Distinct biogeographic patterns in Glomeromycotinian and Mucoromycotinian arbuscular mycorrhizal fungi across China: A meta-analysis.
Distinct biogeographic patterns in Glomeromycotinian and Mucoromycotinian arbuscular mycorrhizal fungi across China: A meta-analysis.
复制标题
中国球囊菌亚门和毛霉亚门丛枝菌根真菌的独特生物地理模式：荟萃分析。
DOI：
10.1016/j.scitotenv.2023.168907
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Liu Z
中科院分区：
文献类型：
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作者：
Liu Z
细根内生菌，最近重新分类为毛霉属丛枝菌根真菌（Mucoromycotinian arbuscular mycorrhizal fungi，M-AMF），现在被认为是具有重要功能的Glomeromycotinian AMF（G-AMF）。然而，很少有人知道的M-AMF和G-AMF社区的植物地理学和生态学，特别是在大规模上，阻止系统评估生态系统的多样性和功能。本文利用已发表的18 SrDNA扩增子数据集和相关元数据，对中国6个生态系统的575个土壤样品的G-AMF和M-AMF的地理组装和生态多样性格局进行了研究。与G-AMF相比，推定的M-AMF在自然/半自然地点中很少见，它们的群落是以强烈干扰为特征的农业地点群落的子集，这表明它们可以占据不同的生态位。空间和环境因素（例如，植被类型）显着影响了两种真菌群落，土壤总氮和年平均降水量分别是G-AMF和M-AMF丰富度的最强预测因子。两组都表现出很强的空间距离-衰减关系，M-AMF更多地受到环境过滤而不是空间效应的影响，而G-AMF则相反，这可能是因为随机性（例如，而M-AMF在群落水平上的生态位宽度较G-AMF窄，表明其对环境差异的敏感性更高。此外，G-AMF和M-AMF之间的共现网络链接在整个生态系统中普遍存在，并被预测在稳定包含这两种真菌的整体群落中发挥关键作用。基于宏观生态空间尺度数据，本研究为中国大陆尺度上两个AMF类群具有明显的生态偏好提供了有力证据，同时也揭示了人类活动对AMF分布的潜在影响。这些结果推进了我们的知识，在陆地生态系统中的两个真菌群体之间的生态差异，这表明需要进一步的实地调查，可能会导致一个更复杂的理解生态系统功能和可持续管理。
Fine root endophytes, recently reclassified as Mucoromycotinian arbuscular mycorrhizal fungi (M-AMF), are now recognized as functionally important as Glomeromycotinian AMF (G-AMF). However, little is known about the biogeography and ecology of M-AMF and G-AMF communities, particularly on a large scale, preventing a systematic assessment of ecosystem diversity and functioning. Here, we investigated the biogeographic assemblies and ecological diversity patterns of both G-AMF and M-AMF, using published 18S rDNA amplicon datasets and associated metadata from 575 soil samples in six ecosystems across China. Contrasting with G-AMF, putative M-AMF were rare in natural/semi-natural sites, where their communities were a subset of those in agricultural sites characterized by intensive disturbances, suggesting different ecological niches that they could occupy. Spatial and environmental factors (e.g.,vegetation type) significantly influenced both fungal communities, with soil total‑nitrogen and mean-annual-precipitation being the strongest predictors for G-AMF and M-AMF richness, respectively. Both groups exhibited a strong spatial distance-decay relationship, shaped more by environmental filtering than spatial effects for M-AMF, and the opposite for G-AMF, presumably because stochasticity (e.g.,drift) dominantly structured G-AMF communities; while the narrower niche breadth (at community-level) of M-AMF compared to G-AMF suggested its more susceptibility to environmental differences. Furthermore, co-occurrence network links between G-AMF and M-AMF were prevalent across ecosystems, and were predicted to play a key role in stabilizing overall communities harboring both fungi. Based on the macroecological spatial scale datasets, this study provides solid evidence that the two AMF groups have distinct ecological preferences at the continental scale in China, and also highlights the potential impacts of anthropogenic activities on distributions of AMF. These results advance our knowledge of the ecological differences between the two fungal groups in terrestrial ecosystems, suggesting the need for further field-based investigation that may lead to a more sophisticated understanding of ecosystem function and sustainable management.