Seasonal Variation of Physico-Chemical Parameters and Their Influence on Phytoplankton Community of Muthupet Estuary, Southeast Coast, Tamil Nadu, India

Autor: B. Bharath, C. Venkatraman, K. Perinbam, A. Suganthi
Rok vydání: 2020
Předmět:
Zdroj: Advances in Zoology and Botany. 8:122-131
ISSN: 2331-5091
2331-5083
DOI: 10.13189/azb.2020.080307
Popis: Physico-chemical parameters of freshwater are most important factor for diversity and density of phytoplankton community. Hence, the present study was intended to evaluate the seasonal variation on physico-chemical parameters such as rainfall, temperature, pH, salinity, dissolved oxygen and their relationship with phytoplankton community of Muthupet estuary. The seasonal variation of nutrients like nitrate, phosphate and silicate was recorded to determine the utilization of nutrients by phytoplanktons in aquatic environment. The results exposed that physico-chemical parameters showed significant difference among the seasons. The nutrient dynamic of Muthupet estuary exhibits considerable seasonal variation due to the rainfall and nutrient utilization of autotrophs. There are totally 14 species of phytoplankton under three different groups namely Bacillariophyceae, Dinophyceae and Cyanophyceae was recorded. The highest phytoplankton density was recorded during summer season (18541.67b ± 3934.52/m3), while lower in monsoon seasons. The statistical analysis of physico-chemical parameters showed significant variation among seasons and the diversity indices of phytoplankton were high during post monsoon for both Simpson and Shannon indices and also on Evenness. The correlation analysis exposed that physico-chemical parameters and nutrients are effective dynamics to control the seasonal variations on phytoplankton diversity. Therefore, the present study reveals that Muthupet estuary has rich in phytoplankton community due to presence of high nutrient content and consisting of appropriate environmental factors.
Databáze: OpenAIRE
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