Transcript Ch. 6 - Humans in the Biosphere

Chapter 6
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All organisms on earth share limited
resources.
All organisms on earth depend on each other
for survival.
We must protect our resources.
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Human activities
have impacted
ecosystems.
◦ Hunting and
gathering
◦ Agriculture
◦ Industrialization
◦ Urban development
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Natural resources
are in danger of
being depleted
and/or polluted.
◦ Renewable
 Water, wind, solar
◦ Nonrenewable
 Fossil fuels – coal, oil,
natural gas
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Any resource, if free
and accessible to
everyone, is in
danger of being
depleted and
eventually destroyed.
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Over-hunting
Over-fishing
Over-grazing
Over-farming
Deforestation
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Development that
uses natural
resources without
harming or
depleting them.
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Forest management
Aquaculture
Renewable resources
Green building
Catskill Center for
Conservation and
Development
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Biodiversity is an
important source of
foods, industrial
products and
especially
medicines.
The tropical
rainforest has the
greatest
biodiversity on
earth.
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The greater the
biodiversity the
more stable the
ecosystem.
Human activities
have reduced
biodiversity,
causing some
species to become
endangered or
extinct.
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Loss of habitat
Wildlife products
(poaching)
Pollution
Biological
magnification
Invasive species
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..\..\..\Videos\RealPlayer Downloads\Biocides
Rachel Carson.flv
Figure 6-16 Biological Magnification of DDT
Section 6-3
Fish-Eating Birds
Magnification of
DDT Concentration
10,000,000
Large
Fish
Biomagnification
1,000,000
Small Fish 100,000
Zooplankton 10,000
Producers 1000
Water
1
Rock Snot
Zebra mussels
Eurasian
Milfoil
Endangered
Species
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Human activities have impacted the abiotic
environment.
◦ Ozone depletion
◦ Global warming
◦ Acid rain
Figure 6-12 The Formation of Acid Rain
Section 6-2
Emissions to Atmosphere
Nitrogen oxides
Sulfur dioxide
Acid Rain
Chemical Transformation
Nitric acid
Sulfuric acid
Condensation
Dry Fallout
particulates, gases
Industry
Transportation
Ore smelting Power generation
Precipitation
Acid rain, fog,
snow, and mist
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Endangered Species Act – 1973
National Parks
Marine Sanctuaries
“Go Green”
Earth Day – 1970
Environmental Education
DEP
DEC
3 R’s – reduce, reuse, recycle
Ecotourism
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http://www.cbsnews.com/video/watch/?id=2
714989n