Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada.

Isla Myers-Smith, David Hik, Catherine Kennedy, Dorothy Cooley, Jill Johnstone, Alice Kenney, Charles KREBS

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Canopy-forming shrubs are reported to be increasing at sites around the circumpolar Arctic. Our results indicate expansion in canopy cover and height of willows on Herschel Island located at 70 degrees north on the western Arctic coast of the Yukon Territory. We examined historic photographs, repeated vegetation surveys, and conducted monitoring of long-term plots and found evidence of increases of each of the dominant canopy-forming willow species (Salix richardsonii, Salix glauca and Salix pulchra), during the twentieth century. A simple model of patch initiation indicates that the majority of willow patches for each of these species became established between 1910 and 1960, with stem ages and maximum growth rates indicating that some patches could have established as late as the 1980s. Collectively, these results suggest that willow species are increasing in canopy cover and height on Herschel Island. We did not find evidence that expansion of willow patches is currently limited by herbivory, disease, or growing conditions.
Original languageEnglish
Pages (from-to)610-623
Number of pages14
JournalAmbio
Volume40
Issue number6
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

Yukon Territory
Salix
Arctic
Islands
twentieth century
Canada
canopy
evidence
monitoring
Disease
herbivory
photograph
shrub
stem
Herbivory
vegetation
coast
Coastal zones

Cite this

Myers-Smith, I., Hik, D., Kennedy, C., Cooley, D., Johnstone, J., Kenney, A., & KREBS, C. (2011). Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada. Ambio, 40(6), 610-623. https://doi.org/10.1007/s13280-011-0168-y
Myers-Smith, Isla ; Hik, David ; Kennedy, Catherine ; Cooley, Dorothy ; Johnstone, Jill ; Kenney, Alice ; KREBS, Charles. / Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada. In: Ambio. 2011 ; Vol. 40, No. 6. pp. 610-623.
@article{b550fa0fd6cb4482991f9bd9906ad369,
title = "Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada.",
abstract = "Canopy-forming shrubs are reported to be increasing at sites around the circumpolar Arctic. Our results indicate expansion in canopy cover and height of willows on Herschel Island located at 70 degrees north on the western Arctic coast of the Yukon Territory. We examined historic photographs, repeated vegetation surveys, and conducted monitoring of long-term plots and found evidence of increases of each of the dominant canopy-forming willow species (Salix richardsonii, Salix glauca and Salix pulchra), during the twentieth century. A simple model of patch initiation indicates that the majority of willow patches for each of these species became established between 1910 and 1960, with stem ages and maximum growth rates indicating that some patches could have established as late as the 1980s. Collectively, these results suggest that willow species are increasing in canopy cover and height on Herschel Island. We did not find evidence that expansion of willow patches is currently limited by herbivory, disease, or growing conditions.",
keywords = "Arctic, Tundra, Climate change, Willows (Salix spp.), Shrub encroachment, Yukon",
author = "Isla Myers-Smith and David Hik and Catherine Kennedy and Dorothy Cooley and Jill Johnstone and Alice Kenney and Charles KREBS",
year = "2011",
doi = "10.1007/s13280-011-0168-y",
language = "English",
volume = "40",
pages = "610--623",
journal = "Ambio",
issn = "0044-7447",
publisher = "Allen Press Inc.",
number = "6",

}

Myers-Smith, I, Hik, D, Kennedy, C, Cooley, D, Johnstone, J, Kenney, A & KREBS, C 2011, 'Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada.', Ambio, vol. 40, no. 6, pp. 610-623. https://doi.org/10.1007/s13280-011-0168-y

Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada. / Myers-Smith, Isla; Hik, David; Kennedy, Catherine; Cooley, Dorothy; Johnstone, Jill; Kenney, Alice; KREBS, Charles.

In: Ambio, Vol. 40, No. 6, 2011, p. 610-623.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Expansion of canopy-forming willows over the twentieth century on Herschel Island, Yukon Territory, Canada.

AU - Myers-Smith, Isla

AU - Hik, David

AU - Kennedy, Catherine

AU - Cooley, Dorothy

AU - Johnstone, Jill

AU - Kenney, Alice

AU - KREBS, Charles

PY - 2011

Y1 - 2011

N2 - Canopy-forming shrubs are reported to be increasing at sites around the circumpolar Arctic. Our results indicate expansion in canopy cover and height of willows on Herschel Island located at 70 degrees north on the western Arctic coast of the Yukon Territory. We examined historic photographs, repeated vegetation surveys, and conducted monitoring of long-term plots and found evidence of increases of each of the dominant canopy-forming willow species (Salix richardsonii, Salix glauca and Salix pulchra), during the twentieth century. A simple model of patch initiation indicates that the majority of willow patches for each of these species became established between 1910 and 1960, with stem ages and maximum growth rates indicating that some patches could have established as late as the 1980s. Collectively, these results suggest that willow species are increasing in canopy cover and height on Herschel Island. We did not find evidence that expansion of willow patches is currently limited by herbivory, disease, or growing conditions.

AB - Canopy-forming shrubs are reported to be increasing at sites around the circumpolar Arctic. Our results indicate expansion in canopy cover and height of willows on Herschel Island located at 70 degrees north on the western Arctic coast of the Yukon Territory. We examined historic photographs, repeated vegetation surveys, and conducted monitoring of long-term plots and found evidence of increases of each of the dominant canopy-forming willow species (Salix richardsonii, Salix glauca and Salix pulchra), during the twentieth century. A simple model of patch initiation indicates that the majority of willow patches for each of these species became established between 1910 and 1960, with stem ages and maximum growth rates indicating that some patches could have established as late as the 1980s. Collectively, these results suggest that willow species are increasing in canopy cover and height on Herschel Island. We did not find evidence that expansion of willow patches is currently limited by herbivory, disease, or growing conditions.

KW - Arctic

KW - Tundra

KW - Climate change

KW - Willows (Salix spp.)

KW - Shrub encroachment

KW - Yukon

U2 - 10.1007/s13280-011-0168-y

DO - 10.1007/s13280-011-0168-y

M3 - Article

VL - 40

SP - 610

EP - 623

JO - Ambio

JF - Ambio

SN - 0044-7447

IS - 6

ER -