An integrated fast–slow plant and nematode economics spectrum predicts soil organic carbon dynamics during natural restoration

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2024-10-04 DOI:10.1111/nph.20166

Chongzhe Zhang, Tongbin Zhu, Uffe N. Nielsen, Ian J. Wright, Na Li, Xiaoyun Chen, Manqiang Liu

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引用次数: 0

Abstract

Aboveground and belowground attributes of terrestrial ecosystems interact to shape carbon (C) cycling. However, plants and soil organisms are usually studied separately, leading to a knowledge gap regarding their coordinated contributions to ecosystem C cycling.
We explored whether integrated consideration of plant and nematode traits better explained soil organic C (SOC) dynamics than plant or nematode traits considered separately. Our study system was a space-for-time natural restoration chronosequence following agricultural abandonment in a subtropical region, with pioneer, early, mid and climax stages.
We identified an integrated fast–slow trait spectrum encompassing plants and nematodes, demonstrating coordinated shifts from fast strategies in the pioneer stage to slow strategies in the climax stage, corresponding to enhanced SOC dynamics. Joint consideration of plant and nematode traits explained more variation in SOC than by either group alone. Structural equation modeling revealed that the integrated fast–slow trait spectrum influenced SOC through its regulation of microbial traits, including microbial C use efficiency and microbial biomass.
Our findings confirm the pivotal role of plant-nematode trait coordination in modulating ecosystem C cycling and highlight the value of incorporating belowground traits into biogeochemical cycling under global change scenarios.

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综合快慢植物和线虫经济光谱可预测自然恢复过程中的土壤有机碳动态。

陆地生态系统的地上和地下属性相互作用，形成碳（C）循环。然而，植物和土壤生物通常是分开研究的，这导致了关于它们对生态系统碳循环的协调贡献的知识空白。我们探讨了综合考虑植物和线虫性状是否比单独考虑植物或线虫性状更能解释土壤有机碳（SOC）动态。我们的研究系统是亚热带地区农业废弃后的时空自然恢复序列，包括先驱阶段、早期阶段、中期阶段和高潮阶段。我们发现了包括植物和线虫在内的快慢综合性状谱，证明了从先驱阶段的快速策略到高潮阶段的慢速策略的协调转变，这与增强的 SOC 动态是一致的。联合考虑植物和线虫的性状比单独考虑任何一类性状都能解释更多的 SOC 变化。结构方程建模显示，综合快慢性状谱通过调节微生物性状（包括微生物碳利用效率和微生物生物量）来影响 SOC。我们的研究结果证实了植物-线虫性状协调在调节生态系统碳循环中的关键作用，并强调了在全球变化情景下将地下性状纳入生物地球化学循环的价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.