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Chapter # 13 – Interspecific Competition (pg. 258 – 280). Chapter # 13 – Interspecific Competition (pg. 258 – 280). 13.1 – Interspecific Competition Involves Two or More Species. Six different types of interactions:. Consumption (of a shared resource) - PowerPoint PPT Presentation
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Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.1 – Interspecific Competition Involves Two or More Species.
Chapter #13 – Interspecific Competition(pg. 258 – 280)
Six different types of interactions:
1. Consumption (of a shared resource)2. Preemption (sessile – occupation precludes establishment)3. Over-growth (plants – when one overgrows another)4. Chemical Interaction (released chemicals inhibit or kill)5. Territoriality (behavioral exclusion)6. Encounter (Non-territorial meetings w/negative effects)
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
dNDt
= rN (K – N)K
Logistic Growth Equation for 1 species:
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Logistic Growth Equation for 2 species:
rN (K – N)K
= rN (K – N)K
Species 1 Species 2
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Logistic Growth Equation for 2 species:
rN (K – N)K
= rN (K – N)K
Species 1 Species 2
β – competition coefficient of sp. #1 on sp. #2.α – competition coefficient of sp. #2 on sp. #1.
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Logistic Growth Equation for 2 species:Species 1
α – competition coefficient of sp. #2 on sp. #1.
dN1
dt = r1N1
(K1 – N1 – αN2)K1
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Zero GrowthIsoclines
Vittora Volterra
Alfred Lotka
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Lotka-Volterra Model for Competition
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Lotka-Volterra Model for Competition
13.3 – Laboratory Experiments Support the Lotka-Volterra Equations.
Chapter #13 – Interspecific Competition(pg. 258 – 280)
G. F. Gause
David Tilman
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.2 – There Are Four Possible Outcomes of Interspecific Competition.
13.4 – Studies Support the Competitive Exclusion Principle.
The Competitive Exclusion Principle:
“Complete Competitors cannot Coexist”
2 speciesNon-interbreeding populations
Live in the sample and timePossess exactly the same ecological requirements
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.5 – Competition is Influenced by Nonresource Factors.
Chapter #13 – Interspecific Competition(pg. 258 – 280)
13.6 – Temporal Variations in the Environment Influences Competitive Interactions.