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Holocene Tree Line and Climate Change on the Queen Charlotte Islands, Canada

  • Marlow G. Pellatt (a1) and Rolf W. Mathewes (a1)
Abstract

Palynological study of two subalpine ponds on the Queen Charlotte Islands reveals changes in tree line and climate during the Holocene. The findings agree with previous reconstructions, from nearby Louise Pond on the Queen Charlotte Islands, that suggest a warmer-than-present climate and higher-than-present tree lines in the early Holocene (ca. 9600–6600 14C yr B.P.). Basal ages at SC1 Pond and Shangri-La Bog indicate that the basins did not hold permanent water before 7200 14C yr B.P., consistent with a warmer and drier early Holocene previously inferred from Louise Pond. Pollen and plant macrofossils indicate the initial establishment of subalpine conditions by 6090 ± 90 14C yr B.P., similar to the 5790 ± 130 14C yr B.P. age for cooling inferred from Louise Pond. Conditions similar to present were established at SC1 Pond by 3460 ± 100 14C yr B.P., confirming the previous estimate of 3400 14C yr B.P. at Louise Pond. This 3400 14C yr B.P. vegetation shift on the Queen Charlotte Islands corresponds with the beginning of the Tiedemann glacial advance in the south-coastal mountains of British Columbia (ca. 3300 14C yr B.P.), the Peyto and Robson glacial advances between 3300 and 2800 14C yr B.P. in the Rocky Mountains, and climatic cooling inferred from palynological studies throughout southern British Columbia, northern Washington, and southeast Alaska. These findings confirm that changes in regional climate influenced changes in vegetation in coastal British Columbia.

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Alley, N.F., (1976). The palynology and paleoclimatic significance of a dated core of Holocene peat, Okanagan Valley, southern British Columbia. Canadian Journal of Earth Sciences. 13, 11311144.
Arno, S., Hammerly, R., (1984). Timberlines: Mountain and Arctic Forest Frontiers. Douglas and McIntyre, Vancouver.
Banner, A., Pojar, J., Trowbridge, R., (1983). Ecosystem classification of the Coastal Western Hemlock Zone, Queen Charlotte Island Subzone (CWHg), Prince Rupert Forest Region, British Columbia. Ministry of Forests, Victoria.
Barnosky, C.W., Anderson, P.M., Bartlein, P.J., (1987). The northwestern U.S. during deglaciation: Vegetational history and paleoclimatic implications. North America and adjacent oceans during the last deglaciation. The Geology of North America K-3, Geological Society of America, Boulder, p. 289321.
Beaudoin, A.B., (1986). UsingPicea/Pinus . Geographie Physique et Quaternaire. 40, 145152.
Brooke, R.C., Peterson, E.B., Krajina, V.J., (1970). The Subalpine Mountain Hemlock Zone: Ecology of Western North America. University of British Columbia, Vancouver.
Calder, J., Taylor, R., (1968). Flora of the Queen Charlotte Islands. Part I. Systematics of the Vascular Plants. Canada Department of Agriculture Monograph Number 1, Part 1 Research Branch, Ottawa.
Clague, J.J., Mathewes, R.W., Buhay, W.M., Edwards, T.W.D., (1992). Early Holocene climate at Castle Peak, southern Coast Mountains, British Columbia, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology. 95, 153167.
Cwynar, L.C., (1993). The abundance of exotic western hemlock pollen at Waterdevil Lake, White Pass, northern British Columbia: A preliminary analysis. Review of Palaeobotany and Palynology. 79, 113119.
Dunwiddie, P., (1985). Dichotomous key to conifer foliage in the Pacific Northwest. Northwest Science. 59, 185191.
Dunwiddie, P., (1986). A 6000-year record of forest history on Mount Rainier, Washington. Ecology. 67, 5868.
Dunwiddie, P., (1987). Macrofossil and pollen representation of coniferous trees in modern sediments from Washington. Ecology. 68, 111.
Faegri, K., Iversen, J., (1989). Textbook of Pollen Analysis. Wiley, London.
