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Journal articles on the topic 'Intertidal zone'
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Salmanu, Sriyanti. "KEANEKARAGAMAN GASTROPODA PADA ZONA INTERTIDAL TENGAH (MIDLE INTERTIDAL ZONE) DAN ZONA INTERTIDAL BAWAH (LOWER INTERTIDAL ZONE) DAERAH PADANG LAMUN DESA WAAI." BIOPENDIX: Jurnal Biologi, Pendidikan dan Terapan 1, no. 1 (October 20, 2014): 8–12. http://dx.doi.org/10.30598/biopendixvol1issue1page8-12.
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Background: Seagrass grows and spreads in nearly all parts of the intertidal zone. Waai village has characteristic sloping coastal water and have different patterns of zonation of seagrass in the intertidal zone's third-impact on the presence of seagrass and the organisms in it.
Methods: The study was conducted in coastal waters Waai village, in the middle of the intertidal zone (middle intertidal zone) and the lower intertidal zone (lower zone intertidal). The samples in this study are all kinds of gastropods found in each plot observation station of 100 plots. Gastropod species diversity using diversity index formula Shannon - Wiener referred to under Ludwig and Reynolds.
Results: From the results of the study found 8 species of gastropods and has a diversity index that is currently in the middle intertidal zone, the average diversity index of 1.76, while in the lower intertidal zone, the average gastropod diversity index was 1.45.
Conclusion: diversity index indicates the middle intertidal zone, the average diversity index of 1.76, while in the lower intertidal zone, the average index of diversity of gastropods is 1.45, this is caused by the different seagrass zonation patterns and habits of the people who frequently uses seagrass area for commercial purposes.
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Long, Robert Hill. "Intertidal Zone." Hudson Review 50, no. 4 (1998): 613. http://dx.doi.org/10.2307/3853219.
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Titlyanov, Eduard A., Tamara V. Titlyanova, Xiubao Li, Gayle I. Hansen, and Hui Huang. "Seasonal changes in the intertidal algal communities of Sanya Bay (Hainan Island, China)." Journal of the Marine Biological Association of the United Kingdom 94, no. 5 (April 25, 2014): 879–93. http://dx.doi.org/10.1017/s0025315414000460.
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A floristic study of marine macrophytic algae and Cyanobacteria in the splash and intertidal zones at Luhuitou reef, Sanya Bay, Hainan Island, China, was conducted during the rainy and dry seasons of 2008−2012 utilizing 148 of the most common species. Macrophytic algal diversity increased from the splash zone to the low intertidal zone, while cyanobacterial diversity decreased. In the upper and middle intertidal zones, the dominant species (primarily highly productive ephemerals) changed frequently throughout each year. In the low intertidal zone, the dominant species (mainly annual fleshy, foliose and coriaceous forms) also changed. In the dry season, species numbers were 33% higher than in the rainy season. During the rainy season, Cyanobacteria dominated the splash zone, while green and red algae dominated in increasing numbers from the upper to the low intertidal zones. During the dry season the splash zone was devoid of all macrophytic algae, and only one species of Cyanobacteria survived. In the upper intertidal, Cyanobacteria and red algae prevailed, while in the mid and low zones, red and green algae were the most diverse. In spite of heavy pollution in Sanya Bay, there was no evidence of dramatic changes in species numbers or composition, and the marine flora was similar to that of unpolluted regions in the Indo-Pacific.
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Ebrahimnezhad, Saeed, and Reza Naderloo. "Quantitative analyses of decapod crustaceans at a rocky intertidal shore in the Gulf of Oman, Iran: diversity, zonation and monsoonal fluctuations." Journal of the Marine Biological Association of the United Kingdom 99, no. 2 (May 24, 2018): 445–59. http://dx.doi.org/10.1017/s0025315418000310.
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This paper provides data on diversity, zonation and seasonal fluctuations of decapod crustaceans at the northern Gulf of Oman coast, based on quantitative and qualitative samplings. A total of 75 species belonging to four infraorders, 27 families and 48 genera were identified. These species include 20 new records for the entire Gulf of Oman and 13 new records for its Iranian coast. The mid-intertidal zone showed a higher mean diversity and abundance than high- and low-intertidal zones. The mean diversity and abundance in the high-intertidal zone showed significant differences with the mid- and low-intertidal zones. The indices of species richness (Margalef), diversity (Shannon) and evenness (Pielou) showed significant differences among the intertidal zones. Most of the identified species (>60%) that had high values in their frequency of occurrence and relative abundance showed an overlapping vertical distribution, and were present in all three or just in two of the three defined zones. Other species were found only in one of the three zones (non-overlapping vertical distribution). The decapod community in the mid-intertidal zone showed a higher dissimilarity with the high-intertidal zone than with the low-intertidal. Both abundance and diversity were found to be lowest and highest during south-west and north-east monsoons, respectively. During south-west monsoon, the abundance of decapods declined dramatically, but species diversity and ecological indices did not show any statistically significant difference among the sampling periods.
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Lalu Japa, Ahmad Raksun, Karnan, Didik Santoso,. "Makroalga di Daerah Intertidal Pulau Lombok Bagian Selatan." Jurnal Biologi Tropis 18, no. 1 (June 30, 2018): 109. http://dx.doi.org/10.29303/jbt.v18i1.738.
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AbstrakMacroalga adalah sumber daya penting tidak hanya untuk komunitas intertidal, tetapi juga untuk manusia, seperti makanan, kosmetik, dan farmasi. Hal ini lebih mungkin bahwa sebagai bagian dari daerah tropis, zona intertidal Lombok memiliki keragaman makroalga yang tinggi. Sayangnya, keberadaan biota ini, terutama di daerah ini, sedikit diketahui. Makalah ini menggambarkan keanekaragaman hayati dan keadaan makroalga di Zona Intertidal Selatan Pulau Lombok. Informasi tentang keberadaan biota ini sangat membantu pemerintah dan masyarakat untuk mendapatkan sumber senyawa baru yang berharga yang diperlukan untuk kehidupan kita Kata kunci: zona intertidal, Lombok, makroalga. Abstract Macroalga is an important resources not only for intertidal communities, but also for human, such as food, cosmetic, and pharmacy. It is more likely that as a part of tropical area, intertidal zone of Lombok has a high diversity of macroalga. Unfortunately, the existency of this biota, mainly in this area, are litle known. This paper describe the biodiversity and state of macroalga in the Southern Intertidal Zone of Lombok Island. Information on the existency of this biota is very helpful for government and community to obtain new other valuable compound sources required for our life. Key words: intertidal zone, Lombok, macroalga.
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W¸esławski, J. M., M. Zajączkowski, J. Wiktor, and M. Szymelfenig. "Intertidal zone of Svalbard." Polar Biology 18, no. 1 (June 3, 1997): 45–52. http://dx.doi.org/10.1007/s003000050157.
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Szymelfenig, Maria, Sławomir Kwaśniewski, and J. Marcin Węsławski. "Intertidal zone of Svalbard." Polar Biology 15, no. 2 (January 1995): 137–41. http://dx.doi.org/10.1007/bf00241052.
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Macdonald, J. F., J. Bekkers, S. M. Macisaac, and D. M. Blouw. "Experiments On Embryo Survivorship, Habitat Selection, and Competitive Ability of a Stickleback Fish (Gasterosteus) Which Nests in the Rocky Intertidal Zone." Behaviour 132, no. 15-16 (1995): 1207–21. http://dx.doi.org/10.1163/156853995x00531.
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AbstractLike other 'white' sticklebacks, those ncsting intertidally at Spry Bay, Nova Scotia, Canada, remove fertilized eggs from the nest, disperse them over the surrounding area, and provide no subsequent parental care. However the breeding substrate at Spry Bay is devoid of the filamentous algae which are the normal breeding substrate of the white stickleback and which elsewhere facilitate survival of abandoned embryos. Experiments show that embryos dispersed in the intertidal zone at Spry Bay survive surprisingly well despite the complete absence of parental care and the periodic absence of water. Intertidal embryos generally develop faster than embryos in the adjacent subtidal zone, but there are exceptions to this pattern. Intertidal males show site fidelity to their nests despite interrupted access to territory, and they show consistent preference for nesting in the intertidal zone in the field. In the laboratory, and in the absence of tidal flux and competition, males taken from the rocky intertidal zone generally prefer to breed on bare rock substrate even when filamentous algae are freely available. When white stickleback males from an adjacent population which breeds subtidally in filamentous algae are introduced into the experimental aquaria as competitors, they exclude the males that breed on bare rock. The surprisingly high survivorship of embryos in the rocky intertidal zone, the habitat selection of males for bare substrate, and their exclusion by males that breed subtidally on algae, all suggest that the highly unusual breeding behaviours of intertidal white males form an effective alternative breeding repertoire. Because breeding habitat selection has implications for mate selection, the possibility exists that sticklebacks with different breeding repertoires at Spry Bay may mate assortatively.
