00000nam 2200000za 4500 9.866899 CaOODSP 20241203113644 cr ||||||||||| 190110s1986 oncd ot f000 0 eng d CaOODSP eng eng fre n-cn-on En13-5/86-71E-PDF Sedimentary diatom analyses from the Turkey Lakes watershed, Ontario [electronic resource] / by L.D. Delorme ... [et al.]. [Burlington, Ont. : National Water Research Institute, 1986] 73, [87] p. : charts, figs. NWRI contribution ; no. 86-71 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references: p. 69-72. "Four lakes north of Sault Ste. Marie, collectively known as the Turkey Lakes, show little impact by atmospheric loading. This assessment has been arrived at by using fossil algae, diatoms, to infer past acidity or pH trends. These lakes have been considered to be in the early stages of acidification. The fossil diatoms from the headwater lake, Batchawana Lake, may show an increase in the acidity near the surface of sediments implying an increase in acidity in recent times. The fossil diatoms from the lower lakes indicate the lake waters have been adequately buffered in the recent past. This low level buffering capacity has been sufficient to counteract acidified atmospheric loading"--Management Perspective. Text in English, prefatory material in English and French. gccst Water management gccst Water quality Delorme, L. D. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-71. (CaOODSP)9.844121 PDF 14.29 MB https://publications.gc.ca/collections/collection_2019/eccc/En13-5-86-71-eng.pdf