Exam 30: Earths Diverse Ecosystems

Reef- building corals enter into a mutually beneficial relationship with photosynthetic protists called as a means of obtaining food.

In a tropical rain forest, the majority of animals are found

You are called to investigate a lake in your home town, where the residents fear that a broken pipe from the local sewage treatment plant has turned the formerly pristine lake eutrophic. What three things would you measure, or observe, in the lake to determine whether it is eutrophic?

-As cities along the western coast of North America grew, people began building houses in the chaparral regions. Many homeowners have chosen to landscape with drought- resistant native plants in an effort of conserve water, a valuable resource in this dry biome. Nevertheless, the dry chaparral summer remains susceptible to fires. Nearly every year, fires sweep through the area, destroying homes, displacing people, and costing millions of dollars. What is the best solution to this problem?

The primary driving force behind winds, ocean currents, and the global water cycle is

Why do areas of upwelling tend to have large and diverse populations of organisms?

In the unique seafloor vent community, the primary producers are

The highest biodiversity is found in temperate deciduous forests.

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?

Which area contains aquatic organisms that can tolerate exposure to air?

-What biome would you expect to find at 45° N latitude and elevations of 2,500 meters?

Plants from both the chaparral and the Arctic have waxy coatings even though the temperatures in the two biomes are vastly different. Why?

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

Which biome probably contains the largest number and most diverse group of large mammals?

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

Patterns of temperature and precipitation that prevail over years are referred to as weather.

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

Which biome is rapidly expanding into the African Sahel?

The is the zone near the shore of a lake where a diverse group of organisms lives and where light and nutrients are abundant.

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