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DOI10.1007/s10533-014-9991-0
Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types
Hill, Brian H.1; Elonen, Colleen M.1; Jicha, Terri M.1; Kolka, Randall K.2; Lehto, Larae L. P.1; Sebestyen, Stephen D.2; Seifert-Monson, Lindsey R.3
发表日期2014-08-01
ISSN0168-2563
卷号120期号:1-3页码:203-224
英文摘要

We compared carbon (C), nitrogen (N), and phosphorus (P) concentrations in atmospheric deposition, runoff, and soils with microbial respiration [dehydrogenase (DHA)] and ecoenzyme activity (EEA) in an ombrotrophic bog and a minerotrophic fen to investigate the environmental drivers of biogeochemical cycling in peatlands at the Marcell Experimental Forest in northern Minnesota, USA. Ecoenzymatic stoichiometry was used to construct models for C use efficiency (CUE) and decomposition (M), and these were used to model respiration (R-m). Our goals were to determine the relative C, N, and P limitations on microbial processes and organic matter decomposition, and to identify environmental constraints on ecoenzymatic processes. Mean annual water, C, and P yields were greater in the fen, while N yields were similar in both the bog and fen. Soil chemistry differed between the bog and fen, and both watersheds exhibited significant differences among soil horizons. DHA and EEA differed by watersheds and soil horizons, CUE, M, and R-m differed only by soil horizons. C, N, or P limitations indicated by EEA stoichiometry were confirmed with orthogonal regressions of ecoenzyme pairs and enzyme vector analyses, and indicated greater N and P limitation in the bog than in the fen, with an overall tendency toward P-limitation in both the bog and fen. Ecoenzymatic stoichiometry, microbial respiration, and organic matter decomposition were responsive to resource availability and the environmental drivers of microbial metabolism, including those related to global climate changes.


英文关键词Decomposition;Ecoenzymes;Peat;Soil;Stoichiometry
语种英语
WOS记录号WOS:000339871700013
来源期刊BIOGEOCHEMISTRY
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/60439
作者单位1.US EPA, Midcontinent Ecol Div, Natl Hlth & Environm Effects Res Lab, Off Res & Dev, Duluth, MN 55804 USA;
2.US Forest Serv, Ctr Res Ecosyst Change, No Res Stn, Grand Rapids, MN 55744 USA;
3.Univ Minnesota, Integrated Biosci Grad Program, Duluth, MN 55812 USA
推荐引用方式
GB/T 7714
Hill, Brian H.,Elonen, Colleen M.,Jicha, Terri M.,et al. Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types[J]. 美国环保署,2014,120(1-3):203-224.
APA Hill, Brian H..,Elonen, Colleen M..,Jicha, Terri M..,Kolka, Randall K..,Lehto, Larae L. P..,...&Seifert-Monson, Lindsey R..(2014).Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types.BIOGEOCHEMISTRY,120(1-3),203-224.
MLA Hill, Brian H.,et al."Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types".BIOGEOCHEMISTRY 120.1-3(2014):203-224.
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