Bacterial roles in the formation of high-molecular-weight dissolved organic matter in estuarine and coastal waters: Evidence from lipids and the compound-specific isotopic ratios

	Bacterial roles in the formation of high-molecular-weight dissolved organic matter in estuarine and coastal waters: Evidence from lipids and the compound-specific isotopic ratios
	Zou, L ; Wang, XC; Callahan, J ; Culp, RA ; Chen, RF ; Altabet, MA ; Sun, MY
	2004
发表期刊	LIMNOLOGY AND OCEANOGRAPHY
ISSN	0024-3590
卷号	49 期号:1 页码:297-302
文章类型	Article
摘要	High-molecular-weight dissolved organic matter (HMW-DOM, > 1,000 Daltons) is actively involved in the global biogeochemical cycling of many elements, but its carbon sources and detailed formation pathways are still not well understood. In this study, we measured bulk stable carbon and nitrogen isotopic ratios, lipid composition, and compound-specific carbon isotopic ratios of HMW-DOM samples collected from four U.S. estuaries (Boston Harbor/Massachusetts Bay, Delaware/Chesapeake Bay, San Diego Bay, and San Francisco Bay). Analytical results show (1) a fraction of HMW-DOM (lipid associated) in estuarine and coastal waters is derived from bacteria and phytoplankton; (2) this fraction of HMW-DOM is formed by various release processes of bacterial membrane components and bacterial reworking of phytoplankton-derived material; (3) this fraction of HMW-DOM is generally present in all samples from different coastal systems despite variable organic matter inputs and environmental conditions, suggesting an important bacterial role in HMW-DOM formation.; High-molecular-weight dissolved organic matter (HMW-DOM, > 1,000 Daltons) is actively involved in the global biogeochemical cycling of many elements, but its carbon sources and detailed formation pathways are still not well understood. In this study, we measured bulk stable carbon and nitrogen isotopic ratios, lipid composition, and compound-specific carbon isotopic ratios of HMW-DOM samples collected from four U.S. estuaries (Boston Harbor/Massachusetts Bay, Delaware/Chesapeake Bay, San Diego Bay, and San Francisco Bay). Analytical results show (1) a fraction of HMW-DOM (lipid associated) in estuarine and coastal waters is derived from bacteria and phytoplankton; (2) this fraction of HMW-DOM is formed by various release processes of bacterial membrane components and bacterial reworking of phytoplankton-derived material; (3) this fraction of HMW-DOM is generally present in all samples from different coastal systems despite variable organic matter inputs and environmental conditions, suggesting an important bacterial role in HMW-DOM formation.
关键词	Marine Environments Stable Carbon Fatty-acids Nitrogen Ocean Particulate Phytoplankton Degradation Indicators Colloids
学科领域	Limnology ; Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000188381100031
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2766
专题	海洋生态与环境科学重点实验室海洋生物技术研发中心
作者单位	1.Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA 2.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266003, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266003, Peoples R China 4.Univ Massachusetts, Dept Environm Coastal & Ocean Sci, Boston, MA 02125 USA 5.Univ Massachusetts, Dept Environm Coastal & Ocean Sci, Boston, MA 02125 USA 6.Univ Massachusetts, Sch Marine Sci & Technol, New Bedford, MA USA
推荐引用方式 GB/T 7714	Zou, L,Wang, XC,Callahan, J,et al. Bacterial roles in the formation of high-molecular-weight dissolved organic matter in estuarine and coastal waters: Evidence from lipids and the compound-specific isotopic ratios[J]. LIMNOLOGY AND OCEANOGRAPHY,2004,49(1):297-302.
APA	Zou, L.,Wang, XC.,Callahan, J.,Culp, RA.,Chen, RF.,...&Sun, MY.(2004).Bacterial roles in the formation of high-molecular-weight dissolved organic matter in estuarine and coastal waters: Evidence from lipids and the compound-specific isotopic ratios.LIMNOLOGY AND OCEANOGRAPHY,49(1),297-302.
MLA	Zou, L,et al."Bacterial roles in the formation of high-molecular-weight dissolved organic matter in estuarine and coastal waters: Evidence from lipids and the compound-specific isotopic ratios".LIMNOLOGY AND OCEANOGRAPHY 49.1(2004):297-302.

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