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Effect of climato-environmental parameters on chlorophyll a concentration in the lower Ganga basin, India

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Title Effect of climato-environmental parameters on chlorophyll a concentration in the lower Ganga basin, India
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Creator Soma Das Sarkar
Uttam Kumar Sarkar
Malay Nadkar
Koushik Roy
Arun Kumar Bose
Subir Kumar Nag
Gunjan Karnatak
Basanta Kumar Das
 
Subject Chlorophyll a
Climate change
Environmental variable
Predictive modeling
River Ganga
 
Description Not Available
Introduction: Chlorophyll a concentration proxies the phytoplankton biomass which directly involves in signifying the production functions of aquatic ecosystem. Thus, it is imperative to understand their
spatio-temporal kinetics in lotic environment with reference to regional climatic variabilities in the tropical
inland waters. Objective: In-situ studies were conducted to examine the changes in phytoplankton biomass in
lower Ganga basin as influenced by various environmental parameters under regional climatic variability during
2014-2016. Methods: Firstly, the most key influential environmental parameters on riverine Chl-a concentration
were determined. Then the direct cascading effect of changing climatic variables on key environmental parameters were derived through modeling and quantified probable changes in mean Chl-a concentration in the lower stretch of river. Results: Only five environmental parameters namely water temperature, total dissolved solid, salinity, total alkalinity and pH were key factors influencing Chl-a (Multiple R2: 0.638, P < 0.05). Present estimates indicate that if the present rate of regional climatic variability over the last 3 decades (mean air temperature + 0.24 °C, total annual rainfall -196.3 mm) remain consistent over the next three decades (2015-2045), an increase in mean Chl-a by + 170 µgL-1 may likely be expected grossly reaching about 475.94 µg L-1 by the year 2045 or more. Conclusions: The present study is first such comprehending a gross hint towards the probable ecosystem response with an alternative model based methodology in data-deficient situations. Subsequently, the output would also be of great benefit for increase water governance and developing strategy protocol for sustainable water management for greater ecosystem services
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Date 2021-07-24T09:25:29Z
2021-07-24T09:25:29Z
2020-10-19
 
Type Article
 
Identifier Das Sarkar, D., Sarkar, U.K., Naskar, M., Roy, K., Bose, A.K., Nag, S.K., … Das, B.K. (2021). Effect of climato-environmental parameters on chlorophyll a concentration in the lower Ganga basin, India. Revista de Biología Tropical, 69(1), 60-76.
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http://krishi.icar.gov.in/jspui/handle/123456789/49856
 
Language English
 
Relation Not Available;
 
Publisher University of Costa Rica