The exponential model describes population growth in an idealized, unlimited env

Question

The exponential model describes population growth in an idealized, unlimited environment and the logistic model describes how a population grows more slowly as it nears its carrying capacity. Compare the exponential model of population growth with the logistic model. What expectations do we have about exponential growth in natural populations? Under what conditions might we expect to see natural populations increase exponentially? What can modeling an organism's capacity to grow exponentially tell us about it? Explain how an environment's carrying capacity affects the per capita rate of increase of a population. Explain the meaning of each of the following terms in the logistic model of population growth: dN/dt, r_max, K - N, and (K - N)/K Distinguish between r - selected populations and K - selected populations

Explanation / Answer

Answer:

A) Exponential growth model of population used when resourses are unlimited

Logistic growth model are used when resourses are limited

We could expect that, exponential growth of natural populations can go on indefinitely & boundless

When growth of population increases rapidly, we might expect to see natural population increases exponentially.

When population can maintain a constant growth rate percentage and can leverage the steady increase in population , the modeling of an organism capacity can grow exponentially.

B)

The carrying capacity of a population is the maximum population size of the species that the environment can sustain indefinitely. The limiting factors per capita will be affected by the food, habitat, water and other necessities in the environment.

r- is the rate of growth. r=dN/dT i.e The change in the number of individuals (dN) per change in time (dT)

53.3 C)

r-selected populations are with high growth rate, less crowded ecological niches. They produce many number of offspring, but only few live without their life span. r-selected populations live in variable, unstable habitat

Whereas k-selected populations resides in stable envirinmonet. They are relatively stable population and tend to produce low number of offspring in comparison with r-selective species.

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