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Ducks Unlimited_ Ecology.
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Ducks Unlimited_ Ecology.
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Ducks Unlimited: EcologyA damaged oil tanker leaked oil into the Pacific Ocean polluting and depleting the
aquatic habitat and threatening the survival of aquatic animals in the area. If proper
authorities react quickly to clean the area properly, the habitat will be able to recover.
Which type of habitat loss has the area experienced? - ANS-Habitat destruction
A large plot of land in a grassland ecosystem was converted for agriculture. After four
decades of agricultural use the land was abandoned and began to revert to its original
grassland state. This is an example of which of the following? - ANS-Secondary
succession
A volcano has erupted and has now cooled off to leave bare rock. Over time, lichens
have colonized on the rock, breaking it down and creating soil. Soil allowed grasses and
flowering plants to grow. In this example, which of these was most likely the pioneer
species? - ANS-Lichens
A wetland sits in an area with seasonal flooding from snow melt, has anaerobic soil,
contains a build-up of dead vegetation in the water and is filled with cypress trees. This
area is most likely classified as which of the following types of wetland? - ANS-Swamp
After populations of game species began to decline, sportsmen and naturalists pushed
which of the following rules requiring sustainable methods for harvesting game and fish
and ensuring hunters do not have an unfair advantage over the animal? - ANS-Bag
limits
Almost 40 percent of forests in the United States have introduced invasive species due
to the increase of domestic and global travel, trade and commerce. Invasive species
cost hundreds of billions of dollars annually and are responsible for nearly 42 percent of
endangered plant and animal species. - ANS-True
An ecologist is surveying the assemblage of different populations of flora and fauna
inhabiting a dead tree in the middle of a forest. Surveying the tree would be studying
which of the following levels of ecology? - ANS-Biosphere
Approximately $430 million are generated each year from which of the following? -
ANS-Hunting deer
, Because diving ducks have a smaller wing-to-body ratio, they are required to do which
of the following in order to take flight? - ANS-Run across the water to gain speed
Birth and death rates are expressed as the number per _____ individuals per unit of
time. - ANS-1,000
Chemical treatments used to control the growth of invasive exotic plants and promote
growth of desired vegetation is discouraged as a management technique for
grasslands. - ANS-True
Denitrification is an essential step in which of the following cycles? - ANS-Nitrogen
During the first year of life, waterfowl face a _____ percent mortality rate. - ANS-50
Fill in the blank. Marine habitats cover more than ____ percent of the earth's surface. -
ANS-70
Forests are responsible for storing large amounts of carbon. However, there are some
cases in which forests can also release significant amounts of carbon into the
atmosphere. When does this typically occur? - ANS-Trees release carbon when
decaying, so when areas experience deforestation large amounts of a forest's
sequestered carbon will be released back into the atmosphere
Forty percent of the world's oxygen is produced in which of the following? -
ANS-Tropical rainforest
Government programs are set in place in order to reach the national "no-net loss" goal,
designed to reduce or stop wetland loss. One of these programs rewards private
landowners financially for preserving wetlands on their land. Which of the following best
describes the strategy utilized by the program? - ANS-Regulation
Grasslands are dominated by grasses and several species of forbs. Which of the
following best describes a forb? - ANS-Broadleaf plants and lower shrub vegetation
Grasslands are easily converted into agricultural land due to which of the following? -
ANS-Fertile soils
Hannah is monitoring a wetland habitat along the Gulf of Mexico. The water level is
heavily influenced by the tidal patterns affecting the Gulf and is full of soft-stemmed
vegetation, such as grasses and sedges. Although the wetland is next to the Gulf, the
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