Latha C, Thanga V Salom Gnana
Department of Environmental Sciences, University of Kerala, Kariavattom, Thiruvananthapuram - 695 581, India.
J Environ Biol. 2010 Jul;31(4):543-7.
The diversity and distribution pattern of benthic macroinvertebrates in two backwaters viz., Veli and Kadinamkulam of Kerala were assessed using diversity indices. The samples were collected once in three months for a period of two years from six sampling sites (K1, K2, K3, V1, V2 and V3) and community variations were analyzed. Overall, 24 families were identified represented by mollusca, annelida and arthropoda (crustaceans and insects). Among this, dominant taxon was Mytilidae of molluscan family and site-wise dominance was maximum in sites V1 and V2. Richness and abundance were highest in site V2 and lowest in site K2. Diversity index ranged from 0.27 (K2) to 2.33 (V1). The diversity and distribution patterns of certain species were clearly related to water quality as evident from the present study.
利用多样性指数评估了喀拉拉邦两个回水区域（即韦利和卡迪纳姆库勒姆）底栖大型无脊椎动物的多样性和分布模式。在两年时间里，每三个月从六个采样点（K1、K2、K3、V1、V2和V3）采集一次样本，并对群落变化进行了分析。总体而言，共鉴定出24个科，它们分别属于软体动物门、环节动物门和节肢动物门（甲壳类和昆虫）。其中，优势类群是软体动物门的贻贝科，在V1和V2采样点的优势度最高。丰富度和丰度在V2采样点最高，在K2采样点最低。多样性指数范围为0.27（K2）至2.33（V1）。从本研究可以明显看出，某些物种的多样性和分布模式与水质明显相关。
