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