STREAM MACROINVERTEBRATES

Biotic Indicators Why are they Important? Easy to find and collect Easy to find and collect Live in water most of their life Live in water most of their life Stay in areas suitable for their survival Stay in areas suitable for their survival Easy to identify Easy to identify Differ in tolerance (Types and Amount of Pollution) Differ in tolerance (Types and Amount of Pollution)

3 Main Types of Insects Class I- Pollution Sensitive Class I- Pollution Sensitive found in good quality water examples: caddisfly found in good quality water examples: caddisfly mayfly mayfly dobsonfly dobsonfly water penny water penny

3 Main Types of Insects Class II- Moderate Pollution Tolerance, found in good or fair quality waters Class II- Moderate Pollution Tolerance, found in good or fair quality waters examples: damselfly examples: damselfly scud scud crayfish crayfish crane fly crane fly

3 Main Types of Insects Class III- Pollution Tolerant, found in all types of water Class III- Pollution Tolerant, found in all types of water examples: black fly examples: black fly leeches leeches aquatic worms aquatic worms pouch snails pouch snails

Pollution Sensitive Macroinvertebrates Class I Insects

Order: Trichoptera Caddisflies

Fingernet Caddis Free living Caddis

Order: Trichoptera Caddisflies Net-spinning Caddisfly

Order: Trichoptera Caddisflies Adults

Order Ephemeroptera Mayflies Nymph Adult

Order: Megaloptera Dobsonflies/Alderflies Dobsonfly (Hellgrammite)

Order: Megaloptera Dobsonflies/Alderflies Alderfly

Order: Megaloptera Dobsonflies/Alderflies Dobsonfly Adult Alderfly Adult

Order: Plecoptera Stoneflies Nymphs Adult

Order: Coleoptera Water Penny

Order: Coleoptera Riffle Beetle Larva Adult

Class: Gastropoda Gilled Snails

Moderate Pollution Tolerant Macroinvertebrates Class II Insects

Order: Odonata Dragonfly Nymph

Order: Odonata Damselfly

Order: Odonata Dragonfly and Damselfly Dragonfly AdultDamselfly Adult

Order: Isopoda Sowbug

Order: Diptera Crane fly Larva Adult

Order: Amphipoda Scud

Order: Hemiptera Water Boatman

Order: Hemiptera Backswimmer

Order: Hemiptera Water Strider

Order: Hemiptera Water Scorpion

Order: Coleoptera Whirligig beetle Larva

Order: Coleoptera Whirligig beetle Adult

Order: Coleoptera Water Scavenger Beetle Adult

Order: Coleoptera Giant Water Beetle Adult

Order: Coleoptera Predacious Diving Beetle Adult Larva

Order: Decapoda Crayfish

Pollution Tolerant Macroinvertebrates Class III Insects

Order: Diptera Black Fly Adult Larva

Class: Hirudinea Leeches

Phylum: Annelida Aquatic Worms Oligochaete

Phylum: Platyhelminthes Planaria

Class: Gastropoda Pouch (Pond) Snails

Order: Chironomidae Midges

Order: Chironomidae True Midges (non-biting)

Order: Chironomidae Biting Midge

Class: Gastropoda Orb Snail

Order: Pelecypoda Clams Corbicula Fingernail clam