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WorksheetsAquatic Ecology
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
Which of the following is not a factor in determining where an organism lives in an aquatic ecosystem
a)
distance
b)
temperature
c)
sunlight
d)
oxygen
2.
The zone that exists in shallow; sunlit water
a)
tropical
b)
littoral
c)
benthic
d)
eutrophic
3.
Which of the following describes a function of a wetland
a)
Trap and filter pollutants
b)
add nutrients
c)
reduce flooding
d)
controls sunlight
4.
Where are swamps usually found?
a)
flat, poorly drained area near streams
b)
in nonwoody areas
c)
away from streams
d)
In sloped areas with few plants
5.
Why estuaries very productive ecosystems?
a)
they constantly receive nutrients
b)
they have a large biodiversity
c)
they are close to the shore
d)
they absorb excess water
6.
This ecosystem is dominated by grasses
a)
wetlands
b)
Bogs
c)
Mangroves
d)
marshes
7.
Which of the following is a threat to coral reefs?
a)
Salinity
b)
Runoffs
c)
Temperature
d)
Dams
8.
Increase in nutrients
a)
Salinity
b)
runoffs
c)
eutrophication
9.
Which of the following is a threat to ocean organisms?
a)
lack of nutrients
b)
climate change
c)
nets
d)
silt
10.
What determines the arrangement of organisms in the ocean?
a)
nutrients and salinity
b)
sunlight and nutrients
c)
salinity and sunlight
d)
oxygen and salinity
11.
Why does photosynthesis not occur in the deep ocean?
a)
Lack of nutrients
b)
Low oxygen levels
c)
Excess sunlight
d)
Sunlight does not penetrate
12.
Estuaries are constantly receiving nutrients from
a)
rivers and oceans
b)
coral reefs
c)
lakes and ponds
d)
photosynthesis
13.
Which of the following is a factor that influences where an organism lives in an aquatic ecosystem?
a)
sunlight
b)
nutrient availability
c)
temperature
d)
all of the above
14.
In which of the following aquatic ecosystems are both littoral and benthic zones most likely found in ?
a)
Open ocean
b)
coral reef
c)
lake
d)
none of the above
15.
Estuaries
a)
are always saltwater ecosystems
b)
are always freshwater ecosystems
c)
are a mix of both freshwater and salt water
d)
prevent the development of salt marshes
16.
What is the source of most ocean pollution
a)
activities on land
b)
climate change
c)
aquatic animals
d)
none of the above
17.
All of the following are examples of saltwater ecosystems except
a)
mangrove swamps
b)
coral reefs
c)
salt marshes
d)
the Florida Everglades
18.
Which of the following is not a threat to coral reefs?
a)
silt runoff
b)
excessive nutrients
c)
growth of algae
d)
zooplankton
19.
Located near the bottom of a pond or lake
a)
benthic
b)
littoral
c)
swamp
d)
eutrophic
20.
Limestone ridges built by tiny animals
a)
runoff
b)
marsh
c)
coral reef
d)
lake
21.
Organism that breaks down dead organisms
a)
plankton
b)
benthos
c)
decomposer
d)
nekton
22.
Which of the following is not a freshwater ecosystem?
a)
Lake
b)
Ocean
c)
River
d)
Stream
23.
Bottom dwellers such as mussels
a)
Nekton
b)
Decomposer
c)
Plankton
d)
Benthos
24.
Amount of dissolved salt
a)
estuary
b)
eutrophication
c)
salinity
d)
runoff
25.
Free swimming organism
a)
Nekton
b)
Plankton
c)
Benthos
d)
Decomposer
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