Warming-induced upslope advance of subalpine forest is severely limited by geomorphic processes

Warming-induced upslope advance of subalpine forest is severely limited by geomorphic processes

Forests are expected to expand into alpine areas because of climate warming, causing land-cover change and fragmentation of alpine habitats. However, this expansion will only occur if the present upper treeline is limited by low-growing season temperatures that...

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Veröffentlicht in:Proceedings of the National Academy of Sciences of the United States of America. - National Academy of Sciences. - 110(2013), 20, Seite 8117-8122
1. Verfasser: Macias-Fauria, Marc (VerfasserIn)
Weitere Verfasser: Johnson, Edward A.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Proceedings of the National Academy of Sciences of the United States of America
Schlagworte:Environmental studies Biological sciences Physical sciences
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520 |a Forests are expected to expand into alpine areas because of climate warming, causing land-cover change and fragmentation of alpine habitats. However, this expansion will only occur if the present upper treeline is limited by low-growing season temperatures that reduce plant growth. This temperature limitation has not been quantified at a landscape scale. Here, we show that temperature alone cannot realistically explain high-elevation tree cover over a >100-km² area in the Canadian Rockies and that geologic/geomorphic processes are fundamental to understanding the heterogeneous landscape distribution of trees. Furthermore, upslope tree advance in a warmer scenario will be severely limited by availability of sites with adequate geomorphic/topographic characteristics. Our results imply that landscape-to-regional scale projections of warming-induced, high-elevation forest advance into alpine areas should not be based solely on temperature-sensitive, site-specific upper-treeline studies but also on geomorphic processes that control tree occurrence at long (centuries/millennia) timescales. 
540 |a copyright © 1993-2008 National Academy of Sciences of the United States of America 
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650 4 |a Environmental studies  |x Atmospheric sciences  |x Climatology 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Topography  |x Sloping terrain 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Dendrology  |x Trees  |x Street trees 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Topography  |x Topographical elevation 
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700 1 |a Johnson, Edward A.  |e verfasserin  |4 aut 
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