Exam 30: Earths Diverse Ecosystems

_________of timber for lumber and paper has severely damaged the northern coniferous forest.

In which biome would you expect to find large numbers of black bears, snowshoe hares, moose, lynx, wolves, and deer?

Which biome is characterized by widely spaced trees surrounded by grasses?

The animals shown in the photographs are found in which biome?

The greatest diversity of plants and animals is found in

In aquatic ecosystems, the highest nutrients levels are found in areas that have the

The vast treeless region near the Arctic Ocean is the

In the temperate rain forest, the establishment of new tree seedlings is limited by the lack of light reaching the forest floor.

Describe the climate in the northern coniferous forest, and explain how that climate favors the type of forest found there.

In temperate deciduous forests, trees drop their leaves in response to reduced sunlight.

Explain why there are enormous deserts in the area of the United States known as the Great Basin, which is east of the Sierra Nevada Mountains and west of the Rockies.

Pronounced wet and dry seasons and warm year -round temperatures are characteristic of

On the basis of nutrient content, a lake that has received large amounts of runoff from farms, feedlots, or sewage is classified as a(n) _________lake.

A biome that is characterized by an annual rainfall of 10 inches or less is called a_________ .

Wetlands remove toxins, pesticides, and sediments from water, acting as a natural water purifier.

In one area is a desert ecosystem and in another area is a tundra. What two fundamental resources differ in the ecosystems of these two areas? Why are these two more important than the other fundamental resources?

The Atlantic cod population decreased dramatically during the 1900s due to overfishing. What conservation measure, presently being applied, is most likely to help this fish population recover?

Eutrophic lakes have high nutrient levels and dense plant communities.

The deep ocean floor doesnʹt have enough light to support any producers.

Plant life in the different biomes is limited only by the amount of sunlight.