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Monday, December 8th, 2014
Write A if you agree with a statement, write D if
you disagree with the statement and correct
the statement
Statement
1. Biodiversity is the number of organisms in an
ecosystem
2. Extinction is a normal part of nature
3. Small areas of habitat are normally more
diverse than larger areas
4. There are laws to protect species and their
habitats
5. Habitats that have been harmed cannot be
restored
6. Ecosystems that are wet and warm have the
lowest levels of biodiversity
Agree or disagree


SWBAT order the conservation levels; extinct,
endangered, threatened, and least concern.
SWBAT describe the conservation status of a
species by looking at an example.
Essential Questions
 What are the levels of animal conservation?
What do the different levels mean? Why are
the definitions not very specific?
1.
Did you do it?

Extinct
◦ A species that was once present on earth but has died
out

Endangered
◦ In danger of becoming extinct
 3,079 animals, 2,655 plants (2012)

Threatened/Vulnerable
◦ A species likely to become endangered in the near future
 4,728 animals, 4,914 plants (2012)

Least Concern
◦ Species that are protected but not threatened or species
that have been evaluated and are not qualified for
another category
Least
Concern
Threatened
Endangered
Extinct

Speculate why the definitions are not more
clear
◦ As in “if there are under 2000 individuals the
species is considered endangered”
◦ Or of there is less than 50% of the original
population the species is threatened

Critical Depensation
◦ A mathematical measure of biomass related to
population growth rate





Rate of decline
Population size
Area of geographic distribution
Degree of population fragmentation
Example
◦ Wild Water Buffalo – Endangered – 4000 individuals
◦ Jaguar – Near threatened - ~2000 individuals
Green – Passenger Pigeon
 Yellow – Bald Eagle
 Orange – Polar Bear
 Pink – Green Sea Turtle
1st Lets predict which animal will go under each
classification
1. What is the conservation status of your
animal.
2. Why do you think the status is what it says
and in which direction is it headed?


What are the levels of animal conservation?
What do the different levels mean? Why are
the definitions not very specific?
Draw a continuum of the 4 levels of conservation
Predict the conservation category based on the paragraph
1.
Since the introduction of the whaling ban, studies have
examined whether the conservation reliant global blue
whale population is increasing or remaining stable. In the
Antarctic, best estimates show an increase of 7.3% per
year since the end of illegal Soviet whaling, but numbers
remain at under 1% of their original levels.
1.
2.
Most lions now live in eastern and southern Africa, and
their numbers there are rapidly decreasing, with an
estimated 30–50% decline per 20 years in the late half of
the 20th century. Estimates of the African lion population
range between 16,500 and 47,000 living in the wild in
2002–2004,down from early 1990s estimates that ranged
as high as 100,000 and perhaps 400,000 in 1950