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Human Impact on the Environment. extinct. Term used to refer to a species that has died out. If a pesticide was passing through this food chain, which organism would have the greatest concentration of pesticide?. Bird at the top trophic level.

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slide2

extinct

Term used to refer to a species that has died out

If a pesticide was passing

through this food chain,

which organism would have the greatest concentration of pesticide?

Bird at the top trophic

level

slide3
A necessity of life (resource) which can NOT be replenished by natural means;

Ex: fossil fuels

Non-renewable resource

Wearing away of the surface soil by water

and wind

erosion

slide4

monoculture

Farming strategy in which large fields are planted with a single crop variety year after year

a necessity of life (resource) which can

regenerate quickly and that is replaceable;

Ex: trees, water

Renewable resource

slide5
Increasing concentration a harmfulsubstance in organisms at higher trophic levels in a food chain or web

Name the pesticide that

concentrated in fish-eating

birds like eagles and

caused them to lay eggs

with fragile shells

Biological magnification

DDT

slide6
Program in which endangered species are allowed to breed in zoos until numbers increase and then are returned to their natural habitats

Captive breeding

Forests that have never been cut that

provide unique habitats for wildlife

Old growth forests OR “virgin” forests

slide7
Uppermost layer of soil that contains most of the nutrients and is susceptible to erosion

topsoil

Wavelength of sunlight that causes sunburn, skin cancer, and cataracts whichthe ozone layer protects us from

Ultra violet (UV)

slide8
The development of highly productive crop strains and the use of modern agriculture techniques to increase yields of food crops

Green revolution

  • Way of using natural resources without depleting
  • them and of providing for human needs without
  • causing long term harm to the environment

Sustainable development

slide9
A process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land in areas with dry climates into deserts

desertification

A mixture of chemicals (smoke + fog)

that occurs as a gray-brown haze in

the atmosphere

smog

slide10
Harmful material that can enter the biosphere through land, water, or air

pollutant

the sum total of the variety of organisms in

the biosphere; It is a measure of the health

of an ecosystem

biodiversity

slide11
term used to refer to a species that is at risk of becoming endangered

threatened

Splitting of ecosystems into small areas

Habitat fragmentation

slide12
a species whose population size is rapidly declining and will become extinct if the trend continues without intervention

endangered

increasing concentration a harmful

substance in organisms at higher

trophic levels in a food chain or web

Biological magnification

slide13
Plants or animals that have migrated or been introduced into places where they are not native and for which there are no natural predators or parasites to control their population

Invasive species

The wise management of natural resources,

including the preservation of habitats and wildlife

conservation

slide14
Areas containing endangered ecosystems that could benefit most from efforts and $ to preserve them

Hot spots

Atmospheric layer in which ozone (03) gas

is relatively concentrated which protects

us from the sun’s ultra-violet radiation

Ozone layer

slide15
Rain containing nitric and sulfuric acids caused by burning fossil fuels

Acid rain

Increase in the average temperatures of

the Earth

Global warming

slide16
Fuels such as oil, coal, or natural gas produced by the decay of dead organic matter that cause many environmental problems such as global warming and acid rain

Fossil fuels

Illegal hunting of animals

poaching

slide17
Zebra mussels and leafy spurge in South Dakota and rabbits in Australia are examples of what environmental problem

Invasive species

Tell two modern agricultural methods

that are helping to preserve the

environment

Satellite/GPS imaging, no-till, crop rotation, contour plowing, controlled grazing, cover crops, biological pest control

slide18
Governmental body whose job it is to monitor and enforce environmental regulations, provide education on environmental issues, conduct environmental research, and provide funding for environmental programs

Environmental Protection Agency(EPA)

Agreement signed by almost 200 countries,

including the United States, which agreed to reduce

(and eventually stop) the use of ozone depleting

chemicals.

