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Below are links to photos that illustrate techniques covered in the guidance document:
Benthic Macroinvertebrate Biological Monitoring Protocols for Rivers and Streams: 2001 Revision
| Photo (click to enlarge) |
Activity description |
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Using a D-net collector (disturbing the substrate). |
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Using a D-net collector (scrubbing the substrate). |
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Using a D-net collector (splashing the catch to the bottom of the net). |
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Using a D-net collector (tranferring the catch to a storage jar). |
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Measuring wetted width. |
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Measuring bankful width. |
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Measuring canopy cover. |
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Measuring canopy cover (close-up of densiometer). |
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Measuring gradient. |
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Measuring gradient (close-up of gradient meter). |
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Counting substrate percentages. |
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Counting substrate percentages (close-up). |
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Looking down into the substrate viewer. |
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Measuring velocity at the riffle. |
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Dissolved oxygen preparation in the field. |
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Counting taxa in the lab. |
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Counting taxa in the lab (close-up of petri dish). |
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