Of all the aquatic biomes on earth, we know the least about the _____.
Where are the most biodiversity found?
_____ provide flood control, climate moderation, and nutrients cycling.
The following are major causes for ______ in aquatic ecosystems: overfishing, habitat destruction, pollution an erosion.
Approximately _____ of the world's original wetlands have been lost to agriculture and coastal development.
____ has the most destructive effects on ocean floor ecosystems.
When fish populations are temporarily reduced due to overfishing, they are said to be _____.
It costs the global fishing industry $125 billion a year to catch _____ worth of fish.
the tragedy of the commons
The depletion of the world's marine fish stocks due to overfishing is a classic example of _____.
In the US, over half of the fish extinctions in the last century were driven to extinction by _____.
TED have saved many turtles from _____.
A treaty banning trade in endangered species.
Whales and porpoises are called _____.
____ has a significant whaling industry and whale meat market.
International Whaling Commision
Under the _____'s ban on whaling, Eskimos are still allowed to harvest whales.
Of the 350 National Biosphere Reserves, _____ include coastal marine habitats.
optimum sustainable yield
_____ is the most beneficial to fish populations when estimating marine fish populations.
Ocean areas beyond any country's legal jurisdiction.
eliminating fish subsides
_____ is one economic approach to reducing overfishing.
A federal permit system for dredging of filling wetlands larger than 3 acres has helped to reduce annual wetland loss by up to _____% over the last 30 years.
The largest wetlands restoration project in the US is in the _____.
US Army Corps of Engineers
The _____ is responsible for undoing the development of the Everglades that the same agency has done since the 1940s.
an ounce of prevention is worth a pound of cure
The lesson of the Florida Everglades destruction and restoration is a classic example of _____.
Rivers are more vulnerable than lakes by contamination of plant nutrients, oil, toxins, and pesticides is a _____ statement.
_____ is considered the single greatest threat to the great lakes.
The Columbia River is located in the _____.
The worlds largest hydroelectric power system is located on the _____.
_____ was introduced into the Great Lakes and has now spread through most of the major river systems in central and eastern U.S.
The dams on the _____ provide jobs, provide flood control, and produce cheap electricity.
Dams and reservoirs may kill _____ salmon, slow down stream _____, expose juvenile salmon to more _____, without _____ prevent upstream migration.
the national wild and scenic rivers act
Under _____ protection can be offered to rivers and river segments with cultural and historic value, wildlife and scenic value, and recreational value.