Influence of environmental parameters on the distribution and diversity of molluscan composition in pondicherry mangroves,southeast coast of India |
| |
| Authors: | Palanisamy Satheeshkumar Anisa Basheer Khan |
| |
| Institution: | 1.Central Marine Fisheries Research Institute,Kochi,India;2.Department of Ecology and Environmental Sciences,Pondicherry University,Puducherry,India |
| |
| Abstract: | Seasonal variation in the distribution of mollusks in relation to environmental parameters was studied at four mangrove stations
on the Pondicherry coast during September 2008–August 2009. A total of 37 species of molluscs were recorded, among them 16
species of bivalves belonging to 7 families and 12 Genera, and 21 species of gastropods belonging to 14 families and 19 Genera,
with the Cereithedia cingulata being the dominant group. An increase of species density and diversity in the Post monsoon season was observed, with the
highest values for both indexes at stations 1 and 2, and the lowest at stations 3 and 4 fine where the sand assemblage was
dominated by a few gastropods. Pollution indicator species Cassidula nucleus, Melampus ceylonicus, Sphaerassiminea minuta were found only in highly polluted regions near stations 3 and 4; they were totally absent in moderately polluted areas near
stations 1 and 2. From a stepwise multivariate analysis of the different environmental parameters regarding molluscan density,
it was found that in all 10 parameters govern the density variation of benthic mollusks in Pondicherry mangroves and that
the organic matter of sediment and sulphide, DO, and salinity were the highly significant ones. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
