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
