Water Quality
Park rangers can tell how clean rivers and ponds are by studying the creatures that live in the water. They count macroinvertebrates - animals with no backbones - that are large enough to see without a microscope or other tool. Snails, crayfish, and most insects are macroinvertebrates.
To play the WebRanger activities you must have:
- The Macromedia Flash Player 6 (click below to install)
- A JavaScript enabled browser
- Related Links
- Water Resources
- http://www.nature.nps.gov/water/hydrology.htm
- Everglades NP
- http://www.nps.gov/ever/eco/quality.htm
- Rocky Mountain NP
- http://www.nps.gov/romo/resources/environment/…
- Glen Canyon NRA
- (http://www.nps.gov/glca/lpp.htm
- Catoctin Mountain Park
- http://www.nps.gov/cato/pphtml/…
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