Biogenic process ; Biogeography ; Climatic change ; Conceptual model ; Ecosystem ; Ecotone ; Fauna ; Forest ; Mountain ; Tree line ; Tundra
The AA. discuss Körner's five hypotheses and explain how animal activity can be included within them to make them more applicable to treeline environments experiencing a changing climate. The AA. utilize the conceptual model proposed by Cairns
and Moen (2004) as an organizing framework for the inclusion of animal activity with existing hypotheses. Finally they suggest that the equivocal nature of treeline response to climate change may be in part related to animal activity.
Alpine treeline, climate, and environmental changes. Special issue
Amérique du Nord ; Biogéographie ; Changement climatique ; Ecosystème ; Ecotone ; Glaciation ; Géologie ; Géomorphologie ; Limite supérieure de la forêt ; Montagne ; Pléistocène ; Rocky Mountains
Biogeography ; Climatic change ; Ecosystem ; Ecotone ; Geology ; Geomorphology ; Glaciation ; Mountain ; North America ; Pleistocene ; Rocky Mountains ; Tree line
. Current fine scale processes include solifluction and changes on relict solifluction and digging by animals. These processes should be examined in detail in future studies to facilitate a better undestanding of where individual tree seedlings become
established as a primary response of the ecotone to climate change.
Alpine treeline, climate, and environmental changes. Special issue
Action biogène ; Amérique du Nord ; Changement climatique ; Dynamique de la végétation ; Dégradation de la végétation ; Ecosystème ; Forêt ; Limite supérieure de la forêt ; Montagne ; Pin ; Rocky Mountains
Biogenic process ; Climatic change ; Ecosystem ; Forest ; Mountain ; North America ; Pine ; Rocky Mountains ; Tree line ; Vegetation degradation ; Vegetation dynamics
The AA. discuss the cascading ecological effects of the loss of treeline whitebark pine and expected changes in landscape vegetation patterns. Potential implications of the loss of whitebark pine for northwestern Montana treelines are examined
in the context of climate change within a conceptual model. The AA. speculate that exotic pathogens could potentially confound predictions of treeline responses to global warming in many geographic regions.