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Characterizing nutrient dynamics with relation to changes in partial pressure of CO 2 in a tropical sewage‐fed aquaculture pond situated in a Ramsar wetland
Author(s) -
Bhattacharyya Sourav,
Hazra Sugata,
Das Sourav,
Samanta Sourav,
Mukhopadhyay Anirban,
Dutta Dibyendu,
Choudhury S. B.,
Chanda Abhra
Publication year - 2020
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12459
Subject(s) - environmental science , ipomoea aquatica , nutrient , microcosm , nitrate , autotroph , ramsar site , hydrology (agriculture) , wetland , environmental chemistry , wastewater , ecology , environmental engineering , chemistry , biology , spinach , genetics , geotechnical engineering , bacteria , engineering
The changes in nutrient dynamics (nitrate, ammonium, silicate, phosphate and iron concentration) vis‐à‐vis partial pressure of CO 2 in water [pCO 2 (water)] from tropical sewage‐fed aquaculture ponds (East Kolkota Wetlands, India) were analysed by means of a microcosm. A significant relationship between these nutrient’s removal from the system and reduction in pCO 2 (water) was observed (with few exceptions). These water bodies acted as significant sources of CO 2 in pre‐monsoon and monsoon seasons despite having substantial quantity of chlorophyll‐ a to make it a net autotrophic system. The study revealed that if conditions favourable for optimum photosynthesis can be maintained in these ponds, the CO 2 source character of these ponds can be reversed. In the post‐monsoon season, when the pH of the water column was high, the system acted as sink for CO 2 which suggests the use of lime to prevent these systems from becoming hypereutrophic and carbon source at the same time.