Since it is supposed to be humane, we don't want to increase the death rate, and the only other choice is to decrease the birth rate. F. Run the model for 25 years. If you used a value of TFR that was much less than 2.5, you would find that the population decreased, because there is significant infant mortality in this model. Using this example, explain in your own words what the concept of population momentum is, as if you were explaining this to an intelligent adult who was unfamiliar with the term. P. M. is the tendency of a population to increase growing for a generation or two in spite of lowered TFR just because a large percentage of the population is in the reproductive part of their lives, and a small percentage is old enough to die.
Demographers make projections about human population growth trends.
As LDCs follow in footsteps of MDCs more prime agricultural land is lost to roads, housing developments, golf courses, etc. Brown makes several points. On page 134 of your book, Bush makes the statement that Northern Spotted Owls are keystone species, but doesn't give any evidence for this claim. If owls are keystone species, it means that they play a role that is not duplicated by other species, most likely as a keystone predator. This would imply that there are few other rodent eaters in the forest, or at least few that eat the same species that the owl does.