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Title: Alpine treeline of western North America: Linking organism-to-landscape dynamics

Author: Malanson, George P.; Butler, David R.; Fagre, Daniel B.; Walsh, Stephen J.; Tomback, Diana F.; Daniels, Lori D.; Resler, Lynn M.; Smith, William K.; Weiss, Daniel J.; Peterson, David L.; Bunn, Andrew C.; Hiemstra, Christopher A.; Liptzin, Daniel; Bourgeron, Patrick S.; Shen, Zehao; Millar, Constance I.

Date: 2007

Source: Physical Geography 28(5): 378-397

Publication Series: Not categorized

Description: Although the ecological dynamics of the alpine treeline ecotone are influenced by climate, it is an imperfect indicator of climate change. Mechanistic processes that shape the ecotone-seed rain, seed germination, seedling establishment and subsequent tree growth form, or, conversely tree dieback-depend on microsite patterns. Growth forms affect wind and snow, and so develop positive and negative feedback loops that create these microsites. As a result, complex landscape patterns are generated at rnultiple spatial scales. Although these mechanistic processes are fundamentally the same for all forest-tundra ecotones across western North America, factors such as prior climate, underlying geology and geomorphology, and genetic constraints of dominant tree species lead to geographic differences in the responses of particular ecotones to climate change.

Keywords: climate change, ecotone, establishment, geomorphology, landscape, scale

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Malanson, George P.; Butler, David R.; Fagre, Daniel B.; Walsh, Stephen J.; Tomback, Diana F.; Daniels, Lori D.; Resler, Lynn M.; Smith, William K.; Weiss, Daniel J.; Peterson, David L.; Bunn, Andrew C.; Hiemstra, Christopher A.; Liptzin, Daniel; Bourgeron, Patrick S.; Shen, Zehao; Millar, Constance I. 2007. Alpine treeline of western North America: Linking organism-to-landscape dynamics. Physical Geography 28(5): 378-397

 


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