Ecosystem health status and trophic modeling of an anthropogenically impacted small tropical estuary along India’s west coast

Author(s):  
Dhanya Mohan Lal ◽  
Giri Bhavan Sreekanth ◽  
Avadootha Shivakrishna ◽  
Ratheesh Kumar ◽  
Binaya Bhusan Nayak ◽  
...  
2009 ◽  
Vol 252 ◽  
pp. 305-314 ◽  
Author(s):  
V. S. Hegde ◽  
G. Shalini ◽  
S. R. Nayak ◽  
A. S. Rajawat ◽  
A. Surynarayana ◽  
...  

2016 ◽  
Vol 7 ◽  
pp. 150-158 ◽  
Author(s):  
B. Manikandan ◽  
J. Ravindran ◽  
H. Mohan ◽  
R. Periasamy ◽  
R. Mani Murali ◽  
...  

2021 ◽  
Author(s):  
Qianhui Yuan ◽  
Huihui Wu ◽  
Yunqiang Zhao ◽  
Yuhang Zhang ◽  
Ruihua Yao ◽  
...  

Abstract Ecosystem services provided by river ecosystems rely on healthy ecosystem structure and ecological processes. The Beijing-Tianjin-Hebei urban is a typical water-deficient area. As an important part of the urban-rural integration construction, evaluating the health status of the Beiyun River Basin and discovering the weak links in the water environment is the basis for improving the health of the basin. In this study, Analytic Hierarchy Process was used to establish an evaluation index system for the Beiyun River Basin from 5 aspects including water quality, biology, habitat, hydrology, and social functions, and to assign weights to the index layer. The evaluation results showed that the health evaluation results of the Beiyun River Basin in 2019 are “sub-healthy”, and the overall health status is gradually worsening from northwest to southeast. In the middle reaches of the region, the evaluation result is "healthy", followed by the upstream, and the downstream is the worst. The results showed that areas with less human interference are in better health. The factors that affect the overall health evaluation status in the basin are the level of nutrition, biodiversity, and vegetation coverage. For the comprehensive management of the Beiyun River, the improvement of water quality and habitat ecological restoration is the key to the health of the upstream ecosystem health status. The improvement of the health status of the downstream should focus on equal emphasis on water quality and quantity, restoration of biodiversity, and improvement of the quality of the riparian ecological environment.


2019 ◽  
Vol 103 (16) ◽  
pp. 6407-6421 ◽  
Author(s):  
Carmen Astudillo-García ◽  
Syrie M. Hermans ◽  
Bryan Stevenson ◽  
Hannah L. Buckley ◽  
Gavin Lear

Author(s):  
Udaykumar V. Gaonkar ◽  
Sanitha K. Sivadas ◽  
Baban S. Ingole

Macrofaunal community structure is determined by a number of environmental variables. The riverine run-off during the monsoon brings about drastic changes in the physico-chemical parameters of a tropical estuary. The aim of the present study was to investigate the influence of rainfall in structuring the benthic macrofaunal community of a tropical estuary. The temporal dynamics of the macrobenthic community in the monsoon dominated Mandovi estuary (central west coast of India) was studied fortnightly from June 2007 to June 2009. A fixed location, downstream of the Madovi river, was sampled for benthic and water parameters. Ten replicates were collected during each sampling date using a Van Veen grab (0.04 m2). The macrofaunal abundance showed temporal fluctuation. The multivariate analysis showed the clustering of the samples linked to the environmental parameters (CCA and LINKTREE). The temporal variation observed in the macrofaunal abundance was basically due to changes in abundance of the dominant species. The variation in macrofaunal abundance was brought about by the recruitment and settling of re-suspended adults. It can be concluded that the macrofaunal structuring is influenced by temporal changes in the environment associated with the annual monsoon rainfall. Hence climate induced changes in the monsoonal pattern may affect the macrobenthic assemblages of tropical estuaries.


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