Abstract
The potential allelopathic role of Artemisia herba-alba has been evaluated in order to explain the community pattern of the gypsum semiarid environments of central Spain. This pattern shows a sharp ecotone between a gypsophile sparse shrubby community dominated by Helianthemum squamatum, which grows on slopes with gypsum surface crusts, and a nitrohalophilous community on the gypsum alluvial soils of piedmont dominated by Artemisia herba-alba. In order to explain this pattern, resource limitation was discarded because no significant differences in several soil parametrers, but fine earth fraction and organic matter content, had been detected in a previous study. Results confirm the inhibitory effect of aqueous extracts on the final germination percentage of scarified seeds of Helianthemum squamatum and also on the shape of the germination curves, which indicate delay of germination for the aqueous extracts. Assays with soil of the Artemisiacommunity (three types) showed that germination was strongly inhibited in soils obtained below the canopy of mature plants (litter maintained) and retarded in the other treatments. We suggest that the spatial community pattern detected in this gypsum environment and characterised by a sharp ecotone could be at least partially controlled by interference through allelopathy. This determines the excliusion of Helianthemum squamatum plants from alluvial soils.
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Aerts, R. J., Snoijer, W., Van der Meijden, E. & Verpoorte, R. 1991. Allelopathic inhibition of seed germination by Cinchona alcaloids?. Phytochemistry 30: 2947–2951.
Bazzaz, F. A. 1990. Plant-plant interactions in successional environments. Pp. 239–263. In: Grace, J.B. & Tilman, D. (eds), Perspectives on plant competition. Academic Press, San Diego.
Bellot, F. 1952. Propuesta de un nuevo orden para el círculo de vegetació n mediterráneo:Gypsophiletalia ord. nov. prov. incluible en la claseOnonido-Rosmarinetea Br.-Bl. Trabajos del Jardín Botánico de Santiago de Compostela 5: 3–14.
Bonner, J. 1950. The role of toxic substances in the interactions of higher plants. Bot. Rev. 16: 51–65.
Callaway, R. M. & Walker, L. 1997 Competition and facilitation: a synthetic approach to interactions in plant communities. Ecology 78: 1958–1965.
Cossini Lokar, L., Maurich, V., Mellerio, G., Moneghini, M. & Poldini, L. 1987. Variation in terpene composition of Artemisia alba in relation to environmetal conditions. Biochem. Syst. Ecol. 15: 327–333.
Duke, S. O., Vaughn, E. M., Croom, J. & Elsohly, H. N. 1987. Artemisin, a constituent of annual wormwood (Artemisia annua), is a selective phytotoxin. Weed Sci. 5: 499–505.
Einhellig, F. A. 1986. Bioassays in the study of allelopathy. Pp. 133–146. In: Putnam, A. R. & Tang C. S. (eds), The science of allelopathy. John Wiley, New York.
Escudero, A., Carnes, L. F. & Pérez-García, F. 1997. Seed germination of gypsophytes and gypsovags in semi-arid central Spain. J. Arid Environ. 36: 487–497.
Escudero, A., Somolinos, R. C., Olano, J. M. & Rubio, A. 1999. Factors controlling the establishment of Helianthemum squamatum, an endemic gypsophile of semi-arid Spain. J. Ecol. 87: 290–302.
Evenari, M., Shanan, L. & Tadmor, N. 1982. The Negev. The challenge of a desert. Harvard University Press, Cambridge.
Fowler, N. 1986. The role of competition in plant comunities in arid and semiarid regions. Annu. Rev. Ecol. Syst. 17: 89–110.
Franco, A. C. & Nobel, P. S. 1989. Effect of nurse plants on the microhabitats and growth of cacti. J. Ecol. 77: 870–886.
Friedman, J. 1987. Allelopathy in desert ecosystems. Pp. 51–68. In: Waller, G.R. (ed.), Allelochemicals: role in agriculture and forestry. Chemical Society, Washington.
Friedman, J. 1995. Allelopathy, autotoxicity, and germination. Pp. 599–628. In: Kigel, J. & Galili, G. (eds), Seed development and germination. Marcel Dekker, Inc., New York.
