Abstract
New methods of weather analysis accompanied by microhabitat ‘bioassays’ have been applied in several case studies to demonstrate effects of atmospheric processes on patterns of community composition and structure and potential species evolution. Average spatial and seasonal airmass dynamics which determine regional and elevational patterns of relative microhabitat favorability, were found to vary between a recent global warming trend (ca 1900 to 1940) and the subsequent global cooling trend (ca 1940 to 1970). These apparently systematic spatial and temporal shifts in weather were related to plant establishment patterns and community composition and structure. The proposed causal mechanisms function, in part, through regional shifts in microhabitat size. These effects are similar to larger scale, longer term shifts deduced from the late Quaternary fossil record. By modifying the spatial approach, month-to-month and year-to-year variability of weather has been examined for the last 130 years at individual points in southwestern North America. Three climatic regimes (the end of the Little Ice Age, the recent warming trend and the recent cooling trend) exhibited distinct year-to-year patterns of weather that can be related to the establishment of different kinds of plants (e.g., C4 grasses versus C3 shrubs). Oscillations between different temporal climatic regimes appear to promote the episodic establishment of different life forms, but not necessarily their local extinction. The two methods of weather analysis have been combined in a regional assessment of climatic controls of different biomes in space and time with a primary focus on the Chihuahuan desert. Natural ecotones between the Chihuahuan desert and neighboring biomes are clearly related to large scale airmass dynamics associated with seasonal oscillations in jetstream position. The weather patterns controlling ecotonal positions result from seasonal topographic influences on the general circulation of the atmosphere. The apparent stability of these patterns allows causal hypotheses of biogeographic dynamics and the evolution of physiological traits and life history characteristics.
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References
Axelrod, D. I., 1979. Age and origin of Sonoran Desert vegetation. Occasion. Pap. California Acad. Sci. 132: 1–74.
Brand, D. D., 1937. The natural landscape of northwestern Chihuahua. In: The University of New Mexico Bulletin Geological Series. University of New Mexico Press, Albuquerque.
Brown, J. H. & Gibson, A. C., 1983. Biogeography. Mosby, St. Louis.
Bryson, R. A. & Lowry, W. P., 1955. Synoptic climatology of the Arizona summer precipitation singularity. Bull. Amer. Meteorol. Soc. 36: 329–339.
Budyko, M. I., 1982. The Earth's Climate: Past and Future. In: W. L.Donn (ed.), International Geophysics Series. Academic Press, New York.
Cole, K. L., 1982. Late Quaternary zonation of vegetation in the eastern Grand Canyon. Science 217: 1142–1145.
Cottam, W. P., Tucker, J. M. & Drobnick, R., 1959. Some clues to Great Basin post-pluvial climates provided by oak distributions. Ecology 40: 361–377.
Hales, J. E., 1974. Southwestern United States summer monsoon source — Gulf of Mexico or Pacific Ocean? J. Appl. Meteorol. 13: 331–342.
Lanner, R. M., 1974. Natural hybridization between Pinus edulis and Pinus monophylla in the American Southwest. Silv. Gen. 23: 108–115.
LeSueur, H., 1945. The ecology of the vegetation of Chihuahua, Mexico, North of parallel twenty-eight. University of Texas, Austin, Texas.
Levins, R., 1968. Evolution in changing environments. In: R. H.MacArthur (ed.), Princeton Monographs in Population Biology. Princeton University Press, Princeton.
Mitchell, V. L., 1976. The regionalization of climate in the western United States. J. Appl. Meteorol. 15: 920–927.
Mooney, H. A. & Gulmon, S. L., 1982. Constraints on leaf structure and function in reference to herbivory. BioScience 32: 198–206.
Muller, C. H., 1937. Plants as indicators of climate in northeast Mexico. Amer. Midl. Natur. 18: 986–1000.
Muller, C. H., 1939. Relations of the vegetation and climatic types in Nuevo Leon, Mexico. Amer. Midl. Natur. 21: 687–729.
Muller, C. H., 1951. The significance of vegetative reproduction in Quercus. Madrono 11: 129–137.
Neilson, R. P., 1986. High resolution climatic analysis and southwest biogeography. Science 232: 27–34.
Neilson, R. P., 1987. On the interface between current ecological studies and the paleobotany of pinyon-juniper woodlands. In: Proceedings, Pinyon-Juniper Conference. Sponsored by the University of Nevada/Reno, the USDA Forest Service (RMS) and the Bureau of Land Management, January, 1986, Reno.
