Relevant bibliographies by topics / Atolls / Journal articles
To see the other types of publications on this topic, follow the link: Atolls.

Journal articles on the topic 'Atolls'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Atolls.'

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

Larrue, Sébastien, Jean-François Butaud, Pascal Dumas, and Stéphane Ballet. "Native plant species richness on Eastern Polynesia’s remote atolls." Progress in Physical Geography: Earth and Environment 40, no. 1 (November 30, 2015): 112–34. http://dx.doi.org/10.1177/0309133315615804.

Full text
Abstract:
Which abiotic factors influence the number of native plant species on remote atolls is an important question to understand better the spatial pattern of the species observed on these low and vulnerable coral islands. However, this issue is still very poorly documented, often due to human degradation, partial botanical surveys or the difficult geographic access of remote atolls for researchers. The remote atolls of Eastern Polynesia, which are among the most isolated in the world, are of great interest for studies of native species’ distribution due to their isolation, low human density and urbanisation. In this study, we selected 49 remote atolls of Eastern Polynesia with complete botanical surveys to test the relative influence of eight abiotic factors on native plant species richness (i.e. indigenous and endemic species). Abiotic factors used as potential predictors included atoll area (km2), shoreline length (km), atoll elevation (m) and index of isolation (UNEP), but also the coastal index of the atoll ( Ic), the distance to the nearest similar atoll (km), the distance to the nearest large volcanic island ≥ 1000 km2 (here, Tahiti as a potential stepping-stone island) and the distance to the nearest raised atoll ≥ 15 m a.s.l. (here, Makatea or Henderson as a potential refugium during sea-level highstands). Spearman’s rank correlation, linear regression analysis and frequency diagrams were used to assess the relative influence of these factors on native species richness. No relationship was found between the species richness and the index of isolation or the distance to the nearest similar atoll. Atoll area and distance to the nearest raised atoll of Makatea explained 47.1% and 40%, respectively, of the native species richness variation observed on the remote atolls. The distance to the volcanic island of Tahiti and the coastal index explained 36.9% and 27.3% of the variation, while elevation and shoreline length explained 23.3% and 18.4% of the variation, respectively. Native species richness on the atolls surveyed increased with the increasing atoll area, elevation and shoreline length, but decreased with the increasing distance to the nearest raised atoll of Makatea and the large volcanic island of Tahiti. This supports the view that the spatial pattern of native species richness observed on the remote atolls was strongly influenced by (i) atoll area but also by (ii) the distance to the raised atoll of Makatea, and (iii) the distance to the volcanic island of Tahiti. This finding suggests that the raised atoll may be viewed as a refugium during sea-level highstands while the large volcanic island played the role of stepping-stone island, both islands influencing the dispersal of native species on remote atolls and attenuating the isolation effect in the study area.
APA, Harvard, Vancouver, ISO, and other styles
2

Rasheed, Shuaib, Simon C. Warder, Yves Plancherel, and Matthew D. Piggott. "Nearshore tsunami amplitudes across the Maldives archipelago due to worst-case seismic scenarios in the Indian Ocean." Natural Hazards and Earth System Sciences 24, no. 3 (March 5, 2024): 737–55. http://dx.doi.org/10.5194/nhess-24-737-2024.

Full text
Abstract:
Abstract. The Maldives face the threat of tsunamis from a multitude of sources. However, the limited availability of critical data, such as bathymetry (a recurrent problem for many island nations), has meant that the impact of these threats has not been studied at an island scale. Conducting studies of tsunami propagation at the island scale but across multiple atolls is also a challenging task due to the large domain and high resolution required for modelling. Here we use a high-resolution bathymetry dataset of the Maldives archipelago, as well as corresponding high numerical model resolution, to carry out a scenario-based tsunami hazard assessment for the entire Maldives archipelago to investigate the potential impact of plausible far-field tsunamis across the Indian Ocean at the nearshore island scales across the atolls. The results indicate that the bathymetry of the atolls, which are characterized by very steep boundaries offshore, is extremely efficient in absorbing and redirecting incoming tsunami waves. Results also highlight the importance that local effects have in modulating tsunami amplitude nearshore, including the location of the atoll in question, the location of a given island within the atoll, and the distance of that island to the reef, as well as a variety of other factors. We also find that the refraction and diffraction of tsunami waves within individual atolls contribute to the maximum tsunami amplitude patterns observed across the islands in the atolls. The findings from this study contribute to a better understanding of tsunamis across complex atoll systems and will help decision and policy makers in the Maldives assess the potential impact of tsunamis across individual islands. An online tool is provided which presents users with a simple interface, allowing the wider community to browse the simulation results presented here and assess the potential impact of tsunamis at the local scale.
APA, Harvard, Vancouver, ISO, and other styles
3

Kerber, Anne U., Thomas Vogt, and Cornelia S. L. Müller. "South Sea Atolls." American Journal of Dermatopathology 37, no. 11 (November 2015): 850–51. http://dx.doi.org/10.1097/dad.0000000000000337.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Droxler, André W., and Stéphan J. Jorry. "The Origin of Modern Atolls: Challenging Darwin's Deeply Ingrained Theory." Annual Review of Marine Science 13, no. 1 (January 3, 2021): 537–73. http://dx.doi.org/10.1146/annurev-marine-122414-034137.

