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AINY Generation Time and The Rate of Population Growth Discussion

AINY Generation Time and The Rate of Population Growth Discussion

Question Description

I’m working on a ecology discussion question and need an explanation to help me learn.

Please do me this discussion post.

I need answers to the 3 prompts / ALONG TO 5 PEER REPLIES.rompt 1— (Chapter 12) What is the relationship between generation time and the rate of population growth?

Prompt 2— (Chapter 12) Observe the S-shape curve of the logistic population growth model, and explain the different causes of slow population growth at low population sizes versus high population sizes. (Hint1: Think about the parameters in the logistic population growth model. Hint2: There is NO positive density dependence effect involved.)

Prompt 3— (Chapter 12) The following table for a species of plant that has four life stages was constructed from research done in the 1960s.

Age Class (x)

Survival Rate (sx)

Survivorship (lx)

Fecundity (bx)

Seed

0.3

0

Seedling

0.2

0

Small adult

0.1

20

Large adult

0

50

Forty years later, biologists went back to the same site and determined the life table for the same population, shown in the following table. On account of changing climatic conditions, seed survival decreased from 30 percent to 10 percent. However, these changing climactic conditions also cause large adults to produce four times as many seeds, so that they now produce 200 seeds. All other survival rate & fecundity values stay the same. The Survivorship columns are created for you to help you calculate.

Age Class (x)

Survival Rate (sx)

Survivorship (lx)

Fecundity (bx)

Seed

0.1

0

Seedling

0.2

0

Small adult

0.1

20

Large adult

0

200

Explain whether the change in climate is beneficial or harmful to this plant population based on these tables. Be sure to reference any relevant calculations you should make and explain the relative importance of the decreased seed survival and increased seed production.


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