globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-013-9874-9
Scopus记录号: 2-s2.0-84891901493
论文题名:
Differences in the substrate spectrum of extracellular enzymes in shallow lakes of differing trophic status
作者: Ziervogel K.; Leech D.; Arnosti C.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期:1
起始页码: 143
结束页码: 151
语种: 英语
英文关键词: Carbon cycling ; Enzymatic activities ; Polysaccharide hydrolysis ; Shallow lakes
Scopus关键词: carbon cycle ; enzyme activity ; food web ; hydrolysis ; lake ecosystem ; lake water ; microbial community ; polysaccharide ; primary production ; seasonality ; shallow water ; substrate ; trophic environment ; trophic status ; North Carolina ; United States
英文摘要: Organic matter fluxes and food web interactions in lakes depend on the abilities of heterotrophic microbial communities to access and degrade organic matter, a process that begins with extracellular hydrolysis of high molecular weight substrates. In order to determine whether patterns of enzymatic hydrolysis vary among shallow lakes of different trophic status, we investigated the hydrolysis of six specific organic macromolecules (polysaccharides) in the spring and late summer in four adjacent shallow lakes of eutrophic, oligotrophic, and dystrophic status in coastal North Carolina, USA. The spectrum of enzyme activities detected differed strongly between lakes, with all six polysaccharides hydrolyzed in West Mattamuskeet in May, while only two substrates were hydrolyzed in Lake Phelps in August/September. Differences in the spectrum of enzyme activities, and therefore the capabilities of heterotrophic microbial communities, were likely driven by variations among lakes in primary productivity patterns, sediment-water interactions, and/or water chemistry. Our data represent a first step towards a better understanding of carbon substrate availability and differences in carbon cycling pathways in shallow lakes of different trophic status. © 2013 Springer Science+Business Media Dordrecht.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83575
Appears in Collections:气候减缓与适应
气候变化事实与影响

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作者单位: Department of Marine Sciences, University of North Carolina at Chapel Hill, Venable and Murray Halls, Chapel Hill, NC, 27599-3300, United States; Department of Biological and Environmental Sciences, Longwood University, Farmville, VA, United States

Recommended Citation:
Ziervogel K.,Leech D.,Arnosti C.. Differences in the substrate spectrum of extracellular enzymes in shallow lakes of differing trophic status[J]. Biogeochemistry,2014-01-01,117(1)
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