ABSTRACT

The drainage of peatlands for their agricultural use leads to huge emissions of greenhouse gases. One sustainable alternative is the cultivation of peat mosses after rewetting (‘Sphagnum farming’). Environmental parameters of such artificial systems may differ from those of natural Sphagnum ecosystems which host a rich fungal community. We studied the fungal community at a 4 ha Sphagnum farming field site in Northwestern Germany and compared it with that of natural Sphagnum ecosystems. Additionally, we asked if any fungi occur with potentially negative consequences for the commercial production and/or use of Sphagnum biomass. Samples were collected every 3 months within 1 year. High-throughput sequencing of the fungal ITS2 barcode was used to obtain a comprehensive community profile of the fungi.The dominant taxa in the fungal community of the Sphagnum farming field site were all commonly reported from natural Sphagnum ecosystems. While the taxonomic composition showed clear differences between seasons, a stable functional community profile was identified across seasons. Additionally, nutrient supply seems to affect composition of fungal community. Despite a rather high abundance of bryophyte parasites, and the occurrence of both Sphagnum-species-specific and general plant pathogens, their impact on the productivity and usage of Sphagnum biomass as raw material for growing media was considered to be low.

中文翻译：

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德国西北泥炭藓耕地中泥炭藓相关真菌（真菌生物群）的分类和功能分布的时间动态

摘要

用于农业用途的泥炭地的排水导致大量温室气体的排放。一种可持续的替代方法是在重新润湿后种植泥炭藓（“泥炭藓种植”）。这种人工系统的环境参数可能与天然的不同泥炭生态系统的主机丰富的真菌群落。我们在德国西北部一个4公顷的泥炭藓农业现场研究了真菌群落，并将其与天然泥炭藓生态系统进行了比较。此外，我们问是否与商业化生产和/或使用的潜在负面后果发生的任何真菌泥炭生物质。一年内每3个月收集一次样品。真菌ITS2条码的高通量测序用于获得真菌的全面群落概况。泥炭藓耕地现场真菌群落中的优势类群通常都来自天然泥炭藓生态系统。尽管分类学组成在各个季节之间显示出明显的差异，但是在各个季节之间都可以找到稳定的功能社区概况。此外，营养供应似乎会影响真菌群落的组成。尽管相当高丰度的苔藓植物寄生虫，以及两者发生泥炭-species特异性和一般植物病原体，其对生产和使用的影响泥炭藓 生物质作为生长培养基的原料被认为是低的。