Ch. 7 Key Terms. Flashcards Preview

Environmental systems > Ch. 7 Key Terms. > Flashcards

Flashcards in Ch. 7 Key Terms. Deck (11)
Loading flashcards...
1

Plankton

are organisms that cannot swim against currents, so they are drifters

2

Nekton

are free-swimming organisms, such as fish and whales

3

Benthos

are bottom-dwellers, such as mussels, worms, and barnacles.

4

littoral zone

near the shore, aquatic life is diverse and abundant

5

benthic zone

the bottom of a pond or lake, which is inhabited by decomposers, insect larvae, and clams

6

Eutrophication

is an increase in the amount of nutrients.

7

estuary

is an area in which fresh water from a river mixes with salt water from the ocean

8

salt
marshes

In estuaries, where rivers deposit their load of mineral-rich mud, salt
marshes form.

9

mangrove swamps

Dense growths of mangrove trees in swampy areas called mangrove swamps

10

Barrier islands

Barrier islands, such as the one in Figure 2.4, often run parallel to sandy shores. These islands help to protect the mainland and the coastal wetlands from storms and ocean waves and often provide habitat for wildlife

11

Coral reefs

Coral reefs are limestone ridges built by tiny coral animals called coral polyps and the algae that live inside them.