Lake Trout Ecosystems in a Changing Environment - Chapter 17 (end) doc

... undeveloped and completely forested headwater basin with an area of 10.5 km 2 ; it contains a chain of four lakes (five distinct lake basins) that ultimately drain into Lake Superior via the Batchawana ... terrestrial flora and fauna of Boreal Shield ecosystems have many well-known adaptations to disturbances such as fire, but the aquatic biota also exhibit many specialized adaptation...

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... 8,000 years ago. Lake Agassiz was impounded between the retreating ice margins and the Manitoba Escarpment — the present-day remnants including Lakes Manitoba, Winnipeg, Dauphin, and Winnipegosis. ... banksiana) and red pine (Pinus resinosa); poorly drained sites are characterized by black and white spruce, balsam fir, tamarack (Larix laracina), eastern red cedar (Juniperus virginiana),...

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... Superior basin, and finally eastward into Lake Barlow-Ojib - way (Mandrak and Crossman, 1992). Lake Barlow-Ojibway extended across northeastern Ontario and northwestern Quebec, and drained into the ... America, 18,000–5,000 years ago Geological Survey of Canada, Map 170 3A. Evans, D.O. and Olver, C.H., 1995, Introduction of lake trout (Salvelinus namaycush) to inland lakes of...

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... propose stocking all available hatchery-reared lake trout allocated to a lake in a given year into one selected locality that has an abundance of spawning habitat, leaving other areas of the lake unstocked. ... of lake trout has occurred in Lake Erie. This lake has the least lake trout habitat of any of the Great Lakes, and suitable waters are restricted to the eas...

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... spawning areas in the littoral zones of Lake aux Sables using a tarp (Benoît and Legault, 2002) led lake trout to abandon these areas and reproduce in the artificial deep-water spawning areas ... occurring after lake trout spawning. Draw- downs occurred before lake spawning on 39 lakes and during spawning on 14 lakes (some lakes had drawdowns occurring at more than one time)...

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... 1-m increase in transparency would result in an increase in Z 10 of ca. 1 m. Following a 2-m increase in transparency, optimal habitat volumes in the same lakes would be reduced by between 8 and ... temperature boundaries and thus define usable lake trout habitat, or any other class of habitat. A 0 © 2004 by CRC Press LLC chapter six Lake trout (Salvelinus namaycush...

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... maximum and (b) mean depths between 1892 lake trout lakes and 436 other non lake trout lakes with available data. Lake Trout lakes Non -Lake Trout Lakes Maximum Depth (m) 0-1 0 1 0-2 0 2 0-3 0 3 0-4 0 4 0-5 0 5 0-6 0 6 0-7 0 7 0-8 0 8 0-9 0 9 0-1 00 10 0-1 10 50 40 30 20 10 0 Percent ... of lake surface areas for 1916 Ontario lake trout lakes and 682...

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... Molot, L .A. , 2003, Predicting optimal habitat boundaries for lake trout (Salvelinus namaycush Walbaum) in Canadian Shield lakes, Canadian Journal of Fisheries and Aquatic Sciences (in press). Dillon, ... organisms, leading Gorham (1996) to declare that lakes are under a “three-pronged attack” (Figure 8.7). In summary, DOC can have many important effects on lake trout habita...

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... pollutants may be increasing Hg concentrations in lake trout in small Boreal lakes. Experimental lake acidification was observed to increase Hg in fish (Wiener et al., 1990) and Hg in fish in lakes ... (Perca flavescens), Water Pollution Research Journal of Canada 28: 217 236. Health and Welfare Canada, 1984, Methylmercury in Canada, Volume 2, Health and Welfare Canada, Ott...

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... 1982). Although Al is abundant in nature, it is relatively insoluble in the neutral pH range and thus unavailable biologically. Acid- neutralizing capacity largely controls pH and the bioavailability ... monomeric Al, in comparison to lakes with fish (Gallagher and Baker, 1990). Small, high-elevation lakes in the Adirondacks are more likely to be fishless than larger lakes at low elev...

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