Term
|
Definition
| a disease that mosquitos carry |
|
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Term
|
Definition
| caused sleeping sickness in Equatorial Africa |
|
|
Term
| Grape phylloxera/Daktulosphaira vitifoliae |
|
Definition
| a pest of commercial grapevines worldwide |
|
|
Term
|
Definition
| a pest outside its native Scandinavia |
|
|
Term
|
Definition
| Based on human purposes and perceptions. A pest is anthropogenic. |
|
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Term
|
Definition
| valued as food for honeybees and as a wildflower, even though it can poison livestock. This is an example of a pest that is beneficial in one setting but harmful in another. |
|
|
Term
|
Definition
integrated pest management. Uses all suitable methods to get rid of pests. Their recommended procedure:
discover pest
evaluate pest ID status - what is the danger?
determine available control strategies
use least toxic - at least initially
evaluate success - repeat or try new technique only if necessary
|
|
|
Term
| Two basic philosophies of pest control |
|
Definition
| Chemical techniques and ecological techniques |
|
|
Term
| Chemical techniques to pest control |
|
Definition
| chemicals used to kill large numbers. Gives short term protection |
|
|
Term
| Ecological techniques to pest control |
|
Definition
| seeks long-lasting protection by exploiting pest biology. Either highly specific for pest or manipulate aspects of the ecosystem. |
|
|
Term
| Benefits of chemical pesticides |
|
Definition
1.) works faster than other pest-control methods
2.) increased food production
3.) save lives - DDT is the best control method for malaria
|
|
|
Term
|
Definition
| after spraying pesticides, the pest population rebounds in an even higher number than before. This is often due to reduction of the natural enemies. |
|
|
Term
|
Definition
| outbreaks of another species' population that were not previously a problem. Often due to suppression of superior competitor. |
|
|
Term
|
Definition
| Pest Problems --> Use of Chemical pest --> increased resistance/resurgence --> more pest problems --> more chemical pesticides --> more resistance and resurgance --> more pest problems, etc. |
|
|
Term
|
Definition
| chemicals applied to farm fields, orchards, and lawns end up in the runoff that enters soil, ground and surface waters. |
|
|
Term
| benefits to synthetic pesticides |
|
Definition
| breakdown more quickly and less broadly toxic |
|
|
Term
| benefits of mixing up pesticides used |
|
Definition
less pesticide resistance expected.
Fewer pesticide applications
employ synthetics less frequently |
|
|
Term
| Non-chemical alternatives to pest control |
|
Definition
encourage or import natural enemies of pests
develop genetically resistant plants
cultural practices
sex-pheromone baited traps
IPM |
|
|
Term
|
Definition
| doing a cost/benefit analysis. when the cost of damage outweighs cost of applying pesticides or other control. |
|
|
Term
|
Definition
high dosages can lead to radiation sickness, death
lower dosages can cause DNA mutations, cancer(tumors) |
|
|
Term
|
Definition
| the time for half the radioactive substance to decay. All radioactive isotopes decay to safe level after 10 half-lives |
|
|
Term
|
Definition
| how long it takes for fission waste to lost 97% of their radioactivity |
|
|
Term
|
Definition
| storage of long-term waste |
|
|
Term
|
Definition
| the mentality of "not in my backyard" |
|
|
Term
|
Definition
partial core meltdown, release of radioactive gases. It was a human/equipment failure and flawed design. There were no injuries/death
|
|
|
Term
|
Definition
They disabled safety system and the explosion resulted in reactor meltdown
core meltdown
steam explosion
release of radioactivity
deats of radiation sickness/radiation exposure
There was a political fallout and nuclear power became unpopular |
|
|
Term
| Benefits to nuclear power |
|
Definition
only viable option for replacing a major portion of FF energy
a large supply of fuel
with breeder reactors, US can have plenty of energy for some billions of years
less environmentally harmful |
|
|
Term
|
Definition
| Due to earthquake and loss of emergency power rendered the coolant systen inoperative. Partial core meltdown, release of radioactive gases |
|
|
Term
|
Definition
Solar heating
sunlight to electricty |
|
|
Term
|
Definition
through water, which is a flat-plate collector and can adapt for cooler climates.
through space - the building acts as collector, landscaping to shade |
|
|
Term
|
Definition
| sunlight shines on, and produces electricity current |
|
|
Term
|
Definition
| cost effective. The curved reflector focuses sunlight on and heats water or oil in pipe. Heat used to boil water and generate steam for driving a conventional turbogenerator. It converts about 22% of incoming sunlight to electrical power |
|
|
Term
|
Definition
| wind power. Water power/hydropower |
|
|
Term
| Non-solar renewables/alternative |
|
Definition
geothermal.