Full text
Abstract:
In 1842, Darwin identified three types of reefs: fringing reefs, which are directly attached to volcanic islands; barrier reefs, which are separated from volcanic islands by lagoons; and ring reefs, which enclose only a lagoon and are defined as atolls. Moreover, he linked these reef types through an evolutionary model in which an atoll is the logical end point of a subsiding volcanic edifice, as he was unaware of Quaternary glaciations. As an alternative, starting in the 1930s, several authors proposed the antecedent karst model; in this model, atolls formed as a direct interaction between subsidence and karst dissolution that occurred preferentially in the bank interiors rather than on their margins through exposure during glacial lowstands of sea level. Atolls then developed during deglacial reflooding of the glacial karstic morphologies by preferential stacked coral-reef growth along their margins. Here, a comprehensive new model is proposed, based on the antecedent karst model and well-established sea-level fluctuations during the last 5 million years, by demonstrating that most modern atolls from the Maldives Archipelago and from the tropical Pacific and southwest Indian Oceans are rooted on top of late Pliocene flat-topped banks. The volcanic basement, therefore, has had no influence on the late Quaternary development of these flat-topped banks into modern atolls. During the multiple glacial sea-level lowstands that intensified throughout the Quaternary, the tops of these banks were karstified; then, during each of the five mid-to-late Brunhes deglaciations, coral reoccupied their raised margins and grew vertically, keeping up with sea-level rise and creating the modern atolls.
APA, Harvard, Vancouver, ISO, and other styles
5

Bruyère, Oriane, Romain Le Gendre, Mathilde Chauveau, Bertrand Bourgeois, David Varillon, John Butscher, Thomas Trophime, et al. "Lagoon hydrodynamics of pearl farming atolls: the case of Raroia, Takapoto, Apataki and Takaroa (French Polynesia)." Earth System Science Data 15, no. 12 (December 8, 2023): 5553–73. http://dx.doi.org/10.5194/essd-15-5553-2023.

Full text
Abstract:
Abstract. Between 2018 and 2022, four pearl farming Tuamotu atolls of French Polynesia were monitored with autonomous oceanographic instruments to measure the hydrodynamics of atoll lagoons and the ocean–lagoon water exchanges. These surveys were conducted within the framework of the ANR-funded MANA (Management of Atolls) project and its extensions to additional sites. The overarching goal was to improve knowledge on the processes influencing the spat collection of the pearl oyster Pinctada margaritifera, the oyster species used to produce black pearls. These data sets are also critical for the calibration and validation of 3D high spatial resolution hydrodynamic models used to study oyster larval dispersal within lagoons. The observational strategies focused on the characterization of ocean–lagoon exchanges through passes and hoa (i.e., shallow reef flats), lagoon circulation, incident waves breaking on the forereef, water elevation inside the lagoon as well as spatial temperature variability. Chronologically, the investigated atolls were first Raroia Atoll with 9 months of measurements between May 2018 and March 2019 during which the MALIS1 and MALIS2 cruises on-board the R/V ALIS took place. It was followed by a 4 month deployment in Takapoto Atoll (November 2021 to March 2022). In late April 2022, Apataki Atoll was instrumented until end of July, followed by Takaroa measurements between July and October 2022. Apataki (Leg2) and Takaroa Atoll were conjointly instrumented during the MALIS 3 oceanographic cruise. Altogether, those multi-atoll data bring a worldwide unique oceanographic atoll data set that is useful for addressing local pearl farming questions but potentially beneficial for other fundamental and applied investigations. Each data set was post-processed, quality controlled and converted into NetCDF format. Files are available in open source into dedicated repositories in the SEANOE marine data platform. Links (DOI) of individual data sets are provided in Table 2.
APA, Harvard, Vancouver, ISO, and other styles
6

Gaulme, François. "Les atolls du Pacifique." Études Juillet-Août, no. 7 (2017): 7. http://dx.doi.org/10.3917/etu.4240.0007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Martin, Tyson S. H., Rod M. Connolly, Andrew D. Olds, Daniela M. Ceccarelli, Douglas E. Fenner, Thomas A. Schlacher, and Maria Beger. "Subsistence harvesting by a small community does not substantially compromise coral reef fish assemblages." ICES Journal of Marine Science 74, no. 8 (March 28, 2017): 2191–200. http://dx.doi.org/10.1093/icesjms/fsx043.

Full text
Abstract:
Abstract Fisheries usually first remove large predators before switching to smaller species, causing lasting changes to fish community structure. Reef fish provide essential protein and income for many people, and the impacts of commercial and high-intensity subsistence fishing on reef fish are well documented. However, how fish communities respond to low levels of subsistence fishing using traditional techniques (fishing for food, few fishers) is less well understood. We use three atolls in the Marshall Islands as a model system to quantify effects of commercial and subsistence fishing on reef fish communities, compared to a near-pristine baseline. Unexpectedly, fish biomass was highest on the commercially-fished atoll where the assemblage was dominated by herbivores (50% higher than other atolls) and contained few top predators (70% lower than other atolls). By contrast, fish biomass and trophic composition did not differ between pristine and subsistence-fished atolls – top predators were abundant on both. We show that in some cases, reefs can support fishing by small communities to provide food but still retain intact fish assemblages. Low-intensity subsistence fishing may not always harm marine food webs, and we suggest that its effects depend on the style and intensity of fishing practised and the type of organisms targeted.
APA, Harvard, Vancouver, ISO, and other styles
8

Poteate, Aaron S., Scott M. Fitzpatrick, William S. Ayres, and Adam Thompson. "First Radiocarbon Chronology for Mwoakilloa (Mokil) Atoll, Eastern Caroline Islands, Micronesia." Radiocarbon 58, no. 1 (January 19, 2016): 169–78. http://dx.doi.org/10.1017/rdc.2015.16.

