Abstract
Latitudinal gradients of tree species composition along the Sierran/Cascade axis in northern California were explored by comparing forests of Lassen Volcanic and Yosemite National Parks, USA. A calibration procedure based on canonical correspondence analysis predicted a mean rate of elevational displacement of 172.1 m/° latitude for Lassen sites in Yosemite. This is a steep latitudinal gradient compared with other temperate uplands (which average around 100 m/0 latitude), but it corresponds with the magnitude of the July mean temperature gradient (143 m/0 latitude) and the annual precipitation gradient (230 m/0 latitude). Elevational displacement of basal-area weighted species means showed considerable variation. The range for montane species was 20–153 m/0 latitude; for subalpine species the range was 142–305 m/0 latitude. This disparity is related to differential temperature lapse rates between regions and is reinforced by contrasting biogeographic affinities of montane vs. subalpine species. Whereas it is uniformly hot and dry during the growing season at lower elevations in both regions, growing seasons in the subalpine zone are significantly warmer and drier (at comparable elevations) in Yosemite, the more southerly locale. Furthermore, montane species are principally of Sierran affinity, whereas subalpine are primarily of Pacific Northwestern affinity.
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References
Allen, R. B., Peet, R. K. & Baker, W. L. 1991. Gradient analysis of latitudinal variation in Southern Rocky Mountain forests. J. Biogeogr. 18: 123–139.
Arkley, R. J. 1981. Soil moisture use by mixed conifer forest in a summer-dry climate. Soil Sci. Soc. Am. J. 45: 423–427.
Barbour, M. G. 1988. California upland forests and woodlands. In: Barbour, M. G. & Billings, W. D. (eds), North American terrestrial vegetation, pp. 131–164. Cambridge University Press. Cambridge.
Barbour, M. G., Berg, N. H., Kittel, T. G. F. & Kunz, M. E. 1991. Snowpack and the distribution of a major vegetation ecotone in the Sierra Nevada of California. J. Biogeogr. 18: 141–149.
Berry, B. J. L. & Baker, A. M. 1968. Geographic sampling. In: Berry, B. J. L. & Marbbe, D. F. (eds), Spatial analysis: a reader in statistical geography, pp. 91–100. Prentice-Hall. Englewood Cliffs, New Jersey.
Bryson, R. A. & Lowry, W. P. 1955. Synoptic climatology of the Arizona summer precipitation singularity. Bull. Am. Meteorol. Soc. 36: 329–339.
Burns, R. M. & Honkala, B. H. 1990. Silvics of North America. Volume. 1, Conifers. Agricultural Handbook 654. USDA, Forest Service, Washington, DC.
Cogbill, C. V. & White, P. S. 1991. The latitude-elevation relationship for spruce-fir forests and treeline along the Appalachian mountain chain. Vegetatio 94: 153–175.
Daubenmire, R. 1954. Alpine timberlines in the Americas and their interpretation. Butler Univ. Bot. Stud. 11: 119–136.
Frank, E. C. & Lee, R. 1966. Potential solar beam irradiation on slopes: tables for 30° to 50° latitude. USDA Forest Servide, Rocky Mt. Forest Range Exp. Stat. Res. Pap. RM-18.
Harman, J. R. 1992. Synoptic climatology of the westerlies: process and pattern. Association of American Geographers. Washington, DC.
Hickman, J. C. (ed) 1993. The Jepson manual: Higher plants of California. Univ. of Calif. Press. Berkeley.
Li, W. & Chou, P. 1984. The geographical distribution of the spruce-fir forest in China and its modeling. Mt. Res. and Devel. 4: 203–212.
Major, J. 1977. California climate in relation to vegetation. In: Barbour, M. G. & Major, J. (eds), Terrestrial vegetation of California, pp. 11–74. Wiley. New York.
Neilson, R. P. & Wullstein, L. H. 1983. Biogeography of two southwest American oaks in relation to atmospheric dynamics. J. Biogeogr. 10: 275–297.
N.O.A.A. 1983. Climate normals for the U.S. (Base: 1951–80). National Climatic Center, Env. Data and Info. Serv., Nat. Ocean. Atmos. Admin., Gale Research Company. Detroit, Michigan.
Parker, A. J. 1982. Environmental and compositional ordinations of conifer forests in Yosemite National Park, California. Madrono 29: 109–118.
Parker, A. J. 1984. Mixed forests of red fir and white fir in Yosemite National Park, California. Am. Mid. Nat. 112: 15–23.
Parker, A. J. 1989. Forest/environment relationships in Yosemite National Park, California. Vegetatio 82: 41–54.
Parker, A. J. 1991. Forest/environment relationships in Lassen Volcanic National Park, California, USA. J. Biogeogr. 18: 543–552.
Peet, R. K. 1981. Forest vegetation of the Colorado Front Range. Vegetatio 45: 3–75.
ter Braak, C. J. F. 1987. The analysis of vegetation-environment relationships by canonical correspondence analysis. Vegetatio 69: 69–77.
ter Braak, C. J. F. 1988. CANOCO-a FORTRAN program for canonical community ordination by [partial] [detrended] [canonical] correspondence analysis, principal components analysis, and redundancy analysis (Version 2.1). Agricultural Mathematics Group. Wageningen.
Wentworth, T. R. 1981. Vegetation on limestone and granite in the Mule Mountains, Arizona. Ecology 62: 469–482.
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Parker, A.J. Latitudinal gradients of coniferous tree species, vegetation, and climate in the Sierran-Cascade axis of Northern California. Vegetatio 115, 145–155 (1994). https://doi.org/10.1007/BF00044869
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DOI: https://doi.org/10.1007/BF00044869