How does climate change affect environmental sustainability

Exotic species are especially threatening to what kind of ecosystem? deserts marine ecosystems islands tropical forests

Which of the following statements is supported by the results of studies at the Hubbard Brook Experimental Forest? a. Most of the energy captured by primary producers is lostbefore it reaches the highest trophic level in an ecosystem. b. Deforested watersheds experience significantly less runoffthan undisturbed watersheds. c. Deforested watersheds lose more calcium and nitrogen inrunoff than undisturbed watersheds. d. Nutrients generally move through biogeochemical cycles veryquickly. e. Deforested watersheds generally receive more rainfall thanundisturbed watersheds.

A food chain would be a better resource than a food web to answer which question? How does energy move from an organism in one trophic level to an organism on the next trophic level? How does energy move within a trophic level? What preys on grasses? How is organic matter recycled in a forest?

Greenhouse gases ________. a. slow the escape of heat from Earth into space b. are produced by natural and human activities c. are at higher levels than they were 100 years ago d. all of the above

Which biogeochemical cycle does not have a gaseous component but cycles from the land to sediments in the ocean and back to the land? (a) carbon cycle (b) nitrogen cycle (c) phosphorus cycle (d) hydrologic cycle (e) neither a nor c has a gaseous component

What kind of ecosystem are exotic species especially threatening to? a. deserts b. marine ecosystems c. islands d. tropical forests

What are two reasons for deforestation in tropical rain forests? What is the main reason for deforestation of boreal forests?

Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem? biomassification biomagnification bioentropy heterotrophy

Why are drinking water supplies still a major concern for many countries?