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topic 9
Assessing Pollution
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Cards (4)
Indicator
species like bloodworms and
sludgeworms
can assess
water pollution
levels, while
freshwater shrimps
and
stonefly
indicate
clean water
Lichen
and
Blackspot
fungus asses the
levels
of
pollution
by
indicating levels
of
SO2
in the
air
by the presence of
lichen
and
black spots
on
leaves
Freshwater
shrimp,
Stone
fly and
Dragon
fly asses the levels of
high oxygen
in the water.
More of these organisms in the water =
higher O2
levels in water
Bloodworm
and
sludge
worm assess the low levels of
CO2
in the
water.
More of these organisms = lower levels of
O2
in the
water