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Dynamics of cohorts of cladodes and related effects on reproduction in the shrub Retama sphaerocarpa in semi-arid south-eastern Spain

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Abstract

Changes in the size and age structure of the canopy of the leguminous shrub Retama sphaerocarpa in semi-arid south-eastern Spain were investigated by monitoring growth and survivorship of cladodes (photosynthetic stems) on marked shoots over a period of 26 months. Three basic morphological types of cladodes – long shoots, short shoots, and secondary short shoots – were distinguished.

The canopy of the shrubs contained three annual cohorts of cladodes in spring and summer. The number and size of shoots produced each year was highly variable and was apparently related to the amount of rainfall during the preceding cool season. The spring cohort of 1994 produced only 37% of cladodes compared with 1993. Two cohorts of shoots were actually initiated in spring and late summer of each year, but the second cohort produced only 2–12% of the number of cladodes compared with the spring cohort. The proportions of the different cohorts in the canopy changed rapidly from April to August, but only slowly during the remainder of the year when only two annual cohorts remained after extensive litterfall in late summer. This late summer litterfall caused a substantial reduction in green canopy area (40–50%) which was achieved mainly be shedding of one year old cladodes. The life expectancy of cladodes decreased with increasing order of their morphological type from 850 ± 25 days in long shoots to 563 ± 4 days and 546 ± 9 days in short shoots and second order short shoots, respectively.

Flowering and fruiting took place from May to July, almost exclusively on one year old cladodes, and coincided with the maximum development of the canopy. Flowering intensity was high in 1994, when individual shoots supported a mean number of approximately 150 flowers. Shoots produced an average of 12.6 ± 0.6 and 5.3 ± 1.0 fruits per shoot in 1993 and 1994, respectively. Most of the annual fruit crop (80–90%) was shed during litterfall in late summer. A proportion of 10–20% was retained in the canopy for up to 12 months, however, with some fruits persisting for more than 22 months.

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References

  • Adams, M. S. & Strain, B. R. 1968. Photosynthesis in stems and leaves of Cercidium floridum in relation to temperature. Oecol. Plant. 3: 285–297.

    Google Scholar 

  • Adams, M. S. & Strain, B. R. 1969. Seasonal photosynthetic rates in stems of Cercidium floridum Benth. Photosynthetica 3: 55–62.

    Google Scholar 

  • Bossard, C. C. & Rejmanek, M. 1992. Why have green stems? Funct. Ecol. 6: 197–205.

    Google Scholar 

  • Cerván, M. & Pardo, F. 1997. Dispersión de semillas de retama (Retama sphaerocarpa (L.) Boiss.) por el conejo (Oryctolagus cuniculus L.) en el centro de España. Donaña, Acta Vertebrata 24: 143–154.

    Google Scholar 

  • Comstock, J. P. & Ehleringer, J. R. 1988. Contrasting photosynthetic behavior in leaves and twigs of Hymenoclea salsola, a greentwigged warm desert shrub. Amer. J. Bot. 75: 1360–1370.

    Google Scholar 

  • Comstock, J. P., Cooper, T. A. & Ehleringer, J. R. 1988. Seasonal patterns of canopy development and carbon gain in nineteen warm desert shrub species. Oecologia 75: 327–335.

    Google Scholar 

  • De Lillis, M. & Fontanella, A. 1992. Comparative phenology and growth in different species of the Mediterranean maquis of central Italy. Vegetatio 99–100: 83–96.

    Google Scholar 

  • Freitag, H. 1971. Die natürliche Vegetation des südostspanischen Trockengebietes. Botan. Jahrb. 91: 11–310.

    Google Scholar 

  • Ginocchio, R. & Montenegro, G. 1992. Interpretation of metameric architecture in dominant shrubs of the Chilean matorral. Oecologia 90: 451–456.

    Google Scholar 

  • Gómez, J. M., Zamora, R., Hódar, J. A. & García, D. 1996. Experimental study of pollination by ants in Mediterranean high mountain and arid habitats. Oecologia 105: 236–242.

