10 - 9/15/10 Lecture 10: Population Growth and Interactions...

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9/15/10 1 Lecture 10: Population Growth and Interactions 1. Finish succession 2. Population growth 3. r-selected and k- selected species 4. Population regulation - Abiotic, biotic factors Summary 1 • Succession is community change following either _ habitat disturbance _ (secondary succession) or the exposure of _ new substrate _ (primary succession). • The initial stages of a successional sere depend on the intensity and extent of disturbance. The end-point (climax) is determined by physical factors (soil, climate, etc.). Summary 2 • Early successional species tend to be good colonizers and _ grow rapidlly _; later successional species tolerate ____ _ low resource levels _ and dominate direct interactions with other species. • Succession continues until a _ self ___ _ perpetuating _ climax community develops. Summary 3 • Trends apparent in many successions include the accumulation of biomass, but diversity peaks in intermediate stages. • The nature of the climax is profoundly
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This note was uploaded on 04/06/2011 for the course FNR 103 taught by Professor Staff during the Fall '08 term at Purdue University.

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10 - 9/15/10 Lecture 10: Population Growth and Interactions...

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