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Bridging the Watershed An Outreach Program of the Alice Ferguson Foundation in Partnership with the National Park Servi

Bridging the Watershed An Outreach Program of the Alice Ferguson Foundation in Partnership with the National Park Service and Area Schools. Water Canaries Assessing Benthic Macroinvertebrates. Macroinvertebrate Identification Worksheet. Specimen # _____ Characteristics

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Bridging the Watershed An Outreach Program of the Alice Ferguson Foundation in Partnership with the National Park Servi

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  1. Bridging the WatershedAn Outreach Program of the Alice Ferguson Foundation in Partnership with the National Park Service and Area Schools Water Canaries Assessing Benthic Macroinvertebrates

  2. Macroinvertebrate Identification Worksheet Specimen # _____ Characteristics Body shape_________________ Legs ______________________ Tail _______________________ Other features _______________ Sketch

  3. Consider the following when trying to identify an organism

  4. Macroinvertebrate Body Characteristics Segments Wormlike– Is the abdomen fleshy or have armored plates? Does it look easily squishable? Segmented critters Not wormlike Tiny—in nature, tiny generally means less than a centimeter—test to tell: do you have a hard time seeing anything more than a squiggly line? Large and plump

  5. Legs Six true legs plus lateral filaments Six segmented legs Prolegs More than six legs

  6. Tails Tail-like projection Featherlike tails No tail or tiny tail Two tails

  7. Details to notice: gills Abdominal filamentous gills Abdominal gills Internal gills

  8. Practice ID • Visible Gills? • Legs? Number? Length? Placement? • Details? Antennae? Eyes? Wings? Tail?

  9. Directions You will be shown pictures/drawings of 15 different types of organisms. Each slide will be visible for 2 minutes. Use your worksheet to draw each specimen. Begin with basic body shape and most important details. If there is more than one image on a slide, choose one to draw. Each organism or set of organisms represents one category that corresponds to the data sheet you will use in your field study.

  10. Specimen 1

  11. Specimen 2

  12. Specimen 3

  13. Specimen 4

  14. Specimen 5

  15. Specimen 6

  16. Specimen 7

  17. Specimen 8

  18. Specimen 9

  19. Specimen 10

  20. Specimen 11

  21. Specimen 12

  22. Specimen 13

  23. Specimen 14

  24. Specimen 15

  25. End of Drawing Activity Use your drawings and reference material to identify your organisms.

  26. Benthic macroinvertebrates can be classified according to their sensitivity to pollutants.

  27. Sensitive Mayfly larvae Stone Fly larvae Most caddisfly larvae Beetles (adults and larvae)

  28. Somewhat Sensitive Dragonfly and damselfly larvae Netspinner caddisfly larvae Crayfish Gilled snails Aquatic sowbugs Scuds Clams and mussels True fly larvae Hellgrammites, Fishfly and Alderfly larvae

  29. Tolerant Lunged snails Black fly larvae Midge larvae Aquatic worms Flatworms Leeches

  30. THE END

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