Phytoplankton assemblage and restricted bloom of Merismopedia sp. (Meyen, 1839) in an anthropogenically stressed tropical estuary (Ulhas estuary), India

IF 2.9 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Environmental Monitoring and Assessment Pub Date : 2025-03-17 DOI:10.1007/s10661-025-13888-9

Soumili Paul, C. K. Haridevi, Swarnendu Bera, Revati Hardikar, Sayyed Ariba Fatima

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Abstract

The present study evaluates the effect of nutrients and their spatio-temporal variation in determining the composition of phytoplankton assemblage. The study recorded the restricted bloom of Merismopedia sp. (Meyen, 1839) in the upstream stations U7 and U8 during post monsoon. The study identified high concentration of ammonia and silicate promoted the proliferation of Merismopedia sp. while salinity and nitrate served important roles in the restriction of this genus to meso-oligohaline region. Shannon-Weiner diversity index as pollution index suggested that mid to upstream of the estuary in post monsoon was moderately polluted, which transformed to marginally polluted in pre monsoon season. The study could identify opportunistic species like Thalassiosira sp. in midstream and Merismopedia sp. in upstream of the estuary which outnumbered and led to low diversity index at these zones.

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来源期刊

Environmental Monitoring and Assessment 环境科学-环境科学

CiteScore

4.70

自引率

6.70%

发文量

1000

审稿时长

7.3 months

期刊介绍： Environmental Monitoring and Assessment emphasizes technical developments and data arising from environmental monitoring and assessment, the use of scientific principles in the design of monitoring systems at the local, regional and global scales, and the use of monitoring data in assessing the consequences of natural resource management actions and pollution risks to man and the environment.