Wetlands – Flashcards
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Wetlands help reduce erosion through _______.
a.
nutrient absorption
b.
sediment trapping
c.
bacterial absorption
d.
all of the above
answer
b.
sediment trapping
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Freshwater wetlands can be found _______.
a.
along freshwater lakes
b.
in the lower regions of rivers
c.
in a range of climates
d.
all of the above
answer
d.
all of the above
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How is detritus important to wetland ecosystems?
answer
Detritus is important to wetland ecosystems, because it provides a food source for a variety of aquatic organisms.
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Wetlands occurring in areas with a large amount of trees are most likely _______.
a.
swamps
b.
bogs
c.
marshes
d.
none of the above
answer
a.
swamps
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Which of the following organisms feed on the detritus found in wetlands?
a.
aquatic insects
b.
birds
c.
reptiles
d.
predatory fish
answer
a.
aquatic insects
question
Compare marshes, swamps, and bogs.
answer
Marshes, swamps, and bogs are all types of wetlands. This means that their soil can be saturated either permanently or seasonally. As wetlands, they are all characterized by high levels of biodiversity. Swamps tend to have a larger proportion of surface water than marshes and, in North America, are characterized by the presence of trees. Bogs have acidic groundwater as a result of their surface water resulting mainly from precipitation.
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Explain how peat bogs form.
answer
When the soil is saturated with water, the wood debris that falls to the ground cannot be completely decomposed. The matter that remains eventually becomes a layer of peat.
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Bogs are characterized by _______.
a.
the presence of trees
b.
the presence of herbaceous vegetation
c.
covering a large land area
d.
acidic groundwater
answer
d.
acidic groundwater
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Explain how wetlands contribute to environmental health.
answer
Wetlands play a vital role in the health of the environment. In addition to supporting a variety of organisms, they also reduce water erosion by trapping sediments. Wetlands help clean water by absorbing nutrients that are added to the water supply through agriculture and industry. The high levels of biodiversity allows the bacteria and nutrients added to water to be absorbed by organisms in the wetland ecosystem.
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Explain why wetlands generally have a high level of biodiversity.
answer
Wetlands have a high level of biodiversity because of the amount of resources available. The high levels of accessible water, nutrient levels, and primary productivity allow for a large number and variety of organisms at the base of the food web. This allows the ecosystem to support a variety of higher level organisms as well.
