traits associated with extinction

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Environmental Science

12th

Last updated 12:08 AM on 11/4/22
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17 Terms

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Bat echolocation
Ultrasonic soundwaves used to locate objects, including prey
Soundwaves are emitted more frequently when close to an object
- More frequent soundwaves yield more precise location detail
Ultrasonic soundwaves used to locate objects, including prey Soundwaves are emitted more frequently when close to an object - More frequent soundwaves yield more precise location detail
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If hunting, bats "buzz" as they approach prey
A successful approach usually has 2 buzzes
If successful, there is a long-ish gap after the buzz
If unsuccessful, full "buzz" may not be reached and there is a smaller gap
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Specialized niche requirements
Habitat specialists
Dietary specialists
Specialized species interactions/relationships
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Large home range size
The home range of an animal is the area where it spends its time
The home range of an animal is the area where it spends its time
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Migratory species
Species that move from place to place on a seasonal basis.
Species that move from place to place on a seasonal basis.
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Form permanent or temporary aggregation
The group of animals that forms when individuals are attracted to an environmental resource to which each responds independently
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Limited mobility
-decreased range of motion.
-weakness.
-bedrest.
-decreased range of motion. -weakness. -bedrest.
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Low genetic variability
may reduce the capacity of endangered species to survive as humans continue to alter the environment
may reduce the capacity of endangered species to survive as humans continue to alter the environment
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Large body size
K-selected species
K-selected species
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long-lived species
delay reproduction; juveniles gain experience before high cost of reproduction
delay reproduction; juveniles gain experience before high cost of reproduction
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Delayed sexual maturation and low birth rate
Can't produce as often
Can't produce as often
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Declining of highly variable population size
Population is going down the path to extinction
Population is going down the path to extinction
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Hunted or harvested by people
Killing animals for goods or other inhumane practices
Killing animals for goods or other inhumane practices
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Naive to people and other predators
Thinking they won't get hurt so the will walk up to threats
Thinking they won't get hurt so the will walk up to threats
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Other warning signs of extinction vulnerability
Closely related to a species that is endangered or extinct
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Species typically have several of these traits if they have any of them
The more of these traits a species has, the more vulnerable it will typically be to extinction
The more of these traits a species has, the more vulnerable it will typically be to extinction
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The more of these traits a species has, the more vulnerable it will typically be to extinction
We can use these traits to evaluate extinction risk and prioritize species for conservation