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Fera Rahmawati, Yunita, Rizka Apriani Putri, Tatag Bagus Putra Prakarsa, Milade Annisa Muflihaini, and Yoga Putra Aliyani. "Diversity and Distribution of Molluscs in the Intertidal Zone of Nglambor Beach, Gunung Kidul, Yogyakarta." BIO Web of Conferences 33 (2021): 01002. http://dx.doi.org/10.1051/bioconf/20213301002.
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The intertidal zone is the area between the highest and lowest tides, which represents the transition from ocean conditions to land conditions. This study aimed to determine the diversity and distribution of mollusks that exist along the intertidal zone of Nglambor Beach, between August and November 2020. Observations of all molluscs were carried out at two random stations using 10 plots measuring 1 x 1 m 2 with 5 meters. A total of two classes of Mollusca (Gastropod and Bivalvia) belonging to twelve families and 19 species were found from upper to lower an intertidal zone. The upper intertidal zone was recorded to have the highest diversity and an evenness index (Shannon-Wiener diversity index: H ’= 2.524 and Pielou evenness index: J’ = 0.932) compared to the middle and lower zones. It can be concluding that the diversity index in the study location is categorized as medium and its evenness is high. Thais hippocastanum is the most dominant species found in the upper and middle zones, while Thais tissoti dominates in the lower zone. This research contributed to a preliminary checklist on molluscs, which will support a baseline study on the intertidal in future.
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Rangeley, R. W., and M. L. H. Thomas. "Littoral Stratification in Growth form and Fecundity of the Rock Barnacle, Semibalanus Balanoides." Journal of the Marine Biological Association of the United Kingdom 68, no. 4 (November 1988): 591–99. http://dx.doi.org/10.1017/s0025315400028733.
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The population dynamics of rock barnacles, Semibalanus balanoides (L.), residing in low and high intertidal zones are affected by conspicuously different factors. The barnacle population in the high intertidal zone tends to show longterm stability due to a low incidence of both predation and interspecific competition. Wave exposure, desiccation and intraspecific competition are more important factors affecting abundance and size distribution in this zone (Menge, 1976). In the low intertidal zone, barnacle predation by the dogwhelk, Nucella lapillus (L.) is intense (Menge, 1976) and both the adults and larvae are smaller than in the high intertidal zone (Barnes, 1953). The growth form of S. balanoides is density dependent with taller, more columnar individuals predominating at high densities and short conical barnacles at low densities. Lower fecundity of conical individuals may be due to lower internal shell volume compared with columnar forms (Wethey, 1984). Fecundity increases both with increasing age and base length (Arnold, 1977) and is positively density dependent (Wethey, 1984).
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Nurhaliza, Siti, Muhlis Muhlis, Imam Bachtiar, and Didik Santoso. "STRUKTUR KOMUNITAS KARANG KERAS (SCLERACTINIA) DI ZONA INTERTIDAL PANTAI MANDALIKA LOMBOK TENGAH." Jurnal Biologi Tropis 19, no. 2 (December 30, 2019): 302. http://dx.doi.org/10.29303/jbt.v19i2.1390.
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Abstrak: Zona intertidal merupakan daerah pantai yang terletak antara pasang tertinggi dan surut terendah. Salah satu ekosistem yang terdapat di kawasan intertidal adalah ekosistem terumbu karang. Terumbu karang merupakan salah satu ekosistem laut yang menjadi sumber kehidupan bagi berbagai biota laut sehingga keberadaannya sangat penting, baik dari segi ekologis maupun ekonomis. Pantai Mandalika memiliki ekosistem terumbu karang dengan zona intertidal yang cukup luas. Pesatnya perkembangan wisata di Pantai Mandalika secara tidak langsung akan mempengaruhi kehidupan terumbu karang. Penelitian ini dilakukan untuk menyediakan data dan informasi terkini mengenai kondisi keanekaragaman karang keras di zona intertidal Pantai Mandalika yang mencakup komposisi spesies, famili dan bentuk pertumbuhan, serta indeks ekologi (indeks keanekaragaman, keseragaman dan dominansi spesies). Pengambilan data dilakukan pada bulan Juni 2019 selama periode surut terendah di kawasan intertidal. Metode yang digunakan yaitu metode Underwater Photo Transect (UPT). Hasil penelitian ini menemukan 30 spesies karang keras yang termasuk dalam 8 famili di zona intertidal Pantai Mandalika. Favites paraflexuosa adalah spesies yang paling banyak ditemukan di daerah tersebut dengan persentase 22%. Famili Faviidae (79%) memiliki persentase terbesar di semua transek. Ada 5 jenis bentuk pertumbuhan karang keras di daerah yang 87% di antaranya adalah bentuk karang masif. Nilai indeks keanekaragaman Shannon-Wiener adalah 2,5 dengan indeks keseragaman 0,8, dan indeks dominansi 0,1.Kata kunci: komunitas, terumbu karang, zona intertidal, keanekaragaman, Pantai Mandalika.Abstract: The intertidal zone is a coastal area located between the highest and lowest tides. One of the ecosystems in the intertidal area is the coral reef ecosystem. The coral reef is one of the marine ecosystems which is a source of life for various marine biota so that its existence is very important, both in ecological and economic terms. Mandalika Beach has a coral reef ecosystem with a fairly extensive intertidal zone. The rapid development of tourism in Mandalika Beach will indirectly affect the life of coral reefs. This research to provide data for the existing condition of hard corals diversity in the area for better understanding of future research. This research covers the species, family and life form composition, and ecologycal indices (diversity, species equitability, and dominance indices). The research was conducted on June 2019 during the lowest tide period and carried out with a Underwater Photo Transect (UPT) method. The results revealed that Mandalika’s Intertidal Zone had 30 species of hard corals that belongs to 8 families. Favites paraflexuosa was the most abundant coral in the area with 22% of community composition. The Faviidae family (79%) had the largest percentage in all transects. There were 5 type life forms of hard corals in the area which 92% of them were coral massive type. The Shannon-Wiener diversity index score was 2.5 with equitability index 0.8, and dominance index is 0.1. Keywords: community coral reef, intertidal zone, diversity, Mandalika Beach.
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Garbary, David J., Megan P. Fass, and Herb Vandermeulen. "Invasive Fucus serratus (Fucaceae, Phaeophyceae) responds to climate change along the Atlantic Coast of Nova Scotia, Canada." Botanica Marina 64, no. 5 (September 29, 2021): 407–17. http://dx.doi.org/10.1515/bot-2021-0056.
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Abstract The distribution and ecology of the invasive brown alga Fucus serratus along the 500 km Atlantic coast of Nova Scotia, Canada, has been poorly explored. We observed significant intertidal penetration at four sites in the southwestern part of the province, and then examined numerous sites along the Atlantic coast of Nova Scotia. Surveys of attached algae in intertidal and shallow subtidal zones and wrack show that F. serratus has become a dominant plant in the low to mid-intertidal zone and can be expected on headlands along the South Shore of Nova Scotia where it can occupy up to 40% of the intertidal zone with cover >75% and mean densities of up to 10 kg m−1. In this zone, F. serratus has replaced Chondrus crispus as the major canopy species, although C. crispus and Corallina officinalis remain primary understory species. At slightly higher elevations, F. serratus was common as an understory beneath Ascophyllum nodosum and Fucus vesiculosus. While geographic spread along the Atlantic coast might reflect the natural dispersal capacity of F. serratus, we hypothesize that the ecological extension into the intertidal zone may be facilitated by harvesting of A. nodosum and by climate change in an ocean-warming hotspot.
