气候变化领域集成服务门户(CCPortal): Controls on soil microbial carbon use efficiency over long-term ecosystem development

CCPortal

DOI	10.1007/s10533-021-00758-y
	Controls on soil microbial carbon use efficiency over long-term ecosystem development
	Oliver E.E.; Houlton B.Z.; Lipson D.A.
发表日期	2021
ISSN	1682563
起始页码	309
结束页码	325
卷号	152 期号:2021-02-03
英文摘要	Carbon use efficiency—the proportion of substrate carbon that is converted to microbial biomass—is an important control on many ecosystem properties including carbon sequestration and nutrient cycling. Although CUE varies widely across terrestrial ecosystems, a coherent understanding of edaphic controls on CUE is lacking, thereby limiting the accuracy of global carbon models. The objective of this study was to determine how microbial CUE changes with long-term soil development and nutrient availability. Soil was collected across the chronosequence and fertility gradient at Jug Handle State Natural Reserve (the “Ecological Staircase”) in Mendocino County, CA. These soils exhibit a range in pH (3.29–6.59), litter quantity and quality (litter C:N, 32–70), and clay content (14.13–87.30%), while other factors such as modern-day climate, potential biota, and parent material are common to all sites. CUE varied significantly with soil and ecosystem development; the relationship was unimodal over geological time with CUE peaking at intermediate aged soils. Soil organic matter (SOM) content and pH were the most important variables each accounting for 30% of the variation in CUE across sites. Soil pH had a quadratic relationship with CUE, peaking at pH 4.7. Litter carbon to phosphorus (C:P) and nitrogen to phosphorus (N:P) ratios were also significant factors (Pearson’s r = 0.57 and 0.39 respectively). These results demonstrate that CUE changes in complex ways with soil fertility and long-term ecosystem development, and that edaphic factors such as SOM, pH, and litter quality need to be taken into account when predicting CUE for a given system. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.
英文关键词	Carbon use efficiency; Microbial ecology; pH; Soil; Substrate availability and quality
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/184629
作者单位	Department of Biology, San Diego State University, San Diego, CA, United States; Department of Land, Air, and Water Resources, University of California, Davis, CA, United States
推荐引用方式 GB/T 7714	Oliver E.E.,Houlton B.Z.,Lipson D.A.. Controls on soil microbial carbon use efficiency over long-term ecosystem development[J],2021,152(2021-02-03).
APA	Oliver E.E.,Houlton B.Z.,&Lipson D.A..(2021).Controls on soil microbial carbon use efficiency over long-term ecosystem development.Biogeochemistry,152(2021-02-03).
MLA	Oliver E.E.,et al."Controls on soil microbial carbon use efficiency over long-term ecosystem development".Biogeochemistry 152.2021-02-03(2021).