Based upon what we are learning about the lionfish diet, what is most likely going to happen to Caribbean coral reefs invaded by lion fish?
a. Lionfish diets are specific to just a few species of clams. These clams may go extinct in the coral reefs where lionfish have invaded.
b. There will be fewer algae eating fish. More algae will grow over and damage corals.
c. The alga populations growing on and near the reef will be greatly reduced, increasing the growth of corals.
d. As lionfish stir up the bottom sediments searching for food, the water will be increasingly cloudy. Cloudy water will hurt the growth of algae and corals growing in the reef.
Answer: b. There will be fewer algae eating fish. More algae will grow over and damage corals.
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What happens to the water table if groundwater is pumped out faster than it can be replaced?
A. The pipe in the well subsides down into the ground and can disappear. B. A cone of depression forms on the water table. C. A mound of groundwater forms over the well. D. All of these.
Historically, which of the following considerations in setting standards for toxic exposure has been emphasized the least?
A. Different members of the population have different sensitivities to toxins B. Individuals in the human population have been exposed to many different kinds of toxins that may have additive or synergistic effects C. Including information about how toxins affect natural ecological systems D. Including information about both chronic and acute exposures to a toxin E. All of these considerations have been used and are important in setting policy
Which of the following is not responsible for the slow recovery of ecosystems from desertification?
a. slight rainfall b. low species diversity c. little soil bacterial activity d. slow plant growth rates e. frequent flash floods
Globally, the world's ratio of reserves to annual production for oil, gas, and coal are currently:
A) 51, 57, and 125 years respectively B) 11, 17, and 75 years respectively C) 125, 154, and 51 years respectively D) 51, 125, and 57 years respectively E) 125, 51, and 57 years respectively