1. Today at 5pm in PAR 201 “Nobelity”
M 5/5 Field Trip- 2pm Bonus #3 due now

2. What is being done to maintain it?
CB 55.2
Biodiversity:
What is being done to maintain it?

3. Nearly Extinct Species: maybe only 100 individuals exist
CB 55.3

4. Extinction Vortex

5. Attwater Prairie Chicken
As population declined, genetic diversity declined
CB 55.10

6. Attwater Prairie Chicken
Individuals brought from other populations increased reproduction and population
CB 55.10

7. In Costa Rica they have a two tiered park system:
CB 55.19
In Costa Rica they have a two tiered park system:
National Parks- very restricted human activities
Buffer zones- some restrictions on human activities
National park
Buffer zone

8. Developed vs Developing nations:
CB 55.19
Developed vs Developing nations:
Should/would the US designate such large areas as parks?
National park
Buffer zone

9. What are the two most basic resources necessary for biodiversity?

10. CB 55.22
Truckee River, Nevada- Water diversions reduced flow. Increased flows during willow and cottonwood seed release season allowed recovery of riparian ecosystem.

11. CB 55.22
Kissimmee River, Florida- Had been turned into a 90 km canal. About 24 km of the river has been restored.

12. CB 55.22
Rhine River, Europe- dredging for ships reduced biodiversity. Side channels are being reintroduced to allow species to recover.

13. CB 54.17
Water cycle

14. Stream restoration in urban catchments through redesigning stormwater systems: looking to the catchment to save the stream
C. Walsh, T. Fletcher, and A. Ladson
J. N. Am. Benthol. Soc., 2005, 24(3):690–705

15. Restoration of streams degraded by urbanization has usually been attempted by enhancement of instream habitat or riparian zones.

16. Restoration of streams degraded by urbanization has usually been attempted by enhancement of instream habitat or riparian zones.

17. Restoration of streams degraded by urbanization has usually been attempted by enhancement of instream habitat or riparian zones.

18. Recent studies of urban impacts on streams in Melbourne, Australia, on water chemistry, algal biomass, diatoms and invertebrates, suggest that the primary degrading process to streams in many urban areas is effective imperviousness.

19. The direct connection of impervious surfaces to streams means that even small rainfall events can produce sufficient surface runoff to cause frequent disturbance.

20. Where impervious surfaces are not directly connected to streams, small rainfall events are intercepted and infiltrated.

22. A wet retention pond to filter pollutants and buffer and maintain stream flow

23. Roadside swales can increase water filtration

24. Inlet screens for filtering large debris

25. Baffle boxes to remove sediment

30. Restoration of streams degraded by urbanization has usually been attempted by enhancement of instream habitat or riparian zones.

31. The use of alternative drainage methods, which maintain a near-natural frequency of surface runoff from the catchment, is the best approach to stream restoration in urban catchments.

32. Stream restoration in urban catchments through redesigning stormwater systems: looking to the catchment to save the stream

33. Today at 5pm in PAR 201 “Nobelity”
M 5/5 Field Trip- 2pm Bonus #3 due now