Tidal and wave power.
Nuclear fusion |
|
|
Term
| Water as a solar heating system |
|
Definition
collector converts solar radiation into heat. Liquid passing through heated collector heats up, exits to storage tank
convection currents that replenish cool water from tank can be assisted with pumps |
|
|
Term
| Space as a solar heating systems |
|
Definition
| built-in collector intercepts sunlight. Air passing through collector gets heated, then exits into interior space |
|
|
Term
|
Definition
| Directional wind motion converted into rotational motion, and thence into electrical energy |
|
|
Term
|
Definition
| water power drives turbine |
|
|
Term
| Other ideas for non-solar energy |
|
Definition
|
|
Term
| Disadvantages to Solar Energy |
|
Definition
Limited availability
not reliable sources
total supply will only meet a fraction of current energy demand
not without negative environmental effects
requires more research and feasility studies |
|
|
Term
| Advantages to Solar Energy |
|
Definition
clean, sustainable sources of heat, electricity
can help reduce demand for FFs |
|
|
Term
|
Definition
Local, on-demand generation of electricity
high efficiency, small size, low emissions
the fuel is commonly generated by electrolysis of water |
|
|
Term
|
Definition
| an energy-requiring process. More energy is consumed in the generation of H2 fuel than is released as electricity in the fuel cell. |
|
|
Term
|
Definition
Low radiation risk
development costs are high
plentiful |
|
|
Term
| Municipal Solid Waste(MSW) |
|
Definition
| all the materials thrown away from homes and commericial establishments and collected. Has grown from 54.62 million in 1960 to 181.14 million today |
|
|
Term
| Categories of materials in MSW |
|
Definition
Organic
Petroleum
Compostable
Recyclable |
|
|
Term
|
Definition
| paper, yard, food, plastics, wood, rubber |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| glass, plastic, metal, paper |
|
|
Term
| The second principle of ecosystem sustainability |
|
Definition
1.) material waste production should be reduced
2.) waste materials should be reused |
|
|
Term
|
Definition
requires change in behavior
lack of sorting standards
supply: more expensive
demand: no one wants to pay more |
|
|
Term
|
Definition
landfills
incinerations
waste to energy(WTE) facilites
composting |
|
|
Term
|
Definition
handles large volumes
source of revenue
relatively simple procedure
minimal air pollution |
|
|
Term
| Disadvantages to landfills |
|
Definition
sanitary concerns
leachate generation
methane production
incomplete combustion
settling
difficult to site |
|
|
Term
| Reducing landfill problems |
|
Definition
add water to speed composition
water protection features
continual monitoring |
|
|
Term
| Water protection features |
|
Definition
cover daily contributions of MSW
Add liners and leachate recovery systems
site landfills away from groundwater recharge areas
|
|
|
Term
|
Definition
noncombustible materials sorted out: metals recovery feasible
combustible materials incinerated
80% of weight and volume reduction
toxic chemicals are concentraed |
|
|
Term
|
Definition
|
|
Term
| Advantages to WTE facilites |
|
Definition
energy source
reduces pollutants in landfills
resource recovery |
|
|
Term
| 1854 London Cholera Outbreak |
|
Definition
616 died
disease started in the public water pumps
suspected linkage to a single water pump |
|
|
Term
|
Definition
| specific points of output: sewage pipe |
|
|
Term
|
Definition
| come from broader geographic areas. Agricultural fields, city streets |
|
|
Term
| Types of Water Pollutants |
|
Definition
water-borne pathogens
bulk materials
"chemical pollutants |
|
|
Term
|
Definition
bateria, viruses, parasites
80% of all diseases worldwide
combat it by water purification and education |
|
|
Term
|
Definition
these are inorganic soil particles. They reduce light penetration and cause of loss of hiding and resting places
To prevent you can install sedimentary ponds |
|
|
Term
|
Definition
Organic waste. Point source injection of organic wastes into streams may cause an "oxygen sag"
to combat, we should pretreat human waste |
|
|
Term
|
Definition
| when there is less oxygen and not enough to support the organisms |
|
|
Term
|
Definition
|
|
Term
|
Definition
| when something is limiting the growth of plants |
|
|
Term
|
Definition
| the addition of natural substances, such as nitrates or phosphates |
|
|
Term
| Negative effects of nutrient enrichment |
|
Definition
| allows for rapid growth of phytoplankton, which leads to increased turbidity and decreased light. When phytoplankton surges and dies off, more oxygen is consumed, which causes more die-offs |
|
|
Term
| Combatting Eutrophication |
|
Definition
chemical treatments - herbicides can kill of excess plants
aeration - can re-oxygenate the water
harvesting aquatic weeds - improves water quality
prevent harmful inputs - nutrients and sediments
watershed
