Stochastic Processes Derive Gut Fungi Community Assembly of Plateau Pikas (Ochotona curzoniae) along Altitudinal Gradients across Warm and Cold Seasons
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Published:2023-10-20
Issue:10
Volume:9
Page:1032
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ISSN:2309-608X
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Container-title:Journal of Fungi
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language:en
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Short-container-title:JoF
Author:
Tang Xianjiang123ORCID, Zhang Liangzhi12, Ren Shien123, Zhao Yaqi123, Liu Kai4, Zhang Yanming12
Affiliation:
1. Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China 2. Qinghai Provincial Key Laboratory of Animal Ecological Genomics, Xining 810008, China 3. University of Chinese Academy of Sciences, Beijing 100049, China 4. Qinghai Provincial Grassland Station, Xining 810008, China
Abstract
Although fungi occupy only a small proportion of the microbial community in the intestinal tract of mammals, they play important roles in host fat accumulation, nutrition metabolism, metabolic health, and immune development. Here, we investigated the dynamics and assembly of gut fungal communities in plateau pikas inhabiting six altitudinal gradients across warm and cold seasons. We found that the relative abundances of Podospora and Sporormiella significantly decreased with altitudinal gradients in the warm season, whereas the relative abundance of Sarocladium significantly increased. Alpha diversity significantly decreased with increasing altitudinal gradient in the warm and cold seasons. Distance-decay analysis showed that fungal community similarities were significantly and negatively correlated with elevation. The co-occurrence network complexity significantly decreased along the altitudinal gradients as the total number of nodes, number of edges, and degree of nodes significantly decreased. Both the null and neutral model analyses showed that stochastic or neutral processes dominated the gut fungal community assembly in both seasons and that ecological drift was the main ecological process explaining the variation in the gut fungal community across different plateau pikas. Homogeneous selection played a weak role in structuring gut fungal community assembly during the warm season. Collectively, these results expand our understanding of the distribution patterns of gut fungal communities and elucidate the mechanisms that maintain fungal diversity in the gut ecosystems of small mammals.
Funder
Second Tibetan Plateau Scientific Expedition and Research Program Chinese Academy of Sciences–People’s Government of Qinghai Province prevention and control techniques and demonstration of rodent pest in degraded alpine degraded grassland of Plateau pasture National Natural Science Foundation of China Western Light project for interdisciplinary teams
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics,Microbiology (medical)
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