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Invasive Species

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Academic year: 2021

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(1)

Invasive Species

Competition between native species for insufficient sources cause extinction of natives and changes the structure of habitats.

(2)

• Alien Species

(3)

New species enterence can cause extintion of native anima species by

• Predation • Competition

• Addition of new levels in food chain • Habitat invasion

(4)

• According to IUCN data almost half of the animal extictions partially caused by invasive species.

(5)

Enterence of invasive species to new areas;

• Intentional enterence of new species by human • Agriculture, horticulture and aquaculture

• Unintentional enterence by human • Biological control

(6)

Ability of species to become invasive

• They do not have natural predatorsor parasites at new areas • They are more succesfull especially at destroyed habitats

(7)

• Invasive species reproduce rapidly outside of their native areas

• If there are close relatives at new areas they make hybrids and cause extinction of others.

(8)
(9)

Illnesses and outbreaks

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