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Ecological and phylogenetic patterns of carbon isotope discrimination in the winter-rainfall flora of the Richtersveld, South Africa

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Abstract

Leaf tissues of vascular plant species from the arid Richtersveld of northern Namaqualand (Succulent Karoo), South Africa, show a great range of variation in carbon isotope discrimination. Analyses of Δ values for species with obligate C3 metabolism demonstrated that the water use efficiency indicated by these values varies between species and within a species population both between seedlings and mature shrubs and between sites along an aridity gradient. An expected pattern of increasing water use efficiency with greater longevity in these species was not present, however. Only among ephemerals were there taxa with high Δ values associated with low water use efficiency, but these high values were balanced by other ephemeral species with low Δ values comparable to those typical of moderate to long-lived shrubs. The extent to which putative CAM species in the succulent flora rely entirely on nocturnal carbon fixation is highly variable. Species of Crassulaceae and Aloe (Asphodelaceae) relied almost exclusively on CAM photosynthesis, although Crassulaceae from more mesic environments may be CAM-flexible. Succulent-leaved species of Senecio and leaves of stem-succulent Euphorbia were CAM-flexible in their Δ values, while shrubby species of Ceraria (Portulacaceae) appeared to rely primarily on C3 photosynthesis. Variable patterns of reliance on CAM photosynthesis were present in the ecologically dominant Mesembryanthema of the Aizoaceae. Shrubby species of the subfamily Mesembryanthemoideae, although capable of CAM-flexibility in less xeric habitats, relied largely on CAM fixation of carbon in our field sites. Within the subfamily Ruschioideae, there was a wide range of Δ values indicating species with CAM, CAM flexibility, and primary reliance on C3 photosynthesis. Low Δ values indicative of typical CAM fixation were associated with species with greater longevity, suggesting that a positive correlation may exist between the degree of reliance on CAM photosynthesis and plant life span.

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References

  • Arnold, T. H. & De Wet, B. C. 1993. Plants of southern Africa: names and distribution. Mem. Bot. Surv. S. Afr. No. 62.

  • Bittrich, V. & Hartmann, H. 1988. The Aizoaceae-a new approach. Bot. J. Linn. Soc. 97: 239-254.

    Google Scholar 

  • Brooks, J. R., Flanagan, L. B., Buchmann, N. & Ehleringer, J. R. 1997. Carbon isotope composition of boreal plants: functional grouping of life forms. Oecologia 110: 301-311.

    Google Scholar 

  • Brulfert, J., Ravelomanana, D., Guclu, S. & Kluge, M. 1996. Ecophysiological studies in Kalanchoe porphyrocalyx (Baker) and K. miniata (Hils et Bojer), two species performing highly flexible CAM. Photosynth. Res. 49: 29-36.

    Google Scholar 

  • Chesselet, P., Mossmer, M. & Smith, G. F. 1995. Research priorities in the succulent family Mesembryanthemaceae Fenzl. S. Afr. J. Sci. 91: 197-209.

    Google Scholar 

  • Cowling, R. M., Esler, K. J., Midgely, G. F.&Hönig, M. A.1994. Plant functional diversity, species diversity and climate in arid and semi-arid southern Africa. J. Arid Environ 27: 141-158.

    Google Scholar 

  • Cowling, R. M., Esler, K. J. & Rundel, P. W. 1999. Namaqualand, South Africa-a unique winter-rainfall desert ecosystem. Plant Ecol. 142: 3-21 (this issue).

    Google Scholar 

  • Cowling, R. M., Rundel, P. W., Desmet, P. G. & Esler, K. J. 1998. Extraordinary high regional-scale plant diversity in southern African arid lands: subcontinental and global comparisons. Div. Distr. 4: 27-36.

    Google Scholar 

  • Desmet, P. G. & Cowling, R. M. 1999a. The climate of the Karoo-a functional approach. In: Dean, W. R. J. & Milton, S. J. (eds.) The Karoo: ecological patterns and processes. Cambridge University Press, Cambridge (in press).

    Google Scholar 

  • Desmet, P. G. & Cowling, R. M. 1999b. Biodiversity, habitat and range-size aspects of a flora from a winter rainfall desert in arid northwestern Namaqualand, South Africa. Plant Ecol. 142: 23-33 (this issue).

    Google Scholar 

  • Donovan, L. A. & Ehleringer, J. R. 1994. Carbon isotope discrimination, water-use efficiency, growth and mortality in a natural shrub population. Oecologia 100: 347-354.

    Google Scholar 

  • Ehleringer, J R. 1993a. Variation in leaf carbon isotope discrimination in Encelia farinosa: implications for growth, competition, and drought survival. Oecologia 95: 340-346.

