3/31 Flashcards

Endangered Species & Endangered Species Act (45 cards)

1
Q

/Who coined the term “endangered species?”

A

William Beebe

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2
Q

What was the term “endangered species” describing?

A

North American bison

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3
Q

When did the “official” status of the term endangered species become official?

A

When it was codified in the 1960’s

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4
Q

Who decides which species get listed?

A

ppp

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5
Q

What are the 2 types of endang. species lists?

A
  1. Informational

2. Regulatory

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6
Q

What is a regulatory list? Give example

A

Part of national legislation (ex. €Endangered Species Act of 1973)

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7
Q

What are “red data books” and “red lists?”

A

published in 1966 by IUCN

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8
Q

What is the IUCN criteria? (5)

A

-severely declining pop.
-small distribution and decline
small pop. size & decline
-very small or restricted pop.
-pop. is judged to be non-viable

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9
Q

When did the Us publish the first national list?

A

1966;

  • species listed as endangered
  • had legal force of Endangered Species Preservation Act of 1966
  • went to further than “protection”
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10
Q

Why did the US pass the endangered species act in 1973?

A
  • various species of fish, wildlife & plants become extinct with econ. cgrowth
  • others depleted in numbers & at danger of extinction
  • these have value
  • Us pledged itself to conserve fish, wildlife & plant species facing extinction
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11
Q

What ranking does the US have in regards to the highest number of threatened species?

A

2 (#1 is Ecuador)

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12
Q

What are the major reasons for extinction n the US? (in order)

A
  1. habitat loss/degradation
  2. alien species
  3. pollution
  4. overexploitation
  5. disease
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13
Q

What is the purpose of the Endangered Species act

A
  • protect endangered species & the ecosystems on which they depend
  • provide program for conservation or recovery of such species
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14
Q

Who is involved in the administration of the ESA

A
  • departments of interior & commerce
  • US fish & Wildlife Service (USFWS)
  • National Marine Fisheries Service (NMFS)
  • see pp
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15
Q

How does a species get listed?

A
  • anyone can petition to have species listed
  • ESA provides specific procedures on how they are evaluated (criteria, public comment, hearing etc.)
  • Species selected from candidate list (congress & prez must pass the candidates onto official list)
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16
Q

What are Recovery plans?

A

plan to get species off of endangered species list

-lay out steps required to get species back to secure status & delist species

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17
Q

Who prepares a recovery team?

A

-recovery team appointed by (interior or commerce) secretary (10-20 ind.)

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18
Q

What is a critical habitat?

A

Secretary designates a critical habitat

  • areas where species found
  • recommendation comes from recovery team
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19
Q

What are prohibited acts?

A
  • Import species into, or export any species from, the US

- see pp

20
Q

Has the ESA worked?

21
Q

How many species has the ESA prevented from extinction?

22
Q

What percent of listed species are recovering at the expected rate?

23
Q

What percent of species are stable or improving?

24
Q

Who long does recovery typically take?

25
How much does ESA cost US per year?
about $1.5 billion
26
Is the ESA supported by the public?
yes; 70% of Americans support the ESA
27
What is the population bottleneck? three phases?
species thriving, (decline phase) drops in population drastically, (endangered phase) eventually returns to recovery (recovery phase)
28
What are the two types of causes of endangerment?
1. ultimate | 2. proximate
29
What is an ultimate cause of endangerment?
history of trouble, background reason (ex. destruction of habitat) - underlie endangerment - difficult to correct in time - must be corrected to guarantee secure future
30
What is a proximate cause of endangerment?
exact cause of endangerment - SYMPTOMS of the endangered species - inadequate survival & reproduction, declining #'s - symptoms can be treated independently (without directly dealing with ultimate cause) - allows population to make it through crisis before addressing underlying issue
31
When is ultimate and proximate problems solved?
- usually simultaneously - never proximate without ultimate - rarely ultimate without proximate
32
How can managers stimulate rapid population growth?
``` If below K (carrying capacity): -reduce mortality factors -increase recruitment If at K: see pp ```
33
How is mortality reduced?
- reduce impacts of predators, competitors & diseases | - reducing "normal" losses even if not part of ultimate problem
34
What is an example of an endangered species dealt with by reducing mortality?
1. white tailed eagle - eagles were given clean food so they did not feed on food that was contaminated by chemicals (did not address ultimate problem) 2. japanese crane
35
How is recruitment increased?
- increase proportion of individuals that breed - increase fecundity - " reproductive successes - " rate of immigration
36
What are examples of endangered species dealt with by increasing recruitment?
- vulture restaurants - bluebirds - bermuda petrel - puerto rican parrot - kirtland's warbler
37
Several powerpoint slides
see pp
38
What are translocations?
- stimulate population growth | - widely used approach
39
What are the translocation guidelines?
- Where will the individuals be obtained? - How many will be translocated? - What is the impact on the source population? - Will translocated individuals stay put? - see pp
40
What are examples of a translocated species?
- wild turkeys (southern> northern states) - prairie chickens (allowed for outbreeding, improving survival) - florida panther
41
What are the common sources of mortality?
- predation - disease - see pp
42
What is avian cholera?
-kills thousands of migrating water birds
43
How are diseases managed?
-immunization | (done with blue tongue in bighorns,
44
What are some endangered species factors which have decreased?
Lead poisoning, Eagle electrocutions, manatees & propellers,
45
Management of Endangered Species
see pp last slide