Lake Water Quality 2006 Report - Lakefield Herald

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18Chl a (ug/L)1260Pigeon Lake SPigeon Lake CPigeon Lake NSturgeon Lake SSturgeon Lake CSturgeon Lake NLovesick Lake 1Lovesick Lake 2Lovesick Lake 3Stony Lake 1Stony Lake 2Stony Lake 3Figure 2. Concentration of phytoplankton at sampled sites.We were very surprised to see such low concentrations of attached algae on theplants growing at Snug Harbour in Sturgeon Lake (Sturgeon Lake S) as this site hashistorically had some of the highest concentrations of total phosphorus throughoutthe Kawarthas. Looking at phytoplankton concentrations (Figure 2) may offer apossible explanation. This same site had the highest concentrations of phytoplanktonby several orders of magnitude. Thus the relatively low amount of epiphytes andmetaphyton associated with the macrophytes at Snug Harbour is likely related to amore turbid water column where light is a limiting factor for successful growth. Toput those numbers in context, chlorophyll a concentrations in the pea-soup days ofthe Great Lakes routinely exceeded 100 µg . L -1 . As you can see from Figure 2, thiswas many times higher than today’s levels.50
Are our lakes at risk of switching from a macrophyte dominated state to aphytoplankton dominated state? This study has certainly provided us with a baselinethat subsequent years of observation can build upon, but it doesn’t allow us to drawconclusions as to where the lakes will go in the future. As is the case with manyecological monitoring exercises, this has raised more questions, which we hope toaddress in the coming years. As we carry out macrophyte monitoring activities onsome of the Kawartha Lakes, we enjoy hearing (and have come to depend upon) theobservations of shoreline residents as they are out taking advantage of these rareand beautiful Kawartha Lakes.Wynona Marleau is a recent graduate of Trent University with an Honours B.Sc. in Biology. Dr. EricSager is a research associate at Trent University, manager of the Oliver Ecological Centre, and KLSA’sscientific advisor.51
Page 1: Kawartha Lake Stewards AssociationW
Page 4 and 5: Table of ContentsPresident’s Mess
Page 6 and 7: President’s Message2007 will be t
Page 8 and 9: species-at-risk and shoreline and i
Page 10: There are 3 different “phosphorus
Page 13 and 14: Map of the Kawartha Lakes 2006 Test
Page 15 and 16: subsequently deposited formations n
Page 17 and 18: These problems were solved with the
Page 19 and 20: Burleigh fallsThe cataracts effecti
Page 21 and 22: to estimate how much phosphorus is
Page 23 and 24: levels of these two inflows. Big Ba
Page 25 and 26: Low Phosphorus Lakes35.0030.0025.00
Page 27 and 28: The high flow/low phosphorus theory
Page 29 and 30: Phosphorus Levels over 5 Years (eac
Page 31 and 32: Flow vs Phosphorus, 200530030Flow,
Page 33 and 34: Many other sources of phosphorus to
Page 35 and 36: eductions in phosphorus discharges
Page 37 and 38: Ontario’s Natural Resources and V
Page 39 and 40: the Base Flow Index (BFI) and perce
Page 41 and 42: systems and animal feces (beef, pou
Page 43 and 44: ANOVA analysis as no suitable data
Page 45 and 46: 3530Phosphorus (µg/l)252015105a ab
Page 47 and 48: How Much Algae Sticks to Macrophyte
Page 49 and 50: sites for both lakes (Pigeon Lake S
Page 51: The results from our initial survey
Page 55 and 56: Generally, then, the water in the K
Page 59 and 60: Appendix A:KLSA Mission Statement,
Page 61 and 62: Appendix B: Financial PartnersParks
Page 63: Date Expenses04-Jan-06 Bank Fees 3.
Page 68 and 69: At your request, subject to applica
Page 70 and 71: Lake-by-Lake E.coli ResultsTo put t
Page 72 and 73: To put the results in perspective:
Page 84 and 85: LAKE NAME Site Description DateSecc
Page 90 and 91: Appendix G: GlossaryAquatic plants
Page 92 and 93: plants. In the Kawartha Lakes area,

Lake Water Quality 2006 Report - Lakefield Herald

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