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Tokranov, A. M. "ICHTHYOFAUNA OF INTERTIDAL ZONE FROM KAMCHATKA’S NEIGHBOURING WATERS AND ADJACENT NORTH-WESTERN PART OF THE BERING SEA." Bulletin оf Kamchatka State Technical University, no. 53 (2020): 66–80. http://dx.doi.org/10.17217/2079-0333-2020-53-66-80.
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The composition of intertidal ichthyofauna from Kamchatka’s neighboring areas is characterized. Since 1930-es, 61 fish species from 17 families have been recorded in the intertidal zone, and most (82%) are rep-resentatives of Scorpaeniformes and Perciformes. Fishes recorded in the intertidal zone are components of six ichthyocenes, but its nucleus (86.9%) is formed by representatives of only 3 of them: littoral, sublittoral, and elittoral ichthyocenes. Most species are rare (56.3−81.8%). Juveniles constitute a prevailing proportion of fish species recorded in the intertidal zone near Kamchatka waters.
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Voulgaris, George, K. S. Black, D. M. Paterson, and A. Cramp. "Sedimentary Processes in the Intertidal Zone." Estuaries 22, no. 3 (September 1999): 728. http://dx.doi.org/10.2307/1353060.
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Mehta, Ashish J. "Sedimentary processes in the intertidal zone." Limnology and Oceanography 44, no. 4 (June 1999): 1184–85. http://dx.doi.org/10.4319/lo.1999.44.4.1184.
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Torroglosa, María Eugenia, and Juliana Giménez. "Responses of the mussel Brachidontes rodriguezii to aerial exposure: implications on growth and physiological condition." Canadian Journal of Zoology 97, no. 7 (July 2019): 612–18. http://dx.doi.org/10.1139/cjz-2018-0173.
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The length of aerial exposure (i.e., environmental conditions) of an organism, due to daily tides, induces physiological responses. A mark–recapture field experiment was conducted in two intertidal zones (low tide and high tide) using the stain calcein AM to determine growth, as measured by shell length, of the mussel Brachidontes rodriguezii (d’Orbigny, 1842) along its vertical distribution off the north Argentinean coast. In the high intertidal zone, B. rodriguezii exhibited slower growth in shell length because of the physiological stress resulting from aerial exposure during low tides. In the low intertidal zone and during spring, B. rodriguezii exhibited faster growth in shell length. It is suggested that growth of B. rodriguezii relies on several environmental factors (temperature, photoperiod, and aerial exposure) that fluctuate according to tidal height.
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Literathy, P., L. Nasser Ali, M. A. Zarba, and K. Puskas. "Effects of Sewage Outfalls on Intertidal Ecosystems in Kuwait." Water Science and Technology 18, no. 11 (November 1, 1986): 35–45. http://dx.doi.org/10.2166/wst.1986.0140.
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Kuwait City has an impact on the nearshore marine environment by discharging sewage randomly through short emergency outfalls into the intertidal zone. The effect of the discharged sewage on the biological activity and the chemical characteristics of the relevant intertidal areas, which are controlled by a dry, tropical climate, was studied. Pore water, tidal water characteristics and nutrient release and transport from the intertidal zone during tidal flushing were investigated in polluted and unpolluted areas. The accumulation of particulate organic matter in the upper, middle and lower intertidal zones was characterized. It was concluded that in addition to settling, a great deal of particulate organic matter entered into the upper tidal sediment by infiltration during high tide and was filtered out by the sediment and migrated toward the low tide zone during the falling tide. The rate of the release of the substances associated with inorganic particulates was controlled by the overall organic load and the microbial activity. Sediment core samples were taken for multistage carbon dioxide treatment, and the results showed a decrease in carbonate-bound phosphates with depth. Photosynthetic productivity observed during the spring showed a close relationship with the sewage discharges and were also controlled by the tidal current. Based on the determination of dissolved nutrients, it was concluded that the limiting nutrient for photosynthesis was nitrogen rather than phosphorous. The release of some heavy metals from the sewage-polluted intertidal sediment was significant, and beachrock development also related to the discharges. The intertidal fauna was impoverished because of the organic sludge.
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Adame, Maria Fernanda, Ruth Reef, Alistair Grinham, Glen Holmes, and Catherine E. Lovelock. "Nutrient exchange of extensive cyanobacterial mats in an arid subtropical wetland." Marine and Freshwater Research 63, no. 5 (2012): 457. http://dx.doi.org/10.1071/mf11133.
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Cyanobacterial mats cover extensive areas of subtropical arid coastal wetlands and are sites of active nutrient exchange. To assess spatial (low v. high in the intertidal zone) and temporal (day v. night) variability in nitrogen (N) exchange in arid Exmouth Gulf, Western Australia, we measured nutrient exchange (NOx–-N, NH4+ and soluble reactive phosphorus) during tidal inundation and N fixation of cyanobacterial mats before and during an unusual period of heavy rainfall. Additionally, we investigated the species composition within the cyanobacterial mat. We hypothesised that nutrients are released to the floodwater during tidal inundation, that N fixation is a significant path of N incorporation, that highest N fixation rates occur in the low intertidal zone at night, and that the cyanobacterial mat community composition varies across the intertidal zone. Our results showed that nutrients were removed from the floodwater during tidal inundation. N fixation accounted for 34% of N incorporation, with highest rates in the lower intertidal zone during the day. The cyanobacterial mat was dominated by Microcoleus chthonoplastes, but composition varied across the intertidal zone. The present study provided evidence of temporal and spatial variability in nutrient exchange and implied an important role of cyanobacterial mats in coastal production.
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Rohmayani, V., E. Tunjung Sari M., Nurhidayatullah Romadhon, and H. Ichda Wahyuni. "Diversity of Bivalvia, Gastropoda and Holothuroidea in Intertidal Zone of North Javan Sea Coastal, Indonesia." Jurnal Biologi UNAND 9, no. 1 (June 23, 2021): 1. http://dx.doi.org/10.25077/jbioua.9.1.1-7.2021.
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This study aims to know diversity of Bivalvia, Gastropoda and Holothuroidea. Measures used in this study were Density Index (D), Diversity Index (H’), Evennes Index (E’) dan Important Value Index (INP). This study used transect sampling method by 1 × 1 meter quadrant. Target species of this study were member of Bivalvia, Gastropoda and Holothuroidea that inhabit in intertidal zone of north Javan Sea coastal. This intertidal zone was divided into 3 zone; zone I is 50 meter, zone II is 75 meter and zone III is 100 meter from coastal line to sea. Total sample of this species were 1064 individual, that divided into 7 species of Bivalvia, 10 species of Gastropoda and 2 spesies of Holothuridea. The highest Diversity Index was for Gastropoda in zone I (253 individual/m2). Diversity Index was in moderate category (1< H’ < 2) while the zone III was the highest. Evennes Index of all zones were relatively similar. The highest Important Value Index was species of Clypeomorus clypeomorus, that has value 53,06%.
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Xia, Y. Q., and H. L. Li. "A combined field and modeling study of groundwater flow in a tidal marsh." Hydrology and Earth System Sciences 16, no. 3 (March 7, 2012): 741–59. http://dx.doi.org/10.5194/hess-16-741-2012.
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Abstract. Bald mud beaches were found among the mangrove marshes in Dongzhaigang National Nature Reserve, Hainan, China. To investigate the possible reasons for this phenomenon, the intertidal zones of a mangrove transect and a bald beach transect with similar topography and tidal actions were selected for comparison study. Along both transects, observed water table variations were significant in the high and low intertidal zones and negligible in the middle intertidal zones. Despite the same tidal actions and above-mentioned similarities, observed groundwater salinity was significantly smaller along the mangrove transect (average 23.0 ppt) than along the bald beach transect (average 28.5 ppt). These observations invite one hypothesis: the hydraulic structure of tidal marsh and freshwater availability may be the main hydrogeological factors critical to mangrove development. Two-dimensional numerical simulations corroborated the speculation and gave results in line with the observed water table. The two transects investigated were found to have a mud-sand two-layered structure: a surface zone of low-permeability mud and an underlying high-permeability zone that outcrops at the high and low tide lines. The freshwater recharge from inland is considerable along the mangrove transect but negligible along the bald beach transect. The high-permeability zone may provide opportunity for the plants in the mangrove marsh to uptake freshwater and oxygen through their roots extending downward into the high-permeability zone, which may help limit the buildup of salt in the root zone caused by evapotranspiration and enhance salt removal, which may further increase the production of marsh grasses and influence their spatial distribution. The bald beach is most probably due to the lack of enough freshwater for generating a brackish beach soil condition essential to mangrove growth. It is also indicated that seawater infiltrated the high-permeability zone through its outcrop near the high intertidal zone, and discharged from the tidal river bank in the vicinity of the low tide line. These processes thereby formed a tide-induced seawater-groundwater circulation, which likely provided considerable contribution to the total submarine groundwater discharge (SGD). Finally, implications and uncertainties behind this study were summarized for future examinations.
