References Cited
- Aphalo, P. J. and Ballaré C. L., 1995: On the importance of information-aquiring systems in plant-plant interactions. Functional Ecology, 9: 5–14
- Baldocchi, D., Hutchison, B., Matt, D., and McMillen, R., 1986: Seasonal variation in statistics of photosynthetically active radiation penetration in an oak-hickory forest. Agricultural and Forest Meteorology, 36: 343–361.
- Ertl, L., 1951: Über die Lichtverhältnisse in Laubflechten. Planta, 39: 245–270.
- Federer, C. A. and Tanner, C. B., 1966: Spectral distribution of light in the forest. Ecology, 47: 640–643.
- Floyd, B. W., Burley, J. W. and Noble, R. D., 1978: Foliar developmental effects on forest floor light quality. Forest Science, 24: 445–451.
- Gates, D. M., Keegan, H. J., Schleter, J. C., and Weidner, V. R., 1965: Spectral properties of plants. Applied Optics, 4: 11–20.
- Gauslaa, Y., 1984: Heat resistance and energy budget in different Scandinavian plants. Holarctic Ecology, 7: 1–78.
- Hoffman, G. J., 1970: Spectral properties of selected plant species and some variation accompanying leaf thickness, pigmentation and dehydration. Proceedings South Dakota Academy of Sciences, 49: 60–72.
- Jacquemoud, S. and Baret, F., 1990: PROSPECT: A model of leaf optical properties spectra. Remote Sensing the Environment, 34: 75–91.
- Kondratyev, K. Ya, 1969: Radiation in the Atmosphere. International Geophysics series, vol 12. New York: Academic Press. 912 pp.
- Kullman, L., 1988: Holocene history of the forest-alpine tundra ecotone in the Scandes Mountains (central Sweden). New Phytologist, 108: 101–110.
- Larcher, W., 1975: Physiological Plant Ecology. New York: Springer-Verlag. 252 pp. LI-1800 Portable Spectroradiometer Instruction Manual, 1989: Publication. No. 8210-0030. LI-COR, inc., 4421 Superior street, P.O. Box 4425, Lincoln, Nebraska 68504-0425, USA.
- Messier, C. and Bellefleur, P., 1988: Light quantity and quality on the forest floor of pioneer and climax stages in a birch-beech-sugar maple stand. Canadian Journal of Forest Research, 18: 615–622.
- Ovhed, M., 1994: Experimental studies of the shortwave radiation in a mountain birch forest. Thesis for the degree of Filosofie Licentiate. Department of Meteorology, Box 516, S-751 20 Uppsala, Sweden.
- Ross, J., 1975: Radiation transfer in plant communities. In Monteith J. L. (ed.), Vegetation and the Atmosphere. Volume 1: Principles. London: Academic Press, 13–55.
- Skree, O., 1979: The regional distribution of vascular plants in Scandinavia with requirements for high summer temperatures. Norwegian Journal of Botany, 26: 295–318.
- Smith, H., 1986: The perception of light quality. In Kendrick, R. E. and Kronenberg, G. H. M. (eds.), Photomorphogenesis in Plants. Dodrecht: Martinus Nijhoff/Dr W. Junk Publishers, 187–217.
- Smith, H and Morgan, D. C., 1981: The spectral characteristics of visible radiation incident upon the surface of the Earth. In Smith, H. (ed.) Plants and the Daylight Spectrum. London: Academic Press, 2–20.
- Steven, M. D. and Unsworth, M. H., 1979: The diffuse solar irradiance of slopes under cloudless skies. Quarterly Journal of the Royal Meteorological Society, 105(445): 593–602.
- Stoutjesdijk, Ph. and Barkman, J. J., 1992: Microclimate, Vegetation and Fauna. Uppsala, Sweden: Opulus Press. 219 pp.
- WCPR, 1986: Revised instruction manual on radiation instruments and measurements. Frölich, C. and London, J. (eds.), World Climate Research Programme; publications series No. 7. WMO/TD —No 149.
- Woolley, J. T., 1971: Reflectance and transmittance of light by leaves. Plant Physiology, 47: 656–662.