Volunteer Stream Monitoring: A Methods Manual

Figure 4.9

Back to Chapter 4.2 - Streamside Biosurvey Back to Chapter 4.3 - Intensive Stream Biosurvey

1. Approach the sample site from the downstream end.
Approach sample 4. Distrub the substrate thoroughly with your feet.
Disturb substrate Figure 4.9

Procedures for collecting a macroinvertebrate sample in a rocky-bottom stream
Volunteers must follow set protocol to collect an unbiased sample.

2. Position the net at a 45° angle with the bottom tight against the substrate.
Position net 5. Remove the net with a forward scooping motion.
Remove net

3. Dislodge macroinvertebrates by rubbing rocks thoroughly.
6. Flush out the net with clean stream water.
Flush net

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1. Approach the sample site from the downstream end.	4. Distrub the substrate thoroughly with your feet.	Figure 4.9 Procedures for collecting a macroinvertebrate sample in a rocky-bottom stream Volunteers must follow set protocol to collect an unbiased sample.
2. Position the net at a 45° angle with the bottom tight against the substrate.	5. Remove the net with a forward scooping motion.
3. Dislodge macroinvertebrates by rubbing rocks thoroughly.	6. Flush out the net with clean stream water.