Long-term trends in major ions and nutrients in Lake Ontario
Keywords:
phosphorus, monitoring, Dreissena, water quality, transparency, calcium, chloride, nitrogen, sodium, silicaAbstract
The Great Lakes Surveillance Program has been monitoring water quality for almost 40 years in Lake Ontario. The program provides some of the most comprehensive, systematic and detailed information that is available in the world for such a large lake. The water quality in Lake Ontario has shown dramatic changes over the last 40 years, with the early measurements indicating high phosphorus concentrations that were subsequently reduced by management responses to the Great Lakes Water Quality Agreement. Other water quality parameters, such as some of the major ions, showed reductions during the 1970s and 1980s as well. Nitrate plus nitrite nitrogen has increased in the lake throughout the period of record, likely driven by increasing watershed and atmospheric sources. A major driver of more recent trends in water quality appears to be the invasion and subsequent expansion of invasive Dreissena mussel populations that first appeared in Lake Ontario in 1989. Total phosphorus concentrations have further declined, and the proportion of total phosphorus that is soluble is increasing, possibly due to the filtering action of these mussels. Concentrations of major ions that are incorporated in mussel shells such as calcium have declined, while those that do not, such as magnesium, have increased. Spring silica concentrations are increasing; an ominous signal of declining diatom populations, which may also be a symptom of the proliferation of invasive mussels in the lake.
References
Barbiero, R. P., Tuchman, M. L. and Millard, E. S. 2006. Post-dreissenid increases in transparency during summer stratification in the offshore waters of Lake Ontario; is a reduction in whiting events the cause?. J. Great Lakes Res., 32: 131–141.
Barica, J. and Allan, R. J. 1988. Utility of Soluble Reactive Phosphorus Measurements in Great Lakes Surveillance Programs: A Summary. J. Great Lakes Res., 14(3): 377–379.
Beeton, A. M. 1965. Eutrophication of the St. Lawrence Great Lakes. Limnol. Oceanogr., 10: 240–254.
Bennett, E. B. 1986. The nitrifying of Lake Superior. Ambio, 15(5): 272–275.
Carew, T. J. and Williams, D. J. 1975. Surveillance methodology - 1974. Inland Waters Directorate, Department of the Environment. Technical Bulletin No. 29
Chapra, S. C., Dove, A. and Rockwell, D. 2009. Great Lakes Chloride: Long-Term Mass Balance and Loading Analysis. J. Great Lakes Res., 35(2): 272–284.
Dobson, H. F. H. Principal Ions and Dissolved Oxygen in Lake Ontario. Proceedings Tenth Conference on Great Lakes Research. pp.337–356. International Association for Great Lakes Research.
Dobson, H. F. H., Gilbertson, M. and Sly, P. G. 1974. A summary and comparison of nutrients and related water quality in lakes Erie, Ontario, Huron and Superior. J. Fish. Res. Bd. Can., 31: 731–738.
Dobson, H. F. H. 1984. Lake Ontario Water Chemistry Atlas, Burlington, Ontario: Environment Canada, National Water Research Institute, Inland Waters Directorate, Canada Centre for Inland Waters. Scientific Series No. 139
Dobson, H. F. H. 1994. Lake Ontario Water Quality Trends, 1969–1992: Some Observational Nutrient-Science for Protecting a Major and Vulnerable Source of Drinking Water, Burlington, ON: Canada Centre for Inland Waters. National Water Research Institute Contribution No. 94–58
Dove, A., L'Italien, S. and Gilroy, D. 2009. Great Lakes Surveillance Program, Field Methods Manual, Burlington, Ontario: Ontario Water Quality Monitoring and Surveillance, Environment Canada. Report No. WQMS 09-001
El-Shaarawi, A. H. and Neilson, M. A. 1984. Changes in nutrient levels of lake water stored at 4°C. Can. J. Fish. Aquat. Sci., 41(6): 985–988.
Finlay, J. C., Sterner, R. W. and Kumar, S. 2007. Isotopic Evidence for In-Lake Production of Accumulating Nitrate in Lake Superior. Ecological Applications, 17(8): 2323–2332.
Griffiths, R. W., Schloesser, D. W., Leach, J. H. and Kovalak, W. P. 1991. Distribution and dispersal of the zebra mussel (Dreissena polymorpha) in the Great Lakes Region. Can. J. Fish. Aquat. Sci., 48: 1381–1388.
Hebert, C. E., Weseloh Chip, D. V., Idrissi, A., Arts, M. T., O'Gorman, R., Gorman, O. T., Locke, B., Madenjian, C. P. and Roseman, E. F. 2008. Restoring Piscivorous Fish Populations in the Laurentian Great Lakes Causes Seabird Dietary Change. Ecology, 89(4): 891–897.
Hecky, R. E., Smith, R. E. H., Barton, D. R., Guildford, S. J., Taylor, W. D., Charlton, M. N. and Howell, T. 2004. The nearshore phosphorus shunt: a consequence of ecosystem engineering by dreissenids in the Laurentian Great Lakes. Can. J. Fish. Aquat. Sci., 61: 1285–1293.
