BIOL3701 Lecture Notes - Lecture 8: Reproductive Isolation, Cites, Data Deficient
26 Jun 2018
School
Department
Course
Professor
History of Conservation
Conservation of Species: IUCN Red list of threatened species
First approaches – 1960s, aims:
oTo highlight species at risk of extinction
oTo promote their conservation
Continuously evolving, annual updates by IUCN
oIUCN = International Union for Conservation of Nature
oUsed for national legislation, international planning and research
36% of all species
oThreatened with EXTINCTION
Examples of Threatened Species
White rhino
oWorld’s last male northern white rhino has died
oOnly 2 norther rhinos remain:
Male’s daughter and granddaughter
oA copy of his genetic material was taken in hope of future technology
reviving them
oDue to decades of poaching
Giraffe
oHabitat loss
oIllegal hunting
oEcological changes
oDecline globally 40% in last 30 years
oThreatened category
Okapi
oOne of Africa’s rarest birds
oBrink of extinction
Conifers
oShrimp, snails, porpoise
oLizard skink species – extinct
Whale shark
oEndangered
Koala
oThreatened
Glider
oNear threatened
find more resources at oneclass.com
find more resources at oneclass.com
IUCN Red List
IUCN Red List Categories
Extinct (EX)
oNo reasonable doubt the last individual has died
Extinct in the wild (EW)
oSpecies is known only to survive in cultivation, in captivity or as a
naturalized population
Critically Endangered (CR) – Endangered (EN) – Vulnerable (VU)
oWhen the species has been assessed against the criteria and is
thought to be facing a high to extremely high risk of extinction in the
wild
Near Threatened (NT)
oWhen a species does not meet criteria but is close to qualifying (or
likely to) for threatened category in near future
Least Concern (LC)
oWhen a species does not meet listing under a higher category of threat
Data Deficient (DD)
oInadequate info to make a direct or indirect assessment based on
species’ distribution and/or population status
Not Evaluated (NE)
oSpecies has not yet been evaluated
Assessment of Species at Risk
First approaches common sense of experts
Now:
oData-based
oExperts providing data
1-2 assessors compile info and allowed to estimate
oReviewed
By 2 evaluators
Scientists, IUCN, BirdLife, Web forums etc.
Overall – 7000 people involved
oQuantitative and objective criteria
Estimates extinction risk
Submission Requirements based on data on:
Range size
Population size and trends
Distribution
Habitat preferences
Threats
Conservation actions in place
Conservation actions needed
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Conservation of species: iucn red list of threatened species. First approaches 1960s, aims: to highlight species at risk of extinction, to promote their conservation. Continuously evolving, annual updates by iucn: iucn = international union for conservation of nature, used for national legislation, international planning and research. 36% of all species: threatened with extinction. White rhino: world"s last male northern white rhino has died, only 2 norther rhinos remain: Male"s daughter and granddaughter: a copy of his genetic material was taken in hope of future technology reviving them, due to decades of poaching. Giraffe: habitat loss, illegal hunting, ecological changes, decline globally 40% in last 30 years, threatened category. Okapi: one of africa"s rarest birds, brink of extinction. Conifers: shrimp, snails, porpoise, lizard skink species extinct. Extinct (ex: no reasonable doubt the last individual has died. Extinct in the wild (ew: species is known only to survive in cultivation, in captivity or as a naturalized population.