limit nitrogen and phosphorus
control the point and non point sources
|
|
|
Term
| Chemicals: Inorganics and Synthetics |
|
Definition
road salts, acids, heavy metals
these interfere with cellular processes
not easily broken down |
|
|
Term
|
Definition
| converts organic waste into fertilizer |
|
|
Term
|
Definition
saves landfill space
more complete decomposition than landfill
creates great fertilizer |
|
|
Term
| Disadvantages to composting |
|
Definition
| requires a change in behavior |
|
|
Term
|
Definition
NIMBY - not in my backyard
LULU - local unwanted land use
NIMTOO - not in my term of office |
|
|
Term
| signs that earth is getting warmer |
|
Definition
since 1900, 1.5 degree increase
between 1960 and 2005, glacier ice volume has decreased
sea level rise, in last 15 years, there has been 3.4 mm/year
earlier spring onset |
|
|
Term
|
Definition
Anthropogenic greenhouse warming
due to the belief that greenhouse warming comes from various greenhouse gases in the atmosphere
97% of climate scientists are AGW proponents |
|
|
Term
| Climate model predictions |
|
Definition
used to predict future global temperatures
must represent the climate system well enough to be able to make precise predictions
|
|
|
Term
|
Definition
| catastrophic anthropogenic greenhouse warming |
|
|
Term
|
Definition
| lowest layer in the atmosphere. Gases are responsible for moderating flow of energy to earth |
|
|
Term
|
Definition
|
|
Term
|
Definition
| above tropopause, temperature increases with altitude |
|
|
Term
| Mesosphere and Thermosphere |
|
Definition
| ozone concentration declines |
|
|
Term
|
Definition
| result of long-term weather patterns in a region |
|
|
Term
|
Definition
| responsible for day to day changes in the weather |
|
|
Term
|
Definition
| they are a heat blanket, insulating Earth and delaying the loss of infrared energy to space |
|
|
Term
|
Definition
| most abundant greenhouse gas, absorbs infrared energy |
|
|
Term
|
Definition
| Goal of stabilizing greenhouse gas levels in the atmosphere, starting by reducing greenhouse gas emissions |
|
|
Term
|
Definition
| direct products of combustion and evaporation |
|
|
Term
|
Definition
| produced from reactions of primary pollutants |
|
|
Term
|
Definition
| pollutant correlated with cancer |
|
|
Term
|
Definition
| identifying pollutants and setting standards that should be met to protect human health |
|
|
Term
|
Definition
| process of converting the natural world to the manufacturing world |
|
|
Term
|
Definition
Recognition
formulation
Implementation
Control |
|
|
Term
|
Definition
| affect quality of life and environment in numerous ways. Depletion of energy resources, air pollution, water pollution, etc. |
|
|
Term
|
Definition
| the collection of all plants and animal species, their genetic makeup and the communities/landscapes in which they are found |
|
|
Term
|
Definition
|
|
Term
|
Definition
| Humans have been the cause of 820 extinctions. 726 animals and 90 plants, many of which were on oceanic islands |
|
|
Term
|
Definition
| maintains a red list of all species threatened with extinction. Use a decision tree to categorize each species |
|
|
Term
|
Definition
| population counts or estimates below the critical number. Included are critically endangered(CE), endangered(EN), and vulnerable(VU) |
|
|
Term
|
Definition
small initial population(hence the oceanic island endemic)
reduction in numbers due to changes in the environment |
|
|
Term
| Changes in enviroment that could cause extinction |
|
Definition
physical habitat alteration(land conversion, fragmentation, simplification, intrusion)
exotic species
overexploitation
pollution
climate changes |
|
|
Term
| the 3 components of sustainability |
|
Definition
|
|
Term
| Goal of our relationship to the environmen |
|
Definition
|
|
Term
|
Definition
| extracting or harvesting products at a rate that doesn't diminish ability of sytem to produce product |
|
|
Term
| Unsustainability consequences |
|
Definition
| Blue Whale was almost extinct. 99% was killed |
|
|
Term
| 4 basic categories of environmental problems |
|
Definition
population growth
decline of ecosystem
global atmosphereic changes
loss of biodiversity |
|
|
Term
|
Definition
| Had Secular Land Ethic. He was an early 20th century forrester, hunter. Wrote A Sand County Almanac. He thought like a mountain. A common experience among many prominent environmentalists. Satisfaction |
|
|
Term
|
Definition
| the expectation to be satisfied is derived from extensive knowledge or thrilling experiences |
|
|
Term
|
Definition
| The great failure of modern environmental ethics has been a failure to establish the value of creation. |
|
|
Term
| meaning of good in Gensis 1 |
|
Definition
| an indication that the created thing does what it is designed to do. |
|
|
Term
|
Definition
1) intrinsic value
2) instrumental value
3) spiritual truths |
|
|
Term
|
Definition
