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Zooplankton and Benthos

Zooplankton and Benthos. Robert Owen and Leah Taylor EFB 525. http://www.aslo.org/photopost/data/508/74Daphnia_hispanica_-_ephF.jpg. Background. Zooplankton: Planktonic animals ranging in size from rotifers to jellyfish Nutrient cycling machine Increases feeding efficiency

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Zooplankton and Benthos

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  1. Zooplankton and Benthos Robert Owen and Leah Taylor EFB 525 http://www.aslo.org/photopost/data/508/74Daphnia_hispanica_-_ephF.jpg

  2. Background • Zooplankton: Planktonic animals ranging in size from rotifers to jellyfish • Nutrient cycling machine • Increases feeding efficiency • Benthos: aggregation of organisms living on the bottom of a body of water • Break down settled organic matter

  3. Indicators? • Zooplankton and Benthos: high sensitivity to environmental change and short life span • Zoop is an indicator of future fisheries health • they are a food source for organisms at higher trophic levels • Benthos is an indicator of environmental stress • live in sediments where they are exposed to environmental stressors with limited mobility

  4. Similarity

  5. Contrast

  6. Unique Cases

  7. Species Richness Hall of Fame Number of zooplankton in whole lake sampling

  8. Benthic Trends • Not data for all lakes

  9. Benthic Trends • Not data for all lakes • Similar organisms found in two Adirondack lakes

  10. Benthic Trends • Not data for all lakes • Similar organisms found in two Adirondack lakes • Oneida lake was the most diverse

  11. Benthic Richness Number of Benthic organisms in all samples

  12. Adirondack Benthos http://www.mikrojezioro.met.pl/atlas_zw/arch_foto/muchowki/Chaoborus%20_bscuripes.jpg Chaoborus • Also called “glassworms” or “phantom midges”

  13. Adirondack Benthos http://www.mikrojezioro.met.pl/atlas_zw/arch_foto/muchowki/Chaoborus%20_bscuripes.jpg Chaoborus • Also called “glassworms” or “phantom midges” • Black structures are air bladders

  14. Adirondack Benthos http://www.mikrojezioro.met.pl/atlas_zw/arch_foto/muchowki/Chaoborus%20_bscuripes.jpg Chaoborus • Also called “glassworms” or “phantom midges” • Black structures are air bladders • Tolerant of poor water conditons

  15. Adirondack Benthos Chironomus • Also called “bloodworms” http://www.unk.edu/acad/biology/hoback/marineinsects/oxygen_problem.htm

  16. Adirondack Benthos Chironomus • Also called “bloodworms” • Contain hemoglobin http://www.unk.edu/acad/biology/hoback/marineinsects/oxygen_problem.htm

  17. Oneida Lake • Benthos samples contained : - True fly larvae • Aquatic earthworms • Snails, Scuds, and Side Swimmers www.sacsplash.org/critters/snails.htm

  18. Questions? http://www.southernadirondackpines.com/Seasons/Fall%20Foliage%20at%20SAP.htm

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