The effects of long‐term experimental warming on the structure of three High Arctic plant communities
Abstract Questions Are warming trends in High Arctic tundra consistent across plant communities within a given site, or is there evidence for fine‐scale heterogeneity in the response of plant community structure to experimental warming? How has the composition, cover and canopy height of three High...
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crwiley:10.1111/jvs.12417 2024-09-15T17:36:34+00:00 The effects of long‐term experimental warming on the structure of three High Arctic plant communities Edwards, Marc Henry, Gregory H.R. Kühn, Ingolf Natural Sciences and Engineering Research Council of Canada ArcticNet Natural Resources Canada 2016 http://dx.doi.org/10.1111/jvs.12417 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjvs.12417 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jvs.12417 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Vegetation Science volume 27, issue 5, page 904-913 ISSN 1100-9233 1654-1103 journal-article 2016 crwiley https://doi.org/10.1111/jvs.12417 2024-08-27T04:28:07Z Abstract Questions Are warming trends in High Arctic tundra consistent across plant communities within a given site, or is there evidence for fine‐scale heterogeneity in the response of plant community structure to experimental warming? How has the composition, cover and canopy height of three High Arctic plant communities responded to 18 yr of experimental warming? To what extent can hand‐held remote sensing methods serve as a proxy for community structure in tundra ecosystems? Location Alexandra Fiord lowland, Ellesmere Island, Canada. Methods We experimentally warmed patches of tundra using the International Tundra Experiment ( ITEX ) open‐top chambers to simulate climate change. We measured differences in community structure after 18 yr of experimental warming in three distinct plant communities: a wet sedge meadow, a mesic evergreen shrub‐dominated community and a dry deciduous shrub‐dominated community. We measured plant cover, height and growth form composition using a point‐intercept method and investigated the use of hand‐held NDVI at the plot scale as a proxy for plant community structure. Results All three plant communities showed unique differences after long‐term experimental warming. Both the meadow and evergreen shrub communities had significant differences in community composition between control and warmed plots, but none of the communities showed differences in plant cover or height. Deciduous shrubs and bryophytes were more abundant in warmed over control plots at both the evergreen shrub and meadow communities. Warmed plots in the meadow community had fewer graminoids and lower height values. Lichen was consistently less abundant in warmed plots across all communities where it occurred. NDVI values were driven by deciduous shrubs, and graminoids and showed community‐specific correlations with plant cover. Conclusions Our results suggest community‐level resistance to warming in terms of plant cover and height, but compositional differences support the hypothesis that climate change responses ... Article in Journal/Newspaper Alexandra Fiord Climate change Ellesmere Island Tundra Wiley Online Library Journal of Vegetation Science 27 5 904 913 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Questions Are warming trends in High Arctic tundra consistent across plant communities within a given site, or is there evidence for fine‐scale heterogeneity in the response of plant community structure to experimental warming? How has the composition, cover and canopy height of three High Arctic plant communities responded to 18 yr of experimental warming? To what extent can hand‐held remote sensing methods serve as a proxy for community structure in tundra ecosystems? Location Alexandra Fiord lowland, Ellesmere Island, Canada. Methods We experimentally warmed patches of tundra using the International Tundra Experiment ( ITEX ) open‐top chambers to simulate climate change. We measured differences in community structure after 18 yr of experimental warming in three distinct plant communities: a wet sedge meadow, a mesic evergreen shrub‐dominated community and a dry deciduous shrub‐dominated community. We measured plant cover, height and growth form composition using a point‐intercept method and investigated the use of hand‐held NDVI at the plot scale as a proxy for plant community structure. Results All three plant communities showed unique differences after long‐term experimental warming. Both the meadow and evergreen shrub communities had significant differences in community composition between control and warmed plots, but none of the communities showed differences in plant cover or height. Deciduous shrubs and bryophytes were more abundant in warmed over control plots at both the evergreen shrub and meadow communities. Warmed plots in the meadow community had fewer graminoids and lower height values. Lichen was consistently less abundant in warmed plots across all communities where it occurred. NDVI values were driven by deciduous shrubs, and graminoids and showed community‐specific correlations with plant cover. Conclusions Our results suggest community‐level resistance to warming in terms of plant cover and height, but compositional differences support the hypothesis that climate change responses ... |
author2 |
Kühn, Ingolf Natural Sciences and Engineering Research Council of Canada ArcticNet Natural Resources Canada |
format |
Article in Journal/Newspaper |
author |
Edwards, Marc Henry, Gregory H.R. |
spellingShingle |
Edwards, Marc Henry, Gregory H.R. The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
author_facet |
Edwards, Marc Henry, Gregory H.R. |
author_sort |
Edwards, Marc |
title |
The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
title_short |
The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
title_full |
The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
title_fullStr |
The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
title_full_unstemmed |
The effects of long‐term experimental warming on the structure of three High Arctic plant communities |
title_sort |
effects of long‐term experimental warming on the structure of three high arctic plant communities |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jvs.12417 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjvs.12417 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jvs.12417 |
genre |
Alexandra Fiord Climate change Ellesmere Island Tundra |
genre_facet |
Alexandra Fiord Climate change Ellesmere Island Tundra |
op_source |
Journal of Vegetation Science volume 27, issue 5, page 904-913 ISSN 1100-9233 1654-1103 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jvs.12417 |
container_title |
Journal of Vegetation Science |
container_volume |
27 |
container_issue |
5 |
container_start_page |
904 |
op_container_end_page |
913 |
_version_ |
1810490226945032192 |