Human Impacts Test Review

Ecosystem based management (select all that apply)

• Means fisheries should focus on only one species

• is responsible for most overfishing of the world

• requires fisheries to take into account how a fish species fits into ecosystem

• Requires precautionary approach that requires restraint in the face of uncertainty or lack of info no the environment

A warmer world is least likely to result in...

• Decreased food production

• reduction in biodiversity

• a rise in sea level

• moderate weather

• Spread of tropical diseases

Climate Models project all of the following, except

• a 2-4.5 degree rise in the avg. temperature

• human responsibility for the changes in temp

• falling of sea levels

• human activities playing a greater role in this century

All of the following are true about the aquatic industry except

• It is currently responsible for one third of the fish consumed globally

• it is responsible for the destruction of mangrove forests and other habitats on the coast

• it can be a major source of water pollution

• it has no negative environmental effects

• It can spread diseases to local wild fish

Which of the following best describes the earth's avg. surface temp for the past 900,000 years?

• Steady warming trend

• same temperature throughout

• prolonged periods of cooling and warming

• fairly steady with occasional cool spells

• fairly steady with a recent cooling trend.

As many as 90% of the ocean's predatory fish have been fished out. The trageted fishing of top predators could have the following consequences.

• Whole ecological communities and food webs could be changed

• coral reefs could be bleached

• populations of small fish species would be unchanged

• shark attacks could increase

• there are no significant consequences.

Increased rain in the North Atlantic, along with melting of the land-based glaciers, may alter the oceans by irreversibly disrupting...

• animal breeding grounds

• polar bear hunting areas

• bird migratory routes

• ocean current conveyor belts

• ocean fishing grounds

the greenhouse effect is best described as.

• consensus science

• pioneer species

• fantasy

• a convention of florists

• Junk science

The oceans absorb between 25-30% of the C02 in the lower atmosphere. As the oceans heat up, this absorption . . .

• increases

• increases exponentially

• stays stable

• decreases

The following is an example of a well-managed and sustainable fishery

• the cod fishery off newfoundland

• the octopus fishery off Morocco

• the salmon fishery off Alaska

• the tuna fishery in the Atlantic

• The shark fishery internationally