全球智库信息集成服务系统(G2TT): Social dynamics within decomposer communities lead to nitrogen retention and organic matter build-up in soils.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1038/ncomms9960
	Social dynamics within decomposer communities lead to nitrogen retention and organic matter build-up in soils.
	Kaiser C; Franklin O; Richter A; Dieckmann U
发表日期	2015
出处	Nature Communications 6: no.8960
出版年	2015
语种	英语
摘要	The chemical structure of organic matter has been shown to be only marginally important for its decomposability by microorganisms. The question of why organic matter does accumulate in the face of powerful microbial degraders is thus key for understanding terrestrial carbon and nitrogen cycling. Here we demonstrate, based on an individual-based microbial community model, that social dynamics among microbes producing extracellular enzymes ('decomposers') and microbes exploiting the catalytic activities of others ('cheaters) regulate organic matter turnover. We show that the presence of cheaters increases nitrogen retention and organic matter build-up by downregulating the ratio of extracellular enzymes to total microbial biomass, allowing nitrogen-rich microbial necromass to accumulate. Moreover, increasing catalytic efficiencies of enzymes are outbalanced by a strong negative feedback on enzyme producers, leading to less enzymes being produced at the community level. Our results thus reveal a possible control mechanism that may buffer soil CO2 emissions in a future climate.
主题	Evolution and Ecology (EEP) ; Ecosystems Services and Management (ESM)
关键词	Earth sciences Biogeochemistry Ecology Microbiology
URL	http://pure.iiasa.ac.at/id/eprint/11320/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/130223
推荐引用方式 GB/T 7714	Kaiser C,Franklin O,Richter A,et al. Social dynamics within decomposer communities lead to nitrogen retention and organic matter build-up in soils.. 2015.