. The Canadian field-naturalist. 1978 Merriam: Sloughs and Aspen Parkland, Alberta 111 Cold Loke« ,:::;il0^0Mm^^^^M^,. 100 mi r- icine Hat 100 Km Figure 2. Distribution of 74 quarter sections studied in tlie field (circles and triangles) and those also studied from 1945-1949 airphotos (triangles only). Boundaries for three regional subsamples and approximate limits of Alberta parkland also are shown. image onto 1-mm graph paper. These base maps were used in the field to map vegetation and land use boundaries at 1 mm = m and to note changes since 1970. Figure 3 is an example of a completed
. The Canadian field-naturalist. 1978 Merriam: Sloughs and Aspen Parkland, Alberta 111 Cold Loke« ,:::;il0^0Mm^^^^M^,. 100 mi r- icine Hat 100 Km Figure 2. Distribution of 74 quarter sections studied in tlie field (circles and triangles) and those also studied from 1945-1949 airphotos (triangles only). Boundaries for three regional subsamples and approximate limits of Alberta parkland also are shown. image onto 1-mm graph paper. These base maps were used in the field to map vegetation and land use boundaries at 1 mm = m and to note changes since 1970. Figure 3 is an example of a completed field map. Vegetation Types Major vegetation types within 50 m of the edge of each slough were mapped to char- acterize the habitats bordering the sloughs. Woody vegetation bordering sloughs was usu- ally dominated by Trembling Aspen {Populus tremuloides). Populus balsamifera balsamifera and ssp. trichocarpa (Brayshaw 1965) are not separated from P. tremuloides. Findings of Maini (1960) and Horton and Maini (1964) suggested that growth, senescence, and rejuvenation of aspen groves are not usually strict functions of age or of diameter (evident also in definitions, below). A classification of stand maturity was devised to give useful inventories of existing habitat conditions in slough borders. Four aspen maturity classes were used: (1) PO IV, overmature stands with. 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 Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
Size: 1541px × 1622px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafieldnaturalistsclub, bookcentury1900, bookcolle
