Mount Washington

Ecological Zones: A Hike Up Mount Washington

Spatial Factors Affect Primary Succession on the Muddy River Lahar, Mount St. Helens, Washington

We surveyed vegetation 28 summers after the 1980 eruption of Mount St. Helens, Washington spawned a massive lahar. Our goals were to describe vegetation patterns early in primary succession; determine factors associated with these patterns; and seek evidence for assembly rules. We determined species composition, plot position and surface features in 151 plots. Multiple regression, redundancy an...

Colonization genetics of an animal-dispersed plant (Vaccinium membranaceum) at Mount St Helens, Washington.

Population founding and spatial spread may profoundly influence later population genetic structure, but their effects are difficult to quantify when population history is unknown. We examined the genetic effects of founder group formation in a recently founded population of the animal-dispersed Vaccinium membranaceum (black huckleberry) on new volcanic deposits at Mount St Helens (Washington, U...

Vegetation patterns 25 years after the eruption of Mount St. Helens, Washington, USA.

In 2004, we surveyed the vegetation on Mount St. Helens to document changes since 1992. We asked how communities differentiate and if they develop predictable relationships with local environments. We sought evidence from links between species and environment and changes in community structure in 271 250-m(2) plots. The habitats of the seven community types (CTs) overlapped broadly. Ordination ...

Tertiary Low-angle Faulting and Related Gold and Copper Mineralization on Mount Washington, Vancouver Island

The structural style of Vancouver Island, ar perceived by thr author in the course of reconni!issance mapping for the Geological Survey of Canada. 1963 to 1981. was one of rather rigid tilted blocks. separated by numerous high-angle faults. That concept has now been shown to be incomplete and in need of revision. Firstly. deep seismic soundings carried out in I984 under the LITHOPROBE program. ...