Ch. 7 Key Terms Flashcards

1
Q

wetlands

A

an area of land that is periodically underwater or whose soil contains a great deal of moisture

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2
Q

plankton

A

the mass of mostly microscopic organisms that float or drift freely in the waters of aquatic environments

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3
Q

nekton

A

all organisms that swim actively in open water, independent of currents

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4
Q

benthos

A

organisms that live at the bottom of oceans or bodies of fresh water

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5
Q

littoral zone

A

a shallow zone in a freshwater habitat where light reaches the bottom and nurtures plants

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6
Q

benthic zone

A

the bottom region of oceans and bodies of fresh water

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7
Q

eutrophication

A

an increase in the amount of nutrients such as nitrates in a marine or aquatic ecosystem

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8
Q

estuary

A

an area where fresh water from rivers mixes with salt water from the ocean; the part of a river where the tides meet the river current

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9
Q

salt marsh

A

a maritime habitat characterized by grasses, sedges, and other plants that have adapted to continual, periodic flooding; salt marshes are found primarily throughout the temperate and subarctic regions

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10
Q

mangrove swamp

A

a tropical or subtropical marine swamp that is characterized by the abundance of low to tall trees, especially mangrove trees

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11
Q

barrier island

A

a long ridge of sand or narrow island that lies parallel to the shore

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12
Q

coral reef

A

a limestone ridge found in tropical climates and composed of coral fragments that are deposited around organic remains

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