Chapter 7 Aquatic Ecosystems Flashcards Preview

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Flashcards in Chapter 7 Aquatic Ecosystems Deck (20)
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1

lake that has a large amount of plant growth due to nutrients

eutrophic lake

2

organisms that float near the surface of water

plankton

3

marine ecosystem dominated by trees with stilt-like roots

mangrove swamps

4

factor that determines where aquatic organisms live

oxygen

5

threat to ocean organisms

over fishing

6

marine ecosystem dominated by marsh grasses

salt marsh

7

bottom of a pond or lake

benthic zone

8

use stinging tentacles to capture prey

corals

9

environmental function of wetlands

flood control

10

threat to river ecosystems

dams

11

Which of the following is not an environmental function of wetlands?
a. increasing runoff
b. absorbing and removing pollutants from water
c. trapping carbon that would otherwise be released into the air
d. controlling floods

a. increasing runoff

12

Which of the following factors is not an important advantage for aquatic organisms living near the surface of a lake or pond?
a. warmer temperature
b. more sunlight
c. presence of decomposing organisms
d. higher oxygen level

c. presence of decomposing organisms

13

Which of the following is not characteristic of salt marshes and mangrove swamps?
a. Both provide habitats for wildlife.
b. Both are dominated by marsh grasses.
c. Both are found along coastal areas.
d. Both are threatened by development.

b. Both are dominated by marsh grasses.

14

Photosynthetic organisms are found mainly in shallow water due to the availability of
a. oxygen.
b. nutrients.
c. sunlight.
d. salt.

c. sunlight.

15

In the _________ zone, aquatic life is diverse and abundant.
a. benthic c. littoral
b. eutrophic d. plankton

c. littoral

16

In the _________ zone, the water is cool and dark.
a. benthic c. littoral
b. eutrophic d. plankton

a. benthic

17

Which of the following is not a threat to coral reefs?
a. oil spills
b. sewage
c. pesticides
d. phytoplankton

d. phytoplankton

18

Estuaries are extremely productive ecosystems because they continually receive fresh nutrients from _________ and _________.
a. rivers, oceans
b. lakes, ponds
c. marshes, swamps
d. streams, springs

a. rivers, oceans

19

What causes most coastal pollution in the United States?
a. lakes and ponds
b. industrial waste and sewage
c. over fishing
d. temperature changes

b. industrial waste and sewage

20

As they flow down a mountain to flatter ground, rivers generally become
a. wider.
b. warmer.
c. slower.
d. All of the above

d. All of the above