    Google Scholar 

  • Ehleringer, J R. 1993b. Gas-exchange implications of isotopic variation in arid-land plants. Pp. 265-284. In: Smith, J. A. C. & Griffiths, H. (eds), Water deficits: plant responses from cell to community. BIOS Scientific Publishers, Oxford.

    Google Scholar 

  • Ehleringer, J. R. 1993c. Carbon and water relations of desert plants: an isotopic perspective. Pp. 155-172. In: Ehleringer, J. H., Hall, A. E. & Farquhar, G. D. (eds), Stable isotopes and plant carbonwater relations. Academic Press, San Diego.

    Google Scholar 

  • Ehleringer, J. R., Comstock, J. P. & Cooper, T. A. 1987. Leaf-twig differences in carbon isotope ratio in twig-photosynthesizing desert shrubs. Oecologia 71: 318-320.

    Google Scholar 

  • Ehleringer, J. R. & Cooper, T. A. 1988. Correlations between carbon isotope ratio and microhabitat in desert plants. Oecologia 88: 430-434.

    Google Scholar 

  • Ehleringer, J. R., Rundel, P. W., Palma, B. & Mooney, H. A. 1998. Carbon isotope ratios of Atacama Desert plants reflect hyperaridity of region. Rev. Chil. Hist. Nat. 71: 79-86.

    Google Scholar 

  • Ehleringer, J. R., Phillips, S. L. & Comstock, J. P. 1992. Seasonal variation in the carbon isotopic composition of desert plants. Functional Ecol. 6: 296-304.

    Google Scholar 

  • Eller, B. M. & Ferrari, S. 1997. Water use efficiency of two succulents with contrasting CO2 fixation pathways. Plant Cell Env. 20: 93-100.

    Google Scholar 

  • Esler, K. J. & Rundel, P. W. 1999. Comparative patterns of phenology and growth form diversity in two winter rainfall deserts: the succulent Karoo and Mojave Desert ecosystem. Plant Ecol. 142: 97-104 (this issue).

    Google Scholar 

  • Esler, K. J., Rundel, P. W. & Cowling, R. H. 1999. The Succulent Karoo in a global context: plant structural and functional comparison with North American winter rainfall deserts. In: Dean, W. R. J. & Milton, S. J. (eds), The Karoo: ecological patterns and processes. Cambridge University Press, Cambridge (in press).

    Google Scholar 

  • Farquhar, G. D., O'Leary, M. H. & Berry, J. A. 1982. On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration of leaves. Aust. J. Plant Physiol. 9: 121-137.

    Google Scholar 

  • Guralnick, L. J., Heath, R. L., Goldstein, G. & Ting, I. P. 1992. Fluorescence quenching in the varied photosynthetic modes of Portulacaria afra (L.) Jacq. Plant Physiol. 99: 1309-1313.

    Google Scholar 

  • Herppich, W. B., Herppich, M. & Von Willert, D. J. 1992. The irreversible C3to CAM shift in well-watered and salt-stressed plants of Mesembryanthemum crystallinum is under strict ontogenetic control. Bot. Acta 105: 34-40.

    Google Scholar 

  • Herppich, W. B., Midgely, G., Von Willert D. J. & Veste, M. 1996. Flexible physiology of the leaf succulent Delosperma tradescantiodes (Bgr.) L. Bol. (Mesembryanthemaceae), native to southern Africa. Physiol. Plant. 98: 485-492.

    Google Scholar 

  • Ihlenfeldt, H.-D. 1994. Diversification in an arid world: the Mesembryanthemaceae. Ann. Rev. Ecol. Syst. 25: 521-546.

    Google Scholar 

  • Johnson, D. A., Asay, K. H., Tieszen, L. L., Ehleringer, J. R. & Jefferson, P. G. 1990. Carbon isotope discrimination-potential in screening cool-season grasses for water-limited environments. Crop Sci. 30: 338-343.

    Google Scholar 

  • Jürgens, N. 1986. Untersuchungen zur Ökologie sukkulenter Pflanzen des südlichen Afrika. Mitt. Inst. Allg. Bot. Hambg. 21: 139-365.

    Google Scholar 

  • Kelly, C. K. & Woodward, F. I. 1995. Ecological correlates of carbon isotope composition of leaves: a comparative analysis testing for the effects of temperature, CO2 and O2 partial pressures and taxonomic relatedness on delta-13C. J. Ecol. 83: 509-515.

    Google Scholar 

  • Kluge, M. & Ting, I. P. 1978. Crassulacean acid metabolism. Springer Verlag, Berlin.

    Google Scholar 

  • Lee, D. M. & Assmann, S. M. 1992. Stomatal response to light in the facultative Crassulacean acid metabolism species Portulacaria afra. Physiol. Plant. 85: 35-42.

