Transcript Biodiversity - NVHSIntroBioGorney1

Warm-Up / EOC Prep
1. After a volcanic eruption has covered an area with
lava, which of the following is the most likely order of
succession in the repopulation of the area?
A. lichens grasses shrubs trees
B. mosses grasses lichens trees
C. grasses trees mosses lichens
D. shrubs grasses trees lichens
2. Driving your car directly impacts which nutrient cycle?
A nitrogen
B carbon
C water
D phosphorus
Agenda
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Warm Up
Quick look at endangered species
Guided Notes
Biological Magnification Worksheet / Graphing
Ecology Review Puzzle
Clean-Up
Biodiversity
Guided Notes 11
Value of Biodiversity
• Variety = Diversity
• Biodiversity-the total of the genetically based
variety of all organisms in the biosphere
• Ecosystem Diversity-the variety of habitats,
communities, and ecological processes in the
living world
Value of Biodiversity
• Species Diversity-number of different species
• 1.5 million species currently exist
• Genetic Diversity-total of all the different
forms of genetic information carried by all
organisms living on Earth
Value of Biodiversity
• Biodiversity is one of Earth’s greatest natural
resources. Species of many kinds have
provided us with foods, industrial products,
and medicines—including painkillers,
antibiotics, heart drugs, antidepressants, and
anticancer drugs
Value of Biodiversity
• The biodiversity represented by
wild plants and animals is a kind of
“library” of genetic information
upon which humans can draw for
future use
• When biodiversity is lost, potential
sources of material with significant
value to the biosphere and
humankind may be lost with it.
Threats to Biodiversity
• Human activity can reduce biodiversity by
causing the following:
1. Habitat Destruction
2. Wildlife Products Demand
3. Pollution
4. Invasive species
Threats to Biodiversity
• Extinction-when a species disappears from all
or part of its range
• Endangered species-a species whose
population size places it in danger of
extinction
Pollution
• Pesticide-a chemical used to kill insects
• DDT-harmful pesticide banned in the 1970s
after causing major harm to bald eagles and
other large birds
• However, DDT helps stop insect-borne
diseases such as malaria.
• Biological magnification-concentrations of a
harmful substance increase in organisms at
higher trophic levels in a food chain or food
web
• Therefore the pollution gets worse at each
level as you go up.
Pollution
• Silent Spring is a book
written by Rachel Carson in
1962.
• The book condemned the
use of DDT as a pesticide.
Carson claimed that DDT
was causing birds to
produce eggs with thin
shells that caused a lot of
deaths.
• Silent Spring was a very controversial book
and started a lot of discussion that led to the
banning of DDT.
• The book is also credited with starting the
environmental movement of the 1970s that
tried to prevent actions that harmed the
environment.
Conservation
• Conservation-the wise management of
natural resources including the preservation
of habitats and wildlife
• Many efforts are aimed
at managing individual
species to keep them
from becoming extinct
Conservation
• Today, conservation efforts
focus on protecting entire
ecosystems as well as single
species. Protecting an
ecosystem will ensure that
the natural habitats and the
interactions of many
different species are
preserved at the same
time.
• REVIEW
• the wise management of natural resources
including the preservation of habitats and
wildlife is called…
• Conservation
• Name the four threats to biodiversity:
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Habitat destruction
Wildlife products
Pollution
Invasive Species
• The total number of individuals that an
environment can support is called…
• Carrying capacity
• An organism’s role in its environment, the
food it eats, and the place where it lives is
called its…
• Niche
• What type of growth do humans show and
why?
• Exponential-medicine, sanitation, health care
• The variety of life on earth is called…
• biodiversity
Reminders
• Biome Brochure Due Next Fri. (Feb. 18th)
Warm-Up / EOC Prep
1. In a stable, long-existing community, the establishment
of a single species per niche is most directly the result of
A. parasitism
B. competition
C. interbreeding
D. overproduction
2. If a single plant species is removed from a food web,
then most likely A. an animal species will fill the unoccupied niche
B. other plants will produce enough food for herbivores
C. dependent herbivores will have to find new food
sources
D. carnivores will be unaffected by the loss
Agenda
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Warm Up
Over The Hedge
Clean-Up
Cool-Down
Biome Brochure Due Friday.
Ecol. Exam Thursday.