Sustainable Land Use Enhances Soil Microbial Respiration Responses to Experimental Heat Stress

作者：Rémy Beugnon, Nico Eisenhauer, Alfred Lochner, Margarete J. Blechinger, Paula E. Buhr, Simone Cesarz, Monica Farfan, Olga Ferlian, Amanda J. Rompeltien Howard, Yuanyuan Huang, Blanca S. Kuhlmann, Nora Lienicke, Selma Mählmann, Anneke Nowka, Emanuel Petereit, Christian Ristok, Martin Schädler, Jonas T. M. Schmid, Lara J. Schulte, Kora‐Lene Seim, Lise Thouvenot, Raphael Tremmel, Lara Weber, Jule Weitowitz, Huimin Yi, Marie Sünnemann · 发表于：Global Change Biology · 年份：2025 · DOI：10.1111/gcb.70214 · 被引用次数：15 · 研究领域：Soil Carbon and Nitrogen Dynamics、Microbial Community Ecology and Physiology、Gut microbiota and health

Soil microbial communities provide numerous ecosystem functions, such as nutrient cycling, decomposition, and carbon storage. However, global change, including land-use and climate changes, affects soil microbial communities and activity. As extreme weather events (e.g., heatwaves) tend to increase in magnitude and frequency, we investigated the effects of heat stress on the activity (e.g., respiration) of soil microbial communities that had experienced four different long-term land-use intensity treatments (ranging from extensive grassland and intensive grassland to organic and conventional croplands) and two climate conditions (ambient vs. predicted future climate). We hypothesized that both intensive land use and future climate conditions would reduce soil microbial respiration (H1) and that experimental heat stress would increase microbial respiration (H2). However, this increase would be less pronounced in soils with a long-term history of high-intensity land use and future climate conditions (H3), and soils with a higher fungal-to-bacterial ratio would show a more moderate response to warming (H4). Our study showed that soil microbial respiration was reduced under high land-use intensity (i.e., -43% between extensive grassland and conventional cropland) and future climate conditions (-12% in comparison to the ambient climate). Moreover, heat stress increased overall microbial respiration (+17% per 1°C increase), while increasing land-use intensity reduced the strength o...