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

IF 9.8 1区 农林科学 Q1 SOIL SCIENCE Soil Biology & Biochemistry Pub Date : 2024-08-23 DOI:10.1016/j.soilbio.2024.109572
Jianni Sun , Chongzhe Zhang , Daoyuan Yu , Xinyi Yin , Yanhong Cheng , Xiaoyun Chen , Manqiang Liu
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Abstract

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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富氮条件下无脊椎动物性状对垃圾化学加速分解的响应
氮(N)富集会影响废弃物的化学性质,进而影响土壤无脊椎动物和废弃物的分解。然而,在氮富集条件下,土壤无脊椎动物如何对废弃物化学变化做出反应,进而推动废弃物分解的问题一直缺乏关注。在此,我们采用了基于性状的方法来探索鞘翅目(一种重要的功能性无脊椎动物)的功能反应。我们在田间试验中将植物废弃物在环境氮水平(0 千克氮公顷-1 年-1)和氮富集(90 千克氮公顷-1 年-1)地块之间进行了相互移植,量化了鞘翅目昆虫的性状和废弃物分解过程中的废弃物质量损失。结果表明,在富集环境中,富集氮产生的枯落物能招引到具有长触角、长腿和强壮下颚的啮齿类动物,而在环境中,环境产生的枯落物也能招引到具有相同特征的啮齿类动物。鞘翅目昆虫的特征,包括触角与身体的比率、腿与身体的比率和下颚宽度与长度的比率,与氮富集下的高垃圾分解率相吻合。总之,研究结果证明,具有较强资源获取能力的鞘翅目昆虫会对枯落物化学成分的变化做出反应,而这种变化会进一步加速氮富集条件下枯落物的分解。我们的研究结果表明,采用基于性状的方法将枯落物与无脊椎动物联系起来,将促进对全球变化下受生物调控的生态系统过程的理解。
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来源期刊
Soil Biology & Biochemistry
Soil Biology & Biochemistry 农林科学-土壤科学
CiteScore
16.90
自引率
9.30%
发文量
312
审稿时长
49 days
期刊介绍: Soil Biology & Biochemistry publishes original research articles of international significance focusing on biological processes in soil and their applications to soil and environmental quality. Major topics include the ecology and biochemical processes of soil organisms, their effects on the environment, and interactions with plants. The journal also welcomes state-of-the-art reviews and discussions on contemporary research in soil biology and biochemistry.
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