NNWB Members doing Macroinvertebrate Monitoring
Getting set up
Searching and Separating
Getting set up
The Collecting
Searching and Separating
Getting set up
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Searching and Separating
Searching and Separating
The team examines and identifies the small animals without a backbone (benthic macro-invertebrate) using a microscope. They determine how many individuals of each type they found, and stop upon reaching 100. Findings are then returned alive to the stream.
mayflies stoneflies and caddisflies larvae indicate a healthy stream,
We also find crayfish, and larval forms of dragonflies, damselfies, beetles, true flies and others
Results are Determined
The health of a stream can be determined by the critters able to live there: Some require very clean water; another group can tolerate relatively poor water quality; and a third group lies in between. The Northwest Branch in lower Montgomery County is in the fair to poor range. Our mission continues to be to improve the health of our streams.
NNWB members conducting Water quality monitoring
Collecting samples for bacteria and turbidity
Measuring air temperature
Measuring water temperature
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
recording samples on the datasheet.
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
recording samples on the datasheet.
measuring pH.
Labeling a sample. The bacteria sample must be analyzed within 5 hours, so the label must have time
recording samples on the datasheet.