROB R. T. TINCH, DAVID VINER, and ANDREW R. WATKINSON. "Island-specific preferences of tourists for environmental features: implications of climate change for tourism-dependent states." Environmental Conservation 32, no. 1 (March 2005): 11–19. http://dx.doi.org/10.1017/s0376892904001808.
Full textAbstract:
Climate change may affect important environmental components of holiday destinations, which might have repercussions for tourism-dependent economies. This study documents the importance of environmental attributes in determining the choice and holiday enjoyment of tourists visiting Bonaire and Barbados, two Caribbean islands with markedly different tourism markets and infrastructure. Three hundred and sixteen and 338 participants from Bonaire and Barbados, respectively, completed standardized questionnaires. Warm temperatures, clear waters and low health risks were the most important environmental features determining holiday destination choice. However, tourists in Bonaire thereafter prioritized marine wildlife attributes (i.e. coral and fish diversity and abundance) over other environmental features, whereas tourists in Barbados exhibited stronger preferences for terrestrial features, particularly beach characteristics. The willingness of tourists to revisit these islands was strongly linked to the state of the preferred environmental attributes. More than 80% of tourists in Bonaire and Barbados would be unwilling to return for the same holiday price in the event, respectively, of coral bleaching as a result of elevated sea surface temperatures and reduced beach area as a result of sea level rise. Climate change might have a significant impact on Caribbean tourism economy through alteration of environmental features important to destination selection. Island-specific management strategies, such as focusing resources on the protection of key marine or terrestrial features, may provide a means of reducing the environmental and economic impacts of climate change.
46
Dat, Mai Xuan. "Coral reef fishes in the banks and rocky islands in the offshore waters of Binh Thuan province." Tạp chí Khoa học và Công nghệ biển 19, no. 4A (November 8, 2019): 259–71. http://dx.doi.org/10.15625/1859-3097/19/4a/14590.
Full textAbstract:
Binh Thuan province is located in the South Central Coast of Vietnam with favorable conditions for living coral reefs. The coral reefs were mainly investigated in coastal water areas and Phu Quy island, meanwhile other areas such as the banks and rocky islands seem to lack information. This study was conducted to evaluate the species composition and distribution of coral reef fish communities in the Royal Bishop banks and around rocky islands in Julia shoal in the offshore waters of Binh Thuan province in April 2019. A total of 151 species belonging to 86 genera and 33 families of coral reef fishes were recorded. Among them, 4 species for the first time recorded in Vietnam are Helcogramma striata (Hansen, 1986) (Tripterygiidae), Pseudanthias squamipinnis (Peters, 1855) (Serranidae), Bodianus bilunulatus (Lacepède, 1801) and Coris aygula (Lacepède, 1801) (Labridae). The total average density of coral reef fish in the offshore waters of Binh Thuan is quite high at 1,104.9 ± 617 individuals/250 m2, most of them are small sized fish and ornamental fish group, the large sized fish and target fish group accounts for a relatively low rate, but their density here is much higher compared to that in the coastal waters of Binh Thuan province. The comparative analysis also shows that sites in coral reef around rocky islands have species richness and density of coral reef fish higher than the bank area.
47
Harriott, Vicki J., Simon A. Banks, Roland L. Mau, Darren Richardson, and Lisa G. Roberts. "Ecological and conservation significance of the subtidal rocky reef communities of northern New South Wales, Australia." Marine and Freshwater Research 50, no. 4 (1999): 299. http://dx.doi.org/10.1071/mf98042.
