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  1. Determination of plant growth rate and growth temperature range from measurement of physiological parameters

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    Author(s): R. S. Criddle; B. N. Smith; L. D. Hansen; J. N. Church
    Date: 2001
    Source: In: McArthur, E. Durant; Fairbanks, Daniel J., comps. Shrubland ecosystem genetics and biodiversity: proceedings; 2000 June 13-15; Provo, UT. Proc. RMRS-P-21. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 251-258.
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (198.96 KB)
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    Description

    Many factors influence species range and diversity, but temperature and temperature variability are always major global determinants, irrespective of local constraints. On a global scale, the ranges of many taxa have been observed to increase and their diversity decrease with increasing latitude. On a local scale, gradients in species distribution are observable with increasing altitude. These gradients in species distribution have not previously been linked to physiology. In this communication, the gradients are proposed to be a consequence of the physical laws governing energy transduction, acting through natural selection in response to environmental temperature variability. Measurements of rates of energy production and its use in anabolic metabolism as a function of temperature show that respiratory rates and efficiency of green plants are closely adapted to diurnal temperature changes and mean temperatures of the native environment. Optimization of energy production and use by respiratory metabolism along global gradients in temperature and temperature variability is a genome x environment interaction, thus is a fundamental cause of the latitudinal/altitudinal gradients of species range and diversity.

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    Citation

    Criddle, R. S.; Smith, B. N.; Hansen, L. D.; Church, J. N. 2001. Determination of plant growth rate and growth temperature range from measurement of physiological parameters. In: McArthur, E. Durant; Fairbanks, Daniel J., comps. Shrubland ecosystem genetics and biodiversity: proceedings; 2000 June 13-15; Provo, UT. Proc. RMRS-P-21. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 251-258.

    Keywords

    wildland shrubs, genetics, biodiversity, disturbance, ecophysiology, community ecology

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