Neilson, R. P. & Wullstein, L. H., 1983. Biogeography of two southwest American oaks in relation to atmospheric dynamics. J. Biogeogr. 10: 275–297.
Neilson, R. P. & Wullstein, L. H., 1986a. Comparative drought physiology and biogeography of Quercus gambelii and Quercus turbinella. Amer. Midl. Natur. 114: 259–271.
Neilson, R. P. & Wullstein, L. H., 1986b. Microhabitat affinities of Gambel oak seedlings. Great Basin Natur. 46: 294–298.
NOAA, 1979. Climatological data: Annual summary. National Oceanic and Atmospheric Administration. National Climatic Center, Asheville.
Palmén, E. & Newton, C. W., 1969. Atmospheric circulation systems. In: J.VanMieghem & A. L.Hales (eds), International Geophysics Series. Academic Press, New York.
Roughgarden, J., Quinn, J. F., Dunham, A. E., Toft, C. A., Shea, P. J., Simberloff, D., Strong, D. R., Connell, J. H. & Salt, G. W., 1983. A round table on research in ecology and evolutionary biology. Amer. Natur. 122: 583–705.
Schmidt, R. H., 1979. A climatic delineation of the ‘real’ Chihuahuan Desert region. J. Arid Environ. 2: 243–250.
Schmidt, R. H., 1986. Chihuahuan Climate. In: J. C.Barlow, A. M.Powell & B. N.Timmermann (eds), Second Symposium on Resources of the Chihuahuan Desert Region, pp. 40–63. Chihuahuan Desert Research Institute, Alpine.
Shreve, F., 1942. Grassland and related vegetation in northern Mexico. Madrono 6: 190–198.
Stutz, H. C. & Thomas, L. K., 1964. Hybridization and introgression in Cowania and Purshia. Evolution 18: 183–195.
Thomas, H. E., 1962. The meteorologic phenomenon of drought in the southwest: drought in the southwest, 1942–1956. Geological Survey Professional Paper 372-A. U.S. Government Printing Office, Washington.
Thomas, H. E., 1963. General summary of effects of the drought in the southwest: drought in the southwest, 1942–1956. Geological Survey Professional Paper 372-H. U.S. Government Printing Office, Washington.
Tucker, J. M., 1952. Taxonomic interrelationships in the Quercus dumosa complex. Madrono 11: 234–251.
Tucker, J. M., 1961. Studies in the Quercus undulata complex I. A preliminary statement. Amer. J. Bot. 48: 202–208.
VanDevender, T. R., 1985. Climatic cadences and the composition of Chihuahuan desert communities: the late Pleistocene packrat midden record. In: J.Diamond & T. J.Case (eds), Community ecology, pp. 285–299. Harper & Row, Publishers, New York.
VanDevender, T. R., 1986. Pleistocene climates and endemism in the Chihuahuan desert flora. In: J. C.Barlow, A. M.Powell & B. N.Timmermann (eds), Second Symposium on Resources of the Chihuahuan Desert Region, pp 1–19. Chihuahuan Desert Research Institute, Alpine.
VanDevender, T. R., Betancourt, J. L. & Wimberley, M., 1984. Biogeographic implications of a packrat midden sequence from the Sacramento Mountains, south-central New Mexico. Quat. Res. 22: 344–360.
VanDevender, T. R. & Toolin, L. J., 1983. Late Quaternary vegetation of the San Andres Mountains, Sierra County, New Mexico. In: P. L.Eidenbach (ed.), The Prehistory of Rhodes Canyon Survey and Mitigation, pp. 33–54. Holloman Air Force Base, U.S.A.F., Tularosa.
Walter, H., 1979. Vegetation of the earth and ecological systems of the geo-biosphere. Springer-Verlag, New York.
Wendland, W. M. & Bryson, R. A., 1981. Northern hemisphere airstream regions. Mon. Weather Rev. 109: 255–270.
Whittaker, R. H., 1961. Vegetation history of the pacific coast States and the ‘central’ significance of the Klamath region. Madrono 16: 5–23.
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Nomenclature follows Kearney & Peebles (1960), Arizona flora, University of California Press, Berkeley.
I would like to thank Thomas R. Van Devender and Tony Burgess for many helpful discussions of Chihuahuan desert biogeography and I. Colin Prentice and the anonymous reviewers for helpful comments on the manuscript.
This research was supported in part by a grant from the National Science Foundation (BSR-8400797).
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Neilson, R.P. Biotic regionalization and climatic controls in western North America. Vegetatio 70, 135–147 (1987). https://doi.org/10.1007/BF00039327
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DOI: https://doi.org/10.1007/BF00039327