    Google Scholar 

  • Gómez Sal, A., Rey Benayas, J. M., López-Pintor, A. & Rebollo, S. 1999. Role of disturbance in maintaining a savanna-like pattern in Mediterranean Retama sphaerocarpa shrubland. J. Veg. Sci. 10: 365–370.

    Google Scholar 

  • Haase, P., Pugnaire, F. I., Fernández, E. M., Puigdefábregas, J., Clark, S. C. & Incoll, L. D. 1996a. An investigation of rooting depth of the semiarid shrub Retama sphaerocarpa (L.) Boiss. by labelling of ground water with a chemical tracer. J. Hydrol. 177: 23–31.

    Google Scholar 

  • Haase, P., Pugnaire, F. I., Clark, S. C. & Incoll, L.D. 1996b. Spatial patterns in a two-tiered semi-arid shrubland in south-eastern Spain. J. Veg. Sci. 7: 527–534.

    Google Scholar 

  • Haase, P., Pugnaire, F. I., Clark, S. C. & Incoll, L. D. 1999a. Diurnal and seasonal changes in cladode photosynthetic rate in relation to canopy age structure in the leguminous shrub Retama sphaerocarpa. Funct. Ecol. 13: 640–649.

    Google Scholar 

  • Haase, P., Pugnaire, F. I., Clark, S. C. & Incoll, L. D. 1999b. Environmental control of canopy dynamics and photosynthetic rate in the evergreen tussock grass Stipa tenacissima. Plant Ecol. 145: 323–335.

    Google Scholar 

  • Jackson, D. I. & Sweet, G. B. 1972. Flower initiation in temperate woody plants. Hort. Abstracts 42: 9–24.

    Google Scholar 

  • Lansac, A. R., Zaballos, J. P. & Martin, A. 1994. Seasonal water potential changes and proline accumulation in mediterranean shrubland species. Vegetatio 113: 141–154.

    Google Scholar 

  • Lázaro, R. & Rey, J. M. 1991. Sobre el clima de la provincia de Almería (S.E. Iberico): Primer ensayo de cartografía automatica de medias anuales de temperatura y precipitacion. Suelo y Planta 1: 61–68.

    Google Scholar 

  • Le Houérou, H. N. 1984. Rain use efficiency: a unifying concept in arid-land ecology. J. Arid Environ. 7: 213–247.

    Google Scholar 

  • Le Houérou, H. N. 1990. Global change: population, land-use and vegetation in the Mediterranean Basin by the mid-21st century. Pp. 301–367. In: Paepe, R., Fairbridge, R. W. & Jelgersma, S. (eds), Greenhouse Effect, Sea Level and Drought. Kluwer Academic Publishers, Amsterdam.

    Google Scholar 

  • Martín Cordero, C., Gil, A. M. & Ayuso, M. J. 1993. Transfer of bipiperidyl and quinolizidine alkaloids to Viscum cruciatum Sieber (Loranthaceae) hemiparasitic on Retama sphaerocarpa Boissier (Leguminosae). J. Chem. Ecol. 19: 2389–2393.

    Google Scholar 

  • Mooney, H. A. 1977. Southern coastal scrub. Pp. 472–482. In: Barbour, M. & Major, J. (eds), Terrestrial vegetation of California. Wiley, New York.

    Google Scholar 

  • Mooney, H. A. 1981. Primary production in mediterranean-climate regions. Pp. 249–255. In: di Castri, F., Goodall, D. W. & Specht, R. L. (eds), Mediterranean-type shrublands. Elsevier, New York.

    Google Scholar 

  • Mooney, H. A., Parsons, D. J. & Kummerow, J. 1974. Plant development in mediterranean climates. Pp. 255–268. In: Lieth, H. (ed), Phenology and seasonality modeling. Springer-Verlag, New York.

