. Contributions from the Osborn Botanical Laboratory. Plants. Vegetation of Northern Cape Breton. 345 or have been ravaged by repeated fires, white spruce, with local exceptions, is everywhere the most abundant tree of second growth forests. The explanation of this fact is obvious. The white spruce is essentially a pioneer. It seeds prolifically and rapidly colonizes open grounds of almost any description (Fig. 39). The effect of cultivation and fire in destroying the seedlings of balsam fir and other trees, which otherwise might have dominated, enables the spruce, with its capacity for rapid
. Contributions from the Osborn Botanical Laboratory. Plants. Vegetation of Northern Cape Breton. 345 or have been ravaged by repeated fires, white spruce, with local exceptions, is everywhere the most abundant tree of second growth forests. The explanation of this fact is obvious. The white spruce is essentially a pioneer. It seeds prolifically and rapidly colonizes open grounds of almost any description (Fig. 39). The effect of cultivation and fire in destroying the seedlings of balsam fir and other trees, which otherwise might have dominated, enables the spruce, with its capacity for rapid reproduction in the open, to establish itself and to make head-. FiGURE 40.—Blueberry barren near Frizzleton. way which otherwise would be impossible. The common practice of burning over woodlots in order to keep them open for pasturage or for some other reason, naturally favors the spruce. In brief, the combined effect of cultivation and fire is to arrest the succession, so that it rarely progresses beyond the pioneer forest stage. Blueberry barrens.—Among the most unique features of the interior plateau of northern Cape Breton are the Barrens. These natural barrens, which will be described later, should not be confused with the barrens of the lowlands (Fig. 40), which are the result of repeated fires, usually set intentionally every few years in the interest of the blueberry crop. Extensive blue-. 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 Osborn Botanical Laboratory. [New Haven?] Osborn Botanical Laboratory, Yale University
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