WATERSHEDS -- While preparing my Sunday Outdoors story on the Trout in the Classroom program at Spokane County Schools, I was inspired by the men and women who helped teach the youngsters about fish, water and watersheds -- not to mention some tips on how to cast a fly line.
One of the coolest stations was the session on macro invertebrates headed by Brook Beeler of the Department of Ecology. Here's something to keep in mind:
CANARIES IN A FISH POND
Macro invertebrates (aquatic insects) are bio-indicators that help scientists assess water quality by surveying abundance of certain species based on their tolerance for water pollution. Examples:
Highly tolerant: Aquatic worms, leeches ØModerately tolerant: Dragonfly nymphs ØSuper intolerant: caddis flies, mayflies (and stoneflies in rivers)
Moderately tolerant: Dragonfly nymphs
Super intolerant: caddis flies, mayflies (and stoneflies in rivers)