Keeping Great Pond $$Golden$$: The Belgrade Lakes Project

Transcription

1 Keeping Great Pond $$Golden$$: The Belgrade Lakes Project D. Whitney King, Cathy Bevier, Denise Bruesewitz, Russ Cole, Sahan Dissanayake, Philip Nyhus, James Fleming, Michael Donihue, Bruce Rueger 1, Maggie Shannon 2, Charlie Baeder, Peter Kallin 3, Kathi Wall, Lisa Hallee 4, Brenda Fekete 1 Colby College, 2 Maine Lakes Society, 3 Belgrade Regional Conservation Alliance, 4 Maine Lakes Resource Center Supported by National Science Foundation award #EPS to Maine EPSCoR at the University of Maine VLMP

2 Links of Interest Interactive Lake Data Page: Water flow animation: Live Buoy Data:

3 A Maine Sense of Place - with economic value of billions of dollars

4 Stakeholder Perceptions of Water Quality

5 48 $$$ 12 Hydrology of the Belgrade Lake Chain 28 $$$ East Pond North Pond $$$ Salmon Lake McGrath Pond Great Pond $$$ 4 8 $$$ 3 Long Pond - North Snow Pond Long Pond - South

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7 Life is controlled by the limiting reagent How many bicycles can I make from three wheels and two frames?????

8 Volunteer Science 1988

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11 Anoxic Factor (AF) = (anoxic area/ lake area) * days of anoxia AF provides an estimate of internal phosphorus loading 12 mg P/m 2 day of anoxic area <10 is good, 20 is a concern, 30 is bad, 50+ is awful Oxygen above 2 ppm Depth of anoxia Oxygen below 2 ppm Nurnberg, G. K ScienceWorld 4:42

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13 Clear Water Lake

14 China Lake

15 Long Pond station 1

16 Great Pond Station 2

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18 Deep Lakes good concern bad awful Shallow Lakes Belgrade Lakes Nurnberg, G. K ScienceWorld 4:42

19 Stop Studying the Problem and Fix It!

20 The 2015 Research Team

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22 Great Pond Depth (M) vs temp F Depth (M) vs % RDO /3/15 5/8/15 5/13/15 6/3/15 6/12/15 6/17/15 6/22/15 6/29/15 7/6/15 7/16/15 7/23/15 7/30/15 8/6/15 8/12/15 8/20/15

23 Dissolved Oxygen (PPM) Great Pond Depth (meters) Julian Day (210 = 8/1/1989)

24 Great Pond 26 ºC 24ºC 22ºC 20ºC 18ºC 16ºC 14ºC 12ºC 10ºC 8ºC 6ºC 12 ppm 11 ppm 10 ppm 9 ppm 8 ppm 7 ppm 6 ppm 5 ppm 4 ppm 3 ppm 2 ppm May-8 May-13 Temperature (ºC) by Depth (M) Jun-3 Jun-12 Jun-17 Jun-22 Jun-29 Jul-6 Jul-16 Jul-23 Jul-30 Aug-6 Aug-12 Aug-20 May-8 May-13 Jun-3 RDO (ppm) by Depth (M) Jun-12 Jun-17 Jun-22 Jun-29 Jul-6 Jul-16 Jul-23 Jul-30 Aug-6 Aug-12 Aug-20

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29 Great Pond 26 ºC 24ºC 22ºC 20ºC 18ºC 16ºC 14ºC 12ºC 10ºC 8ºC 6ºC 12 ppm 11 ppm 10 ppm 9 ppm 8 ppm 7 ppm 6 ppm 5 ppm 4 ppm 3 ppm 2 ppm May-8 May-13 Temperature (ºC) by Depth (M) Jun-3 Jun-12 Jun-17 Jun-22 Jun-29 Jul-6 Jul-16 Jul-23 Jul-30 Aug-6 Aug-12 Aug-20 May-8 May-13 Jun-3 RDO (ppm) by Depth (M) Jun-12 Jun-17 Jun-22 Jun-29 Jul-6 Jul-16 Jul-23 Jul-30 Aug-6 Aug-12 Aug-20

30 0 Fraction of Lake Area (10 cm layer) Cumulative Lake Area Depth in Meters Depth in Meters Great Pond - Belgrade Maine

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32 Additional slides on high frequency data buoys!

33 Healthy Lake Phosphorus Flows must balance + O 2 Inflow + NP Sources + Internal Load < Outflow + Burial Fe(II) + -PO 4

34 hv hv

35 Building our website with the community in mind SDL500 Data Logger

36 Data sent to Colby s server Goldie measures every 15 minutes Weather data sent to Colby s server Dynamic Graphs created in HighChart and displayed on web Graphs created in LabView LabView integrates data

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38 Additional slides

39 Light (I) Free Water productivity measurements Light (I) Wind (U) Gas exchange Oxygen (blue) algae (green) Z mix GPP Gross Primary Productivity (function of light) R Respiration F Gas Exchange Temperature (yellow) Hanson et al L&O Methods 6: 454 Solomon, Bruesewitz et al L&O 58(3): 849

40 Free-Water Metabolism

41 Light (I) Free Water productivity measurements Light (I) Wind (U) Gas exchange Oxygen (blue) algae (green) Z mix GPP Gross Primary Productivity (function of light) {1 mg O 2 /L day} R Respiration {0.7 mg O 2 /L day} F Gas Exchange {0.1 mg O 2 /L day} NPP (net primary productivity) = GPP R {0.3 mg O 2 /L day} Temperature (yellow) Hanson et al L&O Methods 6: 454 Solomon, Bruesewitz et al L&O 58(3): 849

42 Light (I) Free Water productivity measurements Light (I) Wind (U) Gas exchange GPP Oxygen (blue) algae (green) R O 2 Z mix NPP CH 2 O + O 2 CO 2 + H 2 O Deep water oxygen sink NPP (net primary productivity) = GPP R {0.3 mg O 2 /L day}

43 Light (I) Free Water productivity measurements Light (I) Wind (U) Gas exchange GPP Oxygen (blue) algae (green) R O 2 NPP 0.3 mg O 2 /L day Z mix 1x10 11 L 30,000 kg O 2 /day CH 2 O + O 2 CO 2 + H 2 O Deep water oxygen sink 0.7x10 11 L 800,000 kg O 2 800,000 kg O 2 /30,000 kg O 2 /day = 27 days to anoxia

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