Exam 45: Community and Ecosystem Ecology

What is the correct sequence of organisms if a community is going through secondary succession? A. grasses establish themselves in the community B. shrubs establish themselves in the community C. soil formation occurs D. trees establish themselves in the community

All food chains begin with a photosynthetic producer.

The actual conditions under which an organism exists in nature constitute its

The relationship between plants and their pollinators is a good example of parasitism.

All of the conditions under which an organism could conceivably survive and reproduce constitute its

Compared with the numbers of grasshoppers or deer, there are not a lot of mountain lions. The reason that large and fierce top-level carnivores are rare in an ecosystem is that

Which type of succession would occur after a volcanic eruption?

The only heterotrophs required in an ecosystem are

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy

What occurs when two species with very similar niches live in an overlapping range?

What does the model of island biogeography predict about: A. the relationship between the distance of an island from the mainland and immigration of species? Draw a graph depicting the relationship. B. the relationship between the size of an island and the rate of extinction? Draw a graph depicting the relationship. C. what type of island will have a higher equilibrium species richness than the other types of islands? Combine (and draw) the two previous graphs and indicate the equilibrium species richness of each island.

Which of the following statement(s) about the hydrologic cycle is (are) true?

Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?