Questions from Ecology

Q: C. S. Holling (1959) observed predator numerical responses

C. S. Holling (1959) observed predator numerical responses to changes in prey density. He attributed the numerical responses to changes in the reproductive rates of the predators. Discuss a hypothetic...

Q: For what types of organisms is the geometric model of population growth

For what types of organisms is the geometric model of population growth appropriate? For what types of organisms is the exponential model of population growth appropriate? In what circumstances would...

Q: While populations of gray and blue whales have grown rapidly, the

While populations of gray and blue whales have grown rapidly, the North Atlantic right whale population remains dangerously small despite many decades of complete protection. Assuming that differences...

Q: How do you build the logistic model for population growth from the

How do you build the logistic model for population growth from the exponential model? What part of the logistic growth equation produces the sigmoidal growth curve?

Q: In question 3, you thought about how the logistic growth equation

In question 3, you thought about how the logistic growth equation produces a sigmoidal growth curve. Now, let’s think about nature. What is it about the natural environment that produces sigmoidal gro...

Q: Skole and Tucker (1993) documented the rate and extent of

Skole and Tucker (1993) documented the rate and extent of recent deforestation in the Amazon Basin in Brazil. This is a prominent example of the land cover changes that likely threaten biological dive...

Q: What is the relationship between per capita rate of increase, r

What is the relationship between per capita rate of increase, r, and the intrinsic rate of increase, rmax? In chapter 10, we estimated r from the life tables and fecundity schedules of two species. Ho...

Q: Both abiotic and biotic factors influence birthrates and death rates in populations

Both abiotic and biotic factors influence birthrates and death rates in populations. Make a list of abiotic and biotic factors that are potentially important regulators of natural populations.

Q: Population biologists may refer to abiotic factors, such as temperature and

Population biologists may refer to abiotic factors, such as temperature and moisture, as density-independent because such factors can affect population processes independently of local population dens...

Q: Where on earth is human population density highest? Where is it

Where on earth is human population density highest? Where is it lowest? Where on earth do no people live? Where are human populations growing the fastest? Where are they approximately stable?