Science in an old growth Redwood Forest at Grizzly Creek State Park.

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Presentation transcript:

Science in an old growth Redwood Forest at Grizzly Creek State Park

Healthy Streams: What makes a healthy stream?

Scientists observe, measure, record, analyze, and make conclusions

What is turbidity? Why is turbidity important for a healthy stream?

Dr. William Trush, River Ecologist McBain and Trush, Arcata CA If the turbidity in a stream reaches 20 NTU’s for 20 straight days, the forming salmonid will not be able to see its food, will not grow to its full length, and will be unlikely to survive into adulthood.

Using the Slyter Stick to take a sample

Turbidity Data all 5 Schools

Data Report Covers a Slice of Time Nov.22, 2014 Dec.6, 2014

Water Temperature Why is water temperature important to a healthy stream?

Temperature can be measured in two scales.  CELSIUS  FAHRENHEIT  10 degrees Celsius is the same as  50 degrees Fahrenheit

What is the most prevalent fish in the Van Duzen and Eel Rivers?

Salmon like it colder!  Coho salmon like it colder than chinook  Chinook like it 55 degrees to 67 degrees Fahrenheit (12-19 degrees Celsius)  Coho like it 50 degrees to 62 degrees. (10-16 degrees Celsius)  Chinook eggs hatch, grow, and move to the estuary in a few months.  Coho eggs hatch and stay in the cold creek for many months before moving to the estuary.

Data Temperature 5 School and 3 Locations

Grizzly Creek Dec.6 th, 2014

What is ph Why is ph important to a healthy stream?

Main Stem at Grizzly Creek

pH rises and falls during the course of a hydrologic year The North Coast Water Quality Control Board objectives for pH in the Van Duzen River are 6.5 to 8.5.

pH Eel River, Van Duzen River, Grizzly Creek

Fruits and vegetables can raise your bodies pH.  The pH scale ranges from 0 to 14; pure water has a neutral pH of 7. Acids range from 0 to 7, and bases range from 7 to 14 on the scale. The website Alkalize for Health reports that human blood maintains a steady pH of 7.4, making it slightly alkaline.

Science at Grizzly Creek Park