Card Set Information
Biology invasive species
Flash cards for the biology topic about invasive species
What is an exotic species?
organisms that are not native to an ecosystem. Something that is introduced to an ecosystem for a reason.
example: saalmon in Lake Michigan for fishing
What is an invasive species?
exotic organisms that adersely impact the habitats they invade.
can be economic, environmental, or public health perspective
Why does it matter if an ecosystem is distrupted?
: timber, water, food, etc.
: ex. wetlands filter toxic substances
also maintains population balances
What are some examples of some invasive species?
: covers entire lake/pond so other organisms can't live there
Brown tree snake
: causes extinctions of other vertebrates, poweroutages and lack of exporting goods in Guam
Formosan Subterranean Termite:
rapid wood consumption rate because of large numbered populations
wild pigs, fragmities, ferrel cats, blackberry, pigeons
Why is Great Lakes region an invasive species hotspot?
Gateway for importing/exporting goods
What are some Great Lakes region invasive species and their impacts?
filter feeders, eat algae and make water cleaner but cling on pipes and other things that can cause clogs and backups
: eats eggs of important sport fish
get washed up on shore after spawing causing decrease in beachgoes
parasite on fish with sharp razor jawless mouths.
: will overtake all other plants in wetlands and cause major problems
has ability to eat all leaves in forest
Emerald ash borer:
lay their eggs in between bark and tree. eggs hatch and burrow tunnels through tree and end up killing it.
How did invasive earthworms get here?
: europeans used soil to balance ships their soil got dumped onto our soil
: plant root bulbs from other locations got transported here and contained earthworms in the dirt with it.
How do invasive earthworms spread?
Being used as bait
cocoons get stuck in the giant treads of trucks and tractors and get moved to a different location
What are the impacts that invasive earthworms have on the forest?
decreased seedling recuitment
reduced ground cover
reduce plant diversity
facilitates invasive plants
alters nutrient cycle