GEOG 311 Lecture Notes - Lecture 6: Eastern Gray Squirrel, Urban Heat Island, Human Ecosystem
Document Summary
Succession: change and abundance through time, usually after a disturbance, which removes all of the vegetation which leaves a surface (usually just soil) In an urban environment, the abandonment of a parking lot, could become a site of succession. The ecological principles remain the same in non-urban systems. In order for organisms to survive, they need sustainable levels of water, nutrients (food), light, warmth, space. Each organism has a range of tolerance for these factors and does best where there is an optimum set of conditions. Ecological principles are dependent on eco-physiology --> e. g. the case study of climatic stresses depend on clustering. One would need to know how much water trees would need, in order to perform those functions. In trees that are placed densely together, they use less water. Per tree, in comparison to trees that are placed sparsely away from each other. The reason that the densely placed trees have more shade and.
