Record Details

Delineating CO2 and chlorophyll-a variability of an urban estuary with respect to changes in available dissolved nutrients: A microcosm study

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Delineating CO2 and chlorophyll-a variability of an urban estuary with respect to changes in available dissolved nutrients: A microcosm study
 
Creator Bhattacharyya, S
Chanda, A
Hazra, S
Das, S
Das, I
 
Subject Chlorophyll-a
Dissolved nutrients
Hugli Estuary
India
pCO2(water)
 
Description 1710-1720
Changes in dynamics of nutrient with respect to partial pressure of dissolved CO2 [pCO2(water)] from tropical lotic ecosystem, namely diamond harbor an end member of Hugli estuary, were analyzed by way of a microcosm experiment. Though surface waters behaved as an extensive CO2 source under in-situ condition [in-situ pCO2(water) ranged from ~1000 to ~20,000 ppm], it was capable of becoming a sink in post-monsoon while pH as well as primary productivity was significantly high (monitored in microcosm). In pre-monsoon and monsoon, internal generation of nutrients by means of re-mineralization was pre-dominant and the CO2 source character of the water was maintained for eight consecutive days (the duration of the microcosm). Amongst the five nutrients, dissolved nitrate-nitrogen (NO3-N) followed by phosphate-phoshorus (PO4-P) were the most utilized nutrients during higher photosynthetic activities and conditions conducive for optimum photosynthesis can lower the magnitude of CO2 source character. Substantial nutrient utilization efficiency especially during post-monsoon enabled photosynthetic CO2 utilization because of low turbidity and optimum light availability. It infers that controlled freshwater discharge from the Farakka Barrage along with proper replenishment with freshwater borne nutrients could minimize the re-mineralization process and lessen the CO2 source potential of this estuary.
 
Date 2020-11-25T06:09:02Z
2020-11-25T06:09:02Z
2020-11
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscair.res.in/handle/123456789/55700
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.49(11) [November 2020]