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Biological Properties. Biological attributes of a waterway can be important indicators of water quality. Biological attributes refer to the number and.

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Presentation on theme: "Biological Properties. Biological attributes of a waterway can be important indicators of water quality. Biological attributes refer to the number and."— Presentation transcript:

1 Biological Properties

2 Biological attributes of a waterway can be important indicators of water quality. Biological attributes refer to the number and types of organisms that inhabit a waterway. The poorer the quality of water, the fewer the number and types of organisms that can live in it.number and types of organisms

3 Great candidates for biological monitoring… Benthic Macroinvertebrates Heptageniidae sp. (Mayfly larva) Hydropsyche sp. (Caddisfly larva) Perlodidae sp. (Stonefly larva) (bottom-dwelling)(animals w/o backbones visible to naked eye) (bottom-dwelling) (animals w/o backbones visible to naked eye)

4 Macroinvertebrates as Indicators Limited migration patterns–good indicators of localized conditions and site-specific impacts Easy to sample and identify Broad range of habitat requirements and sensitivities to pollution

5 The Tolerance Index most pollution sensitive e.g. Stoneflies 010 most pollution tolerant e.g. Midges & Leeches require high DO, clear water, rocky cobble substrate contain hemoglobin, tolerate lower DO, prefer soft substrate, less sensitive to toxins

6 Stonefly Water Penny Beetle Mayfly Dobsonfly Alderfly Mussel Snipe Fly Riffle Beetle Macroinvertebrates as Indicators Pollution Sensitive ( “ Clean Water ” ) Benthos

7 Macroinvertebrates as Indicators Blackfly Caddisfly Isopod Cranefly Damselfly Dragonfly Crayfish Amphipod Somewhat Pollution Tolerant Benthos

8 Macroinvertebrates as Indicators Pouch Snail Midgefly Worm Leech Pollution Tolerant ( “ Polluted Water ” ) Benthos

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