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| | Spatial Changes in Alpine Treeline Patterns, Glacier National Park, Montana |
 | | Vegetation types were assigned through an unsupervised classification as tree (krummholz, patch forest, or continuous canopy), moist or shrubby meadow, dry meadow, rock, or water (derived from the alpine classification developed by Habeck, 1970), and based on reflectance and spatial patterns. |
 | | Changes in patch forest and krummholz attributable to the presence of a trail were identified by pairing the area within 100-m of a segment of trail with a nearby region of identical size and shape. |
 | | Growth and establishment of krummholz and patch forest are correlated with soil moisture, while annual variability of soil moisture is primarily dependent upon precipitation and summer temperatures. |
| www.nrmsc.usgs.gov /research/treeline_rsrch.htm (1925 words) |
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