气候变化领域集成服务门户(CCPortal): A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity

CCPortal

DOI	10.1007/s10533-020-00736-w
	A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity–ecosystem function relationships
	Ernakovich J.G.; Baldock J.; Creamer C.; Sanderman J.; Kalbitz K.; Farrell M.
发表日期	2021
ISSN	1682563
卷号	153 期号:1
英文摘要	While soil organic carbon (C) is the foundation of productive and healthy ecosystems, the impact of the ecology of microorganisms on C-cycling remains unknown. We manipulated the diversity, applied here as species richness, of the microbial community present in similar soils on two contrasting land-covers—an adjacent pasture and forest—and observed the transformations of plant detritus and soil organic matter (SOM) using stable isotope (13C) tracing coupled with a novel nuclear magnetic resonance (NMR) experiment. The amount of detritus-C degraded was not affected by the microbial diversity (p > 0.05), however the fate of detritus- and SOM-C across the diversity gradient was complex and land cover-dependent. For example, in the pasture soil, higher diversity led to lower CO2 production (p = 0.001), a trend driven solely by SOM-C mineralization. There was no relationship between diversity and detritus-C mineralization or production of new mineral-associations after one year (p > 0.05). In contrast, in the forest soil higher diversity resulted in increased detritus-C (p = 0.01) and SOM-C (p = 0.0008) mineralization and decreased mineral-associated organic matter formation (p = 0.02). In both land cover types, retention efficiency—a measure that integrates both microbial physiology and the ability of the ecosystem to retain C—explained C loss and transformation trends. Overall, this demonstrates that the trajectory of C gained and lost is altered by land management-induced changes to microbial communities, soil structure, and chemical characteristics underlying SOM persistence. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.
英文关键词	Biodiversity–ecosystem function; Carbon cycle; Land management; Mineral-associated organic matter; Nuclear magnetic resonance; Stable isotopes
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184621
作者单位	Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States; CSIRO Agriculture and Food, Glen Osmond, SA, Australia; US Geological Survey, Menlo Park, CA, United States; Woodwell Climate Research Center, Falmouth, MA, United States; Dresden University of Technology, Tharandt, Germany
推荐引用方式 GB/T 7714	Ernakovich J.G.,Baldock J.,Creamer C.,等. A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity–ecosystem function relationships[J],2021,153(1).
APA	Ernakovich J.G.,Baldock J.,Creamer C.,Sanderman J.,Kalbitz K.,&Farrell M..(2021).A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity–ecosystem function relationships.Biogeochemistry,153(1).
MLA	Ernakovich J.G.,et al."A combined microbial and ecosystem metric of carbon retention efficiency explains land cover-dependent soil microbial biodiversity–ecosystem function relationships".Biogeochemistry 153.1(2021).