Qualitative Habitat Evaluation Index

SUBSTRATE METRIC:

The substance, base, or nutrient on which, or the medium in which, a fixed organism is attached. Substrate types include soil, rocks, water, and leaf tissues.


SUBSTRATE QUALITY: EMBEDDEDNESS

(The degree in which the rocks and cobble are stuck in the stream. If you can pick up the rocks and a cloud of material floats away embeddedness is normal.)







EXTENSIVE [-2]

Greater than 75% of site area

Substrate: Embeddedness



MODERATE [-1]

50 to 75% of the site area.

Substrate: Embeddedness



NORMAL [0]

25 to 50% of the site area.

Substrate: Embeddedness



NONE [1]

Less than 25% of the site area.

Substrate: Embeddedness