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首页> 外文期刊>International Journal of Marine Science >Distribution and Diversity of Intertidal Macrofauna of Dharmadam Beach, South West Coast of India
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Distribution and Diversity of Intertidal Macrofauna of Dharmadam Beach, South West Coast of India

机译：印度西南海岸Dharmadam海滩潮间带大型动物的分布和多样性

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This contribution presents the abundance and diversity of macrofauna in the pristine intertidal regions of Dharmadam beach along the Kerala coast (South West coast of India) during August 2009 to January 2011.The width of the beach is 15-30m, which alternates according to the tidal height. Environmental parameters like salinity, nutrients, conductivity and total dissolved salts analyzed exhibited significant correlation with macrofauna that dwells in the habitat. Gastropods (45.54%), polychaetes (10%), tanaids (43.4%) dominated in the present study. The monthly variations in abundance were displayed by dominant faunal species in various stations but did not show any seasonal variations except that of Emerita holthuisi , which was observed only in pre monsoon (Feb-May) and monsoon (Jun-Sep) months. Analysis of community indices showed monthly variations in species diversity. The peak mean species diversity was observed in station 1 in May, 2009 and Station 2 in December, 2009 and January, 2010.The spatial distribution of some organisms were not even in the study area. The sparse distribution, low richness and higher dominance of organisms were the characteristic feature of community structure. The dissimilarity trend of organisms like polychaetes, gastropods and total groups were discernible by MDS plotting. It best explained the dominance of polychaetes and gastropods on the beach. Assessing the correlation of water quality parameters to the fauna residing in study area BEST (Bio-Env + Stepwise) analysis was done and salinity showed more significance towards fauna. Draftsman plot were also done to observe the interactions of organisms. The highest correlation has been showed by barnacles and gastropods (0.825).The present study discussed the interaction of organisms in the selected habitat with environmental factors prevailing there along with the diversity and abundance.
机译：该贡献显示了从2009年8月到2011年1月，喀拉拉邦海岸（印度西南海岸）的达摩达姆海滩原始潮间带的大型动物多样性。海滩的宽度为15-30m，根据潮高。所分析的盐度，养分，电导率和总溶解盐等环境参数与栖息于栖息地的大型动物表现出显着的相关性。在本研究中，腹足纲动物（45.54％），多毛类动物（10％），奇异鸟类动物（43.4％）占主导地位。在各个站点上，优势动物种类显示了每月的丰度变化，但除Emerita holthuisi外，没有其他任何季节变化，仅在季风前（二月至五月）和季风（六月至九月）观察到。社区指数分析显示物种多样性每月变化。在2009年5月的第1站，2009年12月的第2站和2010年1月的第2站观测到平均物种多样性峰值。研究区域内某些生物的空间分布甚至不均。群落的稀疏分布，丰富度低和优势度高是群落结构的特征。通过MDS绘图可以看出多壳动物，腹足动物和总群体等生物的差异趋势。它最能解释海滩上多壳类和腹足类动物的优势。评估了水质参数与研究区域内动物区系的相关性（生物环境+逐步分析），盐度对动物区系具有更大的意义。还绘制了绘图员图以观察生物体的相互作用。藤壶和腹足纲动物之间的相关性最高（0.825）。本研究讨论了所选生境中生物与环境中普遍存在的环境因素以及多样性和丰度之间的相互作用。

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