Fedje, D. W., (1993). Sea-Levels and Prehistory in Gwaii Haanas. University of Calgary, Calgary, Alberta, Canada.
Grimm, E., (1987). CONISS: A FORTRAN 77 program for stratigraphically constrained cluster analysis by the method of incremental sum of squares. Computers & Geosciences. 13, 1335.
Grimm, E., (1991). TILIAGRAPH v1.25 (computer software). Illinois State Museum. Research and Collections Centre, Springfield, IL.
Grimm, E., (1993). TILIA v2.0 (computer software). Illinois State Museum. Research and Collections Centre, Springfield, IL.
Hansen, B.S., Easterbrook, D.J., (1974). Stratigraphy and palynology of late Quaternary sediments in the Puget Lowland, Washington. Geological Society of America Bulletin. 85, 587602.
Hansen, B.S., Engstrom, D.R., (1996). Vegetation history of Pleasant Island, southeastern Alaska, since 13,000 yr B.P. Quaternary Research. 46, 161175.
Hebda, R.J., (1983). Late-glacial and postglacial vegetation history at Bear Cove bog, northeast Vancouver Island, British Columbia. Canadian Journal of Earth Sciences. 61, 31723192.
Hebda, R.J., (1995). British Columbia vegetation and climate history with focus on 6 KA BP. Geographie Physique et Quaternaire. 49, 5579.
Hebda, R.J., Mathewes, R.W., (1984). Holocene history of cedar and native Indian cultures of the North American Pacific Coast. Science. 225, 711712.
Heusser, C.J., (1960). Late Pleistocene Environments of North Pacific North America. American Geographical Society, New York.
Heusser, C.J., (1969). Modern pollen spectra from the Olympic Peninsula, Washington. Bulletin of the Torrey Botanical Club. 96, 407417.
Heusser, C.J., (1973). Modern pollen spectra from Mount Rainier, Washington. Northwest Science. 47, 18.
Heusser, C.J., (1985). Quaternary pollen records from the Interior Pacific Northwest Coast: Aleutians to the Oregon–California boundary. Bryant, V.M., Holloway, R.G., Pollen Records of Late-Quaternary North American Sediments. American Association of Stratigraphic Palynologists Foundation, Dallas, 141166.
Heusser, C.J., Heusser, L.E., Peteet, D.M., (1985). Late-Quaternary climatic change on the North American North Pacific Coast. Nature. 315, 485487.
Kearney, M.S., Luckman, B.H., (1983). Holocene timberline fluctuations in Jasper National Park, Alberta. Science. 221, 261263.
Kimmins, J.P., (1987). Forest Ecology. Macmillan, New York.
Leopold, E.B., Nickmann, R., Hedges, J.I., Ertel, J.R., (1982). Pollen and lignin records of late Quaternary vegetation, Lake Washington. Science. 218, 13051307.
Luckman, B.H., Holdsworth, G., Osborn, G.D., (1993). Neoglacial glacier fluctuations in the Canadian Rockies. Quaternary Research. 39, 144153.
Luckman, B.H., Kearney, M.S., (1986). Reconstruction of Holocene changes in alpine vegetation and climate in the Maligne Range, Jasper National Park, Alberta. Quaternary Research. 26, 244261.
Mack, R.N., Rutter, N.W., Valastro, S., (1978). Late Quaternary pollen record from the Sanpoil River Valley, Washington. Canadian Journal of Botany. 56, 16421650.
Mack, R.N., Rutter, N.W., Valastro, S., (1979). Holocene vegetation history of the Okanogan Valley, Washington. Quaternary Research. 12, 212225.
Mann, D.H., Hamilton, T.D., (1995). Late Pleistocene and Holocene paleoenvironments of the North Pacific Coast. Quaternary Science Reviews. 14, 449471.
Mathewes, R.W., (1973). A palynological study of postglacial vegetation changes in the University Research Forest, southwestern British Columbia. Canadian Journal of Botany. 51, 20852103.
Mathewes, R.W., (1985). Paleobotanical evidence for climatic change in southern British Columbia during late-glacial and Holocene time. Syllogeus. 55, 397422.
