Growth Curves for Calcium-tolerant Lichens in the Canadian Rocky Mountains

摘要: Lichen growth curves have been compiled from measurements of Xanthoria elegans (Link) Th. Fr. and Aspicilia candida (Anzi.) on tree-ring dated moraines historically structures in the vicinity Peter Lougheed Elk Lakes Provincial Parks, Alberta British Columbia. The newly calibrated curve for X. previously published estimate radial rates 0.5 mm yr-' first century. However, new data show that developed by Osborn Taylor (1975) underestimates overestimates substrate age beyond 150 yr. It should be replaced constructed curve. has lichenometric potential carbonate-rich front ranges Canadian Rockies. an ecesis approximately 90 yr, followed a maximum average 0.9 at least 60 is not known if species More are needed to better establish whether regional variations exist period.