| Estimated extinction rate |
Percent global loss per decade
|
Method of estimation
|
| 1 million species between 1975 and 2000 |
4
|
Extrapolation of past exponential trend
|
| 15%-20% of species between 1980 and 2000 |
8-11
|
Species-area curves and projected forest loss
|
| 12% of plant species in neotropics |
|
Species-area curves
|
| 15% bird species in Amazon basin |
|
As above
|
| 2000 plant species per year in tropics and subtropics |
8
|
Loss of half the species in areas likely to be deforested by 2015
|
| 25% of species between 1985 and 2015 |
9
|
As above
|
| At least 7% of plant species |
7
|
Half of species lost in next decade in 10 'hotspots' covering 3.5% of forest area
|
| 0.2%-0.3% per year |
2-3
|
Half of rainforest species lost in tropical rainforests are local endemics and becoming extinct with forest loss
|
| 5%-15% of forest species by 2020 |
2-5
|
Species-area curve; forest loss assumed twice rate projected by FAO for 1980-85
|
| 2%-8% loss between 1980 and 2015 |
1-5
|
Species-area curve; range includes current rate of forest loss and 50% increase
|
