Describe Some Biotic Resources That May Be Limited In An Ecosystem

Sunday July 17, 2022

Describe some biotic resources that may be limited in an ecosystem at any one time. c) Describe some abiotic resources that may be limited in an ecosystem at any one time 2. a) What is meant by the term “carrying capacity of a population”? b) is the carrying capacity the same for all species? for all populations of the same species? Discuss. c) What sorts of things determine the carrying capacity of an ecosystem? d) In general, what happens to the resources of an ecosystem as a population increases in size? 3. a) Define the term “population dynamics”. b) What are two means/methods by which a population can increase in size? c) What are two means/methods by which a population can decrease in size? d) Define each of the following terms: natality, mortality, emigration, and immigration. 4. a) What is meant by the term “fecundity”? b) Do all species show the same fecundity? Provide examples of species with a high fecundity. Provide examples of species with a low fecundity. c) Compare the reproductive strategies of a short-lived species such as a starfish and a long-lived species such as a hippopotamus. What are THREE different patterns in “survivorship” that species exhibit? For each pattern a) use a graph/figure to illustrate the pattern, b) describe characteristics of species that show that pattern, and c) provide an example of a species that exhibits that pattern How does the number of offspring that are produced by an individual typically compare with the fecundity of that individual? What sorts of factors create this discrepancy (i.e. limit reproductive potential)? 5. 6. 7. a) What is the formula that is used to determine “population growth” or “population change”? b) A population of 2000 seals produces 950 young in one year. In the same period of time, 150 seals die. 1150 seals leave the population to join another population, and 30 seals join the population under study, what is the “population change of the population under study? c) What is an “open population”? d) What is a closed population? e) Which type of a population ().e., open versus closed) is the most common? What are some examples of closed populations? 0 What is meant by the term “biotic potential”? 1 8. a) What is a density dependent factor? b) List THREE different density dependent factors, c) How did Charles Darwin use the concept of density dependent factors in his Theory of Evolution?


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