interdependence & populations -...
TRANSCRIPT
Interdependence &
Populations
SC.912.L.17.5 Analyze how population size is determined by
births, deaths, immigration, emigration, and limiting factors
(biotic and abiotic) that determine carrying capacity.
1. Students will use data and information about population
dynamics, abiotic factors, and/or biotic factors to explain and/or
analyze a change in carrying capacity and its effect on population
size in an ecosystem.
What might
cause the
population to
go up and
down in this
environment?
1. Students will use data and information about population
dynamics, abiotic factors, and/or biotic factors to explain and/or
analyze a change in carrying capacity and its effect on population
size in an ecosystem.
Birth rates outnumber death rates, population will increase
Death rates outnumber birth rates, population will decrease
The growth rate of a population is measured in terms of birth
rate and death rate.
Fertility rates, life expectancy, migration/immigration also
contribute to changes in population.
Human Impact
SC.912.L.17.20 Predict the impact of individuals on
environmental systems, and examine how human lifestyles
affect sustainability.
1. Students will predict how the actions of humans may
impact environmental systems and/or affect sustainability.
Impact of Humans on the Environment:
Cause extinction through hunting, fishing, agriculture, industry,
and urban environment
Growing human population = higher demands on
environment
Affect quality and quantity of land, air, and water resources
1. Students will predict how the actions of humans may
impact environmental systems and/or affect sustainability.
Humans also cause pollution:
Air pollution = smog, acid rain, dust, smoke, gases, fog,
carbon dioxide
Land pollution = landfills, dumpsites, runoff, negligence, urban
wastes
Water pollution = sewers, industries, farms, homes, chemical
waste, fertilizer, dirty dish water
1. Students will predict how the actions of humans may
impact environmental systems and/or affect sustainability.
All of these human impacts cause a DECREASE in BIODIVERSITY!
Biodiversity is the variety of life in an area that is determined
by the number of different species in that area.
1. Students will predict how the actions of humans may
impact environmental systems and/or affect sustainability.
Humans can help to conserve biodiversity by:
Conserving energy resources
Protecting and conserving material resources
Controlling pollution (recapture wastes, carpooling, solid waste
neutralization)
Wildlife conservation to protect animals from habitat loss,
overhunting, and pollution
Reduce, reuse, recycle programs
Sanitation and waste disposal programs
2. Students will evaluate possible environmental impacts
resulting from the use of renewable and/or nonrenewable
resources.
Renewable Resources: resources that are replaced by natural
processes faster than they are consumed
Examples: solar energy, wind energy, water energy
These sources can often be costly, and new technologies are
still being utilized. These resources are not unlimited and may
eventually become depleted if they become consumed faster
than can be made.
2. Students will evaluate possible environmental impacts
resulting from the use of renewable and/or nonrenewable
resources.
Nonrenewable Resources: resources that are found on Earth in
limited amounts or that are replaced by natural processes
over extremely long periods of time
Examples: oil, coal, natural gas
These sources can are often more cost effective, but are found
in limited quantities.