Impact of Jute Retting on Phytoplankton Diversity and Aquatic Health: Biomonitoring in a Tropical Oxbow Lake

Ghosh, Dipankar

doi:10.12911/22998993/60449

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…The poor health status assessed with the physicochemical properties does also corroborate with the findings of the studies on the same oxbow lake assessed with diversity indices of rotifer (Ghosh and Biswas, 2014), zooplankton (Ghosh and Biswas, 2015a), macroinvertebrates (Ghosh and Biswas, 2015b), macrophytes (Ghosh and Biswas, 2015d), phytoplankton (Ghosh and Biswas, 2015e), fish diversity (Ghosh and Biswas, 2017a;2017c), fish productivity (Ghosh and Biswas, 2017b;2017d) and physicochemical studies (Ghosh and Biswas, 2017e; undertaken during the same period of study in the same oxbow lake.…”

Section: Biodiversity and Productivitysupporting

confidence: 78%

“…Physicochemical parameters were monitored as per Ghosh and Biswas (2017e;. Biological parameters viz., phytoplankton (Ghosh and Biswas, 2015e), zooplankton (Ghosh and Biswas, 2014;2015a), macroinvertebrates (Ghosh and Biswas, 2015b;2017e), macrophytes (Ghosh and Biswas, 2015d), fishing gears and diversity (Ghosh and Biswas, 2017a;2017c) were monitored. Fish sampling and assessment of productivity were carried out as per Ghosh and Biswas (2017b;2017d).…”

Section: Physicochemical Biological and Socio-ecological/ Economicalmentioning

confidence: 99%

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Aquatic health indicators: holistic evaluation tools for sustainable management of a tropical oxbow lake ecosystem

Ghosh¹,

Biswas²

2018

Indian J. Fish.

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Quantitative relationship of primary productivity and fish productivity and estimating aquatic health indices in tropical oxbow lake ecosystems remains to be addressed as predictors of fisheries yield in sustainable management. The aquatic health indicators and aquatic health status assessed with biological properties of phytoplankton, zooplankton, macroinvertebrates, macrophytes and fish in a semi-closed tropical oxbow lake ecosystem in the eastern India were studied along with socioecological and socio-economical aspects. Five ecological classes namely phytoplankton, zooplankton, macroinvertebrate, macrophyte and fish have been championed as effective biological indicators supported by physicochemical attributes. The established aquatic health indices registered the health status as moderate to poor. Organic loading and consequent nutrient enrichment and water quality deterioration during monsoon led to more homogeneous benthic biotic assemblage. With observed diverse nature of each trophic level of the ecosystem, there occurred a downstream ‘spillover’ of diversity along the food chain. The ‘structure affecting structure’ argument goes in tune with the theory of consumers controlling species diversity. Total 38 fish productivity regression equation models explained clearly that fish abundance and productivity were declining due to high anthropogenic activities of jute retting and indiscriminate uses of fishing gears of various mesh sizes during monsoon and thereafter, which need to be regulated.

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Section: Biodiversity and Productivitysupporting

confidence: 78%

Section: Physicochemical Biological and Socio-ecological/ Economicalmentioning

confidence: 99%

Aquatic health indicators: holistic evaluation tools for sustainable management of a tropical oxbow lake ecosystem

Ghosh¹,

Biswas²

2018

Indian J. Fish.

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“…Lower fish diversity indices (values of SWI and Simpson diversity index) showed the bad to poor health status of the Oxbow lake and it was subjected to high anthropogenic pressure and pollution and was not suitable for fish growth. This pollution status concurred when assessed with diversity indices of rotifer [46], zooplankton [47], macroinvertebrates [48], macrophytes [49], phytoplankton [50], and fish diversity and productivity [28,29]. Due to lack of previous information on fish diversity from this Oxbow lake it is not possible to quantify the rate of decline in fish and since this Oxbow lake lacks earlier such database to compare the impact of pollution over the years, this first ever study of its kind conducted may serve the baseline data for quantitative and comparative bioassessment of native fin fish for the future studies in the years to come.…”

Section: Discussionmentioning

confidence: 58%

Fish Fauna Faces Anthropogenic Double Trouble: Erosion of Fish Diversity in Tropical Oxbow Lake of the Ganga River Basin in Eastern India

