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 m × 1 m contiguous quadrats along two ∼450 m transects ac...
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Canadian Science Publishing
2018
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Online Access: | https://doi.org/10.1139/as-2017-0028 https://doaj.org/article/c9ceb7612d7a40718a46c4693840414c |
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ftdoajarticles:oai:doaj.org/article:c9ceb7612d7a40718a46c4693840414c 2023-05-15T14:23:38+02:00 Patterns of shrub abundance and relationships with other plant types within the forest–tundra ecotone in northern Canada Karen A. Harper Amanda A. Lavallee Pavel Dodonov 2018-12-01T00:00:00Z https://doi.org/10.1139/as-2017-0028 https://doaj.org/article/c9ceb7612d7a40718a46c4693840414c EN FR eng fre Canadian Science Publishing https://doi.org/10.1139/as-2017-0028 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0028 2368-7460 https://doaj.org/article/c9ceb7612d7a40718a46c4693840414c Arctic Science, Vol 4, Iss 4, Pp 691-709 (2018) forest–tundra ecotone heterogeneous landscapes shrub expansion spatial pattern wavelet analysis Environmental sciences GE1-350 Environmental engineering TA170-171 article 2018 ftdoajarticles https://doi.org/10.1139/as-2017-0028 2022-12-31T06:34:54Z 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 m × 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 in the tundra, the spatial pattern of shrubs will become more complex at a variety of scales, likely with cascading effects on other plant types. Article in Journal/Newspaper Arctic Tundra Directory of Open Access Journals: DOAJ Articles Canada Arctic Science 4 4 691 709 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
forest–tundra ecotone heterogeneous landscapes shrub expansion spatial pattern wavelet analysis Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
forest–tundra ecotone heterogeneous landscapes shrub expansion spatial pattern wavelet analysis Environmental sciences GE1-350 Environmental engineering TA170-171 Karen A. Harper Amanda A. Lavallee Pavel Dodonov Patterns of shrub abundance and relationships with other plant types within the forest–tundra ecotone in northern Canada |
topic_facet |
forest–tundra ecotone heterogeneous landscapes shrub expansion spatial pattern wavelet analysis Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
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 m × 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 in the tundra, the spatial pattern of shrubs will become more complex at a variety of scales, likely with cascading effects on other plant types. |
format |
Article in Journal/Newspaper |
author |
Karen A. Harper Amanda A. Lavallee Pavel Dodonov |
author_facet |
Karen A. Harper Amanda A. Lavallee Pavel Dodonov |
author_sort |
Karen A. Harper |
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 |
Canadian Science Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1139/as-2017-0028 https://doaj.org/article/c9ceb7612d7a40718a46c4693840414c |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
Arctic Science, Vol 4, Iss 4, Pp 691-709 (2018) |
op_relation |
https://doi.org/10.1139/as-2017-0028 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0028 2368-7460 https://doaj.org/article/c9ceb7612d7a40718a46c4693840414c |
op_doi |
https://doi.org/10.1139/as-2017-0028 |
container_title |
Arctic Science |
container_volume |
4 |
container_issue |
4 |
container_start_page |
691 |
op_container_end_page |
709 |
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1766296138295541760 |