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Salmanu, Sriyanti I. A. "FAKTOR FISIK KIMIA LINGKUNGAN PENDUKUNG KEANEKARAGAMAN DAN KEMERATAAN HOLOTHUROIDEA PADA ZONA INTERTIDAL DESA HILA KECAMATAN KEPULAUAN ROMANG KABUPATEN MALUKU BARAT DAYA." BIOPENDIX: Jurnal Biologi, Pendidikan dan Terapan 3, no. 1 (October 16, 2016): 28–32. http://dx.doi.org/10.30598/biopendixvol3issue1page28-32.
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Background: The sea is an ecosystem that has high biodiversity. Hila Village is one area that has a large enough waters located in the western part of Romang island, District of Romang Islands, Southwest Maluku District. Intertidal Zone Hila Village has different types of substrate, both muddy, sandy, sandy, dreamy, rocky, rocky, sandy, rocky, and rocky rocked. The existence of the types of sea cucumbers (Holothuroidea) in the coastal waters of Hila village quite a lot, physical chemical environmental factors in the coastal waters of Hila Village support the life of the sea cucumber.
Method: This research is descriptive research that reveal information about environmental characteristic (temperature, pH, salinity, and dissolved oxygen), diversity and evenness of sea cucumber in intertidal zone of Hila Village.
Results: The results of the research on the intertidal zone of Hila Village, Pulau Romang Subdistrict, Southwest Maluku District, were found 7 genus and 8 spesies. The types of Holothuroidea found in the study sites are Bohadschia argus, Holothuria atra, Holothuria edulis, Bohadschia marmorata, Holothuria scraba, Chiridota violaceae, Holothuria fuscopunctata, and Opheodesoma spectabili. The Holothuroidea diversity index in the Intertidal Zone of Hila Village is 1.56, categorized by medium diversity, for evenly distributed evenness because the fairness index is 1.05.
Conclusion: The index of the Holothuroidea diversity in the Intertidal Zone of Hila Village is 1.56, categorized by medium diversity, for evenly distributed evenness because the fairness index is 1.05. Chemical Physical Factors The envelope found was the average temperature of 28.270C, the average pH 6.373, and the average salinity of 4.94%, indicating that the Holothuroidea was able to adapt and live in the intertidal zone of Hila Village.
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Checon, Helio H., Mariana O. Silva, Guilherme N. Corte, Leonardo Q. Yokoyama, M. Alexandra Teodósio, and Alexander Turra. "Full stomachs at empty tides: tidal cycle affects feeding activity and diet of the sandy beach gastropod Olivella minuta." Journal of Molluscan Studies 86, no. 3 (June 12, 2020): 219–27. http://dx.doi.org/10.1093/mollus/eyaa007.
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ABSTRACT Olivella minuta is an abundant neogastropod on sandy beaches from Texas (USA) to southern Brazil. This study aimed to characterize and compare the feeding activity and diet of a Brazilian population of O. minuta in different tidal zones (intertidal and subtidal), and different tidal levels (high and low tides), with three combinations of tidal zone and level being studied (intertidal during low tide, intertidal during high tide and subtidal). The results showed that diet composition was generally similar among tidal conditions, with O. minuta being a generalist, feeding on 45 different food items. Feeding activity, however, was higher in the intertidal during low tide, whereas the richness and diversity of food items were higher in the intertidal during high tide. The higher feeding activity of O. minuta during low tide may be linked to a lower risk of predation; at low tide organisms may be able to feed for a longer time, and this may be particularly true on beaches with fine sand, where water retention is higher than that on beaches with coarse sand. The higher diversity of food items consumed in the intertidal during high tide is likely related to the increased prevalence of planktonic food during high tide. Our results indicate that tidal zone and level may strongly influence the feeding activity of coastal soft-bottom species and that species may show higher feeding activity during low tide. Given the current loss of intertidal habitats due to anthropogenic activity and climate-change associated factors, our study has important implications, highlighting the importance of intertidal areas for the ecology and conservation of sandy beach species.
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Bass, Andrew H. "Sounds from the Intertidal Zone: Vocalizing Fish." BioScience 40, no. 4 (April 1990): 249–58. http://dx.doi.org/10.2307/1311261.
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Vermeulen, Els. "Intertidal habitat use of bottlenose dolphins (Tursiops truncatus) in Bahía San Antonio, Argentina." Journal of the Marine Biological Association of the United Kingdom 98, no. 5 (May 30, 2017): 1109–18. http://dx.doi.org/10.1017/s0025315417000856.
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Very little information is available on bottlenose dolphin (Tursiops truncatus) habitat use in the South-western Atlantic. It is, however, essential in understanding their ecology and to improve conservation management. In this study, habitat use of bottlenose dolphins was examined in Bahía San Antonio, an area frequented by the species. Given the large tidal amplitude and extended intertidal zone in this bay, special focus was given to the intertidal vs subtidal habitat use patterns. Bottlenose dolphins were observed in only half of the surveyed area, with on average 1 dolphin group encountered per 100 km surveyed. All dolphin groups were seen in shallow waters <10 m deep. GLM analyses showed that especially during high tide, depth had an important effect on the dolphin encounter rate, with most dolphin groups encountered in the intertidal zone. While in the intertidal zone, most dolphin groups were observed to be engaged in surface feeding activities. The presented data indicate dolphins remained in shallow waters, and moved to the intertidal zone during high tide where they appear to find feeding opportunities. This information is believed to be of high value in understanding this population's ecological needs, and essential when aiming to improve marine conservation efforts at times of increased anthropogenic pressures in the area.
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Sui, Na, Yu Liu, and Bao Shan Wang. "Comparative Study on Photosynthetic Characteristics of Two Ecotypes of Euhalophyte Suaeda salsa L. Grown Under Natural Saline Conditions." Advanced Materials Research 726-731 (August 2013): 4488–93. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.4488.
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Suaeda salsa L. grown in the intertidal zone and those in high salinity soils of the Yellow River Delta were used to investigate the category and characteristic of photosynthesis and fluorescence. Results showed that the water content, Na+ and Cl- contents of the high salinity soils were lower. The temperature on the surface of soil and in the depth of 10 cm from the surface, the content of K+ and Ca2+ of the high salinity soils were significantly higher than those in the intertidal zone soils. Pn, Gs, Fv/Fm, ФPSII, the fresh weight and dry weight per plant of S. salsa grown in the high salinity soils were higher. However, Ci of S. salsa grown in the high salinity soils were lower. These suggested that S. salsa grown in the high salinity soils was mainly suffering from salt stress, while S. salsa in the intertidal zone soils was suffering from waterlogging, low temperature and salt stress together. S. salsa in the intertidal zone soils decreased light absorption and alleviated photoinhibition, but as a result the biomass was reduced.
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Gosztonyi, A. E., and A. Lopez-Arbarello. "Sexual dimorphism in Patagonotothen sima (Richardson, 1844)." Antarctic Science 12, no. 4 (December 2000): 427–28. http://dx.doi.org/10.1017/s0954102000000511.
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In Argentina, the Nototheniidae is represented by about 20 species, which mostly live in coastal waters of the continental shelf and slope. A few species inhabit inshore waters along the coasts of Patagonia and the Fueguian and Falkland (Malvinas) archipelagos and even reach rocky intertidal zones (Norman 1937, Hart 1946). Patagonotothen sima (Richardson 1844) is distributed in the Atlantic from the San Matías Gulf (around 42°S) to the Beagle Channel (54°50'S), inhabiting shallow waters including the intertidal zones. During faunal surveys in the rocky intertidal zone in Puerto Deseado, Santa Cruz (by A. Gosztonyi), it was noted that males of P. sima, one of the most common fish species in that habitat, appeared to have a higher second dorsal fin than the females.
