The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis
Abstract When tree seedlings establish beyond the current tree line due to climate warming, they encounter existing vegetation, such as bryophytes that often dominate in arctic and alpine tundra. The stress gradient hypothesis ( SGH ) predicts that plant interactions in tundra become increasingly ne...
Published in: | Journal of Ecology |
---|---|
Main Authors: | , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/1365-2745.12898 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2745.12898 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12898 |
id |
crwiley:10.1111/1365-2745.12898 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/1365-2745.12898 2024-05-19T07:36:50+00:00 The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis Lett, Signe Wardle, David A. Nilsson, Marie‐Charlotte Teuber, Laurenz M. Dorrepaal, Ellen Chen, Han Kempestiftelserna Vetenskapsrådet 2017 http://dx.doi.org/10.1111/1365-2745.12898 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2745.12898 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12898 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Ecology volume 106, issue 3, page 1142-1155 ISSN 0022-0477 1365-2745 Plant Science Ecology Ecology, Evolution, Behavior and Systematics journal-article 2017 crwiley https://doi.org/10.1111/1365-2745.12898 2024-04-22T07:36:17Z Abstract When tree seedlings establish beyond the current tree line due to climate warming, they encounter existing vegetation, such as bryophytes that often dominate in arctic and alpine tundra. The stress gradient hypothesis ( SGH ) predicts that plant interactions in tundra become increasingly negative as climate warms and conditions become less harsh. However, for seedlings, climate warming might not result in lower winter stress, if insulating snow cover is reduced. We aimed to understand if bryophytes facilitate seedling survival in a changing winter climate and if these effects of bryophytes on tree seedlings comply with the SGH along elevational gradients under contrasting snow conditions. In the Swedish subarctic, we transplanted intact bryophyte cores covered by each of three bryophyte species and bryophyte‐free control soil from above the tree line to two field common garden sites, representing current and future tree line air temperature conditions (i.e. current tree line elevation and a lower, warmer, elevation below the tree line). We planted seedlings of Betula pubescens and Pinus sylvestris into these cores and subjected them to experimental manipulation of snow cover during one winter. In agreement with the SGH , milder conditions caused by increased snow cover enhanced the generally negative or neutral effects of bryophytes on seedlings immediately after winter. Furthermore, survival of P. sylvestris seedlings after one full year was higher at lower elevation, especially when snow cover was thinner. However, in contrast with the SGH , impacts of bryophytes on over‐winter survival of seedlings did not differ between elevations, and impacts on survival of B. pubescens seedlings after 1 year was more negative at lower elevation. Bryophyte species differed in their effect on seedling survival after winter, but these differences were not related to their insulating capacity. Synthesis . Our study demonstrates that interactions from bryophytes can modify the impacts of winter climate change on tree ... Article in Journal/Newspaper Arctic Climate change Subarctic Tundra Wiley Online Library Journal of Ecology 106 3 1142 1155 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics Lett, Signe Wardle, David A. Nilsson, Marie‐Charlotte Teuber, Laurenz M. Dorrepaal, Ellen The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
topic_facet |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract When tree seedlings establish beyond the current tree line due to climate warming, they encounter existing vegetation, such as bryophytes that often dominate in arctic and alpine tundra. The stress gradient hypothesis ( SGH ) predicts that plant interactions in tundra become increasingly negative as climate warms and conditions become less harsh. However, for seedlings, climate warming might not result in lower winter stress, if insulating snow cover is reduced. We aimed to understand if bryophytes facilitate seedling survival in a changing winter climate and if these effects of bryophytes on tree seedlings comply with the SGH along elevational gradients under contrasting snow conditions. In the Swedish subarctic, we transplanted intact bryophyte cores covered by each of three bryophyte species and bryophyte‐free control soil from above the tree line to two field common garden sites, representing current and future tree line air temperature conditions (i.e. current tree line elevation and a lower, warmer, elevation below the tree line). We planted seedlings of Betula pubescens and Pinus sylvestris into these cores and subjected them to experimental manipulation of snow cover during one winter. In agreement with the SGH , milder conditions caused by increased snow cover enhanced the generally negative or neutral effects of bryophytes on seedlings immediately after winter. Furthermore, survival of P. sylvestris seedlings after one full year was higher at lower elevation, especially when snow cover was thinner. However, in contrast with the SGH , impacts of bryophytes on over‐winter survival of seedlings did not differ between elevations, and impacts on survival of B. pubescens seedlings after 1 year was more negative at lower elevation. Bryophyte species differed in their effect on seedling survival after winter, but these differences were not related to their insulating capacity. Synthesis . Our study demonstrates that interactions from bryophytes can modify the impacts of winter climate change on tree ... |
author2 |
Chen, Han Kempestiftelserna Vetenskapsrådet |
format |
Article in Journal/Newspaper |
author |
Lett, Signe Wardle, David A. Nilsson, Marie‐Charlotte Teuber, Laurenz M. Dorrepaal, Ellen |
author_facet |
Lett, Signe Wardle, David A. Nilsson, Marie‐Charlotte Teuber, Laurenz M. Dorrepaal, Ellen |
author_sort |
Lett, Signe |
title |
The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
title_short |
The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
title_full |
The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
title_fullStr |
The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
title_full_unstemmed |
The role of bryophytes for tree seedling responses to winter climate change: Implications for the stress gradient hypothesis |
title_sort |
role of bryophytes for tree seedling responses to winter climate change: implications for the stress gradient hypothesis |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/1365-2745.12898 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2745.12898 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12898 |
genre |
Arctic Climate change Subarctic Tundra |
genre_facet |
Arctic Climate change Subarctic Tundra |
op_source |
Journal of Ecology volume 106, issue 3, page 1142-1155 ISSN 0022-0477 1365-2745 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2745.12898 |
container_title |
Journal of Ecology |
container_volume |
106 |
container_issue |
3 |
container_start_page |
1142 |
op_container_end_page |
1155 |
_version_ |
1799475977202434048 |