Study on the influence of hydro-chemical parameters on phytoplankton distribution along Tapi estuarine area of Gulf of Khambhat, India

George, Basil; Kumar, Jeetendra; Kumar, Rita N.

doi:10.1016/j.ejar.2012.12.010

Cited by 71 publications

(34 citation statements)

References 46 publications

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“…This is attributed to the decrease in microbial activity or abundance of phytoplanktons at the mouth of the estuary. Similar results with high density of autotrophic pico planktons were observed at the mouth of tropical 49,50 , subtropical 51 estuaries and coastal environments.…”

supporting

confidence: 74%

Characterization of Humic Substances and their Distribution of XAD Fractions by Absorption Spectroscopy in the Godavari Estuary, India

Chari

Pandi

2017

Current Science

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Humic substances (HS) are formed in estuarine regions by biogeochemical processes of terrestrial and in situ produced organic matters. Their structure and distribution may vary seasonally and spatially. To examine this, HS were isolated from Godavari estuarine waters using ion-exchange resins XAD-8 followed by XAD-4 during 2014-2015. The structural differences between the two fractions were characterized by E 2 /E 3 ratio (a 250 /a 365 ), spectral slope (S 275-295 ), and spectral slope ratio (S R , S 275-295 /S 350-400 ), which were derived from UV-visible absorbance spectra. Lower values of E 2 /E 3 ratio, S 275-295 and S R for XAD-8 fractions than XAD-4, indicate higher aromaticity and higher molecular weight of dissolved organic compounds retained on the former resin. The E 2 /E 3 ratio for XAD-8 and S R for XAD-4 fractions were found to decrease gradually from post-monsoon to monsoon, indicating that the biological process controls the production of organic matter in upstream waters. Lower molecular weight organic compounds formed by bacterial decay and photodegradation during pre-monsoon and higher molecular weight organic compounds formed during the post-monsoon season was attributed to the freshly exudated organic matter from phytoplanktons dominated at the mouth of the estuary.

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supporting

confidence: 74%

Characterization of Humic Substances and their Distribution of XAD Fractions by Absorption Spectroscopy in the Godavari Estuary, India

Chari

Pandi

2017

Current Science

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“…The Estuarine environment is exposed to diverse change in physic-chemical variables due to incessant mixing of fresh water with marine water (George et al, 2012). The water quality estimation is very important to determine ecosystem that have great impact on the occurrence of aquatic lives (Chang, 2008).…”

Section: Discussionmentioning

confidence: 99%

Spatial and Temporal Environmental Variable Affect of the Lower Meghna River and Its Estuary on Macrobenthic Fauna, Bangladesh

Sharif

Islam

Islam³

2017

ijms

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Present study was conducted in the lower Meghna River and its Estuary at Chandpur, Barisal, Bhola, Hatiya and Sandwip during monsoon and post-monsoon season. A total of 17 major taxa were identified of which 10 and 15 were recorded during monsoon and post-monsoon season respectively. Macrobenthos abundance was comparatively greater during post-monsoon than monsoon. The water at lower Meghna was slightly acidic in both seasons. Salinity, soil pH and water temperature were found to be responsible for the variations in benthos assemblage (p<0.05). Canonical Corresponding Analysis (CCA) also indicated that most of the macrobenthos had close dependency to salinity, water temperature, soil pH, organic carbon and organic matter both in monsoon and post-monsoon. Benthos diversity (H') did not show much temporal variation (0.92±0.52 and 0.85±0.40 for the monsoon and post-monsoon seasons respectively). The highest macrobenthos diversity (H') was 1.53 at Bhola and the lowest was 0.29 at Chandpur both during the monsoon season. The macrobenthos evenness (J') also showed less variation between seasons (0.64±0.32 and 0.51±0.26 during monsoon and post-monsoon respectively). The maximum evenness value was found at Sandwip (0.95) during the monsoon season whereas the minimum value was at Barisal (0.20) during the post-monsoon.

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“…Significant spatial heterogeneity of phytoplankton community in the Manjirenji Dam, reflect an integral site specific uniqueness, spatial isolation, and its concomitant influence on consequent dominant biota (Nowlin et Since physicochemical variables explain 50.37% of plankton abundance and ecogeography in the dam, it suggests the limited influence of nutrient stochasticity on plankton community composition (George et al, 2012). Moreso it indicates a gap in this study which excluded vital site specific factors such as light intensity, tidal flushing, grazing pressure (Phlips et al, 2002), drawdown landscape disturbance, sedimentation rates and lake level fluctuations (Wang et al, 2011), which can influence plankton communities in shallow water habitats.…”

Section: Phytoplankton Community Composition and Chlorophyll A Producmentioning

confidence: 99%

Plankton and Macroinvertebrate Community Composition in the Pelagic and Non-Vegetated Littoral Drawdown Zones of a Shallow Reservoir, Manjirenji, Zimbabwe

Utete¹

2017

Appl Ecol Env Res

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Abstract. We examined the influence of physicochemical variables on zooplankton, phytoplankton and macroinvertebrate community composition in a shallow dam, Manjirenji in Zimbabwe. And further explored the relations between selected water parameters on chlorophyll a production as a proxy for phytoplankton biomass in the non-vegetated littoral drawdown zone in comparison to the pelagic zone. We observed high similarity overlaps between some water parameters, and a uniform dominance pattern of zooplankton comprising of rotifers > copepods > cladocera in littoral and pelagic sites, though the dominance order for phytoplankton varied significantly between lake zones. Pollution sensitive macroinvertebrate families dominated in the non-littoral vegetated drawdown zone. Physicochemical variables account for low plankton (50.37%) and macroinvertebrates (59.59%) ecogeography suggesting the influence of latent (unexplored) environmental and biotic factors on plankton and macroinvertebrate community composition in this lake. There was no significant predictor factor among Secchi depth, total nitrogen, and total phosphorus towards chlorophyll a production in the Dam. Non-vegetation in littoral drawdown zones of the shallow turbid lake reduce habitat complexity conferring functional and structural similarity with the pelagic zone. There is a need to comprehend transitional nutrient and water hydrodynamics and their effects on aquatic biodiversity in shallow lakes.

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Study on the influence of hydro-chemical parameters on phytoplankton distribution along Tapi estuarine area of Gulf of Khambhat, India

Cited by 71 publications

References 46 publications

Characterization of Humic Substances and their Distribution of XAD Fractions by Absorption Spectroscopy in the Godavari Estuary, India

Characterization of Humic Substances and their Distribution of XAD Fractions by Absorption Spectroscopy in the Godavari Estuary, India

Spatial and Temporal Environmental Variable Affect of the Lower Meghna River and Its Estuary on Macrobenthic Fauna, Bangladesh

Plankton and Macroinvertebrate Community Composition in the Pelagic and Non-Vegetated Littoral Drawdown Zones of a Shallow Reservoir, Manjirenji, Zimbabwe

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