Particulate organic matter dynamics in coastal systems of the northern Beibu Gulf

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Particulate organic matter dynamics in coastal systems of the northern Beibu Gulf
	Kaiser, David ; Unger, Daniela ; Qiu, Guanglong
刊名	CONTINENTAL SHELF RESEARCH
	2014
卷号	82 期号:1 页码:99-118
关键词	Riverine particle fluxes delta C-13 and delta N-15 Amino acids Land-use Human impact Guangxi coast
ISSN号	0278-4343
中文摘要	Estuarine particle fluxes are an integral part of land-ocean-connectivity and influence coastal environmental conditions. In areas with strong anthropogenic impact they may contribute to coastal eutrophication. To investigate the particulate biogeochemistry of a human affected estuary, we sampled suspended, sedimentary and plant particulate matter along the land-ocean continuum from Nanliu River to Lianzhou Bay in southern China. Riverine particle fluxes exceed inputs from land based pond aquaculture. Elemental (C/N) and isotopic composition of particulate organic carbon (delta C-13) and total nitrogen (delta N-15) showed that suspended and sedimentary organic matter (OM) mainly derive from freshwater and marine phytoplankton, with minor contributions from terrestrial and aquaculture derived particles. Amino acid composition indicates subseasonal variability of production and freshness of phytoplankton OM. Strongest compositional changes of suspended particles are associated with storm-related extreme precipitation events, which introduce soil derived OM. High concentrations of chlorophyll a reflect eutrophic conditions in riverine and coastal waters. Human impact results in high delta N-15 signals in suspended, sedimentary and plant particulate matter. Using these in a comparison with two little affected sites shows that anthropogenic influence disperses from the Nanliu River to remote estuaries and mangrove areas. Our results suggest that autochthonous production binds anthropogenic nutrients in particles that are transported along the coast. (C) 2014 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000337858200009
公开日期	2015-03-23
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9200]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Kaiser, David,Unger, Daniela,Qiu, Guanglong. Particulate organic matter dynamics in coastal systems of the northern Beibu Gulf[J]. CONTINENTAL SHELF RESEARCH,2014,82(1):99-118.
APA	Kaiser, David,Unger, Daniela,&Qiu, Guanglong.(2014).Particulate organic matter dynamics in coastal systems of the northern Beibu Gulf.CONTINENTAL SHELF RESEARCH,82(1),99-118.
MLA	Kaiser, David,et al."Particulate organic matter dynamics in coastal systems of the northern Beibu Gulf".CONTINENTAL SHELF RESEARCH 82.1(2014):99-118.