Lecture 8- Conversation status Flashcards
How many species did the IUCN recognise in 2008?
5488
IUCN 9 categories:
Extinct Extinct in the wild Critically endangered Endangered Vulnerable Near threatened Least concern Data deficient Not evaluated
Which three categories count as threatened?
Critically endangered
Endangered
Vulnerable
IUCN classifies a species as extinct if…
The species has not been detected for 50 years
Macphee and Flenming (1999) listed how many species as extinct since 1500
88 species
2008 assessment figure for EXTINCT
76 species
2008 assessment figure for EXTINCT IN WILD
2 species
2008 assessment figure for CRITICALLY ENDANGERED
188 species
2008 assessment figure for ENDANGERED
448 species
2008 assessment figure for VULNERABLE
505 species
2008 assessment figure for NEAR THREATENED
323 species
2008 assessment figure for DATA DEFICIENT
836 species
2008 assessment figure for LEAST CONCERN
3110 species
IUCN 11 classes of threat:
Biological resource use Agriculture and aquaculture Residential and commercial development Invasive and other problematic species Natural system modifications Human intrusions/disturbance Transportation and service corridors Energy production and mining Climate change and severe weather Pollution Geological events
Species threatened by BIOLOGICAL RESOURCE USE
819
Species threatened by AGRICULTURE AND AQUACULTURE
773
Species threatened by RESIDENTIAL AND COMMERCIAL DEVELOPMENT
354
Species threatened by INVASIVE AND OTHER PROBLEMATIC SPECIES
239
Species threatened by NATURAL SYSTEM MODIFICATIONS
234
Species threatened by HUMAN INTRUSIONS/DISTURBANCE
146
Species threatened by TRANSPORTATION AND SERVICE CORRIDORS
141
Species threatened by ENERGY PRODUCTION AND MINING
120
Species threatened by CLIMATE CHANGE AND SEVERE WEATHER
119
Species threatened by POLLUTION
73
Species threatened by GEOLOGICAL EVENTS
18