Friedman, J. & Orshan, G. 1975. The distribution, emergence and survival of seedlings of Artemisia herba-alba Asso in the Negev desert of Israel in relation to distance from the adult plants. J. Ecol. 63: 627–632.
Friedman, J., Orshan, G. & Ziger-Cfir, Y. 1977. Suppression of annuals by Artemisia herba-alba in the Negev desert of Israel. J. Ecol. 65: 413–426.
Goldberg, D. & Novoplansky, A. 1997. On the relative importance of competition in unproductive environments. J. Ecol. 85: 409–418.
Haase, P., Pugnaire, F. I., Clark, S. C. & Incoll, L. D. 1996. Spatial patterns in a two-tiered semi-arid shrubland in southeastern Spain. J. Veg. Sci. 7: 527–534.
Halligan, J. P. 1975. Toxic terpenes from Artemisia californica. Ecology 56: 999–1003.
Halligan, J. P. 1976. Toxicity of Artemisia californica to four associated herb species. Am. Midland Nat. 95: 406–421.
Izco, J. 1984. Madrid verde. Ministerio de Agricultura, Pesca y Alimentació n, Madrid.
Katz, D.A., Sneh, B. & Friedman, J. 1987. The allelopathic potential of Coridothymus capitatus L. (Labiatae). Preliminary studies on the roles of the shrub in the inhibition of annuals germination and/or to promote allelopathically active actinomycets. Plant Soil 98: 53–66.
Keeley, J. E. & Keeley, S. C.1981.Chaparral. Pp. 165–208. In: Barbour, M. G. & Billinigs, W. D. (eds), North American Terrestrial Vegetation. Cambridge University Press, New York.
Keeley, S. C. & Keeley, J. E.1981. The role of allelopathy, heat, and charred wood on the germination of chaparral herbs. Pp. 128–134. In: Conrad, C. E. & Oechel, W. C. (eds), Dynamics and management of Mediterranean-Type ecosystems. USDA Forest Ser. Gen. Tech. Report PSW-58.
Kigel, J. 1995. Seed germination in arid and semiarid regions. Pp. 645–699. In: Kigel, J. & Galili, G. (eds), Seed development and germination. Marcel Dekker, Inc. New York.
Knipe, D. & Herbel, C. H. 1966. Germination and growth of some semi-desert grassland species treated with aqueous extract from creosote bush. Ecology 47: 775–781.
Ló pez-González, J. 1993. Helianthemum squamatum (L.) Dum. Cours. P. 370. In: Castroviejo, S. et al. (eds), Flora Iberica, Vol. 3. Real Jardín Botánico, C.S.I.C., Madrid.
McAuliffe, J. R. 1994. Landscape evolution, soil formation, and ecological patterns and processes in sonoran desert bajadas. Ecol. Monogr. 64: 111–148.
McPherson, J. K. & Muller, C. H. 1969. Allelopathic effects of Adenostoma fasciculatum, 'chamise', in the California chaparral. Ecol Monogr. 39: 177–198.
Meyer, S. E. 1986. The ecology of gypsophile endemism in the eastern Mojave desert. Ecology 67: 1303–1313.
Meyer, S. E. & García-Moya, E. 1989. Plant community patterns and soil moisture regime in gypsum grasslands of north central Mexico. J. Arid Environ. 16: 147–155.
Meyer, S. E., García-Moya, E. & Lagunes, A. L. C. 1992. Topographic and soil effects on gypsophile plant community patterns in central Mexico. J. Vege. Sci. 3: 429–438.
Muller, C. H. 1953. The association of desert annuals with shrubs. Am. J. Bot. 40: 53–60.
Muller, W. H. & Muller, C. H. 1956. Association patterns involving desert plants that contain toxic products. Am. J. Bot. 43: 354–361.
Muller, C. H., Hanawalt, R. B. & McPherson, J. K. 1968. Allelophatic control of herb growth in the fire cycle of Californian chaparral. Bull. Torrey Bot. Club 95: 225–231.
