Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone
Abstract 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 extr...
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crwiley:10.1002/ece3.3657 2024-10-13T14:06:25+00:00 Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone Vowles, Tage Lindwall, Frida Ekblad, Alf Bahram, Mohammad Furneaux, Brendan R. Ryberg, Martin Björk, Robert G. Eesti Teadusfondi 2017 http://dx.doi.org/10.1002/ece3.3657 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3657 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3657 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 8, issue 2, page 1019-1030 ISSN 2045-7758 2045-7758 journal-article 2017 crwiley https://doi.org/10.1002/ece3.3657 2024-09-17T04:50:38Z Abstract 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 ± 0.43 g C/m 2 ) than in ambient conditions (0.66 ± 0.17 g 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 ± 0.09 g 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. Article in Journal/Newspaper Betula nana Subarctic Tundra Wiley Online Library Ecology and Evolution 8 2 1019 1030 |
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Wiley Online Library |
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language |
English |
description |
Abstract 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 ± 0.43 g C/m 2 ) than in ambient conditions (0.66 ± 0.17 g 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 ± 0.09 g 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. |
author2 |
Eesti Teadusfondi |
format |
Article in Journal/Newspaper |
author |
Vowles, Tage Lindwall, Frida Ekblad, Alf Bahram, Mohammad Furneaux, Brendan R. Ryberg, Martin Björk, Robert G. |
spellingShingle |
Vowles, Tage Lindwall, Frida Ekblad, Alf Bahram, Mohammad Furneaux, Brendan R. Ryberg, Martin Björk, Robert G. Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
author_facet |
Vowles, Tage Lindwall, Frida Ekblad, Alf Bahram, Mohammad Furneaux, Brendan R. Ryberg, Martin Björk, Robert G. |
author_sort |
Vowles, Tage |
title |
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
title_short |
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
title_full |
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
title_fullStr |
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
title_full_unstemmed |
Complex effects of mammalian grazing on extramatrical mycelial biomass in the Scandes forest‐tundra ecotone |
title_sort |
complex effects of mammalian grazing on extramatrical mycelial biomass in the scandes forest‐tundra ecotone |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ece3.3657 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3657 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3657 |
genre |
Betula nana Subarctic Tundra |
genre_facet |
Betula nana Subarctic Tundra |
op_source |
Ecology and Evolution volume 8, issue 2, page 1019-1030 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.3657 |
container_title |
Ecology and Evolution |
container_volume |
8 |
container_issue |
2 |
container_start_page |
1019 |
op_container_end_page |
1030 |
_version_ |
1812812556367036416 |