11 Jun Studies indicate that acidification of the ocean
Question
Studies indicate that acidification of the ocean by the absorption of carbon dioxide is harmful to virtually all marine life and ecosystems. The group most vulnerable to both warming and acidification would be the _________.
pelagic fishes
benthic crustaceans
marine mammals
krill and other zooplankton
reef corals and other calcareous organisms
Which of the following statements about the iron hypothesis are true? Choose all that apply.
Phytoplankton populations declined when iron was added to the ocean.
Adding iron to the ocean removes carbon dioxide from the atmosphere.
Plankton must die and sink to the sea floor for this to reduce global warming.
Iron is a limiting nutrient in some regions of the ocean.
Adding iron to the ocean might cause an ecological disaster in the ocean.
Which of the following statements about marine fisheries is/are true? Choose all that apply.
In U.S. waters, 80% of commercial marine fish stocks are fully exploited or overfished.
The world’s total marine fish catch continues to increase year after year.
The marine fishing industry has developed new high-tech methods that have virtually eliminated bycatch.
Based on current practices, it is predicted that marine fish stocks will be depleted by 2048.
Fishing practices have removed 90% of large marine predatory fish species.
The largest proportion of marine fish stocks are harvested from open ocean waters.
Of the following statements about feeding strategies, which is/are true? Choose all that apply.
Suspension feeding involves filtering plankton from seawater.
Carnivorous feeding involves either passive or active predation.
Deposit feeders include worms that ingest sediment that is coated with organic matter.
Carnivorous feeding involves organisms directly capturing and eating other animals.
Filter feeders are strict herbivores.
Which of the following statements about oceanic productivity in polar regions is/are true? Choose all that apply.
In polar oceans, productivity is limited by the lack of sunlight in the winter.
Polar oceans typically display a strong, permanent thermocline.
In polar oceans, there is incredibly high productivity in the summertime.
In polar oceans, nutrient concentrations are usually adequate and do not limit productivity.
In polar oceans, productivity is high year-round.
Which of the following statements about oceanic productivity is/are true? Choose all that apply.
In temperate oceans, the fall bloom is limited by the lack of nutrients.
In temperate oceans, the spring bloom is limited by the lack of nutrients.
In tropical oceans, productivity is limited year-round by the lack of nutrients.
In temperate oceans, the fall bloom is limited by the lack of sunlight.
In temperate oceans, the spring bloom is limited by the lack of sunlight.
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