Ghosh¹,

Biswas²

2017

J Biodivers Endanger Species

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Fish diversity in Oxbow lake is adversely impacted due to diverse anthropogenic activities like over-exploitation, indiscriminate use of fine meshed fishing gears, jute retting etc. To quantify the impact of such anthropogenic activities on fish diversity and aquatic health, a survey with seasonal analysis of diversity indices, relative frequencies and abundance status of native fish populations was conducted from April 2013 to March 2014 in a semi closed Oxbow lake in Nadia district in eastern India. The level of p<0.05 was accepted as statistical significance. Of the 33 native fish species recorded 33% belonging to 8 orders and 17 families fell under vulnerable or endangered categories. Native species like Amblypharyngodon mola, Chanda nama, Pethia ticto and Notopterus notopterus, Colisa fasciata, P. ticto, were the most dominant and frequent fishes. Shannon-Weiner diversity index was decreased by 41% by precipitating impact of monsoonal anthropogenic activities during post-monsoon. Low native fish diversity indices are pointers to poor ecosystem health status owing to intense adverse activities like jute retting, indiscriminate fishing aggravated by influx of turbid water from the river Ganga following episodic flood events during monsoon. Regulation and prevention of such anthropogenic activities are urgently warranted for sustainable conservation and management of the Oxbow lake.

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“…The total phytoplankton density was found maximum during monsoon which might be due to high nitrate concentration. The nitrate concentration might be due to agricultural runoff and jute retting at that time (Ghosh and Biswas, 2015).The lowest abundance of phytoplankton abundance during post-monsoon due to the considerablepresence of macrophytes at that time (Gogoi et al, 2021c).…”

Section: Plankton Composition and Distributionmentioning

confidence: 99%

Seasonal influence of physicochemical and climatic parameters on phytoplankton diversity and abundance pattern in community managed semi- impacted floodplain wetland

Das,

Mohanty,

Bhattachaya

et al. 2024

Preprint

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Wetlands provide numerous ecological services and are key habitats for aquatic flora and fauna. In the Beledanga wetland, the current study was conducted for three years, from July 2019 to June 2021, to evaluate the seasonal influence of physico-chemical parameters on phytoplankton diversity and abundance patterns. Overall 48 phytoplankton taxa were observed. Group Bacillariophyceae (27%) contributed the maximum to the total phytoplankton density. The total abundance of phytoplankton was found utmost during monsoon (4.081×103 unit l-1 ) and least during post-monsoon (3.316×103 unit l-1). One-way ANOVA indicated significant seasonal differences (p<0.05) for some genera. The study gave the idea about the most influencing physic-chemical parameters (DO, turbidity, total hardness, Ca2+, and nitrate) on the growth of phytoplankton with the help of different multivariate and univariate analysis (Canonical correspondence analysis, Karl Pearson’s correlation). The study again highlighted that climate parameters (temperature and rainfall) had some effect on the phytoplanktonic groups. Our study conceded that N: P in the studied wetland was less than the Redfield ratio (16:1) in all three seasons,while the Si:P ratio was noticed in the high range (15:1) during pre-monsoon. The value of theShannon diversity index and Margalef’s species richness index were noticed to be > 3, which signified quite rich in phytoplankton diversity and less pollution in the ecosystem. The algal pollution index was predominant during all the seasons, indicating a high organic load which might be due to seasonal jute retting and intensification of agricultural farming.

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Impact of Jute Retting on Phytoplankton Diversity and Aquatic Health: Biomonitoring in a Tropical Oxbow Lake

Cited by 5 publications

References 11 publications

Aquatic health indicators: holistic evaluation tools for sustainable management of a tropical oxbow lake ecosystem

Aquatic health indicators: holistic evaluation tools for sustainable management of a tropical oxbow lake ecosystem

Fish Fauna Faces Anthropogenic Double Trouble: Erosion of Fish Diversity in Tropical Oxbow Lake of the Ganga River Basin in Eastern India

Seasonal influence of physicochemical and climatic parameters on phytoplankton diversity and abundance pattern in community managed semi- impacted floodplain wetland

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