Comparative Limnology of Honeoye, Canandaigua, Keuka, Seneca, Cayuga, Owasco & Skaneateles Lakes 2005 - 2007 John D Halfman Environmental Studies Program.

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Presentation transcript:

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

Research Focus: Watershed  Lake Interactions Impact of Land Use & Bedrock Geology Limestone vs. Shales & Sandstones Sedimentary Rocks Forested vs. Agricultural Landscapes BedrockLand Use

Sampling Scheme Sampling Schedule Sampling Schedule –Since 2005 –Monthly: May through Oct –At Least Two Deep-Water Sites Parameters Parameters –CTD Cast (SeaBird SBE-25) Cond, Temp, Depth, Turb, Chlro, DO, pH Cond, Temp, Depth, Turb, Chlro, DO, pH –Secchi Disc Depth –Surface & Bottom Water Analyses Total Phosphates Total Phosphates –2006 & 2007 Dissolved Phosphates Dissolved Phosphates Nitrates & Silica Nitrates & Silica Chlorophyll-a Chlorophyll-a Total Suspended Solids Total Suspended Solids Total Coliform & E. coli Bacteria Total Coliform & E. coli Bacteria –2005 only Major Ions (Na, K, Ca, Mg, Cl, SO 4 ) Major Ions (Na, K, Ca, Mg, Cl, SO 4 ) Seneca Lake Since Sites & Streams Owasco Lake 11 Lake Sites & Streams 2006 & 2007 Cayuga Lake 9 Lake Sites

CTD Profiles New CTD Temperature m Thermocline Specific Conductance Epilimnion Dilution Fluorescence Surface Algae

Surface Dilution?

Subsurface Algae

Nepheloid Layers

Owasco Lake Owasco Inlet Impact Lake Stream Halfman, Holler & Philip, 2006, A preliminary water quality study of Owasco Lake, NY and its watershed. Emerson Foundation

2007 – Owasco Lake & Stream Data See Poster by Evan Brown Lake Stream Groton From: Bruce Natale, CC WQMA Chair Groton Wastewater Effluent

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

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

Phosphates SRP & TP

Nitrates

Water Quality Ranking Ranked Each Parameter Chl, TSS, TP ( ), SRP, N, Si, Secchi, Bacteria (only 2005) Calculated a Mean Rank (1-7) Lake2005* Honeoye Canandaigua Keuka Seneca (no bacteria) 3.0 Cayuga (no bacteria) 3.6 Owasco Skaneateles *Modified from: Halfman & Bush, 2006, A preliminary water quality study of selected Finger Lakes, NY. FL-Data Halfman_Bush.pdf FL-Data

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

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

Thanks - Questions? John Halfman, Environmental Studies, Geoscience, FLI, HWS Data At: