EN
Phytoplankton diversity of a de-mineralized subtropical reservoir of Meghalaya state, northeast India
Abstract
This study monitors the spatio-temporal variations of phytoplankton of a soft-water and de-mineralized reservoir of Meghalaya state of northeast India. Phytoplankton assemblages of the littoral and limnetic regions reveal total 36 species and diverse desmids, and contribute dominantly to net plankton abundance. Our results record the quantitative importance of Charophyta > Bacillariophyta > Dinophyta and Charophyta > Dinophyta, and the ‘specialist’ nature of 11 and six species at the littoral and limnetic regions, respectively. Staurastrum spp. and Cosmarium spp. are notable taxa. Phytoplankton indicates moderate species diversity and depicts dominance and evenness variations. The individual abiotic factors exert differential influence on various taxa at the two regions and the canonical correspondence analysis registers 73.02 and 71.14% cumulative influence of 10 abiotic factors on the littoral and limnetic assemblages, respectively. The spatial differences of phytoplankton composition, richness, abundance, important groups and taxa, specialist species, diversity indices and the influence of individual abiotic factors are hypothesised to habitat heterogeneity amongst the sampled regions. This study records notable temporal differences of phytoplankton richness, abundance, diversity and the role of abiotic factors vis-a-vis the limited survey of November 1990–October 1991.
Keywords
Supporting Institution
North-Eastern Hill University
Thanks
The senior author thanks the Head, Department of Zoology, North-Eastern Hill University, Shillong for laboratory facilities and to various research students for the field work help on several occasions.
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Details
Primary Language
English
Subjects
Hydrobiology
Journal Section
Research Article
Publication Date
July 1, 2021
Submission Date
October 18, 2020
Acceptance Date
January 13, 2021
Published in Issue
Year 1970 Volume: 4 Number: 3