Full text
Abstract:
AbstractGiven their sheer number and evidence for long-term prehistoric occupation, atolls occupy a unique position in the peopling of the Pacific. However, they have frequently been overlooked in favor of larger islands due to a host of logistical and other issues. Once viewed as marginal environments, current research is now showing that small islands like these may have been more attractive to settlers than once thought. A new research program in Micronesia is dedicated to examining atolls to better develop baseline chronologies and investigate long-term human adaptations. As part of the initial stage of the project, we present the first radiocarbon dates (n=10) from Mwoakilloa (Mokil) atoll, which support a continuous occupation beginning between 1700–1560 cal BP (2σ). When compared to the settlement of other atoll groups in Micronesia such as the Marshall Islands—along with the nearby high volcanic islands of Pohnpei and Kosrae at approximately 2000–1800 yr ago—the dates from Mwoakilloa suggest a nearly contemporaneous or only slightly later occupation. The recovery of faunal material also demonstrates the translocation of at least two animals (Pacific rat and dog) to the island by humans that was coeval with early settlement. Additionally, there is evidence of landscape transformation in the form of a relatively large artificial mound created by debris and platform accumulation unseen elsewhere in central-eastern Micronesia, but common to atolls. These new dates reinforce the notion that Mwoakilloa and other atolls are integral to understanding prehistoric adaptations across the vast Pacific, though many questions still remain such as to the degree of interaction that occurred with nearby islands and whether settlement was continuous or intermittent through time.
APA, Harvard, Vancouver, ISO, and other styles
9

Dale, Jonathan J., Carl G. Meyer, and Christian E. Clark. "The Ecology of Coral Reef Top Predators in the Papahānaumokuākea Marine National Monument." Journal of Marine Biology 2011 (2011): 1–14. http://dx.doi.org/10.1155/2011/725602.

Full text
Abstract:
Coral reef habitats in the Papahānaumokuākea Marine National Monument (PMNM) are characterized by abundant top-level predators such as sharks and jacks. The predator assemblage is dominated both numerically and in biomass by giant trevally (Caranx ignobilis) and Galapagos sharks (Carcharhinus galapagensis). A lower diversity of predatory teleosts, particularly groupers and snappers, distinguishes the PMNM from other remote, unfished atolls in the Pacific. Most coral reef top predators are site attached to a “home” atoll, but move extensively within these atolls. Abundances of the most common sharks and jacks are highest in atoll fore reef habitats. Top predators within the PMNM forage on a diverse range of prey and exert top-down control over shallow-water reef fish assemblages. Ecological models suggest ecosystem processes may be most impacted by top predators through indirect effects of predation. Knowledge gaps are identified to guide future studies of top predators in the PMNM.
APA, Harvard, Vancouver, ISO, and other styles
10

Orpin, Alan R., Graham J. Rickard, Peter K. Gerring, and Geoffroy Lamarche. "Tsunami hazard potential for the equatorial southwestern Pacific atolls of Tokelau from scenario-based simulations." Natural Hazards and Earth System Sciences 16, no. 5 (May 31, 2016): 1239–57. http://dx.doi.org/10.5194/nhess-16-1239-2016.

Full text
Abstract:
Abstract. Devastating tsunami over the last decade have significantly heightened awareness of the potential consequences and vulnerability of low-lying Pacific islands and coastal regions. Our appraisal of the potential tsunami hazard for the atolls of the Tokelau Islands is based on a tsunami source–propagation–inundation model using Gerris Flow Solver, adapted from the companion study by Lamarche et al. (2015) for the islands of Wallis and Futuna. We assess whether there is potential for tsunami flooding on any of the village islets from a selection of 14 earthquake-source experiments. These earthquake sources are primarily based on the largest Pacific earthquakes of Mw ≥ 8.1 since 1950 and other large credible sources of tsunami that may impact Tokelau. Earthquake-source location and moment magnitude are related to tsunami-wave amplitudes and tsunami flood depths simulated for each of the three atolls of Tokelau. This approach yields instructive results for a community advisory but is not intended to be fully deterministic. Rather, the underlying aim is to identify credible sources that present the greatest potential to trigger an emergency response. Results from our modelling show that wave fields are channelled by the bathymetry of the Pacific basin in such a way that the swathes of the highest waves sweep immediately northeast of the Tokelau Islands. Our limited simulations suggest that trans-Pacific tsunami from distant earthquake sources to the north of Tokelau pose the most significant inundation threat. In particular, our assumed worst-case scenario for the Kuril Trench generated maximum modelled-wave amplitudes in excess of 1 m, which may last a few hours and include several wave trains. Other sources can impact specific sectors of the atolls, particularly distant earthquakes from Chile and Peru, and regional earthquake sources to the south. Flooding is dependent on the wave orientation and direct alignment to the incoming tsunami. Our "worst-case" tsunami simulations of the Tokelau Islands suggest that dry areas remain around the villages, which are typically built on a high islet. Consistent with the oral history of little or no perceived tsunami threat, simulations from the recent Tohoku and Chile earthquake sources suggest only limited flooding around low-lying islets of the atoll. Where potential tsunami flooding is inferred from the modelling, recommended minimum evacuation heights above local sea level are compiled, with particular attention paid to variations in tsunami flood depth around the atolls, subdivided into directional quadrants around each atoll. However, complex wave behaviours around the atolls, islets, tidal channels and within the lagoons are also observed in our simulations. Wave amplitudes within the lagoons may exceed 50 cm, increasing any inundation and potential hazards on the inner shoreline of the atolls, which in turn may influence evacuation strategies. Our study shows that indicative simulation studies can be achieved even with only basic field information. In part, this is due to the spatially and vertically limited topography of the atoll, short reef flat and steep seaward bathymetry, and the simple depth profile of the lagoon bathymetry.
APA, Harvard, Vancouver, ISO, and other styles
11

Harris, Matthew, and Marshall Weisler. "Intertidal Foraging on Atolls: Prehistoric Forager Decision-Making at Ebon Atoll, Marshall Islands." Journal of Island and Coastal Archaeology 12, no. 2 (April 14, 2016): 200–223. http://dx.doi.org/10.1080/15564894.2016.1167140.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Abella, Maveric K. I. L., Monica Rouco Molina, Ivana Nikolić-Hughes, Emlyn W. Hughes, and Malvin A. Ruderman. "Background gamma radiation and soil activity measurements in the northern Marshall Islands." Proceedings of the National Academy of Sciences 116, no. 31 (July 15, 2019): 15425–34. http://dx.doi.org/10.1073/pnas.1903421116.

