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Ailen Species

another ppt!!!!

species introduced deliberately or accidentally from somewhere else non-native species
(released pets, livestock and game animals) - can spread disease, compete with native species domestic/feral
(out of control natives)- native species that benefit from our land use (disturbance) Human commensal or subsidized
species that spread subsequent to established usually at some cost Invasive Species
Invasive species can be introduced deliberately through: naturalization societies, game animals, domestic animals
Invasive species can be introduced accidentally through: ballasts of ships, unprocessed wood, fruit shipments, by-pass natural barriers
Intentional Release of Target Species into Containment: escape from zoos, farmed species, aquaculture, research
Intentional Release of Target Species into the Environment: Plants for agriculture, forestry, soil improvements, birds/mammals for hunting, biological control
Release of Non-Target Species (AKA “Accidental” Releases): Hitchhikers coming into contact with produce, aquaculture, gardening, cars, planes, ballast in ships, tourists/luggage
What are the consequences of biological invasions? threaten biodiversity, costly, widespread
New species introduced are so successful because: escape from natural enemies, increased competitive ability, pre-adapted to disturbed environments
Characteristics of invasive species high abundance, small size, high reproductive potential, good competitors, social
Stages of invasion 1) opportunity/transport 2) establishment 3) spread
What makes certain ecosystems more vulnerable? disturbed habitats, human residential areas, islands, non diverse areas
How do we reverse invasions? prevention, detection, assessment
Created by: acorso3