气候变化领域集成服务门户(CCPortal): Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River

CCPortal

DOI	10.1007/s10533-019-00634-w
	Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River
	Siddiqui E.; Pandey J.; Pandey U.; Mishra V.; Singh A.V.
发表日期	2020
ISSN	1682563
卷号	147 期号:2
英文摘要	There has been considerable debate on how atmospheric deposition (AD) in the watershed alters the supply of dissolved organic carbon (DOC) to river and coastal ecosystems. Here we show how AD-N and –P in the Ganga River Basin (GRB) drives the delivery of DOC. We conducted three sets of studies, a 3 year (2016–2018) in situ trial, a 5 year (2014–2018) soil-spray experiment and a decadal-scale (2009–2018) in situ coupled pot-culture study to show how AD-N and –P stimulates soil microbial activity and consequently enhances the DOC export to the Ganga River. The AD-input increased overtime, and on an average, the basin receives ~ 1.55 Tg Nr and ~ 0.088 Tg P annually. Our results show that AD–N and –P increases soil microbial biomass (Cmic), substrate-induced respiration (SIR), FDAase and β-D-glucosidase activity to enhance water-soluble organic carbon (WSOC) in the watershed. We found significant correlations (r = 0.83–0.93; p < 0.001) of Cmic, SIR, enzyme activities, WSOC and DOC with AD–N and –P in the watershed. Although the land use was found to be the dominant contributor of variations, the AD-input did appear an important driver enhancing the delivery of DOC. The runoff flux of DOC was found to the highest for built-up land (that include urban wash) followed by wasteland, grassland, agricultural land, scrubland, mixed forest and deciduous forest. The study has relevance understanding the mechanism of AD-driven DOC delivery and designing an action plan for integrated river basin management (IRBM). © 2020, Springer Nature Switzerland AG.
英文关键词	DOC; Extracellular enzymes; Ganga river; Microbial biomass; N Deposition; P Deposition
学科领域	atmospheric deposition; basin management; biogeochemistry; carbon flux; dissolved organic carbon; enzyme activity; integrated approach; microbial activity; nutrient cycling; respiration; watershed; Ganges River
语种	英语
scopus关键词	atmospheric deposition; basin management; biogeochemistry; carbon flux; dissolved organic carbon; enzyme activity; integrated approach; microbial activity; nutrient cycling; respiration; watershed; Ganges River
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120393
作者单位	Ganga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India; Department of Botany, Faculty of Science and Technology, Mahatma Gandhi Kashividyapith, Varanasi, 221002, India; Department of Chemistry, Maulana Azad Institute of Humanity, Science and Technology, Sitapur, 261203, India
推荐引用方式 GB/T 7714	Siddiqui E.,Pandey J.,Pandey U.,et al. Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River[J],2020,147(2).
APA	Siddiqui E.,Pandey J.,Pandey U.,Mishra V.,&Singh A.V..(2020).Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River.Biogeochemistry,147(2).
MLA	Siddiqui E.,et al."Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River".Biogeochemistry 147.2(2020).