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John D Halfman Environmental Studies Program Department of Geoscience Finger Lakes Institute

Comparative Limnology of Honeoye, Canandaigua, Keuka, Seneca, Cayuga, Owasco & Skaneateles Lakes 2005 - 2007. John D Halfman Environmental Studies Program Department of Geoscience Finger Lakes Institute 3 rd Annual Finger Lakes Research Conference.

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John D Halfman Environmental Studies Program Department of Geoscience Finger Lakes Institute

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  1. Comparative Limnology of Honeoye, Canandaigua, Keuka, Seneca, Cayuga, Owasco & Skaneateles Lakes2005 - 2007 John D HalfmanEnvironmental Studies ProgramDepartment of GeoscienceFinger Lakes Institute 3rd Annual Finger Lakes Research Conference

  2. Research Focus:Watershed  Lake InteractionsImpact of Land Use & Bedrock Geology Bedrock Land Use Limestone vs. Shales & SandstonesSedimentary Rocks Forested vs. AgriculturalLandscapes

  3. Sampling Scheme • Sampling Schedule • Since 2005 • Monthly: May through Oct • At Least Two Deep-Water Sites • Parameters • CTD Cast (SeaBird SBE-25) • Cond, Temp, Depth, Turb, Chlro, DO, pH • Secchi Disc Depth • Surface & Bottom Water Analyses • Total Phosphates • 2006 & 2007 • Dissolved Phosphates • Nitrates & Silica • Chlorophyll-a • Total Suspended Solids • Total Coliform & E. coli Bacteria • 2005 only • Major Ions (Na, K, Ca, Mg, Cl, SO4) Seneca Lake Since 1994 4 Sites & Streams Owasco Lake11 Lake Sites & Streams 2006 & 2007Cayuga Lake 9 Lake Sites

  4. Temperature10-20 m ThermoclineSpecific ConductanceEpilimnion DilutionFluorescenceSurface Algae CTD ProfilesNew CTD

  5. Surface Dilution?

  6. Subsurface Algae

  7. Nepheloid Layers

  8. Stream Owasco Lake - 2006Owasco InletImpact Lake 94 125 608 Emerson Foundation Halfman, Holler & Philip, 2006, A preliminary water quality study of Owasco Lake, NY and its watershed. http://fli.hws.edu/pdf/halfman_owasco.pdf

  9. 2007 – Owasco Lake & Stream DataSee Poster by Evan Brown Groton Wastewater Effluent Lake From: Bruce Natale, CC WQMA Chair Stream 2006 2007 Groton Groton

  10. Other Owasco Watershed Talks • Susan Cushman, HWS Stream Biotic Integrity • Bruce Gilman, FLCC Macrophyte Communities • Mark Leopold, Cornell Amphipods & Zebra Mussels • Emily Runnells, HWS Zooplankton & Water Quality • Melissa Balk, HWS Invasive Zooplankton

  11. Algae (TSS, Secchi) Algae Largest Surface Water Honeoye Smallest Bottom Water Skaneateles

  12. PhosphatesSRP & TP

  13. Nitrates

  14. Water Quality Ranking Ranked Each ParameterChl, TSS, TP (2006-07), SRP, N, Si, Secchi, Bacteria (only 2005) Calculated a Mean Rank (1-7) *Modified from: Halfman & Bush, 2006, A preliminary water quality study of selected Finger Lakes, NY. http://people.hws.edu/halfman/FL-Lim/2005 FL-Data Halfman_Bush.pdf

  15. Graphically… 2007: Less Rain – Less Nutrient Runoff - Impacts Faster Residence Time Lakes

  16. Lakes do Change! Nutrient Loading? Zebra Introduced Zebra Die Off Zebra & Quagga Rebound

  17. Thanks - Questions? John Halfman, Environmental Studies, Geoscience, FLI, HWSData At: http://people.hws.edu/halfman/FL-Lim/FL-Limnology.htm

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