Mathewes, R.W., (1989). The Queen Charlotte Islands refugium: A paleoecological perspective. Fulton, R.J., Quaternary Geology of Canada and Greenland. Geological Survey of Canada, 486491.
Mathewes, R.W., (1993). Evidence for Younger Dryas-age cooling on the north Pacific coast of America. Quaternary Science Reviews. 12, 321331.
Mathewes, R.W., Heusser, L.E., (1981). A 12,000 year palynological record of temperature and precipitation trends in southwestern British Columbia. Canadian Journal of Botany. 59, 707710.
Mathewes, R.W., King, M., (1989). Holocene vegetation, climate, and lake-level changes in the Interior Douglas-fir Biogeoclimatic Zone, British Columbia. Canadian Journal of Earth Sciences. 26, 18111825.
Mathewes, R.W., Rouse, G.E., (1975). Palynology and paleoecology of postglacial sediments from the lower Fraser River Canyon of British Columbia. Canadian Journal of Earth Sciences. 12, 745756.
McAndrews, J., Berti, A., Norris, G., (1973). Key to the Quaternary pollen and spores of the Great Lakes Region. Life Science Miscellaneous Publication Royal Ontario Museum, Toronto.
McLachlan, J.S., Brubaker, L.B., (1995). Local and regional vegetation change on the northeastern Olympic Peninsula during the Holocene. Canadian Journal of Botany. 73, 16181627.
Mehringer, P.J. Jr., (1985). Late Quaternary pollen records from the Interior Pacific Northwest and Northern Great Basin of the United States. Bryant, V.M., Holloway, R.G., Pollen Records of Late-Quaternary North American Sediments. American Association of Stratigraphic Palynologists Foundation, Dallas, 167190.
Moore, P.D., Webb, J.A., Collinson, M.E., (1991). Pollen Analysis. Blackwell, Cambridge.
Pellatt, M. G., (1996). Postglacial Changes in Vegetation and Climate Near Treeline in British Columbia. Simon Fraser University, Burnaby, British Columbia, Canada.
Pellatt, M.G., Mathewes, R.W., (1994). Paleoecology of postglacial tree line fluctuations on the Queen Charlotte Islands, Canada. Ecoscience. 1, 7181.
Pojar, J., MacKinnon, A., (1994). Plants of Coastal British Columbia Including Washington, Oregon and Alaska. Lone Pine Publishing, Vancouver.
Porter, S.C., Denton, G.H., (1967). Chronology of Neoglaciation in the North American Cordillera. American Journal of Science. 265, 177210.
Quickfall, G. S., (1987). Paludification and Climate on the Queen Charlotte Islands During the Past 8000 years. Simon Fraser University, Burnaby, British Columbia, Canada.
Reasoner, M., Hickman, M., (1989). Late Quaternary environmental change in the Lake O'Hara region, Yoho National Park, British Columbia. Palaeogeography, Palaeoclimatology, Palaeoecology. 72, 291316.
Ryder, J. M., (1989). Holocene glacier fluctuations (Canadian Cordillera), Quaternary Geology of Canada and Greenland. Fulton, R. J., 1,, 74, 76, Geological Survey of Canada.
Ryder, J.R., Thomson, B., (1986). Neoglaciation in the southern Coast Mountains of British Columbia: Chronology prior to the late-Neoglacial maximum. Canadian Journal of Earth Sciences. 23, 273287.
Tranquillini, W., (1979). Physiological Ecology of the Alpine Timberline: Tree Existence at High Altitudes with Special Reference to the European Alps. Springer-Verlag, New York.
Wainman, N., Mathewes, R.W., (1987). Forest history of the last 12,000 years based on plant macrofossil analysis of sediment from Marion Lake southwestern, British Columbia. Canadian Journal of Botany. 65, 21792187.
Warner, B. G., (1984). Late Quaternary Paleoecology of Eastern Graham Island, Queen Charlotte Islands, British Columbia. Simon Fraser University, Burnaby, British Columbia, Canada.
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Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
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