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Water quality assessment of Lisgar Lake, Tillsonburg, Ontario

Show simple item record Gemza, Andy F.
dc.coverage.spatial Lisgar Lake
dc.coverage.spatial Tillsonburg
dc.coverage.spatial Ontario 2019-03-08T16:19:49Z 2019-03-08T16:19:49Z 1991 1991-12
dc.description.abstract Lisgar Lake is a 6.8 ha hardwater lake with a maximum depth of 6.8 m. Centrally located in the town of Tillsonburg, it provides important aesthetic and recreational benefits to the public in a region where lakes of recreational size are rare. This report summarizes the water quality of Lisgar Lake during the ice-free season of 1987. Eutrophic Lisgar Lake experienced peak phytoplankton densities in late summer. Chlorophyll a levels were correlated to algal biovolumes and reached concentrations as high as 62 ?g/L, with an annual mean of 19.6 ?g/L. As the season progressed, the algal assemblage became increasingly dominated by blue-green algae which comprised 60 % of the total algal biovolume by late August. Water clarity, as measured by Secchi disc, varied from 4.0 m in the spring to less than 1.0 m by late summer. Mean annual TN:TP ratios were 173:1, but fell to less than 5:1 during the blue-green bloom episodes.
dc.format pdf
dc.language.iso en
dc.publisher Ontario Ministry of the Environment
dc.rights Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
dc.subject water quality
dc.subject water clarity
dc.subject water temperature
dc.subject phosphorus
dc.subject nitrogen
dc.subject chlorophyll a
dc.subject phytoplankton
dc.subject zooplankton
dc.title Water quality assessment of Lisgar Lake, Tillsonburg, Ontario
dc.type Report
dc.rights.holder Queen's Printer for Ontario
dc.contributor.affiliation Water Resources Branch, Ontario Ministry of the Environment
dcterms.relation Gemza, A.F. 1991. Water quality assessment of Lisgar Lake, Tillsonburg, Ontario. Ontario Ministry of the Environment, Limnology Section, Aquatic Plant Unit. Pp 42.

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