Full text
Abstract:
We report on measurements of external gamma radiation on 9 islands in 4 atolls in the northern Marshall Islands, all of which were affected by the US nuclear testing program from 1946 to 1958 (Enjebi, Ikuren, and Japtan in Enewetak Atoll; Bikini and Enyu in Bikini Atoll; Naen in Rongelap Atoll; and Aon, Elluk, and Utirik in Utirik Atoll). We also report americium-241, cesium-137, plutonium-238, and plutonium-239,240 activity concentrations in the soil samples for 11 islands in 4 northern atolls (Enewetak, Japtan, Medren, and Runit in Enewetak Atoll; Bikini and Enyu in Bikini Atoll; Naen and Rongelap in Rongelap Atoll; and Aon, Elluk, and Utirik in Utirik Atoll) and from Majuro Island, Majuro Atoll in the southern Marshall Islands. Our results show low external gamma radiation levels on some islands in the Enewetak Atoll and Utirik Atoll, and elevated levels on Enjebi Island in the Enewetak Atoll, on Bikini Atoll, and on Naen Island in the Rongelap Atoll. We perform ordinary kriging on external gamma radiation measurements to provide interpolated maps. We find that radionuclides are absent from all Majuro soil samples, and that they are present at highest activity concentrations in samples from Runit and Enjebi islands (Enewetak Atoll), Bikini Island (Bikini Atoll), and Naen Island (Rongelap Atoll). We contextualize all results by making comparisons between islands and to various standards, as well as to regions of the world affected by nuclear accidents. We also discuss implications for informed decision-making by the Marshallese and local atoll governments and their people on issues pertaining to island resettlement.
APA, Harvard, Vancouver, ISO, and other styles
13

Nullet, Dennis. "WATER BALANCE OF PACIFIC ATOLLS." Journal of the American Water Resources Association 23, no. 6 (December 1987): 1125–32. http://dx.doi.org/10.1111/j.1752-1688.1987.tb00864.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Collen, John. "<i>Recolonization of reef flat by larger foraminifera, Funafuti, Tuvalu</i>." Journal of Micropalaeontology 15, no. 2 (October 1, 1996): 130. http://dx.doi.org/10.1144/jm.15.2.130.

Full text
Abstract:
Abstract. The ecology of the larger foraminifera is poorly known for western Pacific atolls, despite the importance of these species to the sediment budgets of the atolls. Many beaches and islets (motu) are composed largely of foraminiferal tests derived from reef flat communities; however, populations of larger foraminifera are often under threat or may even have been eliminated by the effects of pollution and development of the reef flats. It is therefore important to understand the rates of response of foraminiferal populations to natural and human changes to their environments.This note reports some observations arising from studies of foraminifera and sedimentation on Funafuti Atoll in the south-central Tuvalu Group, west central Pacific Ocean, at latitude 8°30′S and longitude 179°12′E. The atoll consists of some 39 small islets surrounding a c. 200 km2 lagoon up to 55 m deep (Smith &amp; Woodward, 1992), with reef flats up to several hundred metres wide surrounding the islets on both ocean and lagoon sides.Foraminiferal faunas in the lagoon and on the reef flats are diverse, and include some 8 species of larger foraminifera. Although they do not usually make up more than 40% of the reef flat sediments, because of various concentrating processes, tests of the larger foraminifera (particularly Baculogypsina sphaerulata and Amphistegina lobifera) comprise up to 80% of the sediments forming the main island Fongafale. This foraminiferal component may be even higher for the sands of other atolls, and its significance to the carbonate sediment budget and to problems of coastal erosion. . .
APA, Harvard, Vancouver, ISO, and other styles
15

Rasheed, Shuaib, Simon C. Warder, Yves Plancherel, and Matthew D. Piggott. "Response of tidal flow regime and sediment transport in North Malé Atoll, Maldives, to coastal modification and sea level rise." Ocean Science 17, no. 1 (February 17, 2021): 319–34. http://dx.doi.org/10.5194/os-17-319-2021.

Full text
Abstract:
Abstract. Changes to coastlines and bathymetry alter tidal dynamics and associated sediment transport processes, impacting upon a number of threats facing coastal regions, including flood risk and erosion. Especially vulnerable are coral atolls such as those that make up the Maldives archipelago, which has undergone significant land reclamation in recent years and decades and is also particularly exposed to sea level rise. Here we develop a tidal model of Malé Atoll, Maldives, the first atoll-scale and multi-atoll-scale high-resolution numerical model of the atolls of the Maldives and use it to assess potential changes to sediment grain size distributions in the deeper atoll basin, under sea level rise and coastline alteration scenarios. The results indicate that the impact of coastline modification over the last two decades at the island scale is not limited to the immediate vicinity of the modified island but can also significantly impact the sediment grain size distribution across the wider atoll basin. Additionally, the degree of change in sediment distribution which can be associated with sea level rise that is projected to occur over relatively long time periods is predicted to occur over far shorter time periods with coastline changes, highlighting the need to better understand, predict and mitigate the impact of land reclamation and other coastal modifications before conducting such activities.
APA, Harvard, Vancouver, ISO, and other styles
16

Orpin, A. R., G. J. Rickard, P. K. Gerring, and G. Lamarche. "Tsunami hazard potential for the equatorial southwestern Pacific atolls of Tokelau from scenario-based simulations." Natural Hazards and Earth System Sciences Discussions 3, no. 7 (July 30, 2015): 4391–433. http://dx.doi.org/10.5194/nhessd-3-4391-2015.