Montreal Protocol

slide19
The giant aquifer that supplies water for drinking and agricultural irrigation to much of the farming midwest

Ogallala

Act passed to protect endangered species that

prevents importation into the United States of

anything that comes from an endangered animal

Convention on International Trade inEndangered Species (CITES) Act

slide20
Agreement, aimed at reducing global warming, which has been ratified by 104 nations that asks participants to reduce by 2012 their greenhouse gas emissions to a percentage of their 1990 emission levels. (The President Bush has questioned some of the details of the treaty and the US has not ratified it)

Kyoto Accord

Chemicals containing chlorofluorocarbonsused in aerosol cans and refrigerants that

cause a depletion of the ozone layer

CFC’s

slide21
Area in which the addition of an abundance of limiting nutrients like nitrogen and phosphorus cause an algal bloom, blocking sunlight, and causing the death of organisms below

Dead zone

Tell where we could see this problem in the United States

Gulf of Mexico where Mississippi River empties

slide22
Natural process in which atmospheric gases trap energy from sunlight as heat

Greenhouse effect

the scientific study of interactions among

organisms and between organisms

and their environment

ecology

slide23

ecosystem

All the organisms that live in a place together with their nonliving or physical environment

an immediate increase in the amount of algae

and other producers that results from the addition

of a large amount of limiting nutrient

Algal bloom

slide24

Acid rain

Global warming

Air pollution/smogHabitat destruction

Name an environmental problem caused by burning fossil fuels

Tell the cause of dead zones

Agricultural runoff

slide25
Name an invasive species that is causing problems in South Dakota

Zebra mussels

Leafy spurge

Name the author whose book

“Silent Spring” described the dangers

of DDT and started the environmental

movement

Rachel Carson

slide26

high

Healthy ecosystems have a

________ level of biodiversity.

low high

Tell something humans do that endangers species and reduces biodiversity

Over hunting, poaching, habitat destruction, habitat fragmentation, industrial growth, ag runoff, burning fossil fuels (leads to global warming & acid rain); CFC’s, deforestation, air & water pollution. . . .

slide27
During the late 1950’s-early 1960’s people living

near Minamata Bay, Japan became ill with a

crippling neurological disease, later discovered

to be caused by mercury being dumped into the

ecosystem there. The toxin passed along the

food chain and people became ill from eating fish

caught in the bay.

This is an example of which concept you learned

about?

Biological magnification

Pollutants concentrate in the highest trophic levels (in this case… humans)

slide28

CO2

Methane

CFC’s

Water vapor

Name one of the greenhouse gases

Name an effect of too much UV light

Sunburn/skin cancer

Premature aging

Cataracts/blindness

Reduced crop yield

Food chain disruptions

slide29

Global warming(helps acid rain too)

Name the environmental problem addressed by the Kyoto Accord

Tell 3 “goods and services” ecosystems

provide for humans

Solar energy, food production, oxygen production, nutrient storage & recycling, climate regulation, habitats for wildlife, waste detoxification, natural pest/disease control, air/water purification, source of new medicines, soil erosion/runoff management

slide30
Name the environmental problemaddressed by the Montreal Protocol

Ozone depletion

Tell one effect of acid rain on

an ecosystem

Kills fish, reduces biodiversity, damages forests, human illness/death (asthma/bronchitis)

slide31

Reduce use of fossil fuels (anything that uses less electricity or less water would help)

Drive less

increase fuel efficiency on cars

National energy policy that emphasizes and encourages use of alternative energy

Recycle

Reduce deforestation

there are more. . .

Tell something we can do to help reduce global warming

slide32

Trees remove CO2 from atmosphereduring photosynthesis;

fewer trees means less CO2 is removed

… more global warming

How does deforestation impact global warming?

slide33

Solar energy

Oxygen productionNutrient storage/cycling

Climate regulationfood productionHuman/industrial waste detoxificationNatural pest/disease control

Source of new medicines

Source of raw materials for building stuffAir/water purificationerosion/runoff management

. . . . there are more

Name 3 “goods and services” provided to humans by the biosphere

slide34

Environmental Protection Agency

What does EPA stand for?

Which of the following are caused byburning fossil fuels?

acid rain

global warming ozone depletion

smog

All EXCEPT

ozone depletion

are caused by

burning fossil fuels

slide35

Sunburn, skin cancer, cataracts/blindness,

Premature aging (wrinkles), decreased crop production, harm food chains

Name 2 harmful effects of Ultra-violet light.

Which atom makes ozone?

Oxygen; O3