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dc.contributor.authorPradhan, U.K.
dc.contributor.authorWu, Y.
dc.contributor.authorShirodkar, P.V.
dc.contributor.authorKumar, H.S.
dc.contributor.authorZhang, J.
dc.date.accessioned2020-12-31
dc.date.accessioned2021-02-09T10:13:17Z
dc.date.available2020-07-06
dc.date.available2021-02-09T10:13:17Z
dc.date.issued2020
dc.identifier.citationJournal of Environmental Management, vol.271; 2020; Article no: 110993
dc.identifier.issn1095-8630
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S030147972030921X
dc.identifier.urihttps://doi.org/10.1016/j.jenvman.2020.110993
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8476
dc.descriptionIF2019 - 5.647
dc.description.abstractOrganic matter (OM) composition changed due to land use - land cover (LULC) and hydrology modification, has distinctive linkage towards sustainable environment management in tropical river systems. It is crucial in small river systems, which experience delay of freshwater flow to the estuaries due to headwater damming, also LULC alteration along the entire basin. In order to understand this fundamental linkage in tropical Zuari river-estuary (ZRE), we analyzed multi-proxy data of organic carbon to total nitrogen ratio (Corg/N), stable organic carbon isotope (delta13Corg) and lignin phenols measured in seasonally collected suspended particulate matter (SPM) and sediment samples. Results highlighted about moderate seasonality of OM tracers, with a significant effect of LULC alteration, which nevertheless a striking feature in monsoon-fed river-estuaries of peninsular India. Particulate Corg export from ZRE estimated to be 20 x 103 kg yr-1, was much lower as compared to tropical river-estuary systems elsewhere. OM fraction from vascular plant (mangroves) contributed to SPM and sediment was 15% and 40%, respectively, calculated using a Bayesian mixing calculation through Stable isotope analysis in R (SIAR). Presence of mudflat LULC in the estuarine region notably caused 20% decrease in Corg and 60% increase in lignin phenol ( lambda 8) as compared to their limits in upstream. This is although mudflat accounts only 3% of ZRE catchment. The degree of shifts in OM tracers highlights towards efficient entrapment, transformation and/or utilization of riverine OM in the mudflats of ZRE. Accelerated human induced LULC dampens the seasonality of OM characteristics and flow is highlighted through this study, which is essential towards sustainable environmental management practice in small rivers of India and World.
dc.languageen
dc.publisherAcademic Press
dc.relation.ispartofJ Environ Manage
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleConnecting land use-land cover and precipitation with organic matter biogeochemistry in a tropical river-estuary system of western peninsular India
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Mumbai, Maharastra, India


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