    Google Scholar 

  • Mooney, H. A., Kummerow, J., Johnson, A.W., Parsons, D. J., Keeley, S., Hoffmann, A., Hays, R. I., Giliberto, J. & Chu, C. 1977. The producers, their resources and adaptive responses. Pp. 85–143. In: Mooney, H. A. (ed), Convergent evolution in Chile and California. Dowden, Hutchinson and Ross Inc., Stroudsburg, Penn.

    Google Scholar 

  • Mooney, H. A. & Kummerow, J. 1981. Phenological development of plants in mediterranean-climate regions. Pp. 303–307. In: di Castri, F., Goodall, D. W. & Specht, R. L. (eds), Mediterraneantype shrublands. Elsevier, New York.

    Google Scholar 

  • Moro, M. J., Pugnaire, F. I., Haase, P. & Puigdefábregas, J. 1997a. Mechanisms of interaction between a leguminous shrub and its understorey in a semi-arid environment. Ecography 20: 175–184.

    Google Scholar 

  • Moro, M. J., Pugnaire, F. I., Haase, P. & Puigdefábregas, J. 1997b. Effect of the canopy of Retama sphaerocarpa on its understorey in a semiarid environment. Funct. Ecol. 11: 425–431.

    Google Scholar 

  • Nilsen, E. T., Sharifi, M. R., Rundel, P. W., Jarrell, W. M. & Virginia, R. A. 1983. Diurnal and seasonal water relations of the desert phreatophyte Prosopis glandulosa (honey mesquite) in the Sonoran Desert of California. Ecology 64: 1381–1393.

    Google Scholar 

  • Nilsen, E. T., Sharifi, M. R., Rundel, P. W. & Virginia, R. A. 1987. Phenology of warm desert phreatophytes: seasonal growth and herbivory in Prosopis glandulosa var. torreyana (honey mesquite). J. Arid Environ. 13: 217–229.

    Google Scholar 

  • Orshan, G. 1954. Surface reduction and its significance as a hydroecological factor. J. Ecol. 42: 442–444.

    Google Scholar 

  • Pugnaire, F. I., Haase, P. & Puigdefábregas, J. 1996a. Facilitation between higher plant species in a semiarid environment. Ecology 77: 1420–1426.

    Google Scholar 

  • Pugnaire, F. I., Haase, P., Puigdefábregas, J., Cueto, M., Incoll, L. D. & Clark, S. C. 1996b. Facilitation and succession under the canopy of a leguminous shrub, Retama sphaerocarpa, in a semi-arid environment in south-east Spain. Oikos 76: 455–464.

    Google Scholar 

  • Puigdefábregas, J., Alonso, J. M., Delgado, L., Domingo, F., Cueto, M., Gutiérrez, L., Lázaro, R., Nicolau, J. M., Sánchez, G., Solé, A., Torrentó, J. R., Vidal, S., Aguilera, C., Brenner, A. J., Clark, S. C. & Incoll, L. D. 1996. The Rambla Honda field site: Interactions of soil and vegetation along a catena in semi-arid SE Spain. Pp. 137–168. In: Thornes, J. B & Brandt, J. (eds), Mediterranean Desertification and Land Use. John Wiley, New York.

    Google Scholar 

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Authors and Affiliations

  1. Department of Biology, University of Leeds, Leeds, LS2 9JT, UK

    Peter Haase, S.C. Clark & L.D. Incoll

  2. Dyckerhoffstrasse 3, 49525, Lengerich, Germany

    Peter Haase

  3. Estación Experimental de Zonas Áridas, General Segura 1, E-04001, Almería, Spain

    Francisco I. Pugnaire

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  1. Peter Haase
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  2. Francisco I. Pugnaire
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  3. S.C. Clark
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  4. L.D. Incoll
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Haase, P., Pugnaire, F.I., Clark, S. et al. Dynamics of cohorts of cladodes and related effects on reproduction in the shrub Retama sphaerocarpa in semi-arid south-eastern Spain. Plant Ecology 146, 105–115 (2000). https://doi.org/10.1023/A:1009817100422

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