. The Canadian field-naturalist. 214 The Canadian Field-Naturalist Vol. 83. Figure 2. View of the alluvial levee of the Saskatchewan River near Cumberland House, showing examples of the following communities: A — Picea glauca — hardwoods forest, B — Fopuhis balsa?nifera regeneration, C — Alniis — Salix shrub, and D — Car ex fen. The alluvial-lacustrine plain is flat and lies below the flood levels of the rivers which meander through it. The rivers are bordered by natural levees of alluvium which show little soil profile development, probably because of fluctuating water tables and periodic gle
. The Canadian field-naturalist. 214 The Canadian Field-Naturalist Vol. 83. Figure 2. View of the alluvial levee of the Saskatchewan River near Cumberland House, showing examples of the following communities: A — Picea glauca — hardwoods forest, B — Fopuhis balsa?nifera regeneration, C — Alniis — Salix shrub, and D — Car ex fen. The alluvial-lacustrine plain is flat and lies below the flood levels of the rivers which meander through it. The rivers are bordered by natural levees of alluvium which show little soil profile development, probably because of fluctuating water tables and periodic gleysolic conditions. The dominant soil profile on the levees is a weakly developed wooded calcareous type. In the best drained sites, limited podsolization has led to Dark Gray Wooded and Gray Wooded profiles (Ellis and Graveland, 1967), Shallow, eutrophic lakes and marshes are surrounded mostly by wide bands of floating sedge mats. Peat, varying in thickness from 1 to more than 12 feet ( cm — m), covers the remainder of the flood plain. Climate The area lies within the Humid Continental Cool Summer (Dfb) climatic region of the Koppen classification (Atlas of Canada, 1957). Mean annual precipitation at Cumberland House is inches (432 mm)—with 10-11 inches (254-279 mm) falling during the growing season — (Ellis and Grave- land, 1967) and inches (391 mm) at The Pas (Kendrew and Currie, 1955). Mean monthly January and July temperatures at The Pas are —9°F and 65°F (—°C and °C), respectively. The summer growing season is short, the mean duration of the frost-free period at The Pas is 102 days. 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
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