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Macroinvertebrates. Little Creatures that tell us If our natural waterways are healthy. Benthic Macroinvertebrates. Benthic means: living at the bottom of a body of water (stream, river, pond) Macro- large Invertebrate- animal without backbone

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macroinvertebrates

Macroinvertebrates

Little Creatures that tell us

If our natural waterways are healthy

benthic macroinvertebrates
Benthic Macroinvertebrates
  • Benthic means: living at the bottom of a body of water (stream, river, pond)
  • Macro- large
  • Invertebrate- animal without backbone
  • Macroinvertebrate- large water dwelling invertebrate able to be seen without a microscope
what are macroinvertebrates
What are Macroinvertebrates?
  • Organisms that have no backbone
  • Visible without a microscope
  • Found in Fresh Water Streams
  • Eats leaves & algae in stream
  • Source of Energy for larger animals
what are macroinvertebrates1
What are Macroinvertebrates?
  • Snails
  • Crayfish
  • Worms
  • Fly larva
  • Mayfly, caddisfly, stone fly larva
  • Clams
  • Water beetles
indicator species
Indicator Species
  • Indicator Species means…
  • They tell scientists when there is a problem in nature- specifically the stream environment
  • The problem being pollution
why are macroinvertebrates important
Why are Macroinvertebrates Important?
  • Source of Energy for larger animals
  • Brook Trout or other fish eats them…
  • Then fish are eaten by birds, raccoons, humans
  • Helps with the Food Web
where do macroinvertebrates live
Where do Macroinvertebrates live?
  • Bottom of a Stream
  • Attached to rocks
  • Attached to plants
  • In fast moving water, need oxygen
  • http://www.epa.gov/owow/nps/kids/masterbugtheater.html
why are macroinvertebrates important1
Why are Macroinvertebrates Important?
  • They are good indicators of the stream’s overall health
  • These animals are different sizes, shapes, and have different adaptations that make it easy for scientists to learn if a stream is healthy
why do they need clean water
Why do they need clean water?
  • To survive the macroinvertebrates that show that the water is clean need…
    • Lots of oxygen to survive
    • Poor oxygen, they die and provide no food for the Trout, kingfishers, Salmon, etc.
    • Those macroinvertebrates that need poor dirty water to survive- tell scientists that the water is polluted
what do macroinvertebrates tell scientists about a stream
What do Macroinvertebrates tell Scientists about a Stream?
  • Some macroinvertebrates are only found in Healthy untouched waters- not polluted- these tell scientists that the water is pure and good
  • Others are found in moderate or OK waters- these may have some pollutants- they tell the scientists that the water is starting to get worse
  • Also other macroinvertebrates only survive in poor water, this tells scientists that the water quality is poor and needs help
which macroinvertebrates tell that there is good quality water
Which Macroinvertebrates tell that there is good quality water?
  • Different kinds of stoneflies, mayflies, and caddisflies tell a scientist the stream is healthy.
  • Scientists look for a variety of the above
which macroinvertebrates do you find in a moderately clean stream
Which macroinvertebrates do you find in a Moderately clean Stream?
  • The number of different macroinvertebrates becomes less as pollution rises
  • There will be fewer stoneflies, many fewer mayflies, and only some types of caddisflies
  • Soft-bodied worms and fly larva also increase
  • Beetles are probably still in the stream; mollusks are not.
what macroinvertebrates are in poor quality streams
What macroinvertebrates are in poor quality streams?
  • Stoneflies are not present at all
  • A few mayflies and caddisflies- maybe there
  • Most found are soft-bodied animals: fly larvae, leeches and planaria (round worm, tape worm).
  • Amphipod- fast moving shrimp looking creature
planaria flatworm
Planaria- Flatworm

http://www.watersheds.org/earth/enved.htm

macroinvertebrate means

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Macroinvertebrate means…
  • Small creature that you need a microscope to see
  • Small creature that you can see without a microscope
  • Small creature that lives on land
benthic means

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Benthic means…
  • Living at the bottom of a stream
  • Living on land, near a stream
  • Living by floating in a stream
a sample of a macroinvertebrate is

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A sample of a Macroinvertebrate is…
  • Small bird
  • Mayfly larva
  • Butterfly larva
  • Turtle
macroinvertebrates that survive in low oxygen water tell scientists

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Macroinvertebrates that survive in low oxygen water tell scientists
  • The water is polluted
  • The water is clean
  • That it is water
large amounts of caddisfly larva mayfly larva and stone fly larva are found in

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Large amounts of caddisfly larva, mayfly larva, and stone fly larva are found in…
  • Polluted water
  • Moderately clean water
  • Healthy, good quality water
slide24

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Smaller amounts of caddisfly, mayfly and stone fly larva, along with some worms are in this type of water
  • Polluted water
  • Moderately clean water
  • Healthy, good quality water
stoneflies are not present at all more leeches and fly larvae are found in this stream

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Stoneflies are not present at all, more leeches, and fly larvae are found in this stream
  • Polluted water
  • Moderately clean water
  • Healthy, good quality water