Transcript Biodiversity - Sandia High School

Biodiversity:
Who cares?
Limiting Factors and
Carrying Capacity
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Populations will continue to grow until some
limiting factors are imposed
Limiting factors limit the growth of populations
and the number of species in an eosystem
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Food
Water
Shelter
Space
Carrying capacity of a particular environment is
the total number of individuals that the area can
hold
Chemical Cycling
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Nutrient cycles-cycling of essential nutrients
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involve both abiotic and biotic components of an
ecosystem
Water, Carbon, Nitrogen, Phosphorus
Which is more diverse?
A
B
Which is more diverse?
A
B
Which is more diverse?
A
B
Which is more diverse?
A
B
Which has more cultural
diversity?
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B
Which has more biodiversity?
A
B
Which has more biodiversity?
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B
What do you think biodiversity
means?
Biodiversity
What does “Bio” mean?
Bio =
Biodiversity
What does “Diversity” mean?
Diversity = Variety
Biodiversity is the variety of life in an
area or on Earth
• Scientists have identified more than 2 million
species.
•Tens of millions -- remain unknown
•The variety of life on Earth is made possible
by complex interactions among all living.
Biodiversity
Measured by the number of species in an area
Saki Monkey
Golden Skimmer
Meadow Beauty
Threats to biodiversity
Loss of Habitat
Pollution
Species Introductions
Global Climate Change
Exploitation
Should we be concerned about
biodiversity?
What we know:
The Earth is losing species at an alarming rate
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Some scientists estimate that as many as
3 species per hour are going extinct and
20,000 extinctions occur each year.
When species of plants and animals go
extinct, many other species are affected.
Population & species level conservation
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Biodiversity hot spot: small area
with an exceptional concentration of
species
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Endemic species: species found
nowhere else
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Endangered species: organism
“in danger of extinction”
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Threatened species: likely to
become endangered in the foreseeable
future
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Bioremediation: use of living
organisms to detoxify polluted systems
Human Impact
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Biological magnification:
trophic process in which retained
substances become more
concentrated at higher levels
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Greenhouse effect: warming of
planet due to atmospheric
accumulation of carbon dioxide
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Ozone depletion: effect of
chlorofluorocarbons (CFC’s) released
into the atmosphere
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Habitat destruction
What do we get from
biodiversity?
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Oxygen
Food
Clean Water
Medicine
Aesthetics
Survival
Conservation Biology
A branch of biology that focuses on the
preservation of biodiversity
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Preservations
Rescue programs
Resource
conservation
Reintroduction
programs