Molecular evidence strongly supports deadwood-inhabiting fungi exhibiting unexpected tree species preferences in temperate forests

作者：Witoon Purahong, Tesfaye Wubet, Dirk Krüger, François Buscot · 发表于：The ISME Journal · 年份：2017 · DOI：10.1038/ismej.2017.177 · 被引用次数：135 · 研究领域：Forest Ecology and Biodiversity Studies、Mycorrhizal Fungi and Plant Interactions、Plant Pathogens and Fungal Diseases

Wood-inhabiting fungi have essential roles in the regulation of carbon stocks and nutrient cycling in forest ecosystems. However, knowledge pertaining to wood-inhabiting fungi is only fragmentary and controversial. Here we established a large-scale deadwood experiment with 11 tree species to investigate diversity and tree species preferences of wood-inhabiting fungi using next-generation sequencing. Our results contradict existing knowledge based on sporocarp surveys and challenge current views on their distribution and diversity in temperate forests. Analyzing α-, β- and γ-diversity, we show that diverse fungi colonize deadwood at different spatial scales. Specifically, coniferous species have higher α- and γ-diversity than the majority of analyzed broadleaf species, but two broadleaf species showed the highest β-diversity. Surprisingly, we found nonrandom co-occurrence (P<0.001) and strong tree species preferences of wood-inhabiting fungi, especially in broadleaf trees (P<0.01). Our results indicate that the saprotrophic fungal community is more specific to tree species than previously thought.