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ecology of a constructed wetland
Terms in this set (13)
are intermediate between terrestrial and aquatic ecosystems containing soil saturated with water, either permanently or periodically
are a type of wetland where fresh and salt water meet.
wetlands are some of the most productive ecosystems on earth
Here, organisms are specially adapted to the physical conditions associated with wetlands.
wetlands serve as nurseries
for fish, crabs, shrimps, and oysters
plants in wetlands
help filter pollutants from the water and help buffer higher ground from flooding during big storms and hurricanes.
like swamps, bogs and marshes, form in shallow basins or along the banks of rivers or lakes. These wetlands are rich in species diversity, yet despite all of their value and importance, many freshwater ecosystems are being severely damaged by human activities.
the major threats to freshwater biodiversity include
runoff from agricultural and urban areas, invasion of exotic species and creation of dams and water diversions.
many times, natural ecosystems become altered by human use
and degrade to a point where they no longer function
uses ecological principles to develop plans to return degraded
ecosystems to conditions as similar as possible to their natural predegraded state
a key strategy in restoration ecology is
bioremediation, the use of living organisms such as plants, fungi, or bacteria to detoxify polluted ecosystems.
why restore aquatic ecosystems?
Human activities are causing species to disappear at an alarming rate, depriving valuable resources used to provide food, medicines, and industrial materials to human beings. We need healthy water for drinking, fishing (and catching fish that are healthy to eat), swimming, agriculture, industrial and community uses and aesthetic enjoyment. Animals and plants need different types of water environments, but all need healthy water for food sources, hiding places from predators, sufficient oxygen and spawning.
how can we protect our wetlands?
By using natural ecosystem principles, we can construct an wetland ecosystem that will help remove many of these pollutants before they enter the river or lake ecosystem. Properly constructed wetlands can moderate flow extremes and improve water quality. Added benefits include enhanced groundwater recharge, aesthetic appeal, and the creation of wildlife habitats. Constructed wetlands are excavated basins into which wetland vegetation is planted to enhance pollutant removal from stormwater runoff. Stormwater enters a constructed wetland and passes through vegetation which acts to filter organic materials and soluble nutrients and remove some dissolved nutrients. Constructed wetlands can also be designed to reduce peak stormwater flows.
the newly constructed wetland here is designed
specifically to catch and retain the first flush coming off the adjacent parking lots
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