Download Biodiversity threats

Thursday October 22nd
In Notebook:
What type of
graph is this?
&
Write 2 sentences
describing the
yeast population.
Today’s Learning Targets
Agenda:
1. Population Questions
2. Biodiversity
3. Populations Packet Work Time - Due Monday!
On a loose sheet of paper:
NAME
1. Is the world’s human population increasing or decreasing?
2. List 2 advances in society that allow for the carrying capacity/human
population to increase.
3. Which countries have a higher growth rate, developed or developing.
4. Is the human population on Earth greater than or less than 7 billion?
5. Do all countries have he same populations growth rate? Yes or No?
** Bring it up to me when done. No phones
until everyone is done!
Diversity in Everyday Life:
What is it?
Diversity = the quality or state of having many different
forms, types, ideas, etc.
=
Variety
of life in
an area
(# of
organis
ms)
Does location affect biodiversity?
Biodiversity Hot Spots! Biodiversity increases towards the equato
3 types
of
Biodiversity
Genetic
Diversity
Species
Diversity
Ecosystem
Diversity
Importance of Biodiversity: Direct vs. Indirect Value
$
Direct Economic value
• Plants and animals provide: Food, clothing, energy,
medicine, and shelter
• Preserve desirable genes of those who aren’t used
directly
– Food crops – most crops come from a few species
• They lack genetic diversity, so we need the wild variety to
increase diversity.
• Example: disease resistance in wild, but not food crops
Importance of Biodiversity: Direct vs. Indirect Value
Indirect Economic Value
• Plants provide oxygen & remove CO2
• Natural processes clean water
• Protection against floods & droughts
$
Indirect because… how you place a value/cost on these??
Water cycle, carbon cycle, wetlands
New York City – create $6 Billion water filtration system or
clean wetlands to filter water
natural processes cost less money than technology
Importance of Biodiversity
vs.
Aesthetic and scientific value
• Camping
• Hunting
• Research
$
What role do humans play?
•
Extinction = state or process of a species or larger group
dying out / disappearing
•
Normal Background Extinction: activity from other
organisms, climate change, and natural disasters ->
NOT A CONCERN!
•
1/3 to 2/3 of current species will go extinct in second half
of this century -> A CONCERN!
•
Humans are increasing extinction rates to 1000
times normal background extinction rate.
But it’s just one species…
Keystone Species = a species that plays a large role
in an ecosystem.
Removal of this species will affect entire food
web/ecosystem.
Think of it as the one block that drops the Jenga
tower!
What
threatens
biodiversity?
Concept Map: Example
Create a concept map with the following bullet points.
•
Breakfast
•
Dairy
•
Donut
•
Cereal
•
Yogurt
•
Grapes
•
Baked
Goods
•
Fruits
•
Scone
•
Fruit Loops
Threats to Biodiversity:
Individually create a concept map of the bullet points.
*Read book pages 124-128. Raise hand when done and I will check it!*
•
Biodiversity threats
•
Introduced Species
•
Eutrophication
•
Overexploitation
•
Destruction of Habitat
•
Acid Precipitation
•
Fragmentation of
Habitat
•
•
•
•
•
Biological Magnification
Disruption of Habitat
•
Carolina Parakeets were
hunted to extinction
because their feathers
were used for women’s
hats
•
Highways were installed
in rural Indiana forming
separate portions of
land
•
Lionfish are from the
Indo-Pacific, but can be
found in U.S. waters
after being dumped from
aquariums
Construction workers
are bulldozing trees and
compacting the ground
to build a subdivision
•
Factories create
pollution that harms the
habitats around them
Heavy metals used in
construction enter the
water/ the food web
•
River-run off containing
fertilizer enters ocean
and causes an increase
in nutrient availability
The pH of Adirondack
lake was lowered and
therefore many fish
could not survive.