| a steward is gifted with a position in charge of someone else's property. A steward can use master's property, acording to master's wishes, but ultimate ownership is the master's |
|
|
Term
|
Definition
| a way of gaining knowledge. a process or method that brings order out of chaos |
|
|
Term
|
Definition
| creates a logical system whereby information can be organized and understood |
|
|
Term
| Assumptions of scientific method |
|
Definition
our senses perceive objective reality
objective reality functions according to basic principles
every observable result has a cause, every result causes more results
human powers of observation and laws can discover the Creation's basic principles and laws |
|
|
Term
|
Definition
| if the idea explains many otherwise unconnected observations |
|
|
Term
|
Definition
| becomes so well accepted that it is unquestioned |
|
|
Term
|
Definition
| sound science has given us an understanding of how living systems work |
|
|
Term
| downside of sound science |
|
Definition
| sound science has given us more destructive capacity |
|
|
Term
| What provides the understanding of environmental relationships |
|
Definition
|
|
Term
|
Definition
relatively new branch of biological science. Considers organisms in their context. Tests hypothesis about why a species is where it is, what it does there, what its impact is, etc |
|
|
Term
|
Definition
Population
Community
Ecosystem
Biosphere |
|
|
Term
|
Definition
| part that is developed is ruined by storms that damage property, eroded beaches. Undeveloped part is a healthy community |
|
|
Term
|
Definition
the assemblage of living organisms in an area
Plant portion, animal portion, microbial portion |
|
|
Term
|
Definition
| non living physical and chemical: helps to determine biotic |
|
|
Term
|
Definition
adapted by species to survive changes: e.g. temperature.
In sum, populations are adopted to each other and the abiotic environment |
|
|
Term
|
Definition
| a grouping of plants, animals and microbes occupying an area and interacting with each other and their non-living environment. In short, an ecosystem is a biological community and abiotic factors |
|
|
Term
| 2 things that ecosystem ecologists focus on |
|
Definition
|
|
Term
|
Definition
1.) ecosystems are models of sustainability
2.) better management of critical resources
3.) greater appreciation |
|
|
Term
| Structure of an ecosystem |
|
Definition
| the parts and how they fit together to make a whole system |
|
|
Term
|
Definition
| why the parts are, and why they fit together way they do |
|
|
Term
|
Definition
where the predator benefits, while the prey species is harmed. example is herbivory |
|
|
Term
|
Definition
| Many relationships both species. Two species perform tasks for each other and reap rewards as a result. Examples: birds eating berries |
|
|
Term
|
Definition
| two or more species attempt to harvest the same resource. |
|
|
Term
| Direct competition example |
|
Definition
| lions and hyenas fighting |
|
|
Term
| examples of indirect competition |
|
Definition
| lions and hyenas hunting zebras or trees reaching up for sunlights |
|
|
Term
| 2 central ecosystem facts |
|
Definition
energy is constantly lost from ecossytems as organisms grow, reproduce, move, etc
nutrients are in finite supply |
|
|
Term
| solution to lost energy and nutrients |
|
Definition
| ecosystems accumulate energy and nutrients to survive lost energy that needs to be replaced and organisms that compete for the nutrients in shortest supply |
|
|
Term
| 3 trophic categories/feeding groups of ecosystems |
|
Definition
1. Producers
2. Consumers
3. detritivores and decomposers |
|
|
Term
|
Definition
| also called autotrophs. They make their own food and capture sunlight energy from photosynthesis |
|
|
Term
|
Definition
| any group that is not a producer. Includes consumers and detritivores and decomposers. They are dependent on producers to maintain supply of energy and keep nutrients cycling |
|
|
Term
|
Definition
| Primary consumers, secondary consumers, omnivores |
|
|
Term
|
Definition
| feed on producers. Herbivores, includes leafhoppers, some mites, zebras |
|
|
Term
|
Definition
| Consumers that feed on primary consumers. carnivores. INcludes praying mantises, beetles, lions |
|
|
Term
|
Definition
|
|
Term
| detritivores and decomposers |
|
Definition
| detritivores feed on dead pant/animal matter Leaves, branches, feces, animal carcasses |
|
|
Term
|
Definition
| descriptions of who eats whom |
|
|
Term
|
Definition
| interweaving food chains that describe all the feeding relationships in a community or ecosystem |
|
|
Term
|
Definition
| the mass of all the organic matter found in living things. arranged in a pyramid by their trophic level. |
|
|
Term
|
Definition
| the little energy that is transferred up the trophic levels. the lower levels usually have a larger overall energy budget and contain larger biomass |
|
|
Term
| 1st law of thermodynamics |
|
Definition
