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Threats to Biodiversity

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by

Devin Heggie

on 6 October 2015

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Transcript of Threats to Biodiversity

Threats to Biodiversity
Objectives
I CAN describe the threats to biodiversity.

I CAN describe how the decline of a single species can affect an entire ecosystem.

Threats to Biodiversity
Pollution changes the composition of
air, soil,
and
water
.
Extinction Rates
Extinction is the process in which an
entire

species
permanently
disappears
from the biosphere when that last member of the species dies.
Threats to Biodiversity
Threats to Biodiversity
Habitat Loss
is the
destruction
or disruption of an organisms

natural habitat which causes relocation or death.
What is Biodiversity?
Biodiversity
is the
variety
of life in an area that is determined by the
number
of different
species
in that area.
A
niche
is the
role
or position that an organism has in its
environment
.
Background Extinction
The
gradual process
of species becoming extinct
Mass Extinction
An event in which a
large percentage
of all living species become extinct in a relatively
short
period of time
Some scientist believe our current extinction rate is 1000x higher than the normal background extinction rate
Threats to Biodiversity
Introduced Species are
non-native
species that are either intentionally or unintentionally
transport
to a new habitat
Overexploitation
is the
excessive
use of an organism which has
direct
economic value.
Habitat
Fragmentation
is the
separation
of an ecosystem into small pieces of land due to human-made
barriers
.
Biological
Magnification
is the increasing concentration of
toxic substances
in organisms as trophic levels increase in food chain or food web
Argumentative Writing:
Should endangered species be protected?
What would most likely happen to the organisms in this food web if the robin began to disappear?
10/2/15
Answer the question in a complete sentence. .
Do Now
10/5/15
Describe one of the threats to biodiversity that we discussed in class on Friday.
Write the question and a 2-3 sentence answer.
1. Be sure to choose one of the organisms from the table.

2. Decide if you are FOR or AGAINST a program for protecting the species you have selected.

3. Research and develop a list/notes on points that support your position (use the textbook, internet, library, etc.)

4. Write a 1 page statement that summarizes your position on either protecting or not protecting the organisms.

5. We will discuss as a class everyone's individual position on each organisms on the list.
Do Now
Use the information that you compiled yesterday to start discussing what you researched yesterday. Write an explanation of why we should save the animal or plant you chose. Be prepared to share with your group and the class.
10/6/15
Choose (1) Endangered Species
Describe why you think it is important to save this organism.
Full transcript