%0 Journal Article
%T Rotifera diversity of a floodplain lake of the Brahmaputra river basin of lower Assam, Northeast India
%A Sharma
%A B.K.
%A Sharma
%A S.
%J Opuscula Zoologica Instituti Zoosystematici et Oecologici Universitatis Budapestinensis
%D 2012
%I E?tv?s Lor芍nd University
%X This study analyzed diversity and ecology of planktonic Rotifera of Ghorajan beel, a floodplain lake of the Brahmaputrariver basin of lower Assam region of Northeast India. Plankton samples collected (January每December, 2010) fromlittoral (station 1) and semi-limnetic regions (station 2) of this tropical wetland revealed a fairly rich rotifer fauna (84 and 80species) with distinct variations (range, average ㊣ SD) in monthly richness (35每55, 46㊣6 and 24每54, 36㊣5 species) andcommunity similarities (46.6每80.4 and 37.0每95.9 %) at both sampling stations. The richness followed unclear annual patterns.The rotifers mainly contributed (53.3㊣5.1 and 55.6㊣ 3.6 %) to zooplankton abundance variations and showed high abundancefrom June through November at both stations. Brachionidae > Lecanidae exhibited high number of individuals; Asplanchnidaeand Flosculariidae were also quantitatively important families; specifically, Asplanchna priodonta, Sinantherina socialis, Brachionusfalcatus and Lecane bulla were important species for their abundance. Single abiotic factors exerted a more limited influence on richness than on abundance. Canonical correspondence analysis (CCA) explained 55.6 % and 59.5 % cumulative variance of the rotifer assemblages along axis 1 and 2, respectively; the CCA indicated the importance of transparency and rainfall at station 1, and of transparency, dissolved oxygen and rainfall at station 2. Consequently, the littoral and semi-limnetic stations are characterized by micro-environmental differences.
%K Rotifera abundance
%K Assam
%K diversity indices
%K ecology
%K 
%K richness
%K tropical wetland
%U http://opuscula.elte.hu/PDF/Tomus43_1/Sharma.pdf