Linking molecular deadwood-inhabiting fungal diversity and community dynamics to ecosystem functions and processes in Central European forests
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- 作者：Björn Hoppe ; Witoon Purahong ; Tesfaye Wubet ; Tiemo Kahl ; Jürgen Bauhus…
- 刊名：Fungal Diversity
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：77
- 期：1
- 页码：367-379
- 全文大小：2,057 KB
- 刊物主题：Biodiversity; Microbial Ecology; Fungus Genetics; Medical Microbiology; Microbiology;
- 出版者：Springer Netherlands
- ISSN：1878-9129
- 卷排序：77
文摘
Fungi play vital roles in the decomposition of deadwood due to their secretion of various enzymes that break down plant cell-wall complexes. The compositions of wood-inhabiting fungal (WIF) communities change over the course of the decomposition process as the remaining mass of wood decreases and both abiotic and biotic conditions of the wood significantly change. It is currently not resolved which substrate-related factors govern these changes in WIF communities and whether such changes influence the deadwood decomposition rate. Here we report a study on fungal richness and community structure in deadwood of Norway spruce and European beech in temperate forest ecosystems using 454 pyrosequencing. Our aims were to disentangle the factors that correspond to WIF community composition and to investigate the links between fungal richness, taxonomically-resolved fungal identity, and microbial-mediated ecosystem functions and processes by analyzing physico-chemical wood properties, lignin-modifying enzyme activities and wood decomposition rates. Unlike fungal richness, we found significant differences in community structure between deadwood of different tree species. The composition of WIF communities was related to the physico-chemical properties of the deadwood substrates. Decomposition rates and the activities of lignin-modifying enzymes were controlled by the succession of the fungal communities and competition scenarios rather than fungal OTU richness. Our results provide further insights into links between fungal community structure and microbial-mediated ecosystem functions and processes.KeywordsEcosystem processesEnzyme activityWood decayPhysico-chemical wood propertiesAscomycetesBasidiomycetesPyrosequencing