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23 Cards in this Set

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What are the three rules that define a wetland?
groundwater-at surface or within the soil root zone during all or part of the growing season
- soils- frequent and prolonged saturation or water "hydric soils", low oxygen, little iron
- vegetation- hydrohytes-plants that are adapted to growing in stnding water or saturated soils
Where are wetlands found?
-all continents except Anarctica
- in every climate from tropics to tundra
- make up 6% of earth's land surface
What are some functions of wetlands
- one of richest habitats on earth
- provide flood control and protection
- wetlands improve water quality
- provide shoreline erosion control
-recharge groundwater
-provide natural products
-areas of recreation
Describe the habitat of a wetland
- diverse community
- provides habitat, food and water
- fish, birds, plants
How do wetlands control flooding?
- sponge, retains water and slowly releases it
-slows the speed of runofff
How do wetlands improve water quality
- filter water to remove sediment, wastes and nutrients
How do wetlands provide shoreline erosion control?
- buffer shores from erosion
- roots strengthen the sediment by binding soil to roots
By collecting rain water, snow melt and surf run off, the wetland is
recharging groundwater
what type of natural products do wetlands provide?
fish, shellfish, berries, and rice,
What type of recreational activities do wetlands provide?
boating, fishing, hunting
Hydrology influences the stucture of a wetland by
physically by the movement of the water and the water's chemistry
hydroperiod
the duration, frequency, depth and season of flooding
how does the hydrology influence the plant composition
affects germination
survival mortality or various times in life cucles
Explain why wetlands have been called the "kidneys of the landscape'
because wetlands cleanse water, prevent floods, and manage water of the landscape
Explain why wetlands have been called "biological supermarkets"
provide rich and diverse food chain
on what continents can wetlands be found? In what climates?
every contintent except Anarctica
Approximately how much of the world is covered by wetlands?
6% of the earth's surace
Describe two ancient cultures that used wetlands
babylonians, egyptians, aztec, irish, russians
List 4 cities that have destroyed wetlands in the US?
Boston, New Orleans, NY, Chicago
What are "wetlanders"? Give 3 examples
people who live close to wetlands and whose culture is tied to them. The Camarguis, Cajuns, and the marsh arabs
Explain the economical significance of the following wetlands
bogs
paddies
peatlands
mangroves
salt marshes
bogs- cranberries
paddies- feed half the world
peatlands- mined and used as a source of energy
mangroves- timber food, tammin
- salt marshes- grazing, have production, fences
Give 3 examples of how wetlands have been perceived in a negative mannner
viewed as wasteful
depicted as hell
have monsters
Why are wetlands a misunderstood ecosystem to many people
because they are dark, mysterious, and hard to study