Full text
Abstract:
Abstract. Devastating tsunami over the last decade have significantly heightened awareness of the potential consequences and vulnerability to tsunami for low-lying Pacific islands and coastal regions. Our tsunami risk assessment for the atolls of the Tokelau Islands was based on a tsunami source–propagation–inundation model using Gerris Flow Solver, adapted from the companion study by Lamarche et al. (2015) for the islands of Wallis and Futuna. We assess whether there is potential for tsunami flooding on any of the village islets from a series of fourteen earthquake-source experiments that apply a combination of well-established fault parameters to represent plausible "high-risk scenarios" for each of the tsunamigenic sources. Earthquake source location and moment magnitude were related to tsunami wave heights and tsunami flood depths simulated for each of the three atolls of Tokelau. This approach was adopted to yield indicative and instructive results for a community advisory, rather than being fully deterministic. Results from our modelling show that wave fields are channelled by the bathymetry of the Pacific basin in such a way that the swathes of the highest waves sweep immediately northeast of the Tokelau Islands. From our series of limited simulations a great earthquake from the Kuril Trench poses the most significant inundation threat to Tokelau, with maximum modelled-wave heights in excess of 1 m, which may last a few hours and include several wave trains. Other sources can impact specific sectors of the atolls, particularly from regional sources to the south, and northern and eastern distant sources that generate trans-Pacific tsunami. In many cases impacts are dependent on the wave orientation and direct exposure to the oncoming tsunami. This study shows that dry areas remain around the villages in nearly all our "worst-case" tsunami simulations of the Tokelau Islands. Consistent with the oral history of little or no perceived tsunami threat, simulations from the recent Tohoku and Chile earthquake sources suggest only limited flooding. Where potential tsunami flooding was inferred from the modelling, recommended minimum evacuation heights above local sea level were compiled, with particular attention paid to variations in tsunami flood depth, subdivided into directional quadrants around each atoll. But complex wave behaviours around the atolls, islets, tidal channels and lagoons were also observed in our simulations. Wave amplitudes within the lagoons may exceed 50 cm, increasing any inundation and risks on the inner shoreline of the atolls, which may influence evacuation strategies. Our study shows that indicative, but instructive, simulation studies can be achieved even with only basic field information, due in part to the relative simplicity of the atoll topography and bathymetry.
APA, Harvard, Vancouver, ISO, and other styles
17

Hobbs, Jean-Paul A., and Stephen J. Newman. "Darwin’s atolls revisited: lagoon infilling and closure has ecological consequences to North Keeling Atoll." Marine Biodiversity 46, no. 1 (May 5, 2015): 21–22. http://dx.doi.org/10.1007/s12526-015-0345-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Bailey-Brock, Julie H., Wagner F. Magalhães, and Richard E. Brock. "Coral reef inhabiting tubeworms (Polychaeta: Serpulidae) from Enewetak, Kwajalein, Rongelap and Utirik Atolls, Marshall Islands." Journal of the Marine Biological Association of the United Kingdom 92, no. 5 (February 6, 2012): 967–88. http://dx.doi.org/10.1017/s0025315411001950.

Full text
Abstract:
The coral reef inhabiting tubeworms from the Marshall Islands have been studied by few authors mainly by samplings in Enewetak Atoll. We report several new records of serpuline and spirorbine tubeworms from Enewetak Atoll as well as from Kwajalein, Utirik and Rongelap Atolls. Twenty-one species of Serpulinae and seven species of Spirorbinae are described and illustrated with line drawings, colour and/or scanning electron microscopy photographs.Neodexiospira turritanom. nov. is proposed to replaceNeodexiospira preacuta. Enewetak Atoll still represents the most species-rich atoll in the Marshall Islands but this is most likely the result of a greater sampling effort in this atoll for the last few decades.
APA, Harvard, Vancouver, ISO, and other styles
19

Zhao, Zhuangming, Yu Yan, Shibin Qi, Shuaishuai Liu, Zhonghan Chen, and Jing Yang. "Cyclonic and Anticyclonic Asymmetry of Reef and Atoll Wakes in the Xisha Archipelago." Atmosphere 13, no. 10 (October 21, 2022): 1740. http://dx.doi.org/10.3390/atmos13101740.

Full text
Abstract:
A high-resolution (∼500 m) numerical model was used to study the reef and atoll wakes in the Xisha Archipelago (XA) during 2009. Statistical analyses of simulation data indicated strong cyclonic dominance in the mixing layer (above ∼35 m) and weak anticyclonic dominance in the subsurface layer (35∼160 m) for both eddies and filaments in the XA. The intrinsic dynamical properties of the flow, such as the vertical stratification and velocity magnitude, and the terrain of reefs and atolls had a significant effect on the asymmetry. Without considering the existence of reefs and atolls, the “background cyclonic dominance” generated under local planetary rotation (f≈4.1×10−5 s−1) and vertical stratification (with mean Brunt–Väisälä frequency N = 0.02 s−1 at 75 m) was stronger for filaments than eddies in the upper layer from 0∼200 m, and the larger vorticity amplitude in the cyclonic filaments could greatly enhance the cyclonic wake eddies. Furthermore, inertial–centrifugal instability induced selective destabilization of anticyclonic wake eddies in different water layers. As the Rossby number (Ro) and core vorticity (Burger number, Bu) decreased (increased) with the water depth, a more stable state was achieved for the anticyclonic wake eddies in the deeper layer. The stratification and slipping reefs and atolls also led to vertical decoupled shedding, which intensified the asymmetry.
APA, Harvard, Vancouver, ISO, and other styles
20