Muller, C. H., Muller, W. H. & Haines, B. L. 1964. Volatile growth inhibitors produced by aromatic shrubs. Science 143: 471–473.
Nilsson, M. C. 1994. Separation of allelopathy and resource competition by the boreal dwarf shrub Empetrum hermaphroditum Hagerup. Oecologia 98: 1–7.
Paz. H., Mazer, S. J. & Martínez-Ramos, M. 1999. Seed mass, seedling emergence, and environmental factors in seven rain forest Psychotria (Rubiaceae). Ecology 80: 1594–1606.
Pérez-García, F., Iriondo, J. M., González-Benito, M. E., Carnes, L. F., Tapia, J., Prieto, C., Plaza, R. & Pérez, C. 1995. Germination studies in endemic plant species of the Iberian Peninsula. Israel J. Plant Sci. 43: 239–247.
Pugnaire, F. I., Haase, P., Puigdefábregas, J., Cueto, M., Incoll, L.D. & Clark, S. C. 1996. Facilitation and succesion under the canopy of a leguminous shrub in a semi-arid environment in south-east Spain. Oikos 76: 455–464.
Pyke, D. A & Thompson, J. N. 1986. Statistical analysis of survival and removal rate experiments. Ecology 77: 1420–1426.
Rice, E. L. 1984. Allelopathy. Academic Press, Orlando.
Rivas-Martínez, S. & Costa, M. 1970. Comunidades gipsícolas del centro de Españ a. Anales del Instituto Botánico Cavanilles 27: 193–224.
Sala, O E, Lauenroth W K & Golluscio, R A 1997. Plant functional types in temperate semi-arid regions. Pp. 217-233. In:. Smith, T. M., Shugart, H. H. & Woodward, F. I. (eds), Plant functional types. Cambridge Univ. Press, Cambridge.
Silvertown, J. W. & Wilson, J. B. 1994. Community structure in a desert perennial community. Ecology 75: 409–417.
Somolinos, R. C. 1997. Factores que afectan al reclutamiento de Helianthemum squamatum (L.) Dum Cours. Un endemismo gipsó filo de la Península Ibérica. Universidad Complutense de Madrid, Madrid.
Stanton, M. L. 1985. Seed size and emergence time within a stand of wild radish (Raphanus raphanistrum L.): the establishment of a fitness hierarchy. Oecologia 67: 524–531.
Stowe, L. G. 1979. Allelopathy and its influence on the distribution of plants in an Illinois old field. J. Ecol. 67: 1065–1085.
Strong, D. R. 1986. Density vagueness: abiding the variance in the demography of real populations. Pp. 257–268. In: Diamond, J. & Case, T. J. (eds), Community ecology. Harper & Row, New York.
Valiente-Banuet, A., Bolongaro-Crevenna, A., Briones, O., Ezcurra, E., Rosas, M., Nuez, H., Barnard, G. & Vázquez, E. 1991. Spatial relationships between cacti and nurse shrubs in a semi-arid environment in central Mexico. J. Vege. Sci. 2: 15–20.
Wardle, D. A., Nicholson, K. S. & Rahman, A. 1996. Use of a comparative approach to identify allelopathic potential and relationship between allelopathy bioassays and 'competition' experiments for ten grassland and plant species. J. Chem. Ecol. 22: 933–948.
Yeaton, R. I. & Manzanares, A. R. 1986. Organization of vegetation mosaics in the Acacia shaffneri-Opuntia streptacantha association, Southern Chihuahuan desert, Mexico. J. Ecol. 74: 211–217.
Zar, J. H. 1984. Biostatistical analysis. 2nd. Prentice-Hall, Englewood Cliffs, New Jersey.
Zohary, M. 1973. Geobotanical foundations of the Middle East, Vols. 1 and 2. Gustav-Fischer, Stuttgart.
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Escudero, A., Albert, M.J., Pita, J.M. et al. Inhibitory effects of Artemisia herba-alba on the germination of the gypsophyte Helianthemum squamatum. Plant Ecology 148, 71–80 (2000). https://doi.org/10.1023/A:1009848215019
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DOI: https://doi.org/10.1023/A:1009848215019