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WorksheetsAquatic Biodiversity
Total questions: 20
Worksheet time: 13mins
Which of the following are the two greatest long-term threats to coral reefs?
ocean acidification and overfishing
damage by divers and predation
climate change and acidification
erosion and sea-level rise
climate change and predation
Although they only occupy 0.2% of the ocean floor, coral reefs provide many benefits. Which of the following is not one of these?
They provide significant free oxygen.
They serve as natural barriers.
They protect coastlines from erosion.
They provide habitats for one-quarter of all marine organisms.
They provide one-tenth of the global fish catch.
If you find a new species of algae floating on the surface of a coastal zone, you would likely consider it a type of ____.
benthos
zooplankton
nekton
phytoplankton
ultraplankton
A jellyfish would be considered a type of ____.
benthos
zooplankton
nekton
phytoplankton
ultraplankton
Oysters, sea stars, and lobsters would be considered what type of organism?
phytoplankton
zooplankton
nekton
benthos
decomposers
Strongly swimming consumers are most likely to be ____.
phytoplankton
zooplankton
nekton
benthos
decomposers
Which of the following is not part of the saltwater or marine aquatic life zones?
oceans
estuaries
inland wetlands
coastal wetlands
mangrove forests
Which of the following is a major cause of increasing ocean acidification?
eutrophication
construction of dams and levees
rising sea level
rising levels of CO2
decreasing dissolved oxygen
Which of the following is not part of the coastal zone?
estuaries
coastal wetlands
bathyal zone
intertidal zone
coral reefs
Which of the following is a highly productive wetland that provides habitat for some 69 species of trees that can live in salty water?
seagrass beds
barrier beaches
barrier islands
coastal rain forests
mangrove forests
What is an area where a river meets the sea, and includes some of the earth’s most productive wetlands?
euphotic zone
estuary
inlets
bays
coastal marshes
Most photosynthesis in the open ocean occurs in the ____.
abyssal zone
euphotic zone
estuary zone
bathyal zone
benthic zone
The dimly lit zone in which zooplankton and smaller fishes predominate is the ____.
abyssal zone
euphotic zone
estuary zone
bathyal zone
benthic zone
The open, sunlit surface area away from the shore is in which zone?
benthic
littoral
bathyal
limnetic
profundal
Which of the following is NOT a pattern of aquatic biodiversity?
Coral reefs have a high biodiversity
Coastal areas have a high biodiversity
Open ocean has a low biodiversity
The benthic, bottom regions have a low biodiversity