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Cao, Jia Mu, Yi Jiang Cao, and Ju Meng Feng. "Intelligent Control System for Intertidal Benthos Research Based on Internet of Things." Applied Mechanics and Materials 389 (August 2013): 632–37. http://dx.doi.org/10.4028/www.scientific.net/amm.389.632.
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A simulation system for intertidal zone environment that can be remotely monitored is proposed. The system is divided into the two parts of remote control center and environment simulator, which are interconnected through wireless network technology. The remote control center performs remote monitoring through upper machine software, while the environment simulator can simulate natural environments such as ocean tides, water temperature and light illumination in different types of intertidal zones. Users can change and access the environmental parameters and data of the environment simulator by making instructions at the remote control center. A stable system is realized in accordance with the design requirements, and actual tests show that main features of the simulated natural environment in intertidal zones are very close to actual environment.
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de Santana, Carolina Oliveira, Pieter Spealman, Vânia Maria Maciel Melo, David Gresham, Taíse Bomfim de Jesus, and Fabio Alexandre Chinalia. "Effects of tidal influence on the structure and function of prokaryotic communities in the sediments of a pristine Brazilian mangrove." Biogeosciences 18, no. 7 (April 6, 2021): 2259–73. http://dx.doi.org/10.5194/bg-18-2259-2021.
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Abstract. Mangrove forests are ecosystems that constitute a large portion of the world's coastline and span tidal zones below, between, and above the waterline, and the ecosystem as a whole is defined by the health of these tidal microhabitats. However, we are only beginning to understand tidal-zone microbial biodiversity and the role of these microbiomes in nutrient cycling. While extensive research has characterized microbiomes in pristine vs. anthropogenically impacted mangroves, these have, largely, overlooked differences in tidal microhabitats (sublittoral, intertidal, and supralittoral). Unfortunately, the small number of studies that have sought to characterize mangrove tidal zones have occurred in impacted biomes, making interpretation of the results difficult. Here, we characterized prokaryotic populations and their involvement in nutrient cycling across the tidal zones of a pristine mangrove within a Brazilian Environmental Protection Area of the Atlantic Forest. We hypothesized that the tidal zones in pristine mangroves are distinct microhabitats, which we defined as distinct regions that present spatial variations in the water regime and other environmental factors, and as such, these are composed of different prokaryotic communities with distinct functional profiles. Samples were collected in triplicate from zones below, between, and above the tidal waterline. Using 16S ribosomal RNA (rRNA) gene amplicon sequencing, we found distinct prokaryotic communities with significantly diverse nutrient-cycling functions, as well as specific taxa with varying contributions to functional abundances between zones. Where previous research from anthropogenically impacted mangroves found the intertidal zone to have high prokaryotic diversity and be functionally enriched in nitrogen cycling, we find that the intertidal zone from pristine mangroves has the lowest diversity and no functional enrichment, relative to the other tidal zones. The main bacterial phyla in all samples were Firmicutes, Proteobacteria, and Chloroflexi while the main archaeal phyla were Crenarchaeota and Thaumarchaeota. Our results differ slightly from other studies where Proteobacteria is the main phyla in mangrove sediments and Firmicutes makes up only a small percentage of the communities. Salinity and organic matter were the most relevant environmental factors influencing these communities. Bacillaceae was the most abundant family at each tidal zone and showed potential to drive a large proportion of the cycling of carbon, nitrogen, phosphorus, and sulfur. Our findings suggest that some aspects of mangrove tidal zonation may be compromised by human activity, especially in the intertidal zone.
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Nasution, Syafruddin. "Biomassa Kerang Anadara granosa pada Perairan Pantai Kabupaten Indragiri Hilir." Jurnal Natur Indonesia 12, no. 1 (November 20, 2012): 61. http://dx.doi.org/10.31258/jnat.12.1.61-66.
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The present study was carried out to investigate the biomass of cockle (Anadara granosa) from coastal waters ofSouth Indragiri District, Riau Province. The biomass was investigated by quadrad sampling method in the intertidalarea along the Concong beach, where fishing of cockles mainly occured. The first station was near by the Concongestuary, while the second station was about 3 miles away from the fisrt one. Samples were collected from threedifferent portions of the intertidal zone that of High Intertidal Mid-Intertidal, and Low Intertidal. The result showedthat the highest biomass was found at the lower partion of the intertidal zone. Soft tissue of A. granosa was about24.8% of total wet-weight and 7.2 % of dry-weight. While material organic was about 85 % of soft tissue dry-weight.Water qualities of the sampling station showed that the overall water qualities were still in normal condition.
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Zoumpouli, E., F. Pomoni-Papaioannou, A. Zelilidis, and G. Iliopoulos. "Biostratigraphical and sedimentological study of an Upper Cretaceous succession in the Sami area (central area of Kefallinia, W. Greece)." Bulletin of the Geological Society of Greece 47, no. 1 (December 21, 2016): 226. http://dx.doi.org/10.12681/bgsg.10931.
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On the island of Kefallinia, which lies at the external edge of the Hellenides fold and thrust system, appear the Paxi and the Ionian Zones. In this study, an Upper Cretaceous carbonate succession, which is a part of the Paxi Zone, cropping out near the area of Sami (central area of Kefallinia), is discussed in detail with regard to its depositional facies, microfacies, biostratigraphy and palaeoenviroments. Detailed sedimentological and palaeontological investigations have been carried out on seven sections and petrographic analysis of thin-sections that led to the recognition of a number of microfacies types grouped into four facies zones. There was recorded a supratidal- intertidal (restricted)-intertidal (open lagoon)- subtidal (or shallow subtidal) vertical transition. Supratidal facies are characterized by fenestral and peloidal wackestone / packstone, intertidal (restricted) facies are represented by bioclastic wackestone and bindstone, whereas intertidal (open lagoon) facies are indicated by bioclastic packstone. Finally subtidal facies are dominated by bioclastic floatstone and grainstone. Benthic foraminifera are especially abundant and along with calcareous algae are the most important fossils used for age determination. The benthic foraminiferal genera that were identified (Cuneolina sp., Quinqueloculina sp., Nezzazata sp., Pseudonummoloculina sp., Dicyclina sp.), in addition with the observed calcareous algae, rudist and gastropods provide significant data for the depositional environments and the paleoecology of the Paxi Zone during the Upper Cretaceous.
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Stekoll, Michael S., Lawrence Deysher, and Thomas A. Dean. "Seaweeds and the Exxon Valdez Oil Spill." International Oil Spill Conference Proceedings 1993, no. 1 (March 1, 1993): 135–40. http://dx.doi.org/10.7901/2169-3358-1993-1-135.
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ABSTRACT A three-year study, initiated in 1989, has evaluated the response of subtidal and intertidal seaweed communities to the Exxon Valdez oil spill and subsequent cleanup activities. The project was part of the coastal habitat injury assessment research sanctioned under the natural resource damage assessment program. A stratified random design was used to select oiled sites for the study. Paired control (unoiled) sites were then matched to the oiled sites. The most consistent effect found in subtidal populations in Prince William Sound was the higher relative abundance of small-size classes of kelps at the oiled sites, indicating the prior disappearance of larger plants. This disappearance was possibly caused by activities associated with the cleanup operations. Intertidal populations of algae were affected by the spill and cleanup in all three major areas studied: Prince William Sound, Cook Inlet-Kenai, and Kodiak-Alaskan Peninsula. The most obvious effect was a significant removal of the dominant intertidal plant Fucus gardneri from the mid and upper intertidal zones. The limited dispersal of this plant combined with the relatively harsh conditions of the upper intertidal will cause a slow recovery of the upper intertidal zone in the affected areas. Effects of the spill extended to other algal species. Species such as Cladophora, Myelophycus, Odonthalia, Palmaria, and Polysiphonia showed decreases in their percent cover at oiled sites. Only Gloiopeltis populations appeared to increase in percent cover in oiled areas. In both the Cook Inlet-Kenai and the Kodiak-Alaskan Peninsula areas Fucus populations appeared to be enhanced in the lower intertidal zone—between 2 and 3 meters below the high-tide mark—in 1991.