Full textAbstract:
The subtropical rocky reefs of Cook Island, Julian Rocks and the South West Rocks area form part of a chain of islands and reefs with significant coral cover from the Queensland border (28˚S) to the southern extent of extensive coral communities in coastal Australia (31˚S). Benthic communities at 18 subtidal sites at the three localities were surveyed quantitatively by video-transects, and coral species lists were compiled. Twenty-eight coral species previously unrecorded for these localities were identified, increasing the species richness of hermatypic corals reported for the northern NSW region (excluding the Solitary Islands) from 14 to 43. Coral species richness declined with latitude. Benthic communities were generally dominated by turfing and macroalgal species, with Pyura, sponges, and barnacles locally abundant. Scleractinian coral cover ranged from 0% to 42.6% per site, with highest coral cover at the most southern site. Julian Rocks is a designated Aquatic Reserve, and Marine Parks have been suggested for all three localities. Selection of Marine Protected Areas requires information on their ecological significance. These surveys report the first quantitative information on the shallow- water, rocky-reef communities in the region, which is a vital step in assessing their ecological significance.
48
Sadhukhan, Koushik, Ramesh Chatragadda, T. Shanmugaraj, and M. V. Ramana Murthy. "New recruitment of staghorn corals in the Gulf of Mannar – the emergence of a resilient coral reef." Journal of Threatened Taxa 11, no. 14 (November 26, 2019): 14908–11. http://dx.doi.org/10.11609/jott.4767.11.14.14908-14911.
Full textAbstract:
Coral Reefs in Gulf of Mannar is degrading with fatser rate due to several environmental stress over the past few decades. Under this severe degredation phase, our work has observed significant coral recruitment at Hare Island and Manoli & Manoliputti Island of Gulf of Mannar. Occurrenc of new recruitment of corals increseas the live coral cover percentage upto 58.4% and 51.5% in both Islands respectively. The findings reported here that increased percentage of coral cover brings a new hope for the researcher to find out the possible driving forces to the successful post larval settlement and survival of the new recruits which results in better conservation and management plan for the coral reefs of GoM Marine National Park.
49
Hoeksema, Bert W., Yosephine Tuti, and Suharsono. "CRYPTIC MARINE BIODIVERSITY OF RAJA AMPAT ISLANDS." Marine Research in Indonesia 34, no. 2 (December 31, 2009): 97–101. http://dx.doi.org/10.14203/mri.v34i2.515.
Full textAbstract:
During a marine field survey in Raja Ampat as part of Ekspedisi Widya Nusantara (E-win), 21 scientists, studied the area's cryptic biota on coral reefs and in marine lakes. Cryptic species lead hidden lives due to their small size, successful camouflage or mimicry, or because they live in habitats that are easily overlooked or hard to access. Hundreds of species were sampled, many of which still have to be identified. The species richness of Raja Ampat appears to be very high, even among other areas within the centre of maximum marine biodiversity, the so-called Coral Triangle.
50
Putra, Singgih Afifa, Indra Ambalika Syari, Helmy Akbar, Iwan Suyatna, and Davin H. E. Setiamarga. "Human activities and persistent coral reef degradation in Gaspar Strait, Bangka Belitung Islands, Indonesia." F1000Research 7 (December 20, 2018): 1962. http://dx.doi.org/10.12688/f1000research.16519.1.
Full textAbstract:
Background: The aim of the study was to describe the coral reef condition in Bangka Belitung Islands, particularly from Gaspar Strait. This research location is well known for its underwater archaeological discovery and shipwreck sites. Recent increases in mining, fishing and tourism activities in the surrounding islands might have affected the condition of the coral reef. Methods: Nine islands inside the strait were visited (i.e. Langer, Kembung, Piling, Aur, Salma, Pongok, Celagen, Kelapan, and Lepar Island), and a line transect was used to observed coral reef conditions. Results: Coral cover was found to be predominantly in fair conditions (25-50%). Coral mortality index also tended to be high, which indicated that the coral reef ecosystem was in threatened conditions. Previous and recent reports also reported the same condition as found by this study. Conclusion: Degradation of the coral community in Bangka Belitung Islands is likely caused by human activities. This suggests that increasing human activities significantly affects the coral reef condition. Protection of coral reefs with sustainable management for mining activity, tourism and fishing practices are needed.