globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12075
论文题名:
Above- and belowground linkages in Sphagnum peatland: Climate warming affects plant-microbial interactions
作者: Jassey V.E.; Chiapusio G.; Binet P.; Buttler A.; Laggoun-Défarge F.; Delarue F.; Bernard N.; Mitchell E.A.; Toussaint M.-L.; Francez A.-J.; Gilbert D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期:3
起始页码: 811
结束页码: 823
语种: 英语
英文关键词: Food chains ; Microbial food web ; Plant and microbial communities ; Polyphenols ; Testate amoebae ; Water chemistry
Scopus关键词: aboveground biomass ; belowground biomass ; carbon cycle ; climate effect ; community structure ; food chain ; food web ; microbial community ; moss ; nutrient cycling ; peatland ; water chemistry ; article ; greenhouse effect ; host pathogen interaction ; microbiology ; Sphagnopsida ; Global Warming ; Host-Pathogen Interactions ; Sphagnopsida ; Bryophyta ; Sphagnum ; Tracheophyta
英文摘要: Peatlands contain approximately one third of all soil organic carbon (SOC). Warming can alter above- and belowground linkages that regulate soil organic carbon dynamics and C-balance in peatlands. Here we examine the multiyear impact of in situ experimental warming on the microbial food web, vegetation, and their feedbacks with soil chemistry. We provide evidence of both positive and negative impacts of warming on specific microbial functional groups, leading to destabilization of the microbial food web. We observed a strong reduction (70%) in the biomass of top-predators (testate amoebae) in warmed plots. Such a loss caused a shortening of microbial food chains, which in turn stimulated microbial activity, leading to slight increases in levels of nutrients and labile C in water. We further show that warming altered the regulatory role of Sphagnum-polyphenols on microbial community structure with a potential inhibition of top predators. In addition, warming caused a decrease in Sphagnum cover and an increase in vascular plant cover. Using structural equation modelling, we show that changes in the microbial food web affected the relationships between plants, soil water chemistry, and microbial communities. These results suggest that warming will destabilize C and nutrient recycling of peatlands via changes in above- and belowground linkages, and therefore, the microbial food web associated with mosses will feedback positively to global warming by destabilizing the carbon cycle. This study confirms that microbial food webs thus constitute a key element in the functioning of peatland ecosystems. Their study can help understand how mosses, as ecosystem engineers, tightly regulate biogeochemical cycling and climate feedback in peatlands. © 2012 Blackwell Publishing Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62513
Appears in Collections:影响、适应和脆弱性

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作者单位: Laboratoire Chrono-Environnement, UMR CNRS/UFC 6249 Université, de Franche-Comté, F-25211 Montbéliard cedex, France; Ecological Systems Laboratory (ECOS), Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne EPFL, School of Architecture, Station 2, Lausanne, 1015, Switzerland; Snow and Landscape Research (WSL), Swiss Federal Institute for Forest, Site Lausanne, Station 2, Lausanne, 1015, Switzerland; ISTO, UMR 7327, Université d'Orléans, Orléans, 45071, France; ISTO, UMR 7327, CNRS/INSU, Orléans, 45071, France; ISTO, UMR 7327, BRGM, BP 36009, Orléans, 45060, France; Laboratory of Soil Biology, University of Neuchâtel, Rue Emile-Argand 11, Neuchâtel, CH-2000, Switzerland; CNRS UMR 6553 ECOBIO 'Ecosystèmes, Biodiversité, Evolution' and FR 90 CAREN, Campus de Beaulieu, Université de Rennes 1, Rennes cedex, F-35042, France

Recommended Citation:
Jassey V.E.,Chiapusio G.,Binet P.,et al. Above- and belowground linkages in Sphagnum peatland: Climate warming affects plant-microbial interactions[J]. Global Change Biology,2013-01-01,19(3)
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