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26 Cards in this Set
- Front
- Back
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coral reefs protect about ___% of the world's coastlines from erosion
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15%
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___ are weakly swimming, free floating animals, bacteria or plants
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plankton
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Where are dissolved oxygen concentrations highest in the ocean?
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near the surface
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oceans provide ecological and economic services such as....
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1. nutrient cycling
2. animal and pet food 3. oil and gas 4. pharmaceuticals |
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True or false?
the arctic tundra is too dry to be considered a wetland |
false
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In a ____j, streams join to form wider and deeper rivers that meander across valleys
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floodplains
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Atlantic City, NJ is built on a
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barrier island
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how many of the world's coral reefs are protected as reserves or parks
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300
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Freshwater is defined as having less than ___% dissolved salt concentration by volume.
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1%
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Which of the following is not considered a wetland habitat?
a. prairie pothole b. barrier island dune c. arctic tundra in summer d. swamp |
Barrier island dune
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Which part of a river would have the least sediment load and coldest water?
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source zone
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the ability of a living system to resist being disturbed or altered is
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inertia
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The major types of organisms found in aquatic environments are determined by :
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-the water's salinity
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salinity
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the amounts of various slats such as sodium chloride dissolved in water
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what are two major types of aquatic life zones
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-salt water/marine (estuaries, coastlines, coral reefs)
-freshwater (lakes, streams) |
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The world's saltwater and freshwater aquatic systems cover about ____ of the earth's surface
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71%
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Four major types of organisms in saltwater and freshwater life zones
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1. plankton
2. nekton 3. benthos |
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Plankton
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-weakly swimming, free floating organism carried by currents
-has three major types |
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what are the three major types of plankton
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1. phytoplankton
2. zooplankton 3. ultraplankton |
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phytoplankton
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-plant plankton
-supports most aquatic food chains and food webs |
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zooplankton
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-animal plankton
-consist of primary consumers that feed on phytoplankton and secondary consumers that feed on other zooplankton -range from single celled protozoa to large invertebrates like jellyfish |
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ultraplankton
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-photosynthetic bacteria that are tiny
-extremely small plankton -responsible for about 70% of the primary productivity near the ocean surface |
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nekton
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-strongly swimming consumers such as fish, turtles, and whales
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benthos
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-dwells on the bottom
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example of benthos
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barnacles and oysters that anchor themselves to one spot
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decomposers
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mostly bacteria that breaks down the organic compounds in the dead bodies and wastes of aquatic organisms into simple nutrient compounds for use by producers
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