Review for Aquatic Ecosystems Test

Estuaries are productive ecosystems because they constantly receive nutrients from

• rivers and oceans

• coral reefs

• lakes and ponds

• photosynthesis

Which of the following is the BEST list of the factor(s) that influence(s) where an organism lives in an aquatic ecosystem?

• sunlight and sediment

• temperature, sediment, and nutrient availability

• sunlight, nutrient availability, and temperature

• temperature

In which of the following aquatic ecosystems are both littoral and benthic zones most likely found?

• coral reef

• stream

• shallow pond

• lake

What is the source of most ocean pollution?

• activities on land

• climate changes

• aquatic animals

• aquatic plants

Estuaries

• are always saltwater ecosystems

• are always freshwater ecosystems

• are ecosystems where both fresh water and salt water are present

• prevent the development of salt marshes

One way in which wetlands control flooding is by

• filtering out water pollutants

• absorbing water from rivers

• providing habitats for migratory wildlife

• reducing the amount of carbon dioxide released into the air

Which of the following is an example of a marine (saltwater) ecosystem?

• coral reef

• pond

• lake

• stream

Bottom dwelling organisms are associated with which term?

• plankton

• nekton

• phytoplankton

• benthos

Free-swimming organisms are associated with which term?

• phytoplankton

• zoo plankton

• nekton

• benthos

Swamps are commonly found on

• rocky hillsides

• flat, poorly drained land

• mountain peaks

• bottoms of lakes or ponds