00000nam 2200000zi 4500 9.874019 CaOODSP 20241203113649 m o d f cr ||||||||||| 190531s1990 oncbd #ob f100 0 eng d CaOODSP eng rda CaOODSP eng fre n------ En13-5/90-13E-PDF Barica, J., author. Factors controlling the evolution of salinity, productivity and ecological stability of eutrophic lakes in central North America : (a summary) / J. Barica. Burlington, Ontario, Canada : National Water Research Institute, Lakes Research Branch, [1990] 1 online resource (14 unnumbered pages) : maps, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 90-13 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "This is an invited summary paper to be presented and published at the SIL Symposium on evolution of lakes to be held in Poznan, Poland in May 1990. It is based on Dr Barica’s past work on prairie lakes (Freshwater Institute, Winnipeg) conducted prior to his appointment to NWRI, Burlington. It analyzes controlling factors in formation of ionic composition and phytoplankton biomass of the prairie lakes (surface deposits and soils, erosion, topography, lake morphometry, groundwater composition, etc.) and concludes that it is the semi-arid climate and groundwater flow which explain the extreme variability in lakes salinity and production. However, the ecological instability of the lakes (algal collapses and resulting anoxia) is triggered by meteorological factors. The winter anoxia (winterkill) is the result of continental climate and governed by lake morphometry"--Management perspective. Includes management perspective in English and French. gccst Lakes gccst Environmental management gccst Climate Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. NWRI contribution ; 90-13. (CaOODSP)9.844121 PDF 1.32 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-13-eng.pdf