Journal or Publishing Institution: Canadian Journal of Forest Research
Study: http://www.nrcresearchpress.com/doi/abs/10.1139/x99-083
Author(s): Newmaster, S.G., Bell, F.W. and Vitt, D.H.
Article Type: Peer Reviewed Study
Record ID: 1725
Abstract: The effects of two silvicultural herbicides (Vision®, Release®) on bryophytes and lichens were studied in a harvested boreal mixedwood ecosystem. A completely randomized design with 115 plots of 1 m2 allowed direct comparison between herbicides and their effects on community dynamics. Regression models were used to analyze the relationship between herbicide application rates (0.71-6.72 kg active ingredient/ha) and changes in bryophyte and lichen abundance and species richness for 2 years following herbicide application. Results showed that bryophyte and lichen abundance and species richness decreased after herbicide treatments. In general, herbicide applications reduced the diversity of forest mesophytes and weedy colonizers to an ecosystem with only a few species of colonizers. A combination of clustering techniques and ANOVA were used to divide bryophytes and lichens into three ecologically defined response groups: herbicide-tolerant colonizers, semi tolerant long-term stayers from dry open forest, and sensitive forest mesophytes.
Keywords: Boreal Forests, Forest Ecology, Mixed Forests, Glyphosate, Triclopyr, Lichens, Species Diversity, Weeds, Bryopsida, Application Rate, Frequency, Ontario; Tolerance, Species Diversity, Colonization
Citation: Newmaster, S.G., Bell, F.W. and Vitt, D.H., 1999. The effects of glyphosate and triclopyr on common bryophytes and lichens in northwestern Ontario. Canadian Journal of Forest Research, 29(7), pp.1101-1111.