Macroinvertebrates - PowerPoint PPT Presentation

1 / 25
About This Presentation
Title:

Macroinvertebrates

Description:

Macroinvertebrates Little Creatures that tell us If our natural waterways are healthy Benthic Macroinvertebrates Benthic means: living at the bottom of a body of ... – PowerPoint PPT presentation

Number of Views:56
Avg rating:3.0/5.0
Slides: 26
Provided by: sernst
Learn more at: http://www.whrhs.org
Category:

less

Transcript and Presenter's Notes

Title: Macroinvertebrates


1
Macroinvertebrates
  • Little Creatures that tell us
  • If our natural waterways are healthy

2
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

3
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

4
What are Macroinvertebrates?
  • Snails
  • Crayfish
  • Worms
  • Fly larva
  • Mayfly, caddisfly, stone fly larva
  • Clams
  • Water beetles

5
Indicator Species
  • Indicator Species means
  • They tell scientists when there is a problem in
    nature- specifically the stream environment
  • The problem being pollution

6
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

7
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

8
Why are Macroinvertebrates Important?
  • They are good indicators of the streams 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

9
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

10
Macroinvertebrates
11
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

12
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

13
Stonefly Larva
14
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.

15
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

16
Planaria- Flatworm
http//www.watersheds.org/earth/enved.htm
17
Macroinvertebrate means
  1. Small creature that you need a microscope to see
  2. Small creature that you can see without a
    microscope
  3. Small creature that lives on land

18
Benthic means
  1. Living at the bottom of a stream
  2. Living on land, near a stream
  3. Living by floating in a stream

19
Macroinvertebrates tell if a stream is healthy or
not.
  1. True
  2. False
  3. Unsure

20
A sample of a Macroinvertebrate is
  1. Small bird
  2. Mayfly larva
  3. Butterfly larva
  4. Turtle

21
Macroinvertebrates that tell if water is clean
need only a little bit of oxygen
  1. True
  2. False

22
Macroinvertebrates that survive in low oxygen
water tell scientists
  1. The water is polluted
  2. The water is clean
  3. That it is water

23
Large amounts of caddisfly larva, mayfly larva,
and stone fly larva are found in
  1. Polluted water
  2. Moderately clean water
  3. Healthy, good quality water

24
Smaller amounts of caddisfly, mayfly and stone
fly larva, along with some worms are in this type
of water
  1. Polluted water
  2. Moderately clean water
  3. Healthy, good quality water

25
Stoneflies are not present at all, more leeches,
and fly larvae are found in this stream
  1. Polluted water
  2. Moderately clean water
  3. Healthy, good quality water
Write a Comment
User Comments (0)
About PowerShow.com