Exam 10: Ocean Ecosystems

-Fishery collapse occurs when a population of fish declines to __________ percent of its former levels.

-How does most plastic get into the oceans?

-Compared to lower latitudes, polar coastal waters are relatively little influenced by people.

-Seafloor topography is called bathymetry.

-According to this figure, how deep do green wavelengths of light penetrate the ocean?

-What percentage of the oxygen in the atmosphere originates from photosynthetic organisms in the oceans?

-__________ is a place where fish are caught for human consumption.

-Which is not a threat to beaches?

-Light penetrates up to __________ meters in seawater.

-The lighted surface region is the __________ zone.

-Hydrothermal vent communities do not depend on sunlight as an energy source.

-Which lettered box in the figure points to seamounts?

-Referring to the variation in ocean salinity map, which statement describes ocean water salinity at high latitudes?

-__________ entraps fish with a large net.

-Which lettered location on the map shows the warmest water?

-According to the figure, which wavelengths of insolation penetrate least in seawater?

-Coral reefs are the most biodiverse marine ecosystem.

-The deepest parts of the ocean are found in the __________ zone.

-__________ employs thousands of baited hooks on lines up to 80 kilometers (50 miles) in length.

-The mesopelagic zone occurs at a depth of __________ meters.