    Google Scholar 

  • Low, A. B. & Rebelo, T. G. 1996. Vegetation of South Africa, Lesotho and Swaziland. Dept. Environmental affairs & Tourism, Pretoria.

    Google Scholar 

  • Martin, C. E., Higley, M. & Wang, W.-Z. 1988. CAM-cycling and CAM-idling in Drosanthemum hispidum (L.) Schwant. (Mesembryanthemaceae). J. Plant Physiol. 132: 303-306.

    Google Scholar 

  • Mooney, H. A., Troughton, J. H. & Berry, J. A. 1977. Carbon isotope measurements of succulent plants in southern Africa. Oecologia 30: 295-305.

    Google Scholar 

  • Mulroy, T. W. & Rundel, P. W. 1977. Annual plants: adaptations to desert environments. Bioscience 27: 109-114.

    Google Scholar 

  • O'Leary, M. H. 1988. Carbon isotopes in photosynthesis. Bioscience 38: 328-336.

    Google Scholar 

  • Rundel, P. W., Cowling, R. M., Esler, K. J., Mustart, P. M., Van Jaarsveld, E. & Bezuidenhout, H. 1995. Winter growth phenology and leaf orientation in the stem succulent Pachypodium namaquanum (Apocynaceae) in the succulent Karoo of the Richtersveld, South Africa. Oecologia 101: 472-477.

    Google Scholar 

  • Rundel, P.W., Ehleringer, J. R. & Nagy, K. A. 1989. Stable isotopes in ecological research. Springer Verlag, New York.

    Google Scholar 

  • Rundel, P.W. & Sharifi, M. R. 1993. Carbon isotope discrimination and resource availability in the desert shrub Larrea tridentata. Pp. 173-185, In: Ehleringer, J. H., Hall, A. E. & Farquhar, G. D. (eds), Stable isotopes and plant carbon-water relations. Academic Press, San Diego.

    Google Scholar 

  • Sandquist, D. R., Schuster, W. S. F., Donovan, L. A., Phillips, S. L. & Ehleringer, J. R. 1993. Differences in carbon isotope discrimination between seedlings and adults of Southwestern desert perennial plants. Southwest. Nat. 38: 212-217.

    Google Scholar 

  • Schuster, W. S. F., Sandquist, D. R., Phillips, S. L. & Ehleringer, J. R. 1992. Comparisons of carbon isotope discrimination in populations of aridland plant species differing in lifespan. Oecologia 91: 332-337.

    Google Scholar 

  • Schuster, W. S. F., Sandquist, D. R., Phillips, S. L. & Ehleringer, J. R. 1994. High levels of genetic variation in populations of four dominant aridland plant species in Arizona. J. Arid Environ. 27: 159-167.

    Google Scholar 

  • Van Jaarsveld, E. J. 1987. The succulent riches of South Africa and Namibia. Aloe 24: 45-92.

    Google Scholar 

  • Von Willert, D. J., Brinckmann, E., Scheitler, B. & Eller, B. M. 1985. Availability of water controls CAM in succulents in the Richtersveld (Namib desert, South Africa). Planta 164: 44-55.

    Google Scholar 

  • Von Willert, D. J., Eller, B. M., Werger, M. J. A., Brinckmann, E. & Ihlenfeldt, H-D. 1992. Life strategies of succulents in deserts, with special reference to the Namib Desert. Cambridge University Press, Cambridge.

    Google Scholar 

  • Winter, K. & Troughton, J. H. 1978a. Photosynthetic pathways in plants of coastal and inland habitats of Israel and the Sinai. Flora 167: 1-34.

    Google Scholar 

  • Winter, K. & Troughton, J. H. 1978b. Carbon assimilation pathways in Mesembryanthemum nodiflorum L. under natural conditions. Z. Pflanzenphysiol. 88: 153-162.

    Google Scholar 

  • Winter, K. & Von Willert, D. J. 1972. NaCl-inducierter Crassulaceen Saurestoffwechsel bei Mesembryanthemum crystallinum. Z. Pflanzenphysiol. 67: 66-170.

    Google Scholar 

  • Ziegler, H. Batanouny, K. H., Sankhla, N., Vyas, O. P. & Stichler, W. 1981. The photosynthetic pathway types of some desert plants from India, Saudi Arabia, Egypt and Iraq. Oecologia 48: 93-99.

    Google Scholar 

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Authors
  1. Philip W. Rundel
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  2. Karen J. Esler
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  3. Richard M. Cowling
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Rundel, P.W., Esler, K.J. & Cowling, R.M. Ecological and phylogenetic patterns of carbon isotope discrimination in the winter-rainfall flora of the Richtersveld, South Africa. Plant Ecology 142, 133–148 (1999). https://doi.org/10.1023/A:1009878429455

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