The source and distribution of dissolved and particulate organic matter in the Bay of St Louis, northern Gulf of Mexico

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	The source and distribution of dissolved and particulate organic matter in the Bay of St Louis, northern Gulf of Mexico
	Cai, Yihua ; Guo, Laodong ; Wang, Xuri ; Mojzis, Allison K. ; Redalje, Donald G. ; Cai YH(蔡毅华)
刊名	http://dx.doi.org/10.1016/j.ecss.2011.10.017
	2012-01-01
关键词	MISSISSIPPI RIVER PLUME CHESAPEAKE BAY ARCTIC-OCEAN CARBON TRANSPORT NITROGEN ESTUARINE TEXAS DOC PHOSPHORUS
英文摘要	Northern Gulf Institute/NOAA [09-NGI-13, 09-NGI-04]; National Science Foundation (OCE) [0850957]; National Natural Science Foundation of China [40906040]; Fundamental Research Funds for the Central Universities of China [2010121027]; Dissolved (DOM) and particulate organic matter (POM) samples were collected from the Bay of St. Louis (BSL) in the northern Gulf of Mexico during March September, 2007 for chemical and isotopic characterization to examine the distribution and sources of organic matter species in the estuarine environment. Similar to the variations in hydrographic parameters and nutrients, concentrations of organic C, N, and P and stable isotopic composition show large spatial and seasonal variations during the sampling period. Concentrations of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) decreased with increasing salinity while delta C-13-DOC increased with salinity from -30.23 parts per thousand to -19.04 parts per thousand, suggesting a shift of DOC sources from terrestrial- to marine-dominated inputs during estuarine mixing. In contrast to both DOC and DON, the concentration of dissolved organic phosphorus (DOP) increased with increasing salinity, indicating additional DOP sources at higher salinity stations. Concentrations of particulate organic carbon (POC) and nitrogen (PN) decreased with increasing salinity, showing a negative correlation with the concentration of suspended particulate mater. Both POC/PN ratio (8.6-19.6) and delta C-13-POC (-28.51 parts per thousand to -23.79 parts per thousand) increased in general with increasing salinity, indicating the predominance of terrestrially derived organic matter in the upper bay and increasing diagenetically altered marine POM component in the lower bay. Fresh microalgae might account for about one third of POM in the BSL as estimated from POC/Chl a ratio. Overall, the terrestrial inputs, in situ primary production and diagenetically altered marine POM mostly from sediment resuspension are the major sources of POM in the BSL. (C) 2011 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ESTUAR COAST SHELF S
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87744]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Cai, Yihua,Guo, Laodong,Wang, Xuri,et al. The source and distribution of dissolved and particulate organic matter in the Bay of St Louis, northern Gulf of Mexico[J]. http://dx.doi.org/10.1016/j.ecss.2011.10.017,2012.
APA	Cai, Yihua,Guo, Laodong,Wang, Xuri,Mojzis, Allison K.,Redalje, Donald G.,&蔡毅华.(2012).The source and distribution of dissolved and particulate organic matter in the Bay of St Louis, northern Gulf of Mexico.http://dx.doi.org/10.1016/j.ecss.2011.10.017.
MLA	Cai, Yihua,et al."The source and distribution of dissolved and particulate organic matter in the Bay of St Louis, northern Gulf of Mexico".http://dx.doi.org/10.1016/j.ecss.2011.10.017 (2012).