气候变化领域集成服务门户(CCPortal): Sources of organic matter and tracing of nutrient pollution in the coastal Bay of Bengal

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DOI	10.1016/j.marpolbul.2020.111477
	Sources of organic matter and tracing of nutrient pollution in the coastal Bay of Bengal
	Sarma V.V.S.S.; Krishna M.S.; Srinivas T.N.R.
发表日期	2020
ISSN	0025326X
卷号	159
英文摘要	Stable isotopic composition of carbon (δ13CPOM) and nitrogen (δ15NPOM) in the particulate organic matter (POM) is used to identify sources of organic carbon and nutrients using monthly time-series observation in the coastal Bay of Bengal (BoB). The hydrographic structure indicates that the coastal BoB is influenced by coastal upwelling during March–May, advection of peninsular river discharge during June to September and glacial (Ganges) river discharge during October to December due to reversing of East India Coastal Currents (EICC). C/N ratios in POM were mostly higher values than Redfield ratio in the study region indicating possible contribution of terrestrial origin. Enriched δ13CPOM were found during March–May associated with coastal upwelling indicating major contribution of POM from the in situ production while lower values were noticed during June to September followed by October to December indicating influence of terrestrial sources. δ15NPOM displayed strong inverse relation with salinity and linear relation with Chl-a suggesting that anthropogenic nutrients from the land increased coastal phytoplankton biomass. δ15NPOM linearly decreased with increase in distance from the coast and reached to the typical offshore value of 6–6.5‰ indicating that terrestrial nutrients influence was spread up to a distance of 15 to 20 km from the coast in the study region. Our study suggested that coastal waters are influenced by terrestrial/anthropogenic nutrients and its impact can be noticed up to 15 to 20 km from the coast and its impact on Biodiversity Beyond National Jurisdiction may be negligible than hitherto hypothesized. © 2020 Elsevier Ltd
英文关键词	Bay of Bengal; Coastal currents; Nutrients; Organic matter; Pollution; River discharge
语种	英语
scopus关键词	Biodiversity; Biogeochemistry; Coastal engineering; Discharge (fluid mechanics); Offshore oil well production; Organic carbon; River pollution; Coastal upwelling; Hydrographic structures; In-situ production; Inverse relations; Nutrient pollution; Particulate organic matters; Phytoplankton biomass; Stable isotopic compositions; Nutrients; carbon 13; delta carbon 13; delta nitrogen 15; nitrogen 15; particulate organic matter; unclassified drug; nitrogen; carbon isotope; nitrogen isotope; nutrient; oceanic current; organic carbon; particulate organic matter; pollutant source; river discharge; stable isotope; time series analysis; Article; Bay of Bengal; biomass; calibration; coastal waters; colorimetry; concentration (parameter); controlled study; hydrography; India; measurement precision; physical parameters; Redfield ratio; river; salinity; water pollution; bay; environmental monitoring; Bay of Bengal; Indian Ocean; Bays; Environmental Monitoring; Nitrogen Isotopes; Nutrients; Rivers
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148655
作者单位	CSIR-National Institute of Oceanography, Regional Centre, 176 Lawsons Bay Colony, Visakhapatnam, 530017, India; Academy of Scientific and Innovative Research (AcSIR), Dona Paula, Goa, India
推荐引用方式 GB/T 7714	Sarma V.V.S.S.,Krishna M.S.,Srinivas T.N.R.. Sources of organic matter and tracing of nutrient pollution in the coastal Bay of Bengal[J],2020,159.
APA	Sarma V.V.S.S.,Krishna M.S.,&Srinivas T.N.R..(2020).Sources of organic matter and tracing of nutrient pollution in the coastal Bay of Bengal.Marine Pollution Bulletin,159.
MLA	Sarma V.V.S.S.,et al."Sources of organic matter and tracing of nutrient pollution in the coastal Bay of Bengal".Marine Pollution Bulletin 159(2020).