GEOG 3110 Lecture Notes - Lecture 16: Abies Lasiocarpa, Pinus Albicaulis, Negative Relationship
17 Feb 2016
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Document Summary
Current forests and past forests are unique (no-analogue) climate change can affect treelines differently (even within the same region) Most ecology textbooks define communities as being composed of: Species that distribute themselves over ecological gradients of conditions independently of the distributions of other species . Ecosystems: total interconnectedness a unified group of components forming a systematized whole. Relationships between different species that result better [fitness] for at least one species involved positive interactions vary depending on the context under which they occur. (2009) The common occurrence of positive interactions suggests that plant species may not always. The relative importance of these interactions can vary along gradients. interacting in strong evolutionary ways particularly in stressful habitats. Ex. competition/ facilitations between subalpine fir (abies lasiocarpa) and whitebark pine. At low elevations, the species are anti-correlated due to competition. At high elevations, whitebark pine modifies microclimate to facilitate establishment of subalpine fir.