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Bué, Isabel, João Catalão, and Álvaro Semedo. "Intertidal Bathymetry Extraction with Multispectral Images: A Logistic Regression Approach." Remote Sensing 12, no. 8 (April 21, 2020): 1311. http://dx.doi.org/10.3390/rs12081311.
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In this study, a methodology to estimate the intertidal bathymetry from multispectral remote sensing images is presented. The technique is based on the temporal variability of the water and the intertidal zone reflectance and their correlation with the tidal height. The water spectral behavior is characterized by high absorption at the infrared (IR) band or radiation with higher wavelengths. Due to tidal cycles, pixels on the intertidal zone have higher temporal variability on the near IR spectral reflectance. The variability of IR reflectivity in time is modeled through a sigmoid function of three parameters, where the inflection parameter corresponds to the pixel elevation. The methodology was tested at the Tagus river estuary in Lisbon, Portugal, and at the Bijagós archipelago, in the West African nation of Guinea-Bissau. Multispectral images from Sentinel-2 satellites were used, after atmospheric corrections from ACOLITE processor and the derived bathymetric model validated with in situ data. The presented method does not require additional depth data for calibration, and the output can generate intertidal digital elevation models at 10 m spatial resolution, without any manual editing by the operator. The results show a standard deviation of 0.34 m at the Tagus tidal zone, with −0.50 m bias, performing better than the Stumpf ratio transform algorithm, also applied to the test areas to derive intertidal bathymetry. This methodology can be used to update intertidal elevation models with clear benefits to monitoring of intertidal dynamics, morphodynamic modeling, and cartographic update.
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Dethier, Megan N. "The distribution and reproductive phenology of intertidal fleshy crustose algae in Washington." Canadian Journal of Botany 65, no. 9 (September 1, 1987): 1838–50. http://dx.doi.org/10.1139/b87-253.
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Fleshy (noncalcified) crustose algae are abundant throughout the intertidal zone in Washington State. Crusts include members of the Chlorophyta, Phaeophyta, Rhodophyta, Cyanobacteria, and marine lichens and represent a variety of life-history patterns. Some of the 14 taxa studied are observed only in specific habitats (e.g., only in the low or high intertidal zone or in pools), whereas others are broadly distributed throughout the intertidal zone. All crusts are patchy in their distribution, and their thicknesses show no trends with tidal height. The reproductive periodicity of 10 common fleshy species was studied over 2 years. Most crusts reproduce in the fall and winter, but none is rigidly tied to a seasonal pattern. A key to the fleshy crusts is provided.
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SAKHALKAR S.S, SAKHALKAR S. S., and MISHRA R. L. MISHRA R.L. "Biodiversity of Marine Benthic Algae from Intertidal Zone of Konkan Coast. (Maharashtra)." Indian Journal of Applied Research 4, no. 2 (October 1, 2011): 12–3. http://dx.doi.org/10.15373/2249555x/feb2014/12.
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Demello, Rahul, and Nicole E. Phillips. "Variation in mussel and barnacle recruitment parallels a shift in intertidal community structure in the Cook Strait region of New Zealand." Marine and Freshwater Research 62, no. 10 (2011): 1221. http://dx.doi.org/10.1071/mf11053.
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Recruitment influences populations and communities of marine organisms to varying degrees and across a range of spatial scales. We hypothesised that recruitment plays a role in maintaining different intertidal invertebrate assemblages between two nearby locations in New Zealand (Wellington Harbour and the south coast), long reported to have dramatically different communities (with greater cover of sessile invertebrates in the Harbour). Sites in Wellington Harbour were hypothesised to have higher monthly recruitment rates of mussels and barnacles and greater barnacle colonisation after 1 year. Surveys were conducted to quantify community differences. In Wellington Harbour, the mid-intertidal zone was dominated by the mussel Mytilus galloprovincialis and the barnacle Chamaesipho columna and the high intertidal zone by C. columna. In contrast, on the south coast mussels were almost completely absent from both tidal heights and barnacles (predominantly Chamaesipho brunnea) were sparse. In the high zone, monthly recruitment and long term colonisation (over 1 year) of barnacles was much greater in the Harbour; in the mid-intertidal zone, mussel recruitment was up to two orders of magnitude greater in the Harbour than the south coast. Species-specific recruitment patterns differed between the locations, however and were consistent with those of adult abundance.
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Adharini, Ratih Ida, Namastra Probosunu, Atika Arifati, Tika Drastiana, and Fitriana C. Rusnasari. "The diversity of intertidal fish in Sundak Beach, Yogyakarta, Indonesia, during dry and rainy seasons." E3S Web of Conferences 147 (2020): 02020. http://dx.doi.org/10.1051/e3sconf/202014702020.
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The intertidal zone is a transition area between sea and land with unique characteristics. This research aimed to determine the diversity and types of fish in the intertidal zone of Sundak Beach, Yogyakarta, Indonesia. This research was conducted in December 2016–September 2017 along the intertidal zone of Sundak Beach. Fish samples were collected by fishermen twice a month using a hand net and hand line in an area of 22,000 m2 by random sampling. Water quality data included air and water temperatures, pH, salinity, tides, rainfall intensity, and substratum. Fish samples were identified, and the total length and weight were measured. Results showed that carnivores and herbivores were dominant during the rainy season, whereas carnivores and omnivores were dominant during the dry season. Total of 179 fish, which were grouped into 18 families and 31 species. The diversity species index was 1.067 (intermediate diversity) during the rainy season but 0.19 (low diversity) during the dry season. The dominancy index was low (0.11–0.34) during the dry season, whereas during the rainy season was higher (0.18–0.72). The study concluded that the intertidal zone of Sundak Beach has a good condition as nursery, feeding, and spawning grounds for fishes.
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Marshall, David J., Hussein Taha, Amalina Brahim, and Ahmed Awad Abdelhady. "Supratidal existence drives phenotypic divergence, but not speciation, in tropical rocky-shore snails." Biological Journal of the Linnean Society 132, no. 1 (November 20, 2020): 1–16. http://dx.doi.org/10.1093/biolinnean/blaa164.
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Abstract The mechanisms underlying the evolutionary adaptation of animals that transcend the ecological barrier separating the intertidal and supratidal zones of rocky shores are poorly understood. Different wetting frequencies in these zones in tropical regions (daily vs. seasonally, respectively) impose different physical stressors, which should drive phenotypic variation and ultimately speciation in the animals that inhabit them. We studied morphological, physiological and genetic variation in a tropical high-shore gastropod that transcends these zones [Echinolittorina malaccana (Philippi, 1847)]. Variation in melanization, shell features and evaporative water loss was linked to regular seawater wetting, frequent activity and feeding, and solar exposure in intertidal snails, and to inactivity and prolonged aestivation in the shade during continuous air exposure in supratidal snails. Despite selective pressure for phenotypic divergence, and reproductive isolation of the populations in either zone, their mitochondrial COI gene sequences confirmed that they represent a single species. Speciation in our study case is probably constrained by the limitation on activity, mating and reproduction of supratidal snails, such that their populations can only be sustained through intertidal pelagic larval recruitment. Comparisons with other studies suggest that supratidal speciation and specialization for life in this zone probably require moderation of the abiotic (desiccative) conditions, to facilitate greater activity and interaction of animals during air exposure.
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Carpenter, L. J., K. Hebestreit, U. Platt, and P. S. Liss. "Coastal zone production of IO precursors: A 2-dimensional study." Atmospheric Chemistry and Physics Discussions 1, no. 1 (September 3, 2001): 193–220. http://dx.doi.org/10.5194/acpd-1-193-2001.
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Abstract. At Mace Head, Eire, in the coastal East Atlantic, diiodomethane has been identified as an important precursor of iodine oxide radicals. Peak concentrations of both CH2I2 and IO at low water indicate that the intertidal region is a strong source of organoiodines. Atmospheric measurements of CH2I2 made in marine air are used in conjunction with a 2-dimensional model incorporating horizontal and vertical dispersion to provide estimates of the intertidal and offshore fluxes of CH2I2 upwind of Mace Head. The strong signature of photolysis in the CH2I2 observations indicates that the emissions are not entirely local/coastal, but must include an additional offshore source. Good agreement between model and measured CH2I2 concentrations is achieved with an offshore flux of 2 × 104 molecules cm-2 s-1 and an intertidal flux ranging from 1.3 × 109 molecules cm-2 s-1 (low water) to 6.5 × 108 molecules cm-2 s-1 (high water), the latter over a 100 m wide coastal belt. The coastal emissions at low water are in good agreement with independent estimates made from seaweed emission data. We estimate that, although intertidal emissions are ~4 orders of magnitude higher than those offshore, their contribution to the measured CH2I2 concentrations at 10 m height is only ~50%.
