Answer Happy

3 2.5 points Careful observers of nature realized that many animals have relatively constant breeding populations sizes. According to Dr. Colinvaux, what is the primary reason for this? Any surplus breeding individuals are killed in the deep winter by lack of food. Predators will keep the size of the breeding population constant by removing surplus individuals. Species know their own carrying capacity "K" and reduce the number of offspring when the population grows too much. Suitable breeding habitat is limited, and a certain amount of space is needed to successfully breed. 2.5 points How did scientist first prove that the size of breeding populations is defined by space? Scientists found that no matter how many breeding birds were killed in their territories, new breeding birds continued to arrive to take their place. Careful counts of animals showed that many individuals were in the high canopy not breeding. Scientists increased the area of new breeding habitat and found that additional birds arrived to fill it. Scientists marked birds in the territories and monitored those that did and did not breed over many years