德国生物多样性综合研究中心 Huang, Yuanyuan 和 Stein, Gideon 团队的研究人员，经过不懈努力揭示了植物多样性能增强草地土壤温度稳定性。该研究于2023年12月4日发表于国际一流学术期刊《自然—地球科学》杂志上。

研究人员对连续 18 年的草地生物多样性实验数据集进行了高时空分辨率的综合分析。研究结果表明，植物多样性作为一种天然的缓冲剂，能在炎热的天气里防止土壤升温，在寒冷的天气里防止土壤降温。这种多样性效应全年持续，并随着实验群落的变老而加剧，在极端气候条件下，如炎热或干旱年份，这种效应甚至更强。

研究使用结构方程模型，发现植物多样性通过增加土壤有机碳浓度来稳定土壤温度，并且在较小程度上增加植物叶面积指数。研究结果强调，在低地草原，多样性引起的土壤温度稳定可能有助于减轻极端气候事件（如土壤碳分解）的负面影响，从而减缓了全球变暖。

据了解，极端天气事件的发生越来越频繁，研究表明，植物多样性可以通过提高植物生产力和生态系统稳定性来帮助减轻气候变化的影响。虽然土壤温度及其稳定性是基本生态系统过程的关键决定因素，但尚未有研究调查植物多样性是否缓冲了长期群落发展中土壤温度的波动。

附：英文原文

Title: Enhanced stability of grassland soil temperature by plant diversity

Author: Huang, Yuanyuan, Stein, Gideon, Kolle, Olaf, Kbler, Karl, Schulze, Ernst-Detlef, Dong, Hui, Eichenberg, David, Gleixner, Gerd, Hildebrandt, Anke, Lange, Markus, Roscher, Christiane, Schielzeth, Holger, Schmid, Bernhard, Weigelt, Alexandra, Weisser, Wolfgang W., Shadaydeh, Maha, Denzler, Joachim, Ebeling, Anne, Eisenhauer, Nico

Issue&Volume: 2023-12-04

Abstract: Extreme weather events are occurring more frequently, and research has shown that plant diversity can help mitigate the impacts of climate change by increasing plant productivity and ecosystem stability. Although soil temperature and its stability are key determinants of essential ecosystem processes, no study has yet investigated whether plant diversity buffers soil temperature fluctuations over long-term community development. Here we have conducted a comprehensive analysis of a continuous 18-year dataset from a grassland biodiversity experiment with high spatial and temporal resolutions. Our findings reveal that plant diversity acts as a natural buffer, preventing soil heating in hot weather and cooling in cold weather. This diversity effect persists year-round, intensifying with the aging of experimental communities and being even stronger under extreme climate conditions, such as hot days or dry years. Using structural equation modelling, we found that plant diversity stabilizes soil temperature by increasing soil organic carbon concentrations and, to a lesser extent, plant leaf area index. Our results suggest that, in lowland grasslands, the diversity-induced stabilization of soil temperature may help to mitigate the negative effects of extreme climatic events such as soil carbon decomposition, thus slowing global warming.

DOI: 10.1038/s41561-023-01338-5

Source: https://www.nature.com/articles/s41561-023-01338-5