Letessier, TB, MJ Cox, JJ Meeuwig, PH Boersch-Supan, and AS Brierley. "Enhanced pelagic biomass around coral atolls." Marine Ecology Progress Series 546 (March 21, 2016): 271–76. http://dx.doi.org/10.3354/meps11675.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Christophers, B. E. "FREDERIC WOOD JONES: CORAL AND ATOLLS." ANZ Journal of Surgery 65, no. 10 (October 1995): 749–60. http://dx.doi.org/10.1111/j.1445-2197.1995.tb00552.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Capune, William K. "JIN SHIANG FA CASE STUDY: WHAT COULD HAVE BEEN DONE?" International Oil Spill Conference Proceedings 1995, no. 1 (February 1, 1995): 1017–18. http://dx.doi.org/10.7901/2169-3358-1995-1-1017.

Full text
Abstract:
ABSTRACT On October 14, 1993, the fishing vessel Jin Shiang Fa grounded at Rose Atoll with 100,000 gallons of fuel on board. Rose Atoll is one of the most pristine atolls in the world. Due to its extreme remoteness, responders had very limited options and were unable to recover any fuel. Six weeks after the grounding, a salvage vessel arrived on scene and found the Jin Shiang Fa completely destroyed by a storm, and a third of the reef dead. No response expense was spared. Yet no fuel was ever recovered. When traditional response methods are not feasible, alternative options should be considered.
APA, Harvard, Vancouver, ISO, and other styles
23

Weisler, Marshall I. "Atolls as settlement landscapes: Ujae, Marshall Islands." Atoll Research Bulletin 460 (1999): 1–51. http://dx.doi.org/10.5479/si.00775630.460.1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Kornicker, Louis S. "Myodocopid Ostracoda of Enewetak and Bikini Atolls." Smithsonian Contributions to Zoology, no. 505 (1991): 1–140. http://dx.doi.org/10.5479/si.00810282.505.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Van Dyke, Jon M. "Protected marine areas and low-lying atolls." Ocean and Shoreline Management 16, no. 2 (January 1991): 87–160. http://dx.doi.org/10.1016/0951-8312(91)90001-i.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Elston, C., PD Cowley, RG von Brandis, and J. Lea. "Residency and habitat use patterns by sympatric stingrays at a remote atoll in the Western Indian Ocean." Marine Ecology Progress Series 662 (March 18, 2021): 97–114. http://dx.doi.org/10.3354/meps13632.

Full text
Abstract:
Information on the spatial ecology of batoids is lacking despite the need for this information for effective management and conservation of this vulnerable faunal group. We used acoustic telemetry to monitor the presence of dasyatids (Pastinachus ater, Urogymnus granulatus, and U. asperrimus) from March 2014 to November 2017 within and around the isolated St. Joseph Atoll, Seychelles. Results highlighted residency (median residency index = 0.75 and 0.57 for P. ater and U. granulatus) over periods of months to years for both juveniles and adults. Individuals displayed highly restricted movements; most detections occurred within 1 km of tagging locations, and movement networks were small and fragmented. However, juveniles increased their range of movements with size before dispersing to various locations on the Amirantes Bank. Within the atoll, resident adults and juveniles segregated ontogenetically by habitat; adults were more reliant on the deeper lagoon, while juveniles were largely restricted to the shallow sand flats, likely in an effort to avoid predators. Conversely, no inter-specific space partitioning was identified. This study provides preliminary evidence that this atoll is a dasyatid nursery; however, comparative research at other atolls is required to understand the role that atolls may play as batoid nurseries. This study was performed in the South West Indian Ocean, an understudied fisheries conservation hotspot where biodiversity is high but management effectiveness is low. The identification of a dasyatid refuge in this region highlights that the current marine protected area designation will likely provide conservation benefits for the dasyatid populations across the entire Amirantes Bank.
APA, Harvard, Vancouver, ISO, and other styles
27

White, Ian, Tony Falkland, and Farran Redfern. "Ocean Surface Warming and Long-Term Variability in Rainfall in Equatorial Pacific Atolls." Atmosphere 15, no. 6 (May 31, 2024): 666. http://dx.doi.org/10.3390/atmos15060666.

Full text
Abstract:
Freshwater availability in Pacific equatorial atolls is highly variable because of the influence of El Niño–Southern Oscillation (ENSO) on rainfall. IPCC projections for the central and western tropical Pacific suggest annual rainfall (Pa) will increase as sea surface temperature (SST) rises. Future changes in ENSO frequency and intensity and in hydrological droughts, however, are uncertain. Here, trends in monthly, seasonal, annual, annual maximum, and minimum rainfall in two equatorial atolls in the eastern and central tropical Pacific are compared with trends in the SST of the surrounding Nino regions from 1951 to 2023. Significant increasing trends in the warm season, annual, and annual maximum SST in the Nino1 + 2, Nino3, and Nino4 regions were of order +1.0 °C/100 y. There were no significant trends in the cool season or annual minimum SST. Despite ocean warming, there were no significant trends in atoll Pa, in intra-annual or interannual variability over 7 decades for either SST or Pa, or in the relative strengths of warm/cool and wet/dry seasons. Extreme, large Pa only occurred after 1987, indicative of ocean warming. Extreme, small Pa happened throughout the period, suggesting no change in drought frequency. Correlations between 12-month P and SST were very strong, with historic rates of increases in Pa of around 1200 mm/y/°C, consistent with projections. The results indicate that the recharge of atoll groundwater will increase as oceans warm, but droughts will remain a major challenge.
APA, Harvard, Vancouver, ISO, and other styles
28

Parker, Albert, and Clifford Ollier. "Pacific Sea Levels Rising Very Slowly and Not Accelerating." Quaestiones Geographicae 38, no. 1 (March 29, 2019): 179–84. http://dx.doi.org/10.2478/quageo-2019-0007.

