Questions from Ecology

Q: Some paleontologists have proposed that overhunting caused the extinction of many large

Some paleontologists have proposed that overhunting caused the extinction of many large North American mammals at the end of the Pleistocene about 11,000 and 10,000 years ago. The hunters implicated b...

Q: All the keystone species work we have discussed in chapter 17 has

All the keystone species work we have discussed in chapter 17 has concerned the influences of animals on the structure of communities. Can other groups of organism’s act as keystones? What about paras...

Q: The dams that have been built on many rivers often stabilize river

The dams that have been built on many rivers often stabilize river flow by increasing flows below the dam during droughts and decreasing the amount of flooding during periods of high rainfall. Using t...

Q: Humans have been living in the tropical rain forests of the New

Humans have been living in the tropical rain forests of the New World for at least 11,000 years. During this period, disturbance by humans has been a part of these tropical rain forests. Use the inter...

Q: Why do introduced predators possibly threaten the species diversity of a community

Why do introduced predators possibly threaten the species diversity of a community such as Lake Victoria, while indigenous predators do not? Think in evolutionary timescales as you develop your answer...

Q: Review the Hardy-Weinberg equilibrium equation. What parts of the

Review the Hardy-Weinberg equilibrium equation. What parts of the equation represent gene frequencies? What elements represent genotype frequencies and phenotype frequencies? Are genotype and phenotyp...

Q: Population, community, and ecosystem ecologists study structure and process.

Population, community, and ecosystem ecologists study structure and process. However, they focus on different natural characteristics. Contrast the important structures and processes in a forest from...

Q: M. Huston (1994b) pointed out that the well-

M. Huston (1994b) pointed out that the well-documented pattern of increasing annual primary production from the poles to the equator is strongly influenced by the longer growing season at low latitude...

Q: Many migratory birds spend approximately half the year in temperate forests during

Many migratory birds spend approximately half the year in temperate forests during the warm breeding season and the other half of the year in tropical forest. Given the analyses you made in question 2...

Q: Field experiments demonstrate that variation in soil fertility influences terrestrial primary production

Field experiments demonstrate that variation in soil fertility influences terrestrial primary production. However, we cannot say that nutrients exert primary control. That role is still attributed to...