. The Acidification of Ontario lakes : an assessment of their sensitivity and current status with respect to biological damage. Acid pollution of rivers, lakes, etc; Acid rain. Figure : Percent of lakes sampled in different parts of Ontario. Data are grouped by tertiary watershed. Sample Date The lakes in this data base were sampled between 1976 and 1989 with the most lakes sampled in 1980 and 1981. The number of lakes sampled in each year is shown in Fig. February is the month with the most lakes sampled; a histogram with the month of sampling is shown in Figure The influen
. The Acidification of Ontario lakes : an assessment of their sensitivity and current status with respect to biological damage. Acid pollution of rivers, lakes, etc; Acid rain. Figure : Percent of lakes sampled in different parts of Ontario. Data are grouped by tertiary watershed. Sample Date The lakes in this data base were sampled between 1976 and 1989 with the most lakes sampled in 1980 and 1981. The number of lakes sampled in each year is shown in Fig. February is the month with the most lakes sampled; a histogram with the month of sampling is shown in Figure The influence of sample collection time can be quite marked in smaller lakes, particularly for pH and alkalinity (Jeffries et al, 1979, Stoddard, 1987). Because only a very small number of lakes were sampled more than once, this effect is not considered here. 15. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Neary, B. P; Ontario. Ministry of the Environment. [Toronto] : Environment Ontario
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