Biology 2483A Chapter 17: Change in Communities
15 Dec 2017
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Lecture 16 change in communities (cid:120) communities seem static/stable in one place, which is what happens in our own time scale of observation ie, forests. But really, that"s not a feature of communities. Others were in burrows, or under ice-covered lakes, or were plants with underground parts (gofers). (cid:131) gophers survived in their tunnels. Neither of these species have inhibited or facilitated each other, but their different life histories give an impression of a dominant shifting over time. Then you have catastrophic events ie. tsunami where you can have massive destruction in that area. Rates of change can be rapid, chronic, small in effect or large in effect. You can thinkboth in terms of abiotic and biotic factors that are going to cause change in communites either in terms of causing stress and disturbance. Biotic also has physical effects (ie. tampling, digging, boring)
