Explain the response of Canadian cod populations in the area of the Grand Banks after the 1992 moratorium on cod fishing
What will be an ideal response?
Cod populations did not immediately rebound after the initial moratorium, so in 1994, the Canadian government extended the moratorium. Meanwhile, populations of capelin (a fish that is normally preyed upon by cod) grew rapidly and began preying upon young cod. After cod populations did not rebound by 2003, the Canadian government extended the moratorium indefinitely. A portion of the Grand Banks was reopened for cod fishing in 2009 upon evidence of a slight recovery in cod numbers. A 2011 study showed that cod populations had climbed to 35% of their historic numbers (up from 5%). The rebound is attributed to the moratorium and the fact that capelin population numbers had crashed as a result of the combination of outstripping their food supply and being fished by fishermen.
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Which of the following is not true regarding the oxides of sulfur and nitrogen
A) They lead to the formation of airborne sulfuric and nitric acid. B) They are produced by industry and transportation. C) They are causing major environmental problems in Europe and Asia. D) They are naturally occurring and, therefore, not considered pollutants.
_____ volume of open spaces in rock or soil
Fill in the blank(s) with the appropriate word.
Orographic lifting produces the world's highest precipitation amounts and averages
Indicate whether the statement is true or false
The theory that the continents have moved in the past and are currently moving is
a. continental zone. b. continental drip. c. continental drift. d. continentality. e. the continents are not moving.