DOI: 10.1007/s10533-013-9870-0
Scopus记录号: 2-s2.0-84891901851
论文题名: No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog
作者: Weedon J.T. ; Aerts R. ; Kowalchuk G.A. ; van Bodegom P.M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 1 起始页码: 55
结束页码: 66
语种: 英语
英文关键词: Climate change
; Northern peatlands
; Seasonality
; Soil enzymes
; Stoichiometry
; Sub-arctic
Scopus关键词: climate change
; decomposition
; ecosystem response
; enzyme activity
; experimental study
; global change
; hydrolysis
; peatland
; seasonality
; snow
; soil microorganism
; soil nutrient
; soil organic matter
; stoichiometry
; subarctic region
英文摘要: The nature of linkages between soil C and N cycling is important in the context of terrestrial ecosystem responses to global environmental change. Extracellular enzymes produced by soil microorganisms drive organic matter decomposition, and are considered sensitive indicators of soil responses to environmental variation. We investigated the response of eight hydrolytic soil enzymes (four peptidases and four glycosidases) to experimental warming in a long-term climate manipulation experiment in a sub-arctic peat bog, to determine to what extent the response of these two functional groups are similar. We found no significant effect of experimental spring and summer warming and/or winter snow addition on either the potential activity or the temperature sensitivity (of Vmax) of any of the enzymes. However, strong and contrasting seasonal patterns in both variables were observed. All of the peptidases, as well as alpha-glucosidase, had lower potential activity at the end of summer (August) compared to the beginning (June). Conversely, beta-glucosidase had significantly higher potential activity in August. Peptidases had consistently higher temperature sensitivities in June compared to August, while all four glycosidases showed the opposite pattern. Our results suggest that warming effects on soil enzymes are small compared to seasonal differences, which are most likely mediated by the seasonality of substrate supply and microbial nutrient demand. Furthermore the contrasting seasonal patterns for glycosidases and peptidases suggest that enzyme-based models of soil processes need to allow for potential divergence between the production and activity of these two enzyme functional groups. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83689
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 Ecological Science, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands; Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, Netherlands; Department of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp, 2610 Wilrijk, Belgium
Recommended Citation:
Weedon J.T.,Aerts R.,Kowalchuk G.A.,et al. No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog[J]. Biogeochemistry,2014-01-01,117(1)