Limiting Factors in Relation to Specific Ranges of Tolerance of Forest Trees

Abstract

The conclusions recorded in this paper are drawn from a study of the forests throughout the Province of Ontario, particularly along the shores of Lake Ontario, Lake Simcoe, the Kawartha Lakes, and Rideau Lakes; in Algonquin Park and in Mattagami and Timagami Forest Reserves. Observations, with notes, have been made during more than 6ooo miles of travel by canoe and over- land through the forest country of northern Ontario, especially along the streams and lakes forming the headwaters of the Muskoka, Maganatawan, Petewawa, and Madawaska rivers; also of the Montreal, Sturgeon, Wanapitei, Vermilion, Mlattagami, and Abitibi rivers. While the greater part of the discussion has particular reference to Ontario, the conclusions are made in the light of some personal knowledge of the forests southward to the Gulf of Mexico and westward to the Pacific.