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Complex effects of ...
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest-tundra ecotone
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- Vowles, Tage (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Institutionen för geovetenskaper,Department of Biological and Environmental Sciences,Department of Earth Sciences
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- Lindwall, Frida (author)
- Terrestrial Ecology, Department of Biology, University of Copenhagen, Copenhagen, Denmark; Center for Permafrost, Department of Geoscience and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark,Univ Copenhagen, Terr Ecol, Dept Biol, Copenhagen, Denmark; Univ Copenhagen, Ctr Permafrost, Dept Geosci & Nat Resource Management, Copenhagen, Denmark
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- Ekblad, Alf, 1957- (author)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Örebro Univ, Sch Sci & Technol, Örebro, Sweden
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- Bahram, Mohammad (author)
- Uppsala universitet,Systematisk biologi,Univ Tartu, Dept Bot, Inst Ecol & Earth Sci, Tartu, Estonia
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- Furneaux, Brendan R. (author)
- Uppsala universitet,Systematisk biologi
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- Ryberg, Martin (author)
- Uppsala universitet,Systematisk biologi
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- Björk, Robert G., 1974 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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(creator_code:org_t)
- 2017-12-14
- 2018
- English.
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In: Ecology and Evolution. - : John Wiley & Sons. - 2045-7758. ; 8:2, s. 1019-1030
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Abstract
Subject headings
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- Mycorrhizal associations are widespread in high-latitude ecosystems and are potentially of great importance for global carbon dynamics. Although large herbivores play a key part in shaping subarctic plant communities, their impact on mycorrhizal dynamics is largely unknown. We measured extramatrical mycelial (EMM) biomass during one growing season in 16-year-old herbivore exclosures and unenclosed control plots (ambient), at three mountain birch forests and two shrub heath sites, in the Scandes forest-tundra ecotone. We also used high-throughput amplicon sequencing for taxonomic identification to investigate differences in fungal species composition. At the birch forest sites, EMM biomass was significantly higher in exclosures (1.36 +/- 0.43g C/m(2)) than in ambient conditions (0.66 +/- 0.17g C/m(2)) and was positively influenced by soil thawing degree-days. At the shrub heath sites, there was no significant effect on EMM biomass (exclosures: 0.72 +/- 0.09g C/m(2); ambient plots: 1.43 +/- 0.94). However, EMM biomass was negatively related to Betula nana abundance, which was greater in exclosures, suggesting that grazing affected EMM biomass positively. We found no significant treatment effects on fungal diversity but the most abundant ectomycorrhizal lineage/cortinarius, showed a near-significant positive effect of herbivore exclusion (p=.08), indicating that herbivory also affects fungal community composition. These results suggest that herbivory can influence fungal biomass in highly context-dependent ways in subarctic ecosystems. Considering the importance of root-associated fungi for ecosystem carbon balance, these findings could have far-reaching implications.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- Betula nana
- Betula pubescens subsp
- czerepanovii
- ectomycorrhiza
- extramatrical mycelia
- herbivory
- mountain birch forest
- shrub heath
- Betula nana
- Betula pubescens subsp. czerepanovii
- ectomycorrhiza
- extramatrical mycelia
- herbivory
- mountain birch forest
- shrub heath
Publication and Content Type
- ref (subject category)
- art (subject category)
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