Extinction
Environment
Environmental change can
make it harder to survive
Promotes speciation
Preservation
Translocation
Moving of a species
from one habitat to 
a similar environment
Corridors
Connection of many
fragmented populations
Increases chance to find mate
Reservations
Protection of animal habitats and resources
Genetic rescue
Hybridization with a closely 
related species
Can hinder preservation
due to loss of species gene
Mass extinction
Periodic mass of extinctions
where 35-40% of species go
extinct
Last major mass extinction 
occurred 65 million years ago
with the dinosaurs
Populations
The smaller the population of a 
species the more vulnerable the
population is to extinction
Decreases range of a
population
Can cause fragmentation 
of a population
Higher rate of extinction
on islands than on mainland
3 Major causes
Habitat destruction
Accounts for 36% 
of extinctions
Causes
Farming
Overgrazing
Deforrestation
Urbanization
Hunting
Accounts for 23%
of extinctions
Species Introduction
Accounts for 39%
of extinctions
Increases competition
Predation of other species
Introduction of 
new diseases