| energy is neither created or destroyed, but it can change from form to another. |
|
|
Term
| 2nd law of thermodynamics |
|
Definition
| when energy is changed from one form to another, some higher quality energy is degraded into lower quality energy. Useful energy is gradually lost to the system as heat |
|
|
Term
|
Definition
| the means of converting sunlight energy into chemical energy. energy flows through ecosystems |
|
|
Term
| first basic principle of ecosystem sustainability |
|
Definition
| ecosystems use sunlight as their source of energy |
|
|
Term
| Characteristics of sunlight |
|
Definition
1) inexhaustible
2) consumption doesn't reduce production
3) consumption produces no wastes |
|
|
Term
| Law of conservation of Matter |
|
Definition
| no atoms are created, destroyed or altered in any way. They change form by undergoing chemical reactions |
|
|
Term
|
Definition
| nitrogen, carbon, hydrogen, oxygen, phosphorus, sulfur(NCHOPS) |
|
|
Term
|
Definition
| lipids, proteins, carbohydrates, nucleic acids |
|
|
Term
| Second prinicple of ecosystem sustainability |
|
Definition
| ecosystems dispose of wastes and replenish nutrients by recycling all elements |
|
|
Term
|
Definition
| when populations reach maximum their environment can support. examples of this were the moose that overate their food, and wolves who preyed on moose, so it kept the ecosystem in balance |
|
|
Term
|
Definition
| when predators do not keep herbivores in check, and plants are consumed faster than they can reproduce |
|
|
Term
| 3rd basic principle of ecosystem sustainability |
|
Definition
| the size of the herbivore population is controlled so that overgrazing does not occur |
|
|
Term
|
Definition
| when a prey population has multiple predators |
|
|
Term
|
Definition
fire
floods
windstorm
droughts
the sound of a tree falling in a forest
mowing the grass |
|
|
Term
|
Definition
| prest outbreak. Exotic species often become pests |
|
|
Term
|
Definition
| transition between biotic communities. each community prepares the area for the next community |
|
|
Term
|
Definition
| primary(no previous biotic community), secondary(previously occupied by a community), aquatic(transition from pond or lake to terristrial community) |
|
|
Term
|
Definition
| best colonizers, poorest competitors |
|
|
Term
|
Definition
| poorest colonizers, best competitors |
|
|
Term
|
Definition
| sometimes ecosystems are actually maintained this way. in grasslands, need fires or trees will invade. |
|
|
Term
| 4th principle of ecosystem sustainability |
|
Definition
| ecosystems show resilience when subject to disturbance |
|
|
Term
| 5th basic principle of ecosystem sustainability |
|
Definition
| ecosystems depend on biodiversity |
|
|
Term
|
Definition
I=environmental impact
P=population size
A=affluence
T=technology |
|
|
Term
| attempts to solve population growth |
|
Definition
land ownership reforms
intensification of agricultural cultivation
expansion of agriculture
boosting of family income through illicit activites
emigration
migration to cities |
|
|
Term
|
Definition
| 4 phases. Part 4 is characterized by stable population sizes. The transition is essential for sustainability. First phase has rapid growth and then it stabilizes out by the fourth phase. improved standards of living the futher along in the DT you are |
|
|
Term
|
Definition
| argues that rapid population growth undermines economic growth. |
|
|
Term
| two options for focused action for developing nations |
|
Definition
1) speed up economic development
2) reduce population growth |
|
|
Term
|
Definition
| developing countries borrow in increasing amounts |
|
|
Term
|
Definition
| International Conference on Population and Development. all nations agreed that population growth is an issue of crisis proportions and that it must be confronted forthrightly in favor of option 2 |
|
|
Term
|
Definition
poverty - overusing resources for survival
environmental degradation - more "little hands" needed to help the family in a depleted environment. Illiteracy. Lack of contraceptives
High Fertility - dwindling resources divided among more people. |
|
|
Term
| New stipulation of World Bank and Development |
|
Definition
| loan to poor countries if they promise to improve their environment and work toward reducing poverty |
|
|
Term
| 4 main processes of hydrologic cycle |
|
Definition
evaporation
condensation
precipitation
gravitational flow |
|
|
Term
| 3 loops of the hydrologic cycle |
|
Definition
evapo-transpiration
surface runoff
groundwater |
|
|
Term
| a functioning hydrologic cycle |
|
Definition
replenishes freshwater supplies
removes impurification |
|
|
Term
|
Definition
| process in which liquid water molecules vaporize and enter atmosphere |
|
|
Term
|
Definition
|
|
Term
|
Definition
| when water molecules rejoin via hydrogen bonding to form a liquid. dew, fog, clouds |
|
|
Term
|
Definition
| rising warm air encounters lower atmospheric pressure, it expands and cools and humidity increases |
