title: Microbial ecology in a future climate: effects of temperature and moisture on microbial communities of two boreal fens.
abstract: Impacts of warming with open-top chambers on microbial communities in wet conditions and in conditions resulting from moderate water-level drawdown (WLD) were studied across 0-50 cm depth in northern and southern boreal sedge fens. Warming alone decreased microbial biomass especially in the northern fen. Impact of warming on microbial PLFA and fungal ITS composition was more obvious in the northern fen and linked to moisture regime and sample depth. Fungal-specific PLFA increased in the surface peat in the drier regime and decreased in layers below 10 cm in the wet regime after warming. OTUs representing Tomentella and Lactarius were observed in drier regime and Mortierella in wet regime after warming in the northern fen. The ectomycorrhizal fungi responded only to WLD. Interestingly, warming together with WLD decreased archaeal 16S rRNA copy numbers in general, and fungal ITS copy numbers in the northern fen. Expectedly, many results indicated that microbial response on warming may be linked to the moisture regime. Results indicated that microbial community in the northern fen representing Arctic soils would be more sensitive to environmental changes. The response to future climate change clearly may vary even within a habitat type, exemplified here by boreal sedge fen.
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland krista.peltoniemi@luke.fi.
authors.forename: Krista
authors.initials: K
authors.lastname: Peltoniemi
authors.affiliation: Natural Resources Institute Finland (Luke), FI-39700 Parkano, Finland.
authors.forename: Raija
authors.initials: R
authors.lastname: Laiho
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Heli
authors.initials: H
authors.lastname: Juottonen
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Oili
authors.initials: O
authors.lastname: Kiikkilä
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Päivi
authors.initials: P
authors.lastname: Mäkiranta
authors.affiliation: Department of Forest Sciences, University of Helsinki, FI-00014 Helsinki, Finland.
authors.forename: Kari
authors.initials: K
authors.lastname: Minkkinen
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Taina
authors.initials: T
authors.lastname: Pennanen
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Timo
authors.initials: T
authors.lastname: Penttilä
authors.affiliation: Natural Resources Institute Finland (Luke), FI-39700 Parkano, Finland.
authors.forename: Tytti
authors.initials: T
authors.lastname: Sarjala
authors.affiliation: School of Forest Sciences, Faculty of Science and Forestry, University of Eastern Finland, FI-80101 Joensuu, Finland.
authors.forename: Eeva-Stiina
authors.initials: ES
authors.lastname: Tuittila
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Tero
authors.initials: T
authors.lastname: Tuomivirta
authors.affiliation: Natural Resources Institute Finland (Luke), FI-01370 Vantaa, Finland.
authors.forename: Hannu
authors.initials: H
authors.lastname: Fritze
mesh_terms: D001105:Archaea / Q000235:genetics / Q000502:physiology; D001110:Arctic Regions; D001487:Basidiomycota / Q000235:genetics / Q000502:physiology; D057231:Climate Change; D017753:Ecosystem; D059013:Microbial Consortia / Q000235:genetics / Q000502:physiology*; D020094:Mortierella / Q000235:genetics / Q000502:physiology; D038821:Mycorrhizae / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012987:Soil; D012988:Soil Microbiology; D013696:Temperature; D053833:Wetlands
chemical_list: D012336:RNA, Ribosomal, 16S; D012987:Soil
keywords: climate warming; fungi; microbial communities; mycorrhizae; peatland; water-level drawdown