Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen
Abstract Main conclusion: Evergreen plants are more vulnerable than grasses and birch to snow and temperature variability in the sub-Arctic. Most Arctic climate impact studies focus on single factors, such as summer warming, while ecosystems are exposed to changes in all seasons. Through a combinati...
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ftunivoulu:oai:oulu.fi:nbnfi-fe201803094632 2023-07-30T04:01:00+02:00 Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen Bokhorst, S. (Stef) Jaakola, L. (Laura) Karppinen, K. (Katja) Edvinsen, G. K. (Guro K.) Mæhre, H. K. (Hanne K.) Bjerke, J. W. (Jarle W.) 2018 application/pdf http://urn.fi/urn:nbn:fi-fe201803094632 eng eng Springer Nature info:eu-repo/semantics/altIdentifier/pissn/0032-0935 info:eu-repo/semantics/altIdentifier/eissn/1432-2048 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00425-017-2813-6 info:eu-repo/semantics/openAccess © The Author(s) 2017. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. https://creativecommons.org/licenses/by/4.0/ C-repeat binding factor Fatty acids Frost Grass Multiple stresses Shrub Snow info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivoulu https://doi.org/10.1007/s00425-017-2813-6 2023-07-08T19:53:52Z Abstract Main conclusion: Evergreen plants are more vulnerable than grasses and birch to snow and temperature variability in the sub-Arctic. Most Arctic climate impact studies focus on single factors, such as summer warming, while ecosystems are exposed to changes in all seasons. Through a combination of field and laboratory manipulations, we compared physiological and growth responses of dominant sub-Arctic plant types to midwinter warming events (6 °C for 7 days) in combination with freezing, simulated snow thaw and nitrogen additions. We aimed to identify if different plant types showed consistent physiological, cellular, growth and mortality responses to these abiotic stressors. Evergreen dwarf shrubs and tree seedlings showed higher mortality (40–100%) following extreme winter warming events than Betula pubescens tree seedlings and grasses (0–27%). All species had growth reductions following exposure to − 20 °C, but not all species suffered from − 10 °C irrespective of other treatments. Winter warming followed by − 20 °C resulted in the greatest mortality and was strongest among evergreen plants. Snow removal reduced the biomass for most species and this was exacerbated by subsequent freezing. Nitrogen increased the growth of B. pubescens and grasses, but not the evergreens, and interaction effects with the warming, freezing and snow treatments were minor and few. Physiological activity during the winter warming and freezing treatments was inconsistent with growth and mortality rates across the plants types. However, changes in the membrane fatty acids were associated with reduced mortality of grasses. Sub-Arctic plant communities may become dominated by grasses and deciduous plants if winter snowpack diminishes and plants are exposed to greater temperature variability in the near future. Article in Journal/Newspaper Arctic Jultika - University of Oulu repository Arctic Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Planta 247 3 635 648 |
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Open Polar |
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Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
topic |
C-repeat binding factor Fatty acids Frost Grass Multiple stresses Shrub Snow |
spellingShingle |
C-repeat binding factor Fatty acids Frost Grass Multiple stresses Shrub Snow Bokhorst, S. (Stef) Jaakola, L. (Laura) Karppinen, K. (Katja) Edvinsen, G. K. (Guro K.) Mæhre, H. K. (Hanne K.) Bjerke, J. W. (Jarle W.) Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
topic_facet |
C-repeat binding factor Fatty acids Frost Grass Multiple stresses Shrub Snow |
description |
Abstract Main conclusion: Evergreen plants are more vulnerable than grasses and birch to snow and temperature variability in the sub-Arctic. Most Arctic climate impact studies focus on single factors, such as summer warming, while ecosystems are exposed to changes in all seasons. Through a combination of field and laboratory manipulations, we compared physiological and growth responses of dominant sub-Arctic plant types to midwinter warming events (6 °C for 7 days) in combination with freezing, simulated snow thaw and nitrogen additions. We aimed to identify if different plant types showed consistent physiological, cellular, growth and mortality responses to these abiotic stressors. Evergreen dwarf shrubs and tree seedlings showed higher mortality (40–100%) following extreme winter warming events than Betula pubescens tree seedlings and grasses (0–27%). All species had growth reductions following exposure to − 20 °C, but not all species suffered from − 10 °C irrespective of other treatments. Winter warming followed by − 20 °C resulted in the greatest mortality and was strongest among evergreen plants. Snow removal reduced the biomass for most species and this was exacerbated by subsequent freezing. Nitrogen increased the growth of B. pubescens and grasses, but not the evergreens, and interaction effects with the warming, freezing and snow treatments were minor and few. Physiological activity during the winter warming and freezing treatments was inconsistent with growth and mortality rates across the plants types. However, changes in the membrane fatty acids were associated with reduced mortality of grasses. Sub-Arctic plant communities may become dominated by grasses and deciduous plants if winter snowpack diminishes and plants are exposed to greater temperature variability in the near future. |
format |
Article in Journal/Newspaper |
author |
Bokhorst, S. (Stef) Jaakola, L. (Laura) Karppinen, K. (Katja) Edvinsen, G. K. (Guro K.) Mæhre, H. K. (Hanne K.) Bjerke, J. W. (Jarle W.) |
author_facet |
Bokhorst, S. (Stef) Jaakola, L. (Laura) Karppinen, K. (Katja) Edvinsen, G. K. (Guro K.) Mæhre, H. K. (Hanne K.) Bjerke, J. W. (Jarle W.) |
author_sort |
Bokhorst, S. (Stef) |
title |
Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
title_short |
Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
title_full |
Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
title_fullStr |
Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
title_full_unstemmed |
Contrasting survival and physiological responses of sub‑Arctic plant types to extreme winter warming and nitrogen |
title_sort |
contrasting survival and physiological responses of sub‑arctic plant types to extreme winter warming and nitrogen |
publisher |
Springer Nature |
publishDate |
2018 |
url |
http://urn.fi/urn:nbn:fi-fe201803094632 |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Arctic Midwinter |
geographic_facet |
Arctic Midwinter |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
info:eu-repo/semantics/altIdentifier/pissn/0032-0935 info:eu-repo/semantics/altIdentifier/eissn/1432-2048 info:eu-repo/semantics/altIdentifier/doi/10.1007/s00425-017-2813-6 |
op_rights |
info:eu-repo/semantics/openAccess © The Author(s) 2017. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1007/s00425-017-2813-6 |
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Planta |
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247 |
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3 |
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635 |
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648 |
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1772811710987501568 |