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Impacts of different climate change regimes and extreme climatic events on an alpine meadow community
Climate variability is expected to increase in future but there exist very few experimental studies that apply different warming regimes on plant communities over several years. We studied an alpine meadow community under three warming regimes over three years. Treatments consisted of (a) a constant...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4757884/ https://www.ncbi.nlm.nih.gov/pubmed/26888225 http://dx.doi.org/10.1038/srep21720 |
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author | Alatalo, Juha M. Jägerbrand, Annika K. Molau, Ulf |
author_facet | Alatalo, Juha M. Jägerbrand, Annika K. Molau, Ulf |
author_sort | Alatalo, Juha M. |
collection | PubMed |
description | Climate variability is expected to increase in future but there exist very few experimental studies that apply different warming regimes on plant communities over several years. We studied an alpine meadow community under three warming regimes over three years. Treatments consisted of (a) a constant level of warming with open-top chambers (ca. 1.9 °C above ambient), (b) yearly stepwise increases in warming (increases of ca. 1.0, 1.9 and 3.5 °C), and (c) pulse warming, a single first-year pulse event of warming (increase of ca. 3.5 °C). Pulse warming and stepwise warming was hypothesised to cause distinct first-year and third-year effects, respectively. We found support for both hypotheses; however, the responses varied among measurement levels (whole community, canopy, bottom layer, and plant functional groups), treatments, and time. Our study revealed complex responses of the alpine plant community to the different experimentally imposed climate warming regimes. Plant cover, height and biomass frequently responded distinctly to the constant level of warming, the stepwise increase in warming and the extreme pulse-warming event. Notably, we found that stepwise warming had an accumulating effect on biomass, the responses to the different warming regimes varied among functional groups, and the short-term perturbations had negative effect on species richness and diversity |
format | Online Article Text |
id | pubmed-4757884 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47578842016-02-26 Impacts of different climate change regimes and extreme climatic events on an alpine meadow community Alatalo, Juha M. Jägerbrand, Annika K. Molau, Ulf Sci Rep Article Climate variability is expected to increase in future but there exist very few experimental studies that apply different warming regimes on plant communities over several years. We studied an alpine meadow community under three warming regimes over three years. Treatments consisted of (a) a constant level of warming with open-top chambers (ca. 1.9 °C above ambient), (b) yearly stepwise increases in warming (increases of ca. 1.0, 1.9 and 3.5 °C), and (c) pulse warming, a single first-year pulse event of warming (increase of ca. 3.5 °C). Pulse warming and stepwise warming was hypothesised to cause distinct first-year and third-year effects, respectively. We found support for both hypotheses; however, the responses varied among measurement levels (whole community, canopy, bottom layer, and plant functional groups), treatments, and time. Our study revealed complex responses of the alpine plant community to the different experimentally imposed climate warming regimes. Plant cover, height and biomass frequently responded distinctly to the constant level of warming, the stepwise increase in warming and the extreme pulse-warming event. Notably, we found that stepwise warming had an accumulating effect on biomass, the responses to the different warming regimes varied among functional groups, and the short-term perturbations had negative effect on species richness and diversity Nature Publishing Group 2016-02-18 /pmc/articles/PMC4757884/ /pubmed/26888225 http://dx.doi.org/10.1038/srep21720 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Alatalo, Juha M. Jägerbrand, Annika K. Molau, Ulf Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title | Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title_full | Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title_fullStr | Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title_full_unstemmed | Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title_short | Impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
title_sort | impacts of different climate change regimes and extreme climatic events on an alpine meadow community |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4757884/ https://www.ncbi.nlm.nih.gov/pubmed/26888225 http://dx.doi.org/10.1038/srep21720 |
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