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Assembly processes of trophic guilds in the root mycobiome of temperate forests
Author(s) -
Schröter Kristina,
Wemheuer Bernd,
Pena Rodica,
Schöning Ingo,
Ehbrecht Martin,
Schall Peter,
Ammer Christian,
Daniel Rolf,
Polle Andrea
Publication year - 2019
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1111/mec.14887
Subject(s) - biology , trophic level , ecology , edaphic , temperate forest , temperate rainforest , ecosystem , abiotic component , forest ecology , habitat , temperate climate , soil water
Root‐associated mycobiomes ( RAM s) link plant and soil ecological processes, thereby supporting ecosystem functions. Understanding the forces that govern the assembly of RAM s is key to sustainable ecosystem management. Here, we dissected RAM s according to functional guilds and combined phylogenetic and multivariate analyses to distinguish and quantify the forces driving RAM assembly processes. Across large biogeographic scales (>1,000 km) in temperate forests (>100 plots), RAM s were taxonomically highly distinct but composed of a stable trophic structure encompassing symbiotrophic, ectomycorrhizal (55%), saprotrophic (7%), endotrophic (3%) and pathotrophic fungi (<1%). Taxonomic community composition of RAM s is explained by abiotic factors, forest management intensity, dominant tree family ( Fagaceae , Pinaceae ) and root resource traits. Local RAM assemblies are phylogenetically clustered, indicating stronger habitat filtering on roots in dry, acid soils and in conifer stands than in other forest types. The local assembly of ectomycorrhizal communities is driven by forest management intensity. At larger scales, root resource traits and soil p H shift the assembly process of ectomycorrhizal fungi from deterministic to neutral. Neutral or weak deterministic assembly processes are prevalent in saprotrophic and endophytic guilds. The remarkable consistency of the trophic composition of the RAM s suggests that temperate forests attract fungal assemblages that afford functional resilience under the current range of climatic and edaphic conditions. At local scales, the filtering processes that structure symbiotrophic assemblies can be influenced by forest management and tree selection, but at larger scales, environmental cues and host resource traits are the most prevalent forces.