Dragonflies & Mosquitoes: Their role in the ecosystem.

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Presentation transcript:

Dragonflies & Mosquitoes: Their role in the ecosystem

Why do insects matter? Large Biomass! Feed salmon! Important for evaluating stream/river health!

Idaho State University What’s in a Stream?

Feeding Groups Grazers – Algae Shredders – Leaves, Plants, Wood Collectors – Particles Predators – Other insects

Grazers Ephemeroptera (Mayflies)

Shredders Plectoptera (Stoneflies) Trichoptera (Caddisflies)

Collectors BlackfliesCaddisflies MidgesMosquitoes

Predators Diving Beetles Backswimmers Dragonflies & Damselflies

Food For Everyone! Idaho State University

Insects & Salmon Spawning salmon fertilize streams Terrestrial & aquatic insects feed juvenile salmon

Riparian Zone Provide food for fish! Provide food for insects Provide Shelter for fish! Help regulate discharge Regulate temperatures University of Nevada, Reno

Using Insects For Water Quality Diversity Density Pollution Tolerance - EPT = Ephemeroptera + Plectopera + Trichoptera “Mayflies” “Stoneflies” “Caddisflies” Show long term effects OARS

Questions?

Dragonflies vs Damselflies

Photos Sources