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Conservation of Natural Resources
Test 2
70
Biology
Undergraduate 2
03/23/2010

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Term
Demography
Definition
The application of population ecology to study of human populations (size, density, distribution ect)
Term
Total fertility rate
Definition
the average number of children born per female.
Term
Replacement fertility
Definition
the total fertility rate that keeps the size of a population stable. For humans its about 2:1
Term
Demographic transition
Definition
a model of economic and cultural change to explain the declining death and birth rates in industrialized nations
Term
Policy
Definition
addressing problems, formulating plans and principles to guide decisions
Term
Environmental Policy
Definition
Policy that pertains to human interactions with the environment
Term
administrative agencies
Definition
4th branch legislation like the EPA that monitors compliance and enforces laws
Term
Proxy indicators
Definition
indirect measures that serve as substitutes for direct measures. Ie- icecaps, ice sheets, glaciers.
Term
Climate models
Definition
combine what we already know into a computer to representations that simulate a climate process through a mathematical process
Term
Mitigation
Definition
pursue actions that reduce greenhouse gas emissions to lessen severity on future climate change
Term
Adaptation
Definition
to accept climate change is happening and pursue strategies to minimize it
Term
Kyoto Protocol
Definition
The goal determined here was to lower emissions to lower than levels of 1990 by the year 2012. Most industrialized nations did not agree.
Term
Geoengineering
Definition
agriculture land reallocated for better energy sources
Term
Smog
Definition
ground level ozone combined with nitrous oxide and catalyzed by the sun
Term
Dams
Definition
obstruction in a river or stream that blocks flow so water can be stored in a reservoir
Term
Bogs
Definition
floating mats of vegetation and are usually acidic
Term
Swamps
Definition
Shallow and forested water.
Term
Freshwater marshes
Definition
shallow water with plants above water
Term
Wetlands
Definition
elements of freshwater and dry land
Term
Eutrophic
Definition
lakes that have high nutrients and low oxygen.
Term
Oligotrophic
Definition
lake that are low nutrients and high oxygen
Term
Profundal zone
Definition
lake zone that is the deep part is where no light penetrates
Term
Benthic zone
Definition
zone that is the bottom of the body, the whole bottom, of a lake or ocean
Term
Limnetic Zone
Definition
lake zone that is the open portion which sunlight penetrates
Term
Littoral zone
Definition
lake zone is the region ringing the edge of body
Term
Lakes
Definition
open standing water
Term
Riparian
Definition
riverside areas.
Term
Floodplain
Definition
fertile areas that a river floods
Term
Watershed
Definition
land drained by a river and tributaries
Term
Tributary
Definition
a large river flowing into a larger body of water.
Term
Desalination
Definition
removes salt from sea water of marginal quantity
Term
Distilling
Definition
when saltwater evaporates then condenses
Term
Reverse osmosis
Definition
forces water through membranes to filter out salt
Term
Point source
Definition
water pollution from discrete locations that is directly polluting ie- factory
Term
Non-point source
Definition
Pollution from multiple sources in a large area
Term
Primary treatments
Definition
physical removal of contaminants from water
Term
Secondary treatment
Definition
Stirring and aeration of water to get rid of aerobic bacteria break down sewage.
Term
Tertiary treatment
Definition
chemical disinfection of water
Term
Intertidal zones
Definition
the area between maximum tide and minimum tide in oceans
Term
Continental shell
Definition
the area under water but still sandy in oceans
Term
Photic Zone
Definition
the layer of oceans that light can penetrate
Term
Aphotic zone
Definition
the area of oceans light cannot penetrate
Term
Pelagic zone
Definition
he free flowing area of an ocean
Term
Upwelling
Definition
the cold, deep water coming up to the surface circulating nutrients
Term
convergence zone
Definition
area in between upwelling areas and are areas of downwelling
Term
Downwelling
Definition
oxygen rich water sinking to the bottom
Term
Hydrothermal vents
Definition
heated water with minerals sprout from the sea floor that organisms use
Term
Kelp
Definition
large brown algae growing from continental shelves
Term
Coral reefs
Definition
a mass of calcium carbonate composed of skeletons of densely packed corals
Term
Mangroves
Definition
tend to be on sandy coasts and are tropical/subtropical.
Term
Estuaries
Definition
where rivers flow into oceans
Term
Methane hydrate
Definition
a potential energy source of sand gravel copper and manganese that we throw our trash in there sometimes
Term
Harmful algal blooms
Definition
large growth of algae that create toxins
Term
Red tides
Definition
algal species that produce red pigments
Term
Soil
Definition
The plant supporting system consisting of rock, organic material, air, gases and nutrients
Term
Weathering
Definition
the physical break down of parent material (rocks) to form soil.
Term
Parent material
Definition
base material for soil formation
Term
Topsoil (A horizon)
Definition
Top layer of soil that has the most nutrients
Term
Leaching
Definition
dissolved particles moving down horizons (layers) of soil
Term
Crop rotation
Definition
alternating the crops grown from one season or year to the next
Term
Contour farming
Definition
plowing furrows perpendicular to it’s slope to prevent gullies
Term
Terracing
Definition
leveling platform cut into hillside making a “staircase”.
Term
Intercropping
Definition
layering different types of crops in alternating bands to increase ground cover
Term
Shelter-belts (windbreaks)
Definition
rows of trees along the edges of farm for crop protections
Term
No-till farming
Definition
uses furrows to plant crops then the furrows are covered harvesting
Term
Fertilizers
Definition
Substance that contains essential nutrients for crop growth
Term
Inorganic fertilizers
Definition
synthetically manufactured mineral suppliments
Term
Organic fertilizers
Definition
are 1. Green manure which is crop residue, or 2. Compost which is produced by decomposition of organic matter
Term
Compost
Definition
decomposition of organic matter to be used for mineral value.
Term
Biological control
Definition
an alternative to pesticides that use natural predators to control pests
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