1. Human Issues, Impacts, & Solutions I

2. Issue: Invasive Species

3. Possible Solutions: Pay attention to bioindicators
Species that are sensitive to change
Show early warning signals of environmental problems

4. Issue: Habitat Loss

6. Possible Solutions:
Conservation Biology: identify, protect, and maintain areas at risk.
Restoration Biology: rebuilding damaged ecosystems
Ecotourism: educates travelers about ecosystem while raising funds for conservation
Artificial corridors promote dispersal and help sustain populations

7. Issue: Biomagnification

8. Possible Solutions
Banning of toxic pollutants (worst ones have already been banned, like DDT)
Regulate or even eliminate processes that create toxins (ex. Burning Coal)

9. (a) In 1991, before restoration
Figure 55.17
Figure A gravel and clay mine site in New Jersey before and after restoration.
(a) In 1991, before restoration
(b) In 2000, near the completion of restoration 9

10. Concentration of soluble uranium (M)
Figure 55.18 6 5 4 3 2 1
Concentration of soluble uranium (M)
Figure Bioremediation of groundwater contaminated with uranium at Oak Ridge National Laboratory, Tennessee. 50
100
150
200
250
300
350
400
Days after adding ethanol 10

11. Possible Solutions
Bioremediation is the use of living organisms to detoxify ecosystems
- The organisms most often used are prokaryotes, fungi, or plants
Biological augmentation uses organisms to add essential materials to a degraded ecosystem