Full text
Abstract:
AbstractOver the past decades, detailed surveys of the Pacific Ocean atoll islands show no sign of drowning because of accelerated sea-level rise. Data reveal that no atoll lost land area, 88.6% of islands were either stable or increased in area, and only 11.4% of islands contracted. The Pacific Atolls are not being inundated because the sea level is rising much less than was thought. The average relative rate of rise and acceleration of the 29 long-term-trend (LTT) tide gauges of Japan, Oceania and West Coast of North America, are both negative, −0.02139 mm yr−1and −0.00007 mm yr−2respectively. Since the start of the 1900s, the sea levels of the Pacific Ocean have been remarkably stable.
APA, Harvard, Vancouver, ISO, and other styles
29

McDermid, K. J., L. M. Hodgson, and I. A. Abbott. "119 Marine Algae of Pohnpei and Ant Atoll with Comparisons to Other Pacific Atolls and Island Groups." Journal of Phycology 39, s1 (June 2003): 41. http://dx.doi.org/10.1111/j.0022-3646.2003.03906001_119.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

WYNN, ADDISON H., ROBERT P. REYNOLDS, DONALD W. BUDEN, MARJORIE FALANRUW, and BRIAN LYNCH. "The unexpected discovery of blind snakes (Serpentes: Typhlopidae) in Micronesia: two new species of Ramphotyphlops from the Caroline Islands." Zootaxa 3172, no. 1 (January 25, 2012): 39. http://dx.doi.org/10.11646/zootaxa.3172.1.3.

Full text
Abstract:
Two new blind snakes in the genus Ramphotyphlops are described from Ulithi (R. hatmaliyeb sp. nov.) and Ant Atoll (R.adocetus sp. nov.) in the Caroline Islands, the first blind snake species known from Micronesia east of Palau (excludingRamphotyphlops braminus). Both species are unusual in being known only from small, low-lying atolls. They can be dis-tinguished from other Ramphotyphlops by the combination of 22 scale rows over the length of the body; a wedge-shaped snout, without a keratinized keel; and a broad, pyriform (R. adocetus) or ovate (R. hatmaliyeb) rostral scale.
APA, Harvard, Vancouver, ISO, and other styles
31

Goldberg, Walter M. "Atolls of the World: Revisiting the Original Checklist." Atoll Research Bulletin, no. 610 (June 28, 2016): 1–47. http://dx.doi.org/10.5479/si.0077-5630.610.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Volker, Raymond E., Miguel A. Mariño, and Dennis E. Rolston. "Transition Zone Width in Ground Wateron Ocean Atolls." Journal of Hydraulic Engineering 111, no. 4 (April 1985): 659–76. http://dx.doi.org/10.1061/(asce)0733-9429(1985)111:4(659).

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Sarchet, Penny. "Sea level's toll on atolls isn't that bad." New Scientist 226, no. 3024 (June 2015): 14. http://dx.doi.org/10.1016/s0262-4079(15)30501-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Povinec, Pavel P., Dennis Woodhead, Paul Blowers, Rachel Bonfield, Malcolm Cooper, Quingjiang Chen, Henning Dahlgaard, et al. "Marine radioactivity assessment of Mururoa and Fangataufa atolls." Science of The Total Environment 237-238 (September 1999): 249–67. http://dx.doi.org/10.1016/s0048-9697(99)00140-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Buesseler, Ken O., Matthew A. Charette, Steven M. Pike, Paul B. Henderson, and Lauren E. Kipp. "Lingering radioactivity at the Bikini and Enewetak Atolls." Science of The Total Environment 621 (April 2018): 1185–98. http://dx.doi.org/10.1016/j.scitotenv.2017.10.109.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Krausse, G. H. "Sustainable tourism for remote atolls in the Pacific." International Journal of Sustainable Development & World Ecology 2, no. 3 (September 1995): 166–81. http://dx.doi.org/10.1080/13504509509469898.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

SALVAT, Bernard. "Dominant benthic mollusks in closed atolls, French Polynesia." Galaxea, Journal of Coral Reef Studies 11, no. 2 (2009): 197–206. http://dx.doi.org/10.3755/galaxea.11.197.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Hunt, Colin. "Property rights and environmental management on Pacific atolls." International Journal of Social Economics 23, no. 4/5/6 (April 1996): 221–34. http://dx.doi.org/10.1108/03068299610121813.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

White, Ian, Tony Falkland, Pascal Perez, Anne Dray, Taboia Metutera, Eita Metai, and Marc Overmars. "Challenges in freshwater management in low coral atolls." Journal of Cleaner Production 15, no. 16 (November 2007): 1522–28. http://dx.doi.org/10.1016/j.jclepro.2006.07.051.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Dickinson, William R. "Holocene Sea-Level Record on Funafuti and Potential Impact of Global Warming on Central Pacific Atolls." Quaternary Research 51, no. 2 (March 1999): 124–32. http://dx.doi.org/10.1006/qres.1998.2029.

