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Phytoplankton biomass in relation to flow dynamics: the case of a tropical river Mahanadi, India

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Relation http://eprints.cmfri.org.in/1422/
https://link.springer.com/article/10.1007%2Fs42965-019-00048-7
https://doi.org/10.1007/s42965-019-00048-7
 
Title Phytoplankton biomass in relation to flow dynamics: the case
of a tropical river Mahanadi, India
 
Creator Sarkar, S S
Sahoo, A K
Gogoi, Pranab
Raman, Rohan Kumar
Manas, H M
Kumari, Kavita
Mohanty, B P
Das, B K
 
Subject Phytoplanktons
 
Description This present study was conducted to extend our understanding on the relationship between Chlorophyll a (Chl a) concentration
and hydrological parameters typically flow velocity, environmental variables and trophic state conditions using
lotic water as experimental system. River Mahanadi, India was selected as a model for the present study. Based on elevation
from mean sea level, twelve sampling sites from Sambalpur to Naraj were grouped into three zones viz. upper zone
(71 km), middle zone (142 km) and lower zone (103 km). Carlson Trophic State Index (CTSI) revealed eutrophic state in
middle and lower zone and with mesotrophic condition in the upper zone. Along the river stretch, a negative correlation was
observed between Chl a concentration and flow velocity at all three zones during post monsoon (r = − 0.15) and monsoon
(r = − 0.31). Seasonal study revealed higher Chl a concentration (16.16–283.85 μg l−1) in post-monsoon with recorded mean
flow velocity (0.28 ± 0.19 ms−1) as compared to monsoon season with lower Chl a (18.68–232.24 μg l−1) and mean flow
velocity (0.54 ± 0.21 ms−1). Among environmental variables, water temperature and pH showed a positive correlation with
Chl a. Overall, the findings of this study illustrated the occurrence of higher phytoplankton biomass (quantified as Chl a)
during post-monsoon season coincides with low water velocity. The dataset of this work can be implicated for the hydrological
and the ecological framework of the tropical river Mahanadi in the Indian Territory.
 
Publisher Springer
 
Date 2019
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/1422/1/Tropical%20Ecology_2019_Manas%20H%20M.pdf
Sarkar, S S and Sahoo, A K and Gogoi, Pranab and Raman, Rohan Kumar and Manas, H M and Kumari, Kavita and Mohanty, B P and Das, B K (2019) Phytoplankton biomass in relation to flow dynamics: the case of a tropical river Mahanadi, India. Tropical Ecology, 60. pp. 485-494.