Hiriart-Baer, V. P., Campbell, L. M., Guildford, S. J., Hecky, R. E. R. E., Moore, L. and Charlton, M. N. Cladophora in Lake Ontario. Presented at 46th Annual Conference on Great Lakes Research. June 2003, Chicago, Illinois. Chicago, IL: International Association for Great Lakes Research.
Holeck, K. T., Watkins, J. M., Mills, E. L., Johannsson, O., Millard, S., Richardson, V. and Bowen, K. 2008. Spatial and long-term temporal assessment of Lake Ontario water clarity, nutrients, chlorophyll a, and zooplankton. Aquatic Ecosystem Health & Management, 11(4): 377–391.
Howell, T. 1998. Occurrence of the alga Cladophora along the north shore of eastern Lake Erie in 1995, Toronto, Ont.: Ontario Ministry of the Environment, Queen's Printers for Ontario. ISBN 0-7778-8172-1
International Lake Ontario – St. Lawrence River Water Pollution Board (ILOWPB). 1969. Pollution of lake Ontario and the International Section of the St. Lawrence River, Vol. 3., Windsor, Ontario: International Joint Commission.
Johannsson, O. E., Dermott, R., Graham, D. M., Dahl, J. A., Millard, E. S. E. S., Myles, D. D. and Leblanc, J. 2000. Benthic and pelagic secondary production in Lake Erie after the invasion of Dreissena spp. with implications for fish production. J. Great Lakes Res., 26: 31–54.
Kwiatkowsky, R. E. and Neilson, M. A. 1983. Lake Ontario surveillance data, 1968–1980 Environ. Can. Inland Waters Dir. Tech. Bull. No. 126
Lean, D. R. S. 1987. Overview of studies on the nutrient status of Lake Ontario. Can. J. Fish. Aquat. Sci. Vol, 44: 2042–2046.
L'Italien, S. and Fay, L. A. 1993. Great Lakes Surveillance Program - Field Methods Manual, Burlington, Ontario: Water Quality Branch, Inland Waters Directorate, Ontario Region. Report No. WQB/IWD-OR/93-01/I, 1993
Millard, E. S., Johannsson, O. E., Neilson, M. A. and El-Shaarawi, A. H. 2003. “Long-term, seasonal and spatial trends in nutrients, chlorophyll a and light attenuation in Lake Ontario”. In State of Lake Ontario (SOLO) – Past, Present and Future, Ecovision World Monograph Series Edited by: Munawar, M. 97–134. Burlington, ON: Aquatic Ecosystem Health and Management Society.
Mills, E. L., Dermott, R. M., Roseman, E. F., Dustin, D., Mellina, E., Conn, D. B. and Spidle, A. P. 1993. Colonization, ecology and population structure of the “quagga” mussel (Bivalvia: Dreissenidae) in the lower Great Lakes. Can J. Fish. Aquat. Sci., 50: 2305–2314.
Mills, E. L., Casselman, J. M., Dermott, R., Fitzsimons, J. D., Gal, G., Holeck, K. T., Hoyle, J. A., Johannsson, O. E., Lantry, B. F., Makarewicz, J. C., Millard, E. S., Munawar, I. F., Munawar, M., O'Gorman, R., Owens, R. W., Rudstam, L. G., Schaner, T. and Stewart, T. J. 2005. A synthesis of ecological and fish-community changes in Lake Ontario, 1970–2000 Great Lakes Fishery Commission Technical Report Series #67
Munawar, M., Munawar, I. F., Dermott, R., Fitzpatrick, M. and Niblock, H. 2006. The threat of exotic species to the food web in Lake Ontario. Verh. Internat. Verein. Limnol., 29: 1194–1198.
National Laboratory for Environmental Testing (NLET). 1997. Manual of Analytical Methods, Major Ions and Nutrients, Volume 1, Burlington, Ontario: Environment Canada.
Sandilands, R. G. and Mudroch, A. 1983. Nepheloid Layer in Lake Ontario. J. Great Lakes Res., 9(2): 190–200.
Schelske, C. L., Stoermer, E. G. and Fahnenstiel Haibach, G. L. M. 1986. Phosphorus enrichment, silica utilization, and biochemical silica depletion in the Great Lakes. Can. J. Fish. Aquat. Sci., 43: 407–415.
Schindler, D. W. 1977. Evolution of phosphorus limitation in lakes. Science, 195: 260–262.
Schroeder, R. 1969. Ein Summierender Wasserschöpfer. (An integrating water sampler. In German). Arch. Hydrobiol., 66: 241–243.
Shiomi, M. T. and Chawla, V. K. 1970. Nutrients in Lake Ontario. Proc. 13th Conf. Great Lakes Res., 1970: 715–732.
Smith, V. H. 1983. Low nitrogen to phosphorus ratios favor dominance by blue-green algae in lake phytoplankton. Science, 221: 669–671.
Stevens, R. J. J. and Neilson, M. A. 1987. Response of Lake Ontario to reductions in phosphorus load, 1967–82. Can. J. Fish. Aquat. Sci., Vol., 44: 2059–2068.
Vollenweider, R. A. and Kerekes, J. 1982. Eutrophication of Waters, Monitoring Assessment and Control, Paris: Organization for Economic Cooperation and Development (OECD).
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