Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada
Throughout the forest-tundra ecotone where trees and tall shrubs are becoming more abundant, knowledge of associations between shrubs and surrounding vegetation could inform predictions of their changing relationships. We assessed shrubs in 1 x 1 m contiguous quadrats along two ~450 m transects acro...
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ftunivtoronto:oai:localhost:1807/90580 2023-05-15T18:39:40+02:00 Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada Harper, Karen Lavallée, Amanda Dodonov, Pavel 2018-06-13 http://hdl.handle.net/1807/90580 http://www.nrcresearchpress.com/doi/abs/10.1139/AS-2017-0028 unknown NRC Research Press (a division of Canadian Science Publishing) N http://hdl.handle.net/1807/90580 http://www.nrcresearchpress.com/doi/abs/10.1139/AS-2017-0028 Article 2018 ftunivtoronto 2020-06-17T12:20:10Z Throughout the forest-tundra ecotone where trees and tall shrubs are becoming more abundant, knowledge of associations between shrubs and surrounding vegetation could inform predictions of their changing relationships. We assessed shrubs in 1 x 1 m contiguous quadrats along two ~450 m transects across tundra and ecotone landscapes near Churchill, Canada to determine patterns in relation to lakeshore edges, soil pH, microtopography, and other plant groups. We used wavelet analysis to assess patterns and generalized least squares for relationships with environmental variables. Shrubs were taller and more diverse at edges, particularly in tundra. The ecotone was more complex than tundra with greater variation in tall shrub and tree cover, shrub height, and microtopography. Shrub richness was positively correlated with microtopography but exhibited no relationship with pH. Bivariate relationships of shrubs with other plant groups varied for different scales. In tundra, shrub richness was negatively correlated with graminoids, forbs, and moss, but positively correlated with lichens within 1 m; opposite relationships were found at 4-60 m scales. Relationships in the ecotone were reversed and more complex at different scales. As trees encroach into the tundra, the spatial pattern of shrubs will become more complex at a variety of scales, likely with cascading effects on other plant types. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. Article in Journal/Newspaper Tundra University of Toronto: Research Repository T-Space Canada |
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University of Toronto: Research Repository T-Space |
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ftunivtoronto |
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Throughout the forest-tundra ecotone where trees and tall shrubs are becoming more abundant, knowledge of associations between shrubs and surrounding vegetation could inform predictions of their changing relationships. We assessed shrubs in 1 x 1 m contiguous quadrats along two ~450 m transects across tundra and ecotone landscapes near Churchill, Canada to determine patterns in relation to lakeshore edges, soil pH, microtopography, and other plant groups. We used wavelet analysis to assess patterns and generalized least squares for relationships with environmental variables. Shrubs were taller and more diverse at edges, particularly in tundra. The ecotone was more complex than tundra with greater variation in tall shrub and tree cover, shrub height, and microtopography. Shrub richness was positively correlated with microtopography but exhibited no relationship with pH. Bivariate relationships of shrubs with other plant groups varied for different scales. In tundra, shrub richness was negatively correlated with graminoids, forbs, and moss, but positively correlated with lichens within 1 m; opposite relationships were found at 4-60 m scales. Relationships in the ecotone were reversed and more complex at different scales. As trees encroach into the tundra, the spatial pattern of shrubs will become more complex at a variety of scales, likely with cascading effects on other plant types. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. |
format |
Article in Journal/Newspaper |
author |
Harper, Karen Lavallée, Amanda Dodonov, Pavel |
spellingShingle |
Harper, Karen Lavallée, Amanda Dodonov, Pavel Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
author_facet |
Harper, Karen Lavallée, Amanda Dodonov, Pavel |
author_sort |
Harper, Karen |
title |
Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
title_short |
Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
title_full |
Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
title_fullStr |
Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
title_full_unstemmed |
Patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern Canada |
title_sort |
patterns of shrub abundance and relationships with other plant types within the forest-tundra ecotone in northern canada |
publisher |
NRC Research Press (a division of Canadian Science Publishing) |
publishDate |
2018 |
url |
http://hdl.handle.net/1807/90580 http://www.nrcresearchpress.com/doi/abs/10.1139/AS-2017-0028 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
N http://hdl.handle.net/1807/90580 http://www.nrcresearchpress.com/doi/abs/10.1139/AS-2017-0028 |
_version_ |
1766228619680546816 |