Lecture on Ecology - Lecture on Ecology: 1. : 1. A...

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Lecture on Ecology: 1. : 1. A population is defined as a collection of individuals of the same species that interact with each other (same time, same place) 2. A community is a collection of populations that interact with each other 3. An ecosystem is a community plus its physical environment 4. The biosphere is a collection of all the ecosystems on, in, or above the earth. 2. Exponential: 1. Growth of the populations= (Birth-Deaths) (number of individuals in the population) —G=nN 1. If births are higher than deaths the population will continue to grow and the population will grow, but eventually level out when (K-N/K) is factored in. 3. Logistic Curve: 1. Parts of a logistic curve: 1. Phase of accelerating growth 2. Inflection point 3. Phase of decelerating growth 4. Asymptote, when k=n 2. Limiting factors: 1. Density dependent factors: competition for resources (food, water, nesting sites) predation, infectious disease, parasitism 2. Density independent factors: fire, flood, storms
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Lecture on Ecology - Lecture on Ecology: 1. : 1. A...

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