Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15319 |
The soil microbial carbon pump: From conceptual insights to empirical assessments | |
Xuefeng Zhu; Randall D. Jackson; Evan H. DeLucia; James M. Tiedje; Chao Liang | |
2020-09-13 | |
发表期刊 | Global Change Biology
![]() |
出版年 | 2020 |
英文摘要 | The global soil carbon (C) pool is massive, so relatively small changes in soil organic carbon (SOC) stocks can significantly alter atmospheric C and global climate. The recently proposed concept of the soil microbial carbon pump (MCP) emphasizes the active role of soil microbes in SOC storage by integrating the continual microbial transformation of organic C from labile to persistent anabolic forms. However, the concept has not been evaluated with data. Here, we combine datasets, including microbial necromass biomarker amino sugars and SOC, from two long‐term agricultural field studies conducted by large United States bioenergy research programs. We interrogate the soil MCP concept by investigating the asynchronous responses of microbial necromass and SOC to land‐use change. Microbial necromass appeared to preferentially accumulate in soil and be the dominant contributor to SOC accrual in diversified perennial bioenergy crops. Specifically, ~92% of the additional SOC enhanced by plant diversity was estimated to be microbial necromass C, and >76% of the additional SOC enhanced by land‐use transition from annual to perennial crops was estimated to be microbial necromass. This suggests that the soil MCP was stimulated in diversified perennial agroecosystems. We further delineate and suggest two parameters—soil MCP capacity and efficacy—reflecting the conversion of plant C into microbial necromass and the contribution of microbial necromass to SOC, respectively, that should serve as valuable metrics for future studies evaluating SOC storage under alternative management in changing climates. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/293943 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Xuefeng Zhu,Randall D. Jackson,Evan H. DeLucia,et al. The soil microbial carbon pump: From conceptual insights to empirical assessments[J]. Global Change Biology,2020. |
APA | Xuefeng Zhu,Randall D. Jackson,Evan H. DeLucia,James M. Tiedje,&Chao Liang.(2020).The soil microbial carbon pump: From conceptual insights to empirical assessments.Global Change Biology. |
MLA | Xuefeng Zhu,et al."The soil microbial carbon pump: From conceptual insights to empirical assessments".Global Change Biology (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论