Population%2BGrowth%2B2%2BAnswers+_1_

Population%2BGrowth%2B2%2BAnswers+_1_ - that produce a lot...

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Population Growth 2 Study Questions 1. In a nutshell, a species are morphologically similar organisms (at the end of the session we will discuss species as being reproductively isolated lineages). A population consists of individuals of the same species living together at the same time. The two are not the same. A species can be composed of many populations, but a population cannot be composed of many species. A population is composed of only one species. 2. r-selected: here are three (there are many more) Fast growth rate Lots of offspring Short-lived K-selected Slow growth rate Better competitor Longer-lived 3. The curves are given below (approximately): can you describe what each means? 4. Type I (think about why) Type I Type II Type III age # of survivors 1
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5. low 6. There is a constant rate of death (or survivorship) 7. r-selected. Type III (most offspring will die this is why she lays so many eggs). 8. r-selected—high predation rates could be the agent of selection so: In the ancestral population you would have individuals that produce few eggs and others
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Unformatted text preview: that produce a lot of eggs. Those that produce few eggs have offspring that produce few eggs and those that produce a lot of eggs have offspring that produce a lot of eggs. Those that produce a lot of eggs have more individuals that reach adulthood and so reproduce. K-selected-I’ll let you do this one. 9a. Highest: 3 and 4 Lowest: 0 and 6 9b. Plant population size should decrease over time. Focus on age class 3 and 4 because these are the ones with the highest reproductive value (they produce the most offspring) 10. Carrying capacity is the number of individuals that can be supported in a particular location. This is dependent on the resources that are available. K can change for a population. It can decrease if, for example, the population size of the food source is low for a given year. It can increase by us adding food to the environment or the population size of the food source is very high for a given year. 2...
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This note was uploaded on 10/23/2011 for the course BIS 101 taught by Professor Simonchan during the Spring '08 term at UC Davis.

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Population%2BGrowth%2B2%2BAnswers+_1_ - that produce a lot...

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