“rescuing species”rescuing species iberian lynx pika tiger
TRANSCRIPT
“Rescuing Species”
IBERIAN LYNX
PIKA
TIGER
Learning Targets“I Can . . .”
- Define an “ecological hot spot.”-Describe an ecological hot spot using an animal or plant that became/almost became extinct.-Suggest an alternative solution to prevent the extinction/near extinction event.
Extinction of SpeciesCase Studies
DODO BIRD
WOOLYMAMMOTH
TRILOBITE
How human threaten biodiversity…
• Human activity in habitats can create ecological hot spots.
• These are areas which have traditionally had lots of biodiversity but have lost much of that biodiversity due to human activity.
How humans threaten biodiversity…
DIRECT THREATS:
•Unregulated sport hunting
•Accidental killing
•Commercial harvesting
•Harassing
•Poisoning
•Collecting
How humans threaten biodiversity…
INDIRECT THREATS:
• Pollution
•Invasive species
•Damming
•Deforestation
•Urbanization
•Agriculture conversion
Why is it bad to have small populations?
1. Environment unpredictability: population is so small that natural catastrophes, weather, resource shortages, and predators could cause an extinction
2. Genetic unpredictability: population is so small that inbreeding occurs
3. Demographic unpredictability: population is so small that opposite genders are difficult to find
New roads are built and cut off small
populations from oneanother
Inbreeding increasesin the isolatedpopulations
Fewer individualsare born and more
die because of inbreeding depression
Isolated populationsBecome smaller
An increased proportionof the population iskilled by hunters
Fewer individuals areleft in the population
Fewer animalare around to be
hunted
Fewer new animalsare born
Your assignment
1. Select a plant or animal that has gone or almost has gone extinct
2. Complete Parts 1-3 on your worksheet
3. Complete Part 4 on a poster that will be presented to the class
The Heath Hen
Gray Wolf
Ivory-Billed Woodpecker
Passenger Pigeon
American Chestnut Tree
Kirtland’s Warbler
The Black-footed Ferret
The Grizzly Bear
References
• http://www2.volstate.edu/jschibig/resurrectingthechestnut.htm