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Root systems of chaparral shrubs

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Summary

Root systems of chaparral shrubs were excavated from a 70 m2 plot of a mixed chaparral stand located on a north-facing slope in San Diego County (32°54′ N; 900 m above sea level). The main shrub species present were Adenostoma fasciculatum, Arctostaphylos pungens, Ceanothus greggii, Erigonum fasciculatum, and Haplopappus pinifolius. Shrubs were wired into their positions, and the soil was washed out beneath them down to a depth of approximately 60 cm, where impenetrable granite impeded further washing and root growth was severely restricted. Spacing and interweaving of root systems were recorded by an in-scale drawing. The roots were harvested in accordance to their depths, separated into diameter size classes for each species, and their dry weights measured. Roots of shrubs were largely confined to the upper soil levels. The roots of Eriogonum fasciculatum were concentrated in the upper soil layer. Roots of Adenostoma fasciculatum tended to be more superficial than those from Ceanothus greggii. It is hypothesized that the shallow soil at the excavation site impeded a clear depth zonation of the different root systems. The average dry weight root:shoot ratio was 0.6, ranging for the individual shrubs from 0.8 to 0.4. The root area always exceeded the shoot area, with the corresponding ratios ranging from 6 for Arctostaphylos pungens to 40 for Haplopappus pinifolius. The fine root density of 64 g dry weight per m2 under the canopy was significantly higher than in the unshaded area. However, the corresponding value of 45 g dry weight per m2 for the open ground is still high enough to make the establishment of other shrubs difficult.

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References

  • Barbour, M.G.: Desert dogma reexamined: root:shoot productivity and plant spacing. Amer. Midl. Nat. 89, 41–57 (1973)

    Google Scholar 

  • Caldwell, M.M., and Camp, L.B.: Belowground productivity of two cool desert communities. Oecologia (Berl.) 17, 123–130 (1974)

    Google Scholar 

  • Caldwell, M.M., Fernandez, O.A.: Dynamics of Great Basin shrub root systems. In: Environmental physiology of desert organisms (N.F. Hadley, ed.), pp. 38–51. Halstead Press 1975

  • Fernandez, O.A., Caldwell, M.M.: Phenology and dynamics of root growth of three cool semi-desert shrubs under field conditions. J. Ecol. 63, 703–714 (1975)

    Google Scholar 

  • Giliberto, J., Mooney, H.A., Kummerow, J.: Shrub structure analysis. In: Chile-California Mediterranean Scrub Atlas, Part II (J. Kummerow, K. Fishbeck, eds.), pp. 144–147. Stroudsburg, Pennsylvania: Dowden, Hutchingson & Ross 1977

    Google Scholar 

  • Hanes, T.L.: Ecological studies on two closely related chaparral shrubs in Southern California. Ecol. Monographs 35, 213–235 (1965)

    Google Scholar 

  • Head, G.C.: Shedding of roots. In: Shedding of plant parts (T.T. Kozlowski, ed.), pp 237–293. New York-London: Academic Press 1973

    Google Scholar 

  • Hellmers, H., Horton, J.S., Juhren, G., O'Keefe, J.: Root systems of some chaparral plants in Southern California. Ecol. 36, 667–679 (1955)

    Google Scholar 

  • Lyford, W.H.: Rhizography of non-woody roots of trees in the forest floor. In: The development and function of roots (J.G. Torrey, ed.), pp 179–196. London-New York-San Francisco: Academic Press 1975

    Google Scholar 

  • McMinn, R.G.: Characteristics of Douglas-fir root systems. Canad. J. Bot. 41, 105–122 (1963)

    Google Scholar 

  • Meusel, H.: Bewurzelung und Wuchsform einiger Asteriseus-Arten. Flora (Jena) 150, 411–454 (1961)

    Google Scholar 

  • Miller, P.C., Mooney, H.A.: The origin and structure of American arid-zone ecosystems. The producers: Interactions between environment, form, and function. Intern. Congress of Ecology, The Hague, Netherlands (September, 1974)

  • Remezov, N.P.: Methods of study of the biological turnover of elements in the forest. Pochvovodenie No. 1, 71–79, 1959 (not seen in original, quoted after Head, 1973)

  • Rodin, L.E., Bazilevich, N.I.: Production and mineral cycling in terrestrial vegetation 288 pp. Edinburgh: Oliver & Boyd 1967

    Google Scholar 

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Kummerow, J., Krause, D. & Jow, W. Root systems of chaparral shrubs. Oecologia 29, 163–177 (1977). https://doi.org/10.1007/BF00345795

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