AP Bio - Ecology Podcast 7

1. AP Bio - Ecology Podcast 7 Population Ecology Population Ecology – Describing a Population

2. Remember Our Levels of Biological Organization… Population - All members of a species in a contiguous area

3. Interactions with a population may be intense • Group of individuals of same species in same area at same time • rely on same resources • interact • interbreed Population Ecology: What factors affect a population?

4. Goals of Population Ecology • Scientific goal • understanding the factors that affect populations and their size/growth • general principles • specific cases • Practical goal • management of populations • increase population size • Ex: endangered species • decrease population size • Ex: Invasive species • maintain population size • Ex: fisheries management

5. Describing a Population • Describing a population • population range • pattern of spacing • density • size of population range density

6. Population Range • Geographical limitations • abiotic & biotic factors • temperature, rainfall, food, predators, etc. • habitat adaptations topolar biome adaptations torainforest biome

7. At risk populations • Endangered species • Severe limitations to range / habitat • places species at risk • Habitat loss perhaps greatest threat to species

8. Population Density/Spacing Provides insight into the environmental needs & social interactions of individuals in population • 3 Typical Patterns clumped random uniform

9. Uniform May result from direct interactions between individuals in the population  territoriality Clumped patterns

10. Clumped Pattern (most common)

11. Random Pattern (least common)