Figure 4.9 Procedures for Collecting a Macroinvertebrate Sample in a Rocky-bottom Stream

Water: Monitoring & Assessment

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1. Approach the sample site from the downstream end.	4. Disturb 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.