FUNCTIONAL FEEDING GROUP RATIOS AS INDICATORS OF STREAM ATTRIBUTES
Student Problem:Polk Valley Run: Herman's 12/9/99

Common Name	Family/ Genus	Number of Organisms in Sample	Functional Feeding Group
Black Fly Larva	Simuliidae	104	filtering collector
Chironomid Midge Larva	Chironomidae	39	gathering collector
Common Cranefly larva	Tipula	7	shredder
Fingernet caddisfly larva	Chimarra	3	filtering collector
Netspinning Caddisfly larva	Hydropsyche	38	filtering collector
Giant Casemaking caddisfly	Phryganeidae	1	shredder
Northern Casemaking caddisfly	Pycnopsyche	1	shredder
Freeliving caddisfly	Rhycophila	3	predator
Riffle beetle larva	Optioservus	9	scraper
Ameltitus mayfly	Amelitus	29	scraper
Flatheaded mayfly larva	Stenonema	3	scraper
Slender winter stonefly	Capniidae	61	shredder
Taeniopterygid broadback stonefly	Taeniopterygidae	108	shredder
Common Stonefly	Acroneuria	2	predator
Clubtail dragonfly larva	Hagenius	1	predator
Snail	Planorbidae	2	scraper
Snail	Physidae	9	scraper
Total Individuals		420

(Source: Saucon Valley High School field data)
All Dominica lessons and photography © 1999 Lance Leonhardt