DOI: 10.1111/brv.12554
论文题名: Effects of plant diversity on soil carbon in diverse ecosystems: a global meta-analysis
作者: Chen X. ; Chen H.Y.H. ; Chen C. ; Ma Z. ; Searle E.B. ; Yu Z. ; Huang Z.
刊名: Biological Reviews
ISSN: 14647931
出版年: 2020
卷: 95, 期: 1 语种: 英语
英文关键词: biodiversity
; microbial biomass carbon
; soil carbon content
; soil depth
; stand age
英文摘要: Soil organic carbon (SOC) is a valuable resource for mediating global climate change and securing food production. Despite an alarming rate of global plant diversity loss, uncertainties concerning the effects of plant diversity on SOC remain, because plant diversity not only stimulates litter inputs via increased productivity, thus enhancing SOC, but also stimulates microbial respiration, thus reducing SOC. By analysing 1001 paired observations of plant mixtures and corresponding monocultures from 121 publications, we show that both SOC content and stock are on average 5 and 8% higher in species mixtures than in monocultures. These positive mixture effects increase over time and are more pronounced in deeper soils. Microbial biomass carbon, an indicator of SOC release and formation, also increases, but the proportion of microbial biomass carbon in SOC is lower in mixtures. Moreover, these species-mixture effects are consistent across forest, grassland, and cropland systems and are independent of background climates. Our results indicate that converting 50% of global forests from mixtures to monocultures would release an average of 2.70 Pg C from soil annually over a period of 20 years: about 30% of global annual fossil-fuel emissions. Our study highlights the importance of plant diversity preservation for the maintenance of soil carbon sequestration in discussions of global climate change policy. © 2019 Cambridge Philosophical Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159493
Appears in Collections: 气候变化与战略
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作者单位: Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada; Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, Fujian Normal University, 32 Shangshan Rd, Fuzhou, 350007, China; Institute of Geography, Fujian Normal University, 32 Shangshan Rd, Fuzhou, 350007, China
Recommended Citation:
Chen X.,Chen H.Y.H.,Chen C.,et al. Effects of plant diversity on soil carbon in diverse ecosystems: a global meta-analysis[J]. Biological Reviews,2020-01-01,95(1)