Aerial photo interpretation for change detection of treeline ecotones in the Swedish mountains
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منابع مشابه
Spatial patterns of plant richness across treeline ecotones in the Pyrenees reveal different locations for richness and tree cover boundaries
Aim To forecast the responses of alpine flora to the expected upward shift of treeline ecotones due to climatic warming, we investigated species richness patterns of vascular plants at small spatial scales across elevational transects. Location Richness patterns were assessed at local scales along the elevational gradient in two undisturbed treeline ecotones and one disturbed treeline ecotone i...
متن کاملAmong‐tree variability and feedback effects result in different growth responses to climate change at the upper treeline in the Swiss Alps
Upper treeline ecotones are important life form boundaries and particularly sensitive to a warming climate. Changes in growth conditions at these ecotones have wide-ranging implications for the provision of ecosystem services in densely populated mountain regions like the European Alps. We quantify climate effects on short- and long-term tree growth responses, focusing on among-tree variability...
متن کاملDevelopment of a Spatial Analysis Method Using Ground-Based Repeat Photography to Detect Changes in the Alpine Treeline Ecotone, Glacier National Park, Montana, U.S.A
Repeat photography is a powerful tool for detection of landscape change over decadal timescales. Here a novel method is presented that applies spatial analysis software to digital photo-pairs, allowing vegetation change to be categorized and quantified. This method is applied to 12 sites within the alpine treeline ecotone of Glacier National Park, Montana, and is used to examine vegetation chan...
متن کاملALPINE TREELINE OF WESTERN NORTH AMERICA: LINKING ORGANISM-TO-LANDSCAPE DY NAMlCS
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 negativ...
متن کاملMontane forest ecotones moved downslope in northeastern USA in spite of warming between 1984 and 2011.
Ecotones are transition zones that form, in forests, where distinct forest types meet across a climatic gradient. In mountains, ecotones are compressed and act as potential harbingers of species shifts that accompany climate change. As the climate warms in New England, USA, high-elevation boreal forests are expected to recede upslope, with northern hardwood species moving up behind. Yet recent ...
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