Size exclusion experiment in a grassland field unravels top–down control of the soil fauna on microbial community assembly

IF 7.6 1区 环境科学与生态学 Q1 ECOLOGY
Ecology Letters Pub Date : 2024-06-06 DOI:10.1111/ele.14442
Mathilde Jeanbille, Sana Romdhane, Marie-Christine Breuil, David Bru, Stefan Geisen, Arnaud Mounier, Aymé Spor, Laurent Philippot
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Abstract

Highly diverse and abundant organisms coexist in soils. However, the contribution of biotic interactions between soil organisms to microbial community assembly remains to be explored. Here, we assess the extent to which soil fauna can shape microbial community assembly using an exclusion experiment in a grassland field to sort soil biota based on body size. After 1 year, the exclusion of larger fauna favoured phagotrophic protists, with increases up to 32% in their proportion compared to the no-mesh treatment. In contrast, members of the bacterial community and to a lesser extent of the fungal community were negatively impacted. Shifts in bacterial but not in fungal communities were best explained by the response of the protistan community to exclusion. Our findings provide empirical evidence of top–down control on the soil microbial communities and underline the importance of integrating higher trophic levels for a better understanding of the soil microbiome assembly.

Abstract Image

Abstract Image

草地上的尺寸排除实验揭示了土壤动物群落对微生物群落组合的自上而下的控制。
高度多样化和丰富的生物共存于土壤中。然而,土壤生物之间的生物相互作用对微生物群落组合的贡献仍有待探索。在这里,我们通过在草地上进行排除实验,根据体型大小对土壤生物区系进行分类,从而评估土壤动物在多大程度上能够塑造微生物群落的组合。1 年后,排除大型动物有利于吞噬原生动物,与无网处理相比,吞噬原生动物的比例增加了 32%。相比之下,细菌群落的成员受到了负面影响,真菌群落受到的影响较小。细菌群落的变化而非真菌群落的变化最能解释原生动物群落对排斥的反应。我们的研究结果提供了自上而下控制土壤微生物群落的经验证据,并强调了整合更高的营养级对更好地了解土壤微生物组的重要性。
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
Ecology Letters
Ecology Letters 环境科学-生态学
CiteScore
17.60
自引率
3.40%
发文量
201
审稿时长
1.8 months
期刊介绍: Ecology Letters serves as a platform for the rapid publication of innovative research in ecology. It considers manuscripts across all taxa, biomes, and geographic regions, prioritizing papers that investigate clearly stated hypotheses. The journal publishes concise papers of high originality and general interest, contributing to new developments in ecology. Purely descriptive papers and those that only confirm or extend previous results are discouraged.
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