4.7 Article

Plant species diversity enhances soil gross nitrogen transformations in a subtropical forest, southwest China

期刊

JOURNAL OF APPLIED ECOLOGY
卷 60, 期 7, 页码 1364-1375

出版社

WILEY
DOI: 10.1111/1365-2664.14407

关键词

functional N-cycling genes; gross N mineralization; gross N transformation; gross nitrification; microbial N immobilization; plant species diversity; soil N availability; subtropical forest

向作者/读者索取更多资源

Plant species diversity (PSD) has a significant impact on soil nitrogen (N) transformations, with higher PSD enhancing the rates of N mineralization, nitrification, and microbial N immobilization. The effects of PSD on N transformations are mediated through its influence on soil organic matter, mineral, and microbial traits. These findings provide valuable insights for Earth system models to better predict soil N availability and carbon sequestration in response to PSD.
1. Plant species diversity (PSD) regulates ecosystem structure and functions, and is a key issue we need to consider when design vegetation restoration projects. Increasing PSD has been shown to promote or decrease soil nitrogen (N) availability, but the underlying mechanisms have not been well explored. 2. Here, 45 plots with the Shannon-Weiner indices ranging from 0.15 to 3.57 were selected in a subtropical forest to explore the effect of PSD on soil N transformations. 3. Higher PSD significantly enhanced the rates of gross N mineralization, gross nitrification, microbial N immobilization, net N mineralization, net nitrification and the contents of soil total N and inorganic N. Structural equation modelling showed that PSD indirectly impacted gross N transformations via its roles in regulating soil organic matter, mineral and microbial traits. Higher PSD stimulated gross N mineralization and nitrification mainly via its positive effects on microbial biomass content and gene abundances of chiA, archaeal or bacterial amoA, while increased microbial N immobilization mainly due to its stimulation of soil organic matter. 4. Synthesis and applications. Our findings highlight the crucial role of PSD in stimulating soil N availability and provide a mechanistic understanding which can be integrated into Earth system models to better predict soil N availability and C sequestration in response to PSD.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据