Exam 19: Ecosystem Essentials

Increased foliage cover in parts of Australia has been attributed to which of the following climate change related phenomena.?

The proposition that no two species can occupy the same ecological niche is known as the

Which of the following is the correct order of lake succession, from lowest to highest nutrient levels?

An orogeny that separates a once continuous population of a species is an example of vicariance.

A leech that sucks blood from an animal is in an example of commensalism.

Altitudinal community assemblages at a constant latitude are often similar to latitudinal community assemblages at a constant elevation.

Photosynthesis converts

Which of the following is not a abiotic component of an ecosystem?

Of the total energy intercepted at Earth's surface and available for work, only about ________ is actually fixed by photosynthesis.

When a random occurrence produces altered genetic material and inserts new traits into the inherited stream, ________ has occurred.

The net dry weight of all organic material in an ecosystem is known as

Since life arose on Earth, ________ major extinctions have occurred.

If a forest fire destroyed the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?

An ecosystem is a(n) ________ system in terms of energy, and a(n) ________ system in terms of matter.

Within a lake, eutrophic conditions predominate in deep, open water.

The openings on the surfaces of plant leaves through which gases move into and out of are known as

Addressing and mitigating climate change may become an essential component of species conservation.

Autotrophs that dwell in dark caves, in wells, or on the ocean floor often depend on which of the following biogeochemical processes?

Studies have shown that ________ biodiversity in an ecosystem leads to ________ long-term stability and productivity.

The distribution of species is based on both biotic and abiotic factors.