Homework: Population Growth and Carrying Capacity There are limits on the sizes of populations ecosystems can support. These limits—the carrying capacities for particular populations—are determined by the resources available and the other species present in the ecosystem. Carrying capacities of an ecosystem change as the resources in the ecosystem change. The graph below shows 25 years of population levels of zebra mussels in a lake.
Initially the zebra mussel population grew to a point where the lake could not sustain it, but by Year 14 the population had decreased to a level at which the ecosystem was able to sustain it over an extended period of time. What factors do you think might change the carrying capacity for this population? Many organisms have interdependent relationships. In other words, they rely on each other. In predator–prey relationships, the size and health of one population is frequently closely tied to the size and health of the other. A change in a population level is one indicator that can reflect the health of an ecosystem. A population of a successful invasive species, such as duckweed, will increase rapidly in a new habitat, possibly causing the populations of other, native species to shrink. This can change both population and biodiversity levels. You saw several examples of this in the first few activities of this unit. The population growth rate describes the change in a population over specified intervals of time. A positive growth rate indicates that the population is growing, while a negative growth rate indicates the population is shrinking. Populations will grow when the number of births are larger than the number of deaths. While a population will shrink if the death rate exceeds the birth rate. Migration, the movement of organisms into and out of a population also plays a role. A population that remains the same size has a zerogrowth rate, or an equal birth and death rate.
In this activity you will examine how different variables affect population growth rates of a fish population and the carrying capacity of the ecosystem the population lives in. Check for understanding questions : Please answer these questions using complete sentences and scientific language in your responses. 1. Based on the definition, describe 3 resources the may limit the carrying capacity of an ecosystem. 2. Read the graph above and identify the carrying capacity for the Zebra Mussel population. Justify your choice. Draw a dotted line on the graph to show carrying capacity. 3. Explain how birth rate and death rate play a role in population size. Then, based on the definition of migration, explain how you think it also plays a role in population size. 4. Describe the purpose of this lesson.
Homework: Population Growth and Carrying Capacity ...
This can change both population and biodiversity levels. You saw several examples of this in the first few activities of this unit. The population growth rate describes the change in a population over specified intervals of time. A positive growth rate indicates that the population is growing, while a negative growth rate indicates ...
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Keywords: Carrying Capacity, Social carrying capacity, perceived crowding, Reported encounters, Norms, Cenang beach. Blessed with a richness of geological ...
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Given a polynomial p (x), use synthetic division to divide by x - a and obtain the quotient and the (nonzero) remainder. Write the result in the form p (x) = (x - a)(quotient) + p (a). You may wish to carry out a check. 9. (7 x 3 - 4 x 2 - 400x - 100