The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath
Global warming affects species diversity and ecosystems throughout the world, and alpine and arctic plant communities are considered to be particularly sensitive. During the last decades, several studies have shown a shift in species composition and a movement of species to higher elevations. Long-t...
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Norwegian University of Life Sciences, Ås
2018
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Online Access: | http://hdl.handle.net/11250/2567612 |
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ftunivmob:oai:nmbu.brage.unit.no:11250/2567612 2023-05-15T15:16:31+02:00 The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath Hasvik, Åshild Klanderud, Kari Asplund, Johan Roos, Ruben Erik Norway 2018 application/pdf http://hdl.handle.net/11250/2567612 eng eng Norwegian University of Life Sciences, Ås http://hdl.handle.net/11250/2567612 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no CC-BY-NC-ND 34 Dryas octopetala Climate change VDP::Matematikk og Naturvitenskap: 400 Master thesis 2018 ftunivmob 2021-09-23T20:16:53Z Global warming affects species diversity and ecosystems throughout the world, and alpine and arctic plant communities are considered to be particularly sensitive. During the last decades, several studies have shown a shift in species composition and a movement of species to higher elevations. Long-term warming studies have been conducted in these areas, with the aim to better understand and predict how consequences of global warming will affect the flora in cold climate ecosystems. In this thesis, I have collected data from an on-going, 17-year-old, warming experiment in an alpine Dryas heath at Finse, Norway. I wanted to analyse how warming has affected species cover and richness of lichens and vascular plants and to assess if species composition of lichens and vascular plants has changed. Furthermore, I examined the role of soil moisture and cover of the dominant dwarf shrub Dryas octopetala on species cover, species richness, and composition. To examine if species cover and species richness differed between warmed plots and control plots I used one-way analysis of covariance (ANCOVA) with soil moisture and cover of D. octopetala as covariates. To visualise community composition in relation to the warming experiment I used ordination analysis. I hypothesised that experimental warming would lead to a decrease in lichen richness and species cover, at the expense of an increase in species richness and cover of vascular plants. I found some support for the hypothesis, however, the majority of the results showed no effect of the warming manipulation. Few significant results may indicate stability in the community at Finse, and the ability to tolerate small changes in temperature. Possible explanations for stability is the influence of the dominant dwarf shrub D. octopetala and climatic conditions in Norway with a high level of precipitation that could counteract the effects of warming. submittedVersion M-NF Master Thesis Arctic Climate change Dryas octopetala Global warming Open archive Norwegian University of Life Sciences: Brage NMBU Arctic Norway |
institution |
Open Polar |
collection |
Open archive Norwegian University of Life Sciences: Brage NMBU |
op_collection_id |
ftunivmob |
language |
English |
topic |
Dryas octopetala Climate change VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
Dryas octopetala Climate change VDP::Matematikk og Naturvitenskap: 400 Hasvik, Åshild The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
topic_facet |
Dryas octopetala Climate change VDP::Matematikk og Naturvitenskap: 400 |
description |
Global warming affects species diversity and ecosystems throughout the world, and alpine and arctic plant communities are considered to be particularly sensitive. During the last decades, several studies have shown a shift in species composition and a movement of species to higher elevations. Long-term warming studies have been conducted in these areas, with the aim to better understand and predict how consequences of global warming will affect the flora in cold climate ecosystems. In this thesis, I have collected data from an on-going, 17-year-old, warming experiment in an alpine Dryas heath at Finse, Norway. I wanted to analyse how warming has affected species cover and richness of lichens and vascular plants and to assess if species composition of lichens and vascular plants has changed. Furthermore, I examined the role of soil moisture and cover of the dominant dwarf shrub Dryas octopetala on species cover, species richness, and composition. To examine if species cover and species richness differed between warmed plots and control plots I used one-way analysis of covariance (ANCOVA) with soil moisture and cover of D. octopetala as covariates. To visualise community composition in relation to the warming experiment I used ordination analysis. I hypothesised that experimental warming would lead to a decrease in lichen richness and species cover, at the expense of an increase in species richness and cover of vascular plants. I found some support for the hypothesis, however, the majority of the results showed no effect of the warming manipulation. Few significant results may indicate stability in the community at Finse, and the ability to tolerate small changes in temperature. Possible explanations for stability is the influence of the dominant dwarf shrub D. octopetala and climatic conditions in Norway with a high level of precipitation that could counteract the effects of warming. submittedVersion M-NF |
author2 |
Klanderud, Kari Asplund, Johan Roos, Ruben Erik |
format |
Master Thesis |
author |
Hasvik, Åshild |
author_facet |
Hasvik, Åshild |
author_sort |
Hasvik, Åshild |
title |
The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
title_short |
The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
title_full |
The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
title_fullStr |
The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
title_full_unstemmed |
The effect of long-term experimental warming on lichens and vascular plants in an alpine Dryas heath |
title_sort |
effect of long-term experimental warming on lichens and vascular plants in an alpine dryas heath |
publisher |
Norwegian University of Life Sciences, Ås |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2567612 |
op_coverage |
Norway |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Climate change Dryas octopetala Global warming |
genre_facet |
Arctic Climate change Dryas octopetala Global warming |
op_source |
34 |
op_relation |
http://hdl.handle.net/11250/2567612 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766346823003275264 |