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Waller, Catherine L. "Zonation in a cryptic Antarctic intertidal macrofaunal community." Antarctic Science 25, no. 1 (October 23, 2012): 62–68. http://dx.doi.org/10.1017/s0954102012000867.
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AbstractDespite the general view that the Antarctic intertidal conditions are too extreme to support obvious signs of macrofaunal life, recent studies have shown that intertidal communities can survive over annual cycles. The current study investigates distribution of taxa within a boulder cobble matrix, beneath the outer, scoured surface of the intertidal zone at Adelaide Island, west Antarctic Peninsula. The intertidal zone at the study sites comprised compacted, flattened cobble pavements, which have been shown to be highly stable over time. Community structure was investigated using univariate and multivariate approaches. Virtually no macrofauna were present on the outer surface, but richness, diversity, abundance and size of animals increased with depth into the rock matrix. Abundance of taxa increased by an order of magnitude between the outer surface and the lowest level sampled. These findings show that the Antarctic intertidal is not always the uninhabitable environment currently perceived, and that under these highly variable environmental conditions at least some species have the capacity to survive.
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Choi, Sun Kyeong, Tae Hyeon Kim, Yun Hee Kang, Sangil Kim, Tae-Hoon Kim, Jang Kyun Kim, Taehee Lee, Young Baek Son, Hyuk Je Lee, and Sang Rul Park. "Changes in the Dynamics and Nutrient Budget of a Macroalgal Community Exposed to Land-Based Fish Farm Discharge Off Jeju Island, Korea." Sustainability 13, no. 21 (October 26, 2021): 11793. http://dx.doi.org/10.3390/su132111793.
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This study aimed to investigate the dynamics of the nutrient budget of a macroalgal community exposed to water discharged from aquaculture farms. This study was conducted in the coastal area exposed to water discharged from aquaculture farms located on Jeju Island, Korea, in May and October of 2017. Water-column-dissolved inorganic nutrient concentrations were higher in the intertidal zone than in the subtidal zone. High nutrient concentrations in the intertidal zone resulted in the bloom of Ulva spp., consequently leading to a low species number. This indicates the vulnerability of the intertidal macroalgal community to discharge from land-based aquaculture. Ecklonia cava contributed to 29–53% of the total incorporation of carbon (C), nitrogen (N), and phosphorus (P) in the subtidal zone. In the intertidal zone, the highest tissue N content was found in Ulva spp. due to the high and rapid nutrient uptake rate from the effluent with high nutrient concentrations, thereby indicating high total N incorporation. The estimated total C, N, and P incorporation rates by macroalgae were 181.5, 8.6, and 0.95 tons year−1, respectively. These results suggest that the macroalgal community in this area absorbs or removes large amounts of nutrients from the water column and plays an important role in the budgets and cycling of nutrients in the surrounding coastal areas.
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Lesti, Herin Yoga, Syifa Evilia Maharani, Naila Nabila Rahmani, Fania Baeta Roska Khalallia, Ni Made Sri Winasti, Achmad Mustofa Huda, Septi Lutfiatun Nafiah, and Rury Eprilurahman. "Diversity of Echinoderms in Intertidal Zone of Sundak Beach, Gunung Kidul, Yogyakarta, Indonesia." BiosciED: Journal of Biological Science and Education 2, no. 1 (June 21, 2021): 1–9. http://dx.doi.org/10.37304/bed.v2i1.2626.
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Indonesia is a maritime country with high diversity of marine biota, which one is from Phylum Echinoderms. Echinoderms are known as biota of marine which is are living on corals, sandy, and on the intertidal zone and deep ocean. The intertidal characteristics of Sundak Beach has a suitable structure to echinodems life because there are many corals, but there is many species has not been identified before. The purpose of this research is to know the diversity of echinoderms phylum on the intertidal zone. Sampling was carried out on August, 24th 2019 with purposive random sampling method along the coastal-line in intertidal zone. The result of this research are identified and classified on the each class. Based on the results, the are found species from Echinodea, Holothuroidea, and Ophiuroidea. Species from Echinoidea are Tripneustes gratilla, Echinometra mathaei, Heterocentrotus trigonarius, Diadema antillarum., and Echinothrix calamaris. Holothuroidea namely Holothuria atra. Ophiuroidea namely Ophiotrix fragilis, Ophiocoma scolopendrina, and Ophiocoma erinaceus. The conclusion from this study is the discovery of five species from class Echinoidea, one species from class Holothuroidea and three species from class Ophiuroidea.
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Chelchowski, Maciej, Piotr Balazy, Katarzyna Grzelak, Lukasz Grzelak, Monika Kędra, Joanna Legezynska, and Piotr Kuklinski. "Vertical zonation of benthic invertebrates in the intertidal zone of Antarctica (Admiralty Bay, King George Island)." Antarctic Science 34, no. 1 (October 27, 2021): 29–44. http://dx.doi.org/10.1017/s095410202100047x.
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AbstractThe Antarctic Peninsula is undergoing rapid change due to global warming, including air and water temperature increases. Fauna inhabiting the intertidal zone are particularly exposed to warming impacts, as they are subjected to high variations in both terrestrial and marine environmental settings. This study aimed to assess intertidal macrofaunal and meiofaunal biodiversity, tidal height-related assemblage structural patterns and their responses to variability in environmental parameters on King George Island. A total of 39 macrofaunal taxa were identified, with polychaetes and amphipods being the most diverse groups and gastropods, amphipods and bivalves being the most abundant. In the case of meiofauna, 16 taxa were found, mainly nematodes, copepod nauplii and harpacticoids. There was a significant decrease in the number of species, abundance and biomass for both macrofauna and meiofauna with increasing tidal height. Our investigation documented highly diverse and abundant fauna in the Antarctic intertidal zone. With its thriving life, it could serve as a perfect model system for detecting climate change impacts on local biodiversity. Therefore, we propose the Antarctic intertidal zone as a suitable habitat for monitoring these changes.
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Fredriksen, Aurora. "Encounters in the ebb and flood: Knowing marine ecologies in the intertidal contact zone." Environment and Planning E: Nature and Space 2, no. 4 (October 1, 2019): 761–80. http://dx.doi.org/10.1177/2514848619833909.
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Shifting rhythmically between land and sea with the ebb and flood tides, shores are places where humans and nonhumans encounter one another in ambivalent relations of deep familiarity and enduring strangeness. In this article, I use the space of the intertidal contact zone to think through a series of uneven encounters between humans and marine wildlife that populate a dispute over tidal energy testing in the Bay of Fundy's Minas Passage. I trace two contact zones through which knowledge about marine wildlife in the Bay of Fundy is generated: first, the contact zone continually (re-)assembled through the encounters of small-scale and traditional fishers with marine wildlife, and second, the contact zone staged in remote encounters between marine scientists and marine wildlife. The article reflects on the role of bodies in and out of encounter in the different ways of knowing about marine wildlife in this case and considers ethical possibilities and limits of knowing through, versus without, contact with nonhuman animals in the intertidal contact zone.
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Saha, Tumpa, and Subrota Kumar Saha. "Systematics of Modern Benthic Foraminiferal Assemblages From the Deltaic Mangrove Ecosystem of Sundarbans." Journal of the Asiatic Society of Bangladesh, Science 47, no. 2 (December 31, 2021): 121–36. http://dx.doi.org/10.3329/jasbs.v47i2.57276.
