title: Experimental Evidence that Fungi are Dominant Microbes in Carbon Content and Growth Response to Added Soluble Organic Carbon in Moss-rich Tundra Soil.
abstract: Global warming significantly affects Arctic tundra, including permafrost thaw and soluble C release that may differentially affect tundra microbial growth. Using laboratory experiments, we report some of the first evidence for the effects of soluble glucose-C enrichment on tundra soil prokaryotes (bacteria and archaea) and fungi, with comparisons to microbial eukaryotes. Fungal increase in C-biomass was equivalent to 10% (w/w) of the added glucose-C, and for prokaryote biomass 2% (w/w), the latter comparable to prior published results. The C-gain after 14 d was 1.3 mg/g soil for fungi, and ~200 μg/g for prokaryotes.
authors.affiliation: Biology, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, 10964.
authors.forename: O Roger
authors.initials: OR
authors.lastname: Anderson
authors.affiliation: Ecology, Evolution and Environmental Biology, Columbia University, New York City, New York.
authors.forename: Jee Min
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Ecology, Evolution and Environmental Biology, Columbia University, New York City, New York.|Biology, Barnard College, Columbia University, New York City, New York, 10027.
authors.forename: Krista
authors.initials: K
authors.lastname: McGuire
mesh_terms: D001105:Archaea / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism; D018533:Biomass; D002244:Carbon / Q000378:metabolism*; D017753:Ecosystem; D056890:Eukaryota / Q000378:metabolism; D005658:Fungi / Q000145:classification / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification*; D057232:Global Warming; D005947:Glucose / Q000378:metabolism; D012988:Soil Microbiology; D044003:Sphagnopsida; D065929:Tundra
chemical_list: D002244:Carbon; D005947:Glucose
keywords: Biogeochemical C cycle; climate change; ecosystem C dynamics; terrestrial microbial ecology; tundra soil trophic relations