|
|
Term
|
Definition
| descending air is compressed by higher air pressure in teh lower atmosphere - lowered relative humidity |
|
|
Term
|
Definition
| largely influence the distributions of precipitation across the earth |
|
|
Term
|
Definition
| generates global convection patterns |
|
|
Term
|
Definition
| leads to tropical rainforests and surrounding dry areas |
|
|
Term
|
Definition
occurs on mountain ranges
effects due to adiabatic cooling/warming |
|
|
Term
|
Definition
| runoff and watersheds, infiltration(capillary water). These are influecned by slope, angle, soil permeability |
|
|
Term
|
Definition
| purification step, aquifiers, seeps into springs. Groundwater breeches surface |
|
|
Term
|
Definition
| layers of porous material through which groundwater moves. Holds 99% of freshwater |
|
|
Term
|
Definition
|
|
Term
| Benefits of Modern Water Mangement |
|
Definition
decrease in water born diseases
development of undesirable land
growth of 40% of the world's food via modern irrigation/agriculture
electricity generation via hydropower |
|
|
Term
| impacts of the water cycle on the environment |
|
Definition
changes to the surface of the Earth
withdrawal of water supplies
atmospheric pollution
climate change |
|
|
Term
|
Definition
|
|
Term
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Definition
| discovered the germ theory of diseases |
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Term
| population growth because... |
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Definition
vaccines and antibiotics developed
nutrition improvement
sanitary practices regarding water and wastes were implemented |
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Term
| population growth today is... |
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Definition
| declining. soon the world population will reach an equilibrium. predicted to be 9.5 billion in 2050 |
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Term
| TFR(total fertility rate) |
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Definition
| average # of children each woman bears over her lifetime. A TFR of 2.0 yields a stable population. |
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Term
| Negative impacts of altering surface water |
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Definition
altering the ecology
loss of species-rich wetlands
impounded water(dam water) is so massive that it can cause geologic shifts |
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Term
| Consequences of groundwater depletion |
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Definition
falling water tables
diminsment of surface water
saltwater intrusion |
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Term
| Water management challenges |
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Definition
| increasing freshwater supplies by capturing more runoff, increasing withdrawal from aquifiers, desalination of saltwater |
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Term
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Definition
biological breakdown of organic material to humus
bioturbation and mixing with inorganic particles |
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Term
| requirement in healthy soil |
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Definition
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Term
What removes nutrients from soil? |
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Definition
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Term
| What adds nutrients back into soil? |
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Definition
| dead plant decomposition, bacteria and lightning, weathering of rocks or deposition of sediments |
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Term
| 2 types of disturbances to components of soil ecosystem |
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Definition
chemical disturbances - poisons can harm soil organisms
mechanical disturbances - can disrupt soil profile |
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Term
| replenish lost nutrients to soil by... |
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Definition
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Term
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Definition
| reduces water and wind erosion. The process of making rows of plants |
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Term
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Definition
| reduces water and wind erosion by creating rows on sloped lands |
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Term
| practical rules of sustainable agriculture |
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Definition
cover the soil
minial or zero tillage
apply mulch
maximize biodiversity |
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