Invasive Species Flashcards
What are accidental sources of invasive species?
shipping boat bottoms, overflowing aquacultures, baitfish, and the pet trade
What intentional sources of invasive species?
introduced for food, recreation, or simply for fun
Why is it difficult for invasive species to become established?
The founders effect and not locally adapted
Describe the founders effects
a new population with a small amount of individuals becomes isolated which creates a new population with low genetic diversity and potential for inbreeding
What is propagule pressure?
multiple introductions of one species introducing more genetic diversity and increasing their invasion success
How do local adaptations affect invasion success positively?
specialization of native species results in invasive species doing better
What factors encourage invasive success?
Hybridyzation, local species specialization
How do invasive species affect ecosystems?
decrease native diversity/richness/eveness, ecosystem services, economic value and reintroduce sediment contaminants
How may invasive species reintroduce contaminants?
species can interact with abiotic factors that weren’t interacted with before
How can invasive populations be prevented or removed?
preventing introduction, early detection and eradication, limiting the spread, and genetic and biological control
What are methods of early detection and eradication of invasive species?
pesticides and harvesting
What are methods to limit the spread of invasive species?
barriers such as washing boats or electric fish barriers
what is a method of genetic control of invasive species?
producing sterile males
What is a method of biological control of invasive species?
introduce native predators of invasive species
