Nonnative Species In Aquatic Ecosystems Answers

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How does pollution affect marine life?

Pollution causes a decrease in phytoplankton populations and therefore a decrease in the occurrence of algal blooms.

Pollution causes destruction of coral reefs, which are important sources of shelter and breeding for marine animals.

Soaps, detergents, and plastics in the ocean decrease the acidity of ocean water, leading to a decrease in carbonate levels.

Pollution affects organisms close to the shoreline, but does not affect marine organisms far from the shore.

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How is an oxbow lake formed?

An oxbow lake is formed when a lake shrinks due to erosion.

An oxbow lake is formed when the wide bend of a river is cut off.

An oxbow lake is formed when high concentrations of salt are present in lakes.

An oxbow lake is formed when a dam or levee is built on a river.

How does the loss of vegetation on shore lines affect waterways?

decreased sedimentation

increased shorelines

increased erosion of water banks

none of the above

Which of the following methods would help decrease marine pollution?

government regulation of agriculture

government regulation of industry

reduction in chemical use

all of the above

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Which of the following practices could help reduce erosion of water banks?

buffer strips

natural fertilizers and pesticides

decrease in fossil fuel emissions

all of the above

Increased awareness of water contamination can help reduce its effects.

How does flooding affect rivers?

It causes river bends to be cut off.

It picks up deposits from floodplains.

It causes rivers to divert.

It causes river channels to change shape.

Reducing access to waterways will lead to an increase in human impact on waterways.

Which of the following is an effect of fossil fuel emission on oceans?

decreased pH

decreased carbonate concentrations

increased CO2 absorption

all of the above

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