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Population Ecology I. Attributes II.Distribution III. Population Growth – changes in size through time IV. Species Interactions.

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Presentation on theme: "Population Ecology I. Attributes II.Distribution III. Population Growth – changes in size through time IV. Species Interactions."— Presentation transcript:

1 Population Ecology I. Attributes II.Distribution III. Population Growth – changes in size through time IV. Species Interactions

2 A. Types Effect on Species 2 Effect on species 1 PositiveNeutralNegative Positivemutualismcommensalconsumer Neutralcommensal-amensal Negativeconsumeramensalcompetition

3 IV. Species Interactions B. Consumer-Resource 1. Types

4 IV. Species Interactions A.Consumer-Resource 1. Types

5 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses - Structural, morphological: capture, defense

6 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses - Behavioral: individual and social Sit-and-wait, crypsis pursuit

7 Trade-offs

8 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses - Chemical

9 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses - Chemical

10 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses 3. Novel Aspects of Parasitism Complex life cycles Structurally simple Intimacy may select for mutualism

11 IV. Species Interactions B. Consumer-Resource 1. Types 2. Responses 3. Novel Aspects of Parasitism Complex life cycles Structurally simple Intimacy may select for mutualism

12 IV. Species Interactions B. Consumer-Resource C. Competition 1. Types: - exploitative/‘scramble’ – organisms remove what they can, and neither make get enough - territorial/ ‘contest’ – competition for access to the resource, with ‘winner take all’ 2. Responses - Competititve exclusion (one species wins) - Coexistence by resource partitioning

13 IV. Species Interactions B. Consumer-Resource C. Competition D. Mutualisms 1. Types: - trophic: involve species with complementary feeding relationships and they share food (mycorrhizae) - defensive: one species provides defense to another, in exchange for some service or food (ant-acacia) - dispersive: one species disperses pollen or fruit in exchange for food 2. Responses - Increase frequency and intimacy - May increase the probability of extinction if an obligate relationship develops

14 IV. Species Interactions B. Consumer-Resource C. Competition D. Mutualisms

15 IV. Species Interactions B. Consumer-Resource C. Competition D. Mutualisms E. Interactions are not Static 1. Competition – Faciliation Continua

16 IV. Species Interactions B. Consumer-Resource C. Competition D. Mutualisms E. Interactions are not Static 2. Parasitism – Mutualism Continua


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