What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague...
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Transcript of What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague...
![Page 1: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/1.jpg)
What Regulates Population Growth?
Abiotic: Physical Factors
Biotic: Density-Dependence
Density-Vague Regulation
![Page 2: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/2.jpg)
Discrete Generation Growth
Model Characteristic
Density-Independent
Geometric Growth
Density-Independent
Geometric Mean Growth
Density-Dependent Growth
![Page 3: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/3.jpg)
Biotic Regulation
• Density-Dependence
• Individual-Level, Birth and Death– Depends on Population Size
• Driven by Ecological Interactions
![Page 4: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/4.jpg)
Self-Regulation
• Species Growth Responds to Own Density
• Intra-specific Competition
• Limiting resource(s)
![Page 5: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/5.jpg)
dN/dt = F(N) N
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Glycine soja (soy bean)
![Page 7: What Regulates Population Growth? Abiotic: Physical Factors Biotic: Density-Dependence Density-Vague Regulation.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697bfc91a28abf838ca92a3/html5/thumbnails/7.jpg)
Tribolium confusum (flour beetle)
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“ – 3/2 Rule”
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Drosophila melanogaster
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Melospiza melodia (song sparrow)Seed Production
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Logistic Growth
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Brewer’s yeast
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Tasmanian sheep
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References
• http://jan.ucc.nau.edu/~doetqp-p/courses/env470/Lectures
• http://www.micro.utexas.edu/courses/levin/bio304