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首页> 外文期刊>Indian Journal of Fisheries >Biodiversity and community structure of coral reefs around Krusadai Island, Gulf of Mannar, India
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Biodiversity and community structure of coral reefs around Krusadai Island, Gulf of Mannar, India

机译：印度马纳尔湾Krusadai岛周围的珊瑚礁生物多样性和群落结构

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摘要

This paper gives the results of the surveys conducted in the Krusadai Reef for the assessment of the coral cover and biodiversity during March-May 2005, following the Line Intercept Transect Method. A total of 35 hard coral species were recorded in this reef. The total live, dead and bleached coral cover for the reef as a whole was estimated as 54.9,18.7 and 15.4% respectively and the remaining part was covered with soft corals, sponges, seagrasses, sand and rubble. Dead coral cover was dominated byporites. Further, relative abundance values were derived for each species and they were assigned the status dominant/ abundant/ common/ uncommon/ rare. Although, no species was assigned "dominant" status, Acropora formosa belonged to the category "abundant" and all other species were either of "common" or "uncommon" status only. Fisher a and Shannon diversity indices were highest (3.68 and 2.14 respectively ) in 8th site. Pielou's evenness was highest in 7th site. SIMPER analysis revealed that Acroporaformosa (33.95%) along with Acropora humilis (15.85%), Porites mannarensis (12.97%) and Montipora digitata (12.07%) were responsible for dissimilarity among various sites in the island. The average similarity in species composition was 20.5%.
机译：本文给出了线截断法在克鲁萨达礁进行的调查结果，以评估2005年3月至5月的珊瑚覆盖率和生物多样性。在该礁中总共记录了35种硬珊瑚物种。整个珊瑚礁的活，死和漂白珊瑚总覆盖率分别估计为54.9％，18.7％和15.4％，其余部分覆盖着软珊瑚，海绵，海草，沙子和瓦砾。死珊瑚覆盖物以多孔岩为主。此外，得出了每个物种的相对丰度值，并为它们指定了优势/丰富/常见/罕见/稀有状态。尽管没有任何物种被赋予“显性”状态，但“福尾棘”属于“丰富”类别，而其他所有物种仅处于“常见”或“罕见”状态。 Fisher多样性指数和Shannon多样性指数最高（分别为3.68和2.14）在第8个站点。 Pielou的均匀度在第七位最高。 SIMPER分析显示，鹿角形纲（33.95％）以及鹰嘴形角纲（15.85％），曼纳斯（Porites mannarensis）（12.97％）和趾骨Montipora指形纲（12.07％）是造成岛上各个地点之间差异的原因。物种组成的平均相似度为20.5％。

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