Spore dispersal of basidiomycete fungi at the landscape scale is driven by stochastic and deterministic processes and generates variability in plant-fungal interactions
Spore dispersal of basidiomycete fungi at the landscape scale is driven by stochastic and deterministic processes and generates variability in plant-fungal interactions
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DOI：
10.1111/nph.12906
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发表时间：
2014-10-01
期刊：
影响因子：
9.4
通讯作者：
Bruns, Thomas D.
中科院分区：
文献类型：
--
作者：
Peay, Kabir G.;Bruns, Thomas D.
真菌在植物群落和生态系统功能中起着重要作用。因此，真菌群落组成的变化可能对植物适合度产生重要影响。然而，有相对较少的经验数据扩散可能会影响真菌群落和生态过程，他们mediated.We建立了采样站在大面积的沿海景观不同的空间接近彼此和对比的植被类型。我们使用qPCR和454焦磷酸测序测量了来自一组关键真菌Basidomycota的孢子在整个景观中的传播。我们还测量了外生菌根真菌在每个站使用无菌诱饵苗的殖民化。我们发现了一个高度的空间和时间变化的组成担子菌孢子。这种变化部分是随机的，部分解释了空间接近其他植被类型和一年中的时间。孢子群落的变化也影响外生菌根真菌的定殖和幼苗生长。我们的研究结果表明，真菌的寄主和生境特异性加上扩散限制，可以导致真菌群落结构和植物-真菌相互作用的局部变化。了解真菌群落还需要明确的知识景观背景，除了当地的环境条件。
Fungi play an important role in plant communities and ecosystem function. As a result, variation in fungal community composition can have important consequences for plant fitness. However, there are relatively few empirical data on how dispersal might affect fungal communities and the ecological processes they mediate.We established sampling stations across a large area of coastal landscape varying in their spatial proximity to each other and contrasting vegetation types. We measured dispersal of spores from a key group of fungi, the Basidomycota, across this landscape using qPCR and 454 pyrosequencing. We also measured the colonization of ectomycorrhizal fungi at each station using sterile bait seedlings.We found a high degree of spatial and temporal variability in the composition of Basidiomycota spores. This variability was in part stochastic and in part explained by spatial proximity to other vegetation types and time of year. Variation in spore community also affected colonization by ectomycorrhizal fungi and seedling growth.Our results demonstrate that fungal host and habitat specificity coupled with dispersal limitation can lead to local variation in fungal community structure and plant-fungal interactions. Understanding fungal communities also requires explicit knowledge of landscape context in addition to local environmental conditions.