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NREM 120 Exam 4 (Iowa State) | Questions And Answers Latest {} A+ Graded | 100% Verified
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NREM 120 Exam 4 (Iowa State) | Questions And Answers Latest {} A+ Graded | 100% Verified
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NREM 120 Exam 4 (Iowa State) | Questions And Answers Latest {2024- 2025} A+ Graded |100% Verified
Solutions to preserve species - 1. species approach
2. zoo-botanical garden approach
3. Ecosystem approach
species approach - focuses on one animal; reintroduction of species to a habitat
zoo-botanical garden approach - if no other alternative; temporary; goal is to release the animal into
their natural habitat; captive breeding
ecosystem approach - removing one species will shake up the entire food web; work with the entire web
keystone species - a species that shakes the entire food web; has the most connections
causes of species extinction (ranked) - 1. loss of habitat
2. invasive species
3. traits of the vulnerable
4. toxic chems
5. hunting
native - historically found here
nonindigenous - introduced into an area or ecosystem outside its historic or native geo range (alien,
exotic, non-native)
invasive - exotic species that pose a threat to the integrating of native ecosystems
endemic - native to a specific place found nowhere else
, Columbian Exchange - The exchange of plants, animals, diseases, and technologies between the
Americas and the rest of the world following Columbus's voyages.***brought invasive species****
modern commerce has what effefct - air and marine shipping routes has allowed for the exaserbating of
the invasive species issue
How did invasive species get here? - accident and design
By design invasive species - - Domesticated plants and animals
- fisheries and wildlife - to support new hunting, fishing, and aquaculture opportunities
- pet trade
House sparrows - were native to most of Europe and Asia. In an attempt to control insects, brought
them over to North America and they then ate everything - including the grain
Starlings - Eugene Schieffelin released every bird from a Shakespeare play into central park; Starlings
then took over the continent
1900 Lacey Act - prohibits import of ingurious species
Invasive species by accident - - hitch hikers with commercial transport
- pests brought in with foreing products
- disease organisms carried by many different sources
why are invasive species a problem? - - economic costs to ag
- crowd out native species
- disrupt ecosystem functions
- unlike pollution, exotics are forever
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