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Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Copyright © 2005 Brooks/Cole — Thomson Learning Biology,

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Presentation on theme: "Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Copyright © 2005 Brooks/Cole — Thomson Learning Biology,"— Presentation transcript:

1 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh Edition Solomon Berg Martin Ecology: The study of how organisms interact with each other and the environment.

2 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology

3 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology

4 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Ecology Definitions: Habitat: The space or environment when an organism lives Niche: role of an organism in a community Biotic Factors: All the living things within an environment Abiotic Factors: All the physical (non-living) things in an environment

5 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology

6 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Limiting Resources Environmental factors that restrict the growth of populations. Examples: –Food –Habitat –water

7 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Effect of competition on an organism’s realized niche

8 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Competition Two or more individuals attempting to use the same resource Intraspecific competition –Among individuals within a population Interspecific competition –Between different species

9 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Interspecific competition

10 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Competitive exclusion principle Two species cannot occupy the same niche in the same community for an indefinite period One species is excluded by another as a result of competition

11 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Some species reduce competition by resource partitioning Competition among species is reduced by character displacement Structural ecological and behavioral characteristics diverge where ranges overlap

12 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Resource partitioning

13 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Ecological interactions among species

14 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Symbiosis Mutualism –Both partners benefit Commensalism –One partner benefits and the other is unaffected Parasitism –One partner benefits while the other is harmed

15 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Mutualism between flowering plants & pollinators

16 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Mutualism between clown fish & sea anemone Mutualism between clown fish & sea anemone

17 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Commensalism: Spanish moss & trees

18 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Parasitism: Ticks and Mammals

19 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Parasitism

20 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Predation Consumption of one species (the prey) by another (the predator) Co-evolution Predator and prey both evolve more efficient ways to interact

21 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Predator-Prey Graph

22 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Defenses Mechanical defenses Associating in groups Camouflage Warning coloration Mimicry

23 Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh EditionCHAPTER 52 Community Ecology Prey Defense Mechanisms

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