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The Yellowstone River ecosystem can support 2,300 bald eagles. This is an example of

The Yellowstone River ecosystem can support 2,300 bald eagles. This is an example of temperate- zone ecosystems

Explanation:

Yellowstone National Park is a natural  paradise with over 70 species of birds,which  include  trumpeter swans, sandhill cranes, loons, peregrine falcons, osprey and bald eagles

The Greater Yellowstone Ecosystem, with Yellowstone at its core, is one of the largest nearly intact temperate- zone ecosystems on Earth. It has an area of 12–22 million acres; 18,750– 34,375 square miles

Temperate ecosystems are the ecosystem that are characterized by the  seasonality in temperature, with cooler winters and warmer summers, and also  show various  seasonality in precipitation patterns, resulting from seasonal changes in the orientation of Earth's axis relative to the sun.

The Yellowstone River ecosystem can support 2,300 bald eagles. This is an example of temperate- zone ecosystems

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: