57.1
What Is Conservation Biology? 1227
Conservation biology is a normative
scientific discipline 1227
Conservation biology aims to prevent
species extinctions 1228
57.2 How Do
Biologists Predict Changes in Biodiversity?
1229
57.3
What Factors Threaten Species Survival?
1231
Species are endangered by habitat
loss, degradation, and fragmentation
1231
Overexploitation has driven many species
to extinction 1232
Invasive predators, competitors, and
pathogens threaten many species 1233
Rapid climate change can cause species
extinctions 1234
57.4
What Strategies Do Conservation Biologists
Use? 1235
Protected areas preserve habitat and
prevent overexploitation 1235
Degraded ecosystems can be restored
1236
Disturbance patterns sometimes need
to be restored 1237
New habitats can be created 1238
We use markets to influence exploitation
of species 1238
Ending trade is crucial to saving
some species 1238
Controlling invasions of exotic species
is important 1239
Biodiversity can be profitable 1240
Living lightly helps preserve biodiversity
1241
Captive breeding programs can maintain
a few species 1243
The legacy of Samuel Plimsoll 1243
