. The Canadian field-naturalist. 1992 Freedman, Maass, and Parfenov: Thread-Leaved Sundew 535. Figure 1. The Thread-leaved Sundew, Drosera fiUformis The fruiting scape is about 13 cm long. Photographed at Swaine's Road Bog, Nova Scotia in the late summer, near the end of the growing season. disappearing over extensive areas, and plant species becoming endangered or regionally extinct (Larsen 1982; Johnson 1985). In the present report, we describe the results of an assessment undertaken on behalf of the Nova Scotia Department of the Environment (NSDOE) to address the potential effects on
. The Canadian field-naturalist. 1992 Freedman, Maass, and Parfenov: Thread-Leaved Sundew 535. Figure 1. The Thread-leaved Sundew, Drosera fiUformis The fruiting scape is about 13 cm long. Photographed at Swaine's Road Bog, Nova Scotia in the late summer, near the end of the growing season. disappearing over extensive areas, and plant species becoming endangered or regionally extinct (Larsen 1982; Johnson 1985). In the present report, we describe the results of an assessment undertaken on behalf of the Nova Scotia Department of the Environment (NSDOE) to address the potential effects on D. fiUformis and its habitat of the commercial extraction of peat from a wetland known as Swaine's Road Bog. We studied aspects of the autecology, community ecology, and habitat of D. fiUformis at its known sites in Nova Scotia, and then evaluated the risks potentially posed by peat mining by consideration of: (1) the direct risks of the proposed peat extraction to D. fiUformis in Swaine's Road Bog; (2) the indirect risks of peat extraction to D. fiUformis in habitat contiguous with the proposed mine area; and (3) the wider distribution of D. fiU- formis in southwestern Nova Scotia. Methods A total of 16 bogs was investigated in southwest- ern Nova Scotia during fieldwork in August and September, 1991. At sites with a population of iformis, visual estimates were made of percent cover of all species of bryophytes, lichens, and vascular plants occurring in ten, widely spaced, Im x Im quadrats. Quadrat placement was stratified by a requirement for inclusion of individuals of D. fiU- formis, with a view to describing the community of that species within the context of its immediately associated vegetation. A random placement of quadrats within the bogs was precluded by the rela- tively restricted distribution and small cover of D. fiUformis at all sites, and by the immediate needs of our research in terms of impact assessment. From the field data, calculations were made of
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Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1910, bookyear1919
