Perspectives in Southern Hemisphere Limnology: Proceedings by B. R. Davies, R. D. Walmsley (auth.), B. R. Davies, R. D.

By B. R. Davies, R. D. Walmsley (auth.), B. R. Davies, R. D. Walmsley (eds.)

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Extra info for Perspectives in Southern Hemisphere Limnology: Proceedings of a Symposium, held in Wilderness, South Africa, July 3–13, 1984

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Schematic showing all known mixing mechanisms operating in a lake exposed to a sudden wind stress. 25 Diurnal Mixed Layer Horizontal Mixing ! ~-------------------104m ------------------~. Horizontal Scale Fig. 16. Estimates (seconds) of mixing times in a typical lake. this review have been schematically detailed. ticular situations would warrant careful examination as to the predominance of the various mechanisms. It is most likely that for any particular situation only a small number of mechanisms indicated in Fig.

E. M. Archibald, National Institute for Water Research, Pretoria, unpubl. data; P. S. Visser, Research Institute for Diseases in a Tropical Environment, Durban, unpubl. data). , in press). Walker & Lawson (1977) specifically address the influence of altitude on stream temperature in a catchment in Victoria, and Morrissy (197 I) provides an interesting account of small-scale spatial variations of temperature in trout streams in South Australia. In an unpublished manuscript, Knott et al. (1976) review data on the temperatures of some Tasmanian waters.

Formation during site-specific studies of an ecological nature. In Europe, North America, and Japan the thermal characteristics of lotic habitats have been reasonably well documented (references in Smith 1972; Hynes, 1970a; Ward & Stanford, 1982a). Only fragmentary thermal data are available for hirge areas of the Southern Hemisphere, however. This is particularly true in South America, for which the only published work known to the author that focuses on thermal conditions in running waters (Geijskes, 1942) deals with a tropical river of the Northern Hemisphere.

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