water quality - freshwater invertebrates (classes)

class/importance as indicator

Mayfly; class/importance as indicator

class 1, presence indicates good water quality

caddisfly; class/importance as indicator, sensitive to?

class 1, presence indicates good water quality, pollution

stonefly; class/importance as indicator, sensitive to?

class 1, presence indicates good water quality, low oxygen levels

dobsonfly; class/importance as indicator

class 1, presence indicates good water quality

gilled snails; class/importance as indicator,

class 1, presence indicates good water quality

water penny; class/importance as indicator,

class 1, presence indicates good water quality

riffle beetle; class/importance as indicator,

class 1, presence indicates good water quality

water scorpion; class/importance as indicator,

class 1, presence indicates good water quality

aquatic sowbug; class/importance as indicator,

class 2, moderately polluted

damselfly; class/importance as indicator, sensitive to?

class 2, moderately polluted, moderately sensitive to pollution

dragonfly; class/importance as indicator,

class 2, moderately polluted, sensitive to pollutants

scuds; class/importance as indicator, sensitive to?

class 2, moderately polluted, heavy metals

crane fly; class/importance as indicator, sensitive to?

class 2, moderately polluted, sensitive to pollution

water mite; class/importance as indicator, sensitive to?

class 3, noticeable pollution & reduced oxygen, pollution & salty waters

midge; class/importance as indicator,

class 3, noticeable pollution & reduced oxygen,

blackfly; class/importance as indicator, sensitive to?

class 3, noticeable pollution & reduced oxygen, organic pollution

flatworm; class/importance as indicator,

class 3, noticeable pollution & reduced oxygen,

leeches; class/importance as indicator,

class 3, noticeable pollution & reduced oxygen,

air breathing snail; class/importance as indicator, sensitive to?

class 4, highly polluted, water temperature (higher temp reduces dissolved oxygen levels)

deer fly; class/importance as indicator,

class 4, highly polluted,

horse fly; class/importance as indicator,

class 4, highly polluted,

tubifex; class/importance as indicator,

class 4, highly polluted,

blood midge; class/importance as indicator,

class 4, highly polluted,

whirligig beetle; class/importance as indicator,

class 5, severe degradation

water strider; class/importance as indicator,

class 5, severe degradation

mosquito; class/importance as indicator,

class 5, severe degradation

giant water bug; class/importance as indicator,

class 5, severe degradation

back swimmer; class/importance as indicator,

class 5, severe degradation

water boatman; class/importance as indicator,

class 5, severe degradation

predacious diving beetle; class/importance as indicator,

class 5, severe degradation