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Responses of invertebrate traits to litter chemistry accelerate decomposition under nitrogen enrichment

文献类型： 外文期刊

作者： Sun, Jianni 1 ; Zhang, Chongzhe 1 ; Yu, Daoyuan 1 ; Yin, Xinyi 1 ; Cheng, Yanhong 3 ; Chen, Xiaoyun 1 ; Liu, Manqiang 2 ;

作者机构： 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Soil Ecol Lab, Nanjing 210095, Peoples R China

2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Ctr Grassland Microbiome, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou 730020, Gansu, Peoples R China

3.Jiangxi Inst Red Soil & Gerplerm Resources, Key Lab Arable Land Improvement & Qual Improvement, Nanchang 330029, Peoples R China

4.Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing 210095, Peoples R China

关键词： Trait-based approach; Global change; Soil biodiversity; Ecosystem process; Soil mesofauna; Collembola traits

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：10.3； 五年影响因子：11.5 ）

ISSN： 0038-0717

年卷期： 2024 年 198 卷

页码：

收录情况： SCI

摘要： Nitrogen (N) enrichment shapes litter chemistry, subsequently influencing soil invertebrates and litter decomposition. However, there has been a lack of attention to how soil invertebrates respond to changes in litter chemistry and then drive litter decomposition under N enrichment. Here, trait-based approaches were adopted to explore functional responses of Collembola, a crucial and functional group of invertebrates. We conducted reciprocal transplantation of plant litter between ambient N levels (0 kg N ha(-1) yr(-1)) and N enrichment (90 kg N ha(-1) yr(-1)) plots in a field experiment, quantifying Collembola traits and litter mass loss during litter decomposition process. Results showed that N enrichment-derived litter recruited Collembola with long antenna, legs, and strong mandibles in enrichment environment, while Collembola with same traits were recruited by ambient- derived litter in ambient environment. Collembola traits, including antenna to body ratio, leg to body ratio, and mandible width to length ratio, coincided with high litter decomposition rates under N enrichment. Overall, the results provide evidence that Collembola with strong resource acquisition abilities responded to changes in litter chemistry, and such shifts further accelerate litter decomposition under N enrichment. Our findings demonstrate that adopting trait-based approaches to link litter and invertebrates would advance the understanding of ecosystem processes governed by biological regulation under global change.

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