Plant interaction traits determine the biomass of arbuscular mycorrhizal fungi and bacteria in soil

IF 4.4 2区 环境科学与生态学 Q1 ECOLOGY
Ecology Pub Date : 2025-02-25 DOI:10.1002/ecy.70011
Natascha Lewe, Robert A. Keyzers, Jason M. Tylianakis, Julie R. Deslippe
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引用次数: 0

Abstract

Plant–arbuscular mycorrhizal fungal (AMF) mutualisms are crucial to ecosystem biodiversity and productivity. Yet, our understanding of the functional roles of plants as AMF generalists or specialists, and the consequences of these plant interaction traits for soil ecosystems are virtually unknown. We grew eight pasture plant species under two experimental conditions, sequencing their root AMF communities to assess interaction traits using a range of numeric and phylogenetic diversity metrics, thereby characterizing each plant species' interaction generalism with AMF. We used lipid analysis of rhizosphere soils and Bayesian modeling to explore how host interaction traits affected carbon allocation to AMF and bacteria. We found that plant interaction traits for AMF remained stable despite large variation in soil conditions and AMF pools. Host interaction generalism was linked to contrasting patterns in bacterial and AMF biomass: Phylogenetic diversity in plant interactions was positively associated with AMF biomass, while numeric diversity was negatively associated with bacterial biomass in rhizosphere soils. Explicit consideration of plant interaction niches may enhance understanding of how changes in biodiversity affect ecosystem carbon cycling.

Abstract Image

植物互作性状决定了土壤丛枝菌根真菌和细菌的生物量
植物与丛枝菌根真菌(AMF)的共生关系对生态系统的生物多样性和生产力至关重要。然而,我们对植物作为AMF通才或专家的功能角色的理解,以及这些植物相互作用特性对土壤生态系统的影响几乎是未知的。在两种实验条件下培养8种牧草植物,对其根系AMF群落进行测序,利用一系列数值和系统发育多样性指标评估相互作用特征,从而表征每种植物与AMF的相互作用普遍性。我们利用根际土壤脂质分析和贝叶斯模型来探讨寄主互作性状如何影响AMF和细菌的碳分配。结果表明,尽管土壤条件和AMF库变化较大,但AMF的植物互作性状保持稳定。宿主相互作用的普遍性与细菌和AMF生物量的对比模式有关:植物相互作用的系统发育多样性与AMF生物量呈正相关,而根际土壤中数量多样性与细菌生物量呈负相关。明确考虑植物相互作用生态位可以增强对生物多样性变化如何影响生态系统碳循环的理解。
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来源期刊
Ecology
Ecology 环境科学-生态学
CiteScore
8.30
自引率
2.10%
发文量
332
审稿时长
3 months
期刊介绍: Ecology publishes articles that report on the basic elements of ecological research. Emphasis is placed on concise, clear articles documenting important ecological phenomena. The journal publishes a broad array of research that includes a rapidly expanding envelope of subject matter, techniques, approaches, and concepts: paleoecology through present-day phenomena; evolutionary, population, physiological, community, and ecosystem ecology, as well as biogeochemistry; inclusive of descriptive, comparative, experimental, mathematical, statistical, and interdisciplinary approaches.
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