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50 Cards in this Set

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  • Back
T/F: Water is indispensable to all organisms and is evenly distributed across the earth's surface - both in time and space.
False.
Which major water source discharging into the worlds oceans carries the most soil and sediments?

Amazon River
Antarctic Glaciers
Mississippi River
Yellow River
Antarctic Glaciers
Terrestrial wildlife reacts and adapts to water caused barriers. Which does not fit this category?

Isolation allows speciation
Learned swimming behavior
Rafting
Use ice
Learned swimming behavior
The northern prairie potholes refer to sloughs and ponds usually less than what size?
1 acre
T/F: Chionophiles refers to those species not only adapted to snow, but seek out ice/snow regions.
True.
What percentage of the earth's water is salty?
97.5%
What percentage of the earth's water is in glaciers, etc.?
69%
What percentage of the earth's water is fresh groundwater?
30%
What percentage of the earth's water is i nfreshwater lakes and rivers?
0.3%
What percentage of the earth's freshwater is used for Agriculture?
65%
What percentage of the earth's freshwater is used for Industrial purposes?
25%
What percentage of the earth's freshwater is used for Domestic purposes?
10%
How does Topography affect water?
Land, climatic variables, soils and rock contribute to soil erosion which goes into rivers.
A U-shaped lake water body formed when a wide meander from the mainstem of a river is cut off to create a lake; called Billabongs in Australia.
Oxbow lakes.
A landform created at the mouth of a river where that river flows into an ocean, sea, estuary, lake, or reservoir or another river; formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river.
Deltas.
Seperates the Oriental from teh Australian floral and faunal regions.
Wallace's Line
How can terrestrial wildlife react and adapt to water barriers?
-"Rafting" on vegetational debri.
-Use ice
What 3 things are included as Riparian Zones?
-Riparian ecosystems
-aquatic ecosystems
-wetlands
the interface between land and a stream.
Riparian Zone
More productive in terms of plant and animal species diversity and biomass per unit area than all the rest of teh land base.
Riparian zones
What are Riparian Zones valued for, other than for wildlife and livestock? (3)
-flood control
-water quality, quantity, and timing.
-ecological stabilizing systems
Sloughs and ponds, usually less than one acre taht occur with a pond density of 5 or 6 to more than 100 per sq. mile.
Potholes.
Made by glaciers retreating, and ice chunks would fall off and make the impring, melt, and fill the hole with water; usually form in limestone sink holes.
Potholes.
Associated with the Great Plains praries which has earned the term "Duck Factory."
Potholes.
Refers to a sampling procedure for assessing teh community type and species composition along edges of live water; canprovide a good indication of the general health of the entire watershed.
Green Line Vegetation Composition.
Refers to that specific area where a more or less continuous cover of perennial vegetation is found when moving away from the perennial water source.
the 'Green Line'
Developed to count the number of ponds still available to waterfowl in July; shows the strong relationship of waterfowl to a single habitat factor; used to adjust bag limits.
July Pond Index.
List 5 examples of Hydroseral Wildife.
1. Beaver
2. Moose
3. Waterfowl
4. Shorebirds
5. Neotropical birds.
Mammals and birds who avoid snow and are not adapted to it (adapted to deserts instead).
Chionophobes.
Mammals and birds who are adapted to snow; don't seek out, but if they encounter it are fine.
Chionophores.
Mammals and birds who prefer and seek out snow
Chionophiles.
Give 3 examples of Chionophores.
Deer, coyotes, fox.
Give an example of a Chionophile.
Snow Show Rabbit.
What 3 things does the Reservior effect basically involve?
1. Drying a wetland.
2. Re-floodig it.
3. Enrichment flush.
The dynamic nutrient enrichment of water following impoundment (being confined in an enclosure).
Reservior effect.
The deliberate seasonal or periodic drying of wetlands; takes advantage of the 'reservoir effect' for the enhanced management of wetlands for the benefit of waterfowl and other wildlife.
Drawdown.
Why is the Beaver a keystone species? (4).
It exerts unique positive influences on streams and wetlands such as:
-raised water tables
-upstream sedimentation nitrogen accumulation
-transfer of biomass from terrestrail to aquatic systems
-enhanced quality of water.
How do Beavers effect riparian zones?
They stop sediments in the stream and thus begin the process of succession from a pond to a meadow, etc.
How do Beavers effect waterfowl? (6)
1. Interspersion of cover associated with water.
2. Beneficial composition of cover types.
3. Water depth
4. Amount and types of food resources.
5. Freedom from human disturbances.
6. Proximity of nesting cover to brood habitat.
Why is the Alligator a keystone species? (2)
They perform essential functions that are critical to the survival of other wildlife and plants:
-Gater holes are miniature refuges of fresh water (They clear marsh vegetation and mud from over natural depressions in limestone floors)
-makes levees to prevent river flooding
What are the 2 direct effects of oil on birds?
1. Loss of insulation
2. Ingestion of oil via preening
What indirect effect does oil have on birds? (1 main, 3 subs)
Reproduction reduced.
-ducks that ingested oil stopped laying eggs.
-with lack of insulation, female ducks couldn't incubate eggs
-oil interrupts normal gasious exchange through the eggshell, so the embryo dies.
What are 3 ecoystetm elements that are negatively affected by Acid Rain?
1. Terrestrial flora and fauna killed.
2. Soil pH altered (limestone dissolved)
3. Influences Aqcuatic wildlife.
What 4 ways does Acid Rain influence Aquatic Wildlife?
1. Fish losses dramatic
2. Inhibits sense of smell in salmonids (prevents spawning)
3. High mortality in amphibian embryos.
4. Effects fish-eating birds.
What is an advantage of Guzzlers?
Dependable sources of water.
What is a disadvantage of Guzzlers?
Insufficient amount or dependency.
Africa is in the worse condition and by the year 2010, 400 million Africans will be under ______________.
Water stress.
Area of immediate release of sewage; no oxygen, lots of bacteria.
Zone of Degredation
Occurs downstrean where sludge deposits; anaerobic organisms (Botulism) flourish here
Zone of Active Decomposition
Occurs even further downstream; full range of aquatic life begins again; increase in Dissolved Oxygen and Biological Oxygen Demand; results from stream's ability to reaerate itself.
Zone fo Recovery