Objectives • Define exotic species (alien) and invasive species. • Describe how invasive species affect an ecosystem.
Exotic (alien) species • Species that has been introduced into a new environment • A non-native species • Examples: plants, animals, diseases
Invasive species • An exotic (alien) species that has a negative effect on the new ecosystem
Brief History • Fire ants introduced into Mobile Bay in 1918 • Painful sting • Zebra mussels introduced into the Great Lakes in 1988 • Clogged pipes • Displace native game fish
Common Florida Invasive Species • Cane toads • Wild hogs • Fire ants • Burmese python • Lionfish
Common Florida Invasive Species • Brazilian pepper • Melaleuca • Australian pine • Hydrilla • Water hyacinth
Characteristics of Invasive species • Rapid lifespan • High rate of reproduction • Tolerate a large range of environmental conditions • Effective and efficient method of dispersal • Highly competitive for limited resources
Control/Management Strategies • Control of rabbits in Australia by Myxoma virus • Cottony Cushion Scale in citrus controlled by Vedalia ladybugs