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The contemporary intertidal foraminifera and estuarine environment information were collected from the four sites adjoining the deltaic mangrove environment in the Sundarbans. The marsh zones of the south-western coastal region of Bangladesh were examined for modern benthic foraminifera and to expound on the relationship of the foraminiferal assemblages with the environment. Due to high inaccessibility and remoteness, the taxonomic study of foraminifera and its depositional environment remains largely overlooked in the Sundarbans of Bangladesh. This study includes a detailed survey of depositional environment of these fluvio-deltaic to shallow marine sediments. The seventeen species belonging to fourteen genera representing nine families were recorded from surficial sediment of supratidal, intertidal, and dune environment of Kotka, Jamtala, Kochikhali, and Dimer char area. In the present study, these foraminiferal assemblages are characterized calcareous and agglutinated foraminifera. The Kotka beach is recognized as Nonionina assemblage zone, Jamtala beach designated as Ammonia assemblage zone, Kochikhali as Nonionina assemblage zone and Dimer char as Rosalina-Nonionina-Nonionella assemblage zone. The deposition of foraminifera is restricted to Sundarbans’ low to high marsh zone. J. Asiat. Soc. Bangladesh, Sci. 47(2): 121-136, December 2021
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Pangandaheng, Romel A., Nego E. Bataragoa, and Jhon L. Tombokan. "Fish Species and Abundance in the Intertidal Zone around UNSRAT Marine Station, East Likupang District, North Minahasa Regency." JURNAL ILMIAH PLATAX 6, no. 1 (January 30, 2018): 107. http://dx.doi.org/10.35800/jip.6.1.2018.18907.
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Fish migration to the intertidal zone at high tide is for feeding, reproduction, escape from predator. The study was aimed to know the fish species inhabiting the intertidal zone, the individual abundance and fish catch biomass. Sampling was done at high tide in the afternoon and morning in new moon and full moon. Five sampling stations were selected and each station was sampled twice, so that total number of samplings were 10. This study used swept area method and covered a total area of 12,000/m2 (6,000m2 in new moon and full moon, respectively. Individual abundance of each species ranged from 0.0002 to 0.0120/ at new moon and from 0.00012 to 0.0102/ at full moon, respectively, and total abundance ranged from 0.0001 to 0.0111/ in both moon phases. The biomass of each species on the new moon 0.0003t o 0.1749g/ , full moon 0.0009 to 0.1224g/ , and the amount of biomass between the new moon and the full moon 0.0002 to 0,1329g/ .Keywords: Fish, migration, intertidal, reproduction.AbstrakIkan bermigrasi ke dalam zona intertidal pada saat air pasang adalah untuk mencari makan, bereproduksi, dan menghindar dari predator. Tujuan penelitian ini adalah untuk mengetahui spesies-spesies ikan yang ada didaerah intertidal dan mengetahui kelimpahan individu dan biomasa ikan yang tertangkap di daerah intertidal. Pengambilan sampel dilaksanakan pada ketika air pasang pada sore dan pagi hari setiap fase bulan baru dan purnama. Ditetapkan lima stasiun sampling dan setiap stasiun dilakukan dua kali sampling, sehingga jumlah sampling dalam lima stasiun 10 kali sampling. Dengan metode penelitian yang digunakan adalah metode swept area (daerah sapuan). Luas daerah sapuan pukat dalam 10 kali sampling adalah 12.000/m2 (6.000m2 pada bulan baru dan bulan purnama), Kelimpahan individu setiap spesies pada bulan baru berkisar antara 0,0002-0,0120/ , bulan purnama 0,00012-0,0102/ , dan jumlah kelimpahan antara bulan baru dan purnama 0,0001-0,0111/ . Kelimpahan biomasa setiap spesies yang paling melimpah pada bulan baru 0,0003-0,1749g/ , bulan purnama 0,0009-0,1224g/ , dan jumlah biomasa antara bulan baru dan purnama 0,0002-0,1329g/ ..Kata kunci : Ikan, bermigrasi, intertidal, reproduksi
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Aldana, Marcela, Diego Maturana, José Pulgar, and M. Roberto García-Huidobro. "Predation and anthropogenic impact on community structure of boulder beaches." Scientia Marina 80, no. 4 (November 22, 2016): 543. http://dx.doi.org/10.3989/scimar.04444.27a.
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Predator impacts on intertidal community structure have been studied for rocky platforms, but intertidal boulder fields, a habitat with a greater extension and heterogeneity, have not yet been considered. Keeping in mind that disturbances are considered an important force in determining intertidal habitat diversity, the aims of this work were to describe and quantify boulder field community structure and to assess boulder field community dynamics by proposing possible food webs, taking into consideration predatory and anthropogenic impacts. These aims were achieved by installing predator-exclusion cages outfitted with rocks that were monitored monthly over one year in two study zones, a Management and Exploitation Area for Benthic Resources (MEABR, Playa Chica) and open-access area (OAA, Playa Grande). For both study zones, juveniles were the dominant observed ontogenetic state and invertebrate richness and density were higher inside exclusion cages. Furthermore, the MEABR had a differentiated impact on community structure and dynamics in comparison with the OAA. In conclusion, the roles played by boulder fields in intertidal diversity, especially in recruitment and as a nursery zone, are important to consider in management plans.
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Masi, Bruno Pereira, Isabela Maria Macedo, and Ilana Rosental Zalmon. "Annual and spatial variation of intertidal benthic community zonation in a breakwater off the Rio de Janeiro coast, south-eastern Brazil." Journal of the Marine Biological Association of the United Kingdom 89, no. 2 (March 2009): 225–34. http://dx.doi.org/10.1017/s0025315408003032.
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The present study aims to evaluate the vertical distribution of intertidal benthic organisms in different periods of the year, relating them to tide, air temperature, height and wave periodicity in breakwaters off the northern Rio de Janeiro State, and to compare the zonation at two sites (Pier and Barra) with distinct hydrodynamics, due to different wave swell. Quadrats of 400 cm2 were sampled by a photoquadrat method. The upper limit of the marine organisms was higher at the Barra site (intertidal zone of 3.8 m) than at the Pier site (intertidal zone of 2.2 m). The littoral fringe assemblage did not show significant differences between sites, but a larger range of this fringe and the upper eulittoral band at Barra was quite evident. This site was mostly characterized by species of more exposed areas such as Chaetomorpha sp. and Perna perna in the upper and lower eulittoral bands, and by C. teedii and Ulva fasciata in the sublittoral fringe. A seasonal difference was identified in the air exposure degree at the Pier site, which was higher in October 2005 and February 2006. The air temperature and wave height and periodicity differed significantly among the four studied periods. The typical seasonal species were F. clenchi (July 2005 and October 2005), Gigartina domingensis (July 2005), Grateloupia sp. (October 2005) and Porphyra acanthophora (October 2005 and February 2006). The intermediate benthic band of the intertidal zone occupied a narrow zone, changing its spatial location according to the season of the year. The hypothesis of annual variation of the benthic community zonation according to the seasonal variability of tides, air temperatures and wave's height and periodicity was accepted for the intermediate band of the intertidal zone, due to the taxonomic differences and the abundance of dominant species in the four seasons. The difference in the vertical distribution of the intertidal benthic assemblages of both breakwaters highlights a distinct wave exposure condition, and reflects the breakwaters' orientation and the wave swell at each site.
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Ingólfsson, A., and I. Agnarsson. "Anonyx sarsi: a major unrecognized scavenger and predator in the intertidal zone." Journal of the Marine Biological Association of the United Kingdom 79, no. 6 (December 1999): 1127–28. http://dx.doi.org/10.1017/s002531549900140x.
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Anonyx sarsi (Crustacea: Amphipoda) is a widely distributed scavenger and predator in shallow waters of northern seas. It was caught, often in large numbers, in baited traps in the intertidal in Iceland, especially during mid-winter. Although hitherto only sporadically recorded from the intertidal, the species is undoubtedly among the most important carrion feeders there, and probably an important predator as well.
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Q Q, Han, and Niu Z G. "China Intertidal Zone Dataset Based on Tidal Correction." Journal of Global Change Data & Discovery 3, no. 1 (2019): 42–47. http://dx.doi.org/10.3974/geodp.2019.01.06.
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Morgan, Steven G., Alan L. Shanks, Jamie H. MacMahan, Ad J. H. M. Reniers, and Falk Feddersen. "Planktonic Subsidies to Surf-Zone and Intertidal Communities." Annual Review of Marine Science 10, no. 1 (January 3, 2018): 345–69. http://dx.doi.org/10.1146/annurev-marine-010816-060514.
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