Full text
Abstract:
AbstractGeomorphic features inherited from the mid-Holocene glacio-hydro-isostatic sea-level highstand that affected the central Pacific region influence the susceptibility of atoll islets to potentially enhanced wave erosion associated with rise in sea level from global warming. Shoreline morphology on multiple islets of Funafuti atoll in central Tuvalu reflects a relative mid-Holocene sea-level highstand 2.2–2.4 m above modern sea level. Typical islets are composed of unconsolidated post-mid-Holocene sediment resting disconformably on cemented coral rubble formed beneath now-emergent mid-Holocene reef flats. Exposed remnants of the lithified islet foundations serve as resistant buttresses protecting the flanks of atoll islets from wave attack. Islets lacking cemented mid-Holocene deposits as part of their internal structure are migratory sand cays with unstable shorelines. Any future sea-level rise ≥0.75 m, bringing high tide above the elevation of mid-Holocene low tide, might trigger enhanced wave erosion of stable atoll islets by overtopping the indurated mid-Holocene reef platforms. As analogous threshold relations are inferred for other central Pacific atolls, the risk of future inundation of island nations cannot be evaluated solely in terms of expected sea-level rise with respect to gross islet elevations.
APA, Harvard, Vancouver, ISO, and other styles
41

RIAUX-GOBIN, CATHERINE, ANDRZEJ WITKOWSKI, RICHARD W. JORDAN, VALERIANO PARRAVICINI, and SERGE PLANES. "Cocconeis kurakakea, a new diatom species from Nukutavake (Tuamotu Archipelago, South Pacific): description and comparison with C. diruptoides and C. pseudodiruptoides." Phytotaxa 349, no. 2 (May 11, 2018): 115. http://dx.doi.org/10.11646/phytotaxa.349.2.2.

Full text
Abstract:
During the ‘Tara Pacific 2016–2018 Expedition’, marine benthic diatom samples were collected from several Tuamotu atolls in the South Pacific. Preparation and examination of these samples were conducted following standard methods including light and scanning electron microscopy. A small-celled taxon from the genus Cocconeis Ehrenb. (Bacillariophyceae) is described from the Nukutavake reef, and compared to several other taxa for which the definition is not always clear (e.g., Cocconeis diruptoides Hust. and Cocconeis pseudodiruptoides Foged). The new taxon is present only on one of the investigated Tuamotu atolls, possibly indicating local endemism.
APA, Harvard, Vancouver, ISO, and other styles
42

Badeeu, Fathimath, Aminath Nafiz, and Aishath Muneeza. "Developing Regional Healthcare Facilities in Maldives through Mudharabah Perpetual Sukuk." International Journal of Management and Applied Research 6, no. 2 (August 8, 2019): 81–96. http://dx.doi.org/10.18646/2056.62.19-006.

Full text
Abstract:
The purpose of this paper is to identify the underlying issues of healthcare system in Maldives in order to provide an understanding of the challenges facing healthcare providers in islands and atolls in a wider context. The paper scrutinizes the financial burden faced by the current healthcare system in Maldives. It also proposes shariah compliant mechanism that can be utilized to minimize financial burden in a long-term basis. It is hoped that the outcome of the research will assist the policymakers of Maldives to devise a shariah compliant mechanism to finance the development of atoll and island health facilities in a sustainable manner.
APA, Harvard, Vancouver, ISO, and other styles
43

Trichet, Jean, Christine Hatté, and Michel Fontugne. "Radiocarbon Dating of Recent Intertidal Microbial Mats on Atoll Rims." Radiocarbon 55, no. 3 (2013): 1603–16. http://dx.doi.org/10.1017/s0033822200048529.

Full text
Abstract:
Microbial mats (koparain Polynesian) that develop in shallow brackish to hypersaline ponds on the rims of atolls were investigated for their accumulation process and rate. Two sequences of ∼30-cm-deep kopara, composed of 7 and 5 layers distinguished by their colors and sedimentological facies were collected in 1996 from the Tetiaroa atoll, French Polynesia. The combination of radiocarbon activity measurements on both organic and carbonate constituents, reservoir effect estimation, and comparison with the Southern Hemisphere atmospheric bomb-peak14C record allowed us to establish a fine chronology of the layer successions documenting the mode of formation, erosion, and restoration of these microbial mat deposits.
APA, Harvard, Vancouver, ISO, and other styles
44

Buddemeier. "CLIMATE AND GROUNDWATER RESOURCES ON ATOLLS AND SMALL ISLANDS." Weather and Climate 12, no. 1 (1992): 9. http://dx.doi.org/10.2307/44279827.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Schreiber, Elizabeth Anne, and Ralph W. Schreiber. "Great Frigatebird Size Dimorphism on Two Central Pacific Atolls." Condor 90, no. 1 (February 1988): 90–99. http://dx.doi.org/10.2307/1368437.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

White, Ian, Tony Falkland, Taboia Metutera, Eita Metai, Marc Overmars, Pascal Perez, and Anne Dray. "Climatic and Human Influences on Groundwater in Low Atolls." Vadose Zone Journal 6, no. 3 (August 2007): 581–90. http://dx.doi.org/10.2136/vzj2006.0092.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Chazine, Jean-Michel. "De la théorie aux pratiques culturales sur les atolls..." Journal de la société des océanistes, no. 114-115 (December 1, 2002): 63–69. http://dx.doi.org/10.4000/jso.1390.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Rapaport, Moshe. "Population pressure on coral atolls: trends and approaching limits." Atoll Research Bulletin 340 (1990): 1–33. http://dx.doi.org/10.5479/si.00775630.340.1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Barry, S. J., P. J. Cowell, and C. D. Woodroffe. "A morphodynamic model of reef-island development on atolls." Sedimentary Geology 197, no. 1-2 (April 2007): 47–63. http://dx.doi.org/10.1016/j.sedgeo.2006.08.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Woodroffe, Colin, and Roger McLean. "Microatolls and recent sea level change on coral atolls." Nature 344, no. 6266 (April 1990): 531–34. http://dx.doi.org/10.1038/344531a0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Atolls' for other source types:
Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography