Multiple global change factors cause declines of a temperate bryophyte
Virtanen, Risto; Harpole, W. Stanley; Dunker, Susanne; Eskelinen, Anu (2024-04-09)
Avaa tiedosto
Sisältö avataan julkiseksi: 09.04.2025
Taylor & Francis
09.04.2024
Virtanen, R., Harpole, W. S., Dunker, S., & Eskelinen, A. (2024). Multiple global change factors cause declines of a temperate bryophyte. Plant Ecology & Diversity, 17(1–2), 35–46. https://doi.org/10.1080/17550874.2024.2330659
https://creativecommons.org/licenses/by-nc-nd/4.0/
Copyright © 2024 Informa UK Limited. This is an Accepted Manuscript version of the following article, accepted for publication in Plant Ecology and Diversity. Virtanen, R., Harpole, W. S., Dunker, S., & Eskelinen, A. (2024). Multiple global change factors cause declines of a temperate bryophyte. Plant Ecology & Diversity, 17(1–2), 35–46. It is deposited under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
https://creativecommons.org/licenses/by-nc-nd/4.0/
Copyright © 2024 Informa UK Limited. This is an Accepted Manuscript version of the following article, accepted for publication in Plant Ecology and Diversity. Virtanen, R., Harpole, W. S., Dunker, S., & Eskelinen, A. (2024). Multiple global change factors cause declines of a temperate bryophyte. Plant Ecology & Diversity, 17(1–2), 35–46. It is deposited under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
https://creativecommons.org/licenses/by-nc-nd/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202406144505
https://urn.fi/URN:NBN:fi:oulu-202406144505
Tiivistelmä
Abstract
Background:
Climate change, nutrient enrichment and land use have been predicted to alter bryophyte abundance and performance; we expect these factors to interact, yet experiments addressing their joint effects are missing.
Aims:
We tested the responses of Brachythecium rutabulum, a common temperate moss species, to single and combined effects of future climatic conditions, grazing, light limitation and nutrient enrichment. We predicted that future climatic conditions, intense grazing, light limitation and nutrient enrichment have all negative effects on the survival and photosynthetic condition of B. rutabulum, and their joint effects become strong even if individual factors have only weak effects (multiple stress hypothesis).
Methods:
We measured after two growing seasons biomass and chlorophyll fluorescence of transplanted moss colonies in full-factorial treatments of fertilisation, exclusion of sheep grazing and light amendment by LED lamps, replicated in ambient and future climatic conditions.
Results:
Future climate and fertilisation had negligible effects on colony biomass and chlorophyll fluorescence of bryophyte colonies, whereas light amendment had positive effect on chlorophyll fluorescence and grazing exclusion had positive effect on colony biomass. Colony biomass and chlorophyll fluorescence decreased with increasing number of global change factors.
Conclusion:
Supporting the multiple stress hypothesis, individually weak global change factors can combine to strong joint effects.
Background:
Climate change, nutrient enrichment and land use have been predicted to alter bryophyte abundance and performance; we expect these factors to interact, yet experiments addressing their joint effects are missing.
Aims:
We tested the responses of Brachythecium rutabulum, a common temperate moss species, to single and combined effects of future climatic conditions, grazing, light limitation and nutrient enrichment. We predicted that future climatic conditions, intense grazing, light limitation and nutrient enrichment have all negative effects on the survival and photosynthetic condition of B. rutabulum, and their joint effects become strong even if individual factors have only weak effects (multiple stress hypothesis).
Methods:
We measured after two growing seasons biomass and chlorophyll fluorescence of transplanted moss colonies in full-factorial treatments of fertilisation, exclusion of sheep grazing and light amendment by LED lamps, replicated in ambient and future climatic conditions.
Results:
Future climate and fertilisation had negligible effects on colony biomass and chlorophyll fluorescence of bryophyte colonies, whereas light amendment had positive effect on chlorophyll fluorescence and grazing exclusion had positive effect on colony biomass. Colony biomass and chlorophyll fluorescence decreased with increasing number of global change factors.
Conclusion:
Supporting the multiple stress hypothesis, individually weak global change factors can combine to strong joint effects.
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