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which coastal habitat is a mixing place of fresh and saltwater


ocean areas of high productivity are often found

where nutrient-rich water from the ocean depths wells up along coasts

some of the devastating effects of hurricane katrina occured because the natural ____ in the area vanished as a result of human activity

salt marshes

sea otters act as keystone species in the

kelp forests

zooxanthellae are

symbiotic algae that provide coral reefs with energy via their photosynthetic activity

hydrothermal vents

provide nutrients to symbiotic bacteria that support ecosystems at the ocean floor

salt marshes

occur mostly in temperate areas

what will hopefully reduce solid wastes in oceans

marine debris research, prevention and reduction act

the largest single source of oil that accumulates in the ocean is from

seepage from natural sources

communities that lie along shorelines between the farthest reach of high tide and the lowest reach of the lowest tides do not include

coral reefs

excessive nutrient concentrations in the oceans give rise to population explosions of


if oil accumulates in a body of water in small amounts over time as a result of leaks from boats and runoff from land, then this oil pollution is from

non-point sources

which ocean pollutant can enter the tissues of marine organisms and make fish and shellfish unsafe for us to eat


what is true of eutrophication in marine systems

it can lead to algal blooms and red tides that kill fish

managing fish populations by maintaining them at a maximum growth rate and achieving maximum yield while keeping fish available for the future is best called

maximum sustainable yield

populations in ocean fisheries have been dropping for decades, but the amount of fish caught has not shown this drop. what factor is responsible for hiding this drop in fish populations

advanced technology has allowed fishing fleets to more quickly find fish

when fish and other ocean organisms are caught accidentally along with targeted fish, it is called


which of the following fishing methods involves dragging weighted nets across the ocean floor in an attempt to catch groundfish


what ocean area would be a true protected area, free of fishing

marine reserves

what is true regarding marine reserves

they tend to increase species diversity

why are marine reserves ecologically better than fish farms

they restore damaged habitats and allow overfished species to reproduce and spread

currently, the greatest ecological crisis facing marine food webs is


hypoxia and autrophication in chesapeake bay may in part be attributed to

harvesting of oysters that previously would have filtered nutrients

most presentday fisheries managers

with to set aside areas of ocean where systems can function without human interference

the main environmental problem caused by harvesting bottom-dwelling mollusks is

habitat destruction

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