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Fungivorous nematodes drive microbial diversity and carbon cycling in soil
Ecology ( IF 4.8 ) Pub Date : 2022-08-12 , DOI: 10.1002/ecy.3844
Jennifer L Kane 1 , James B Kotcon 1 , Zachary B Freedman 2 , Ember M Morrissey 1
Affiliation  

Soil bacteria and fungi mediate terrestrial biogeochemical cycling, but we know relatively little about how trophic interactions influence their community composition, diversity, and function. Specifically, it is unclear how consumer populations affect the activity of microbial taxa they consume, and therefore the interaction of those taxa with other members of the microbial community. Due to its extreme diversity, studying trophic dynamics in soil is a complex feat. Seeking to address these challenges, we performed a microcosm-based consumer manipulation experiment to determine the impact of a common fungal-feeding nematode (Aphelenchus avenae) on soil microbial community composition, diversity, and activity (e.g., C cycling parameters). Fungivory decreased fungal and bacterial α-diversity and stimulated C and N cycling, possibly via cascading impacts of fungivory on bacterial communities. Our results present experimental evidence that soil trophic dynamics are intimately linked with microbial diversity and function, factors that are key in understanding global patterns in biogeochemical cycling.

中文翻译:

食真菌线虫驱动土壤中的微生物多样性和碳循环

土壤细菌和真菌介导陆地生物地球化学循环,但我们对营养相互作用如何影响它们的群落组成、多样性和功能知之甚少。具体而言,尚不清楚消费者群体如何影响他们消费的微生物类群的活动,以及这些类群与微生物群落其他成员的相互作用。由于其极端的多样性,研究土壤中的营养动力学是一项复杂的壮举。为了应对这些挑战,我们进行了一项基于微观世界的消费者操纵实验,以确定一种常见的以真菌为食的线虫 ( Aphelenchus avenae ) 的影响) 对土壤微生物群落组成、多样性和活动(例如,C 循环参数)的影响。Fungivory 降低了真菌和细菌的 α-多样性并刺激了 C 和 N 循环,这可能是通过 fungivory 对细菌群落的级联影响。我们的结果提供了实验证据,表明土壤营养动力学与微生物多样性和功能密切相关,这些因素是理解生物地球化学循环全球模式的关键因素。
更新日期:2022-08-12
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