1. Aquatic Macroinvertebrates Lab Using population sizes to assess the health of the environment

2. Announcements Substitute tomorrow- expectations Thursday AB sheet preAP??? Ex. Credit open house Pass forward science fair Qs (bring at LUNCH if you don’t have  Ms. D won’t be here tomorrow…) Sign up for biome to research w/ partner @ end of class

3. Why estimate population sizes? List as many reasons as you can think of Hunting Permits Endangered Species Assess impact of Disasters, Disease, Climate Change Assess health of environment To learn!

4. Why estimate population sizes? Assess impact of Disasters, Disease, Climate Change To learn! Assess health of environment …look @ pollution levels using aquatic macroinvertebrates!

5. Where do we have running water in Arizona? FWHS Madera Canyon

6. How can you determine the health of an environment using population numbers? Talk to your neighbor. Be ready to share.

7. Aquatic Macroinvertebrates & Water Quality Notes

8. What is an Aquatic Macroinvertebrate? Aquatic = live in water Macro = can see w/out microscope Invertebrate = no backbone

9. Why are Aquatic Macroinvertebrates good for assessing environmental health? They live near bottom of stream or lake, don’t move far, can’t escape pollution

10. Aquatic Macroinvertebrates react differently Intolerant macroinverts may die in polluted water Only see large populations in healthy streams & lakes Label these species with a on your sheet (= less pollution) Mayflies Stoneflies Caddisflies

11. Aquatic Macroinvertebrates react differently Tolerant macroinverts inhabit spaces vacated by the others that died Large populations in polluted streams & lakes Label species these with a  on your sheet (= polluted) Midges Tubifex Worms Pouch Snails

12. Today’s Activity You will have 8 seconds at your water station to collect as many aquatic macroinvertebrates as possible (goal = 100+) Sort bugs as a whole group Fill in data table for # organisms in each group

13. Percent composition calculation practice 13 midges 7 dobsonflies 5 craneflies ------ Total = 52% 13 / 25 = 0.52 >>> 52% 28% 20% 25 Total = 25

14. Assess the water quality from your stream Jefe read instructions & get group started on Data Table 2 6 If my group found 6 stoneflies, is this what I write in data table 2?

15. Assess the water quality from your stream Jefe read instructions & get group started on Data Table 2 2 8 Add all group scores to get TOTAL Recorder- Add water quality score & assessment to board when finished!

16. Closure- do on back After the BP oil spill, many people were concerned about the extent of the damage done to the Gulf aquatic environment. 1 paragraph w/ at least 3 vocab words from today: If you were asked to determine whether the Gulf has rebounded (i.e. is healthy again), explain what steps you would take & how you would know if the aquatic environment is healthy again.