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Plant communities and phytogeographical position of a large depression in the Great Chaco, Argentina

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Abstract

A survey is presented of the vegetation of the central region of the Santafesinian Chaco (Argentina), a scarcely populated flat area of 20 000 km2, with seasonal flooding. Soils have a strong halo-hydromorphic character and vegetation is basically halophilous. Trees are scarce and most communities are savannas, grasslands or swampy vegetation. Twenty-three communities are described, some of them with several variants. The most widespread communities areSpartina argentinensis grasslands,Elyonurus muticus savannas and a complex of hygrophilous communities. The most important communities are distributed in relation to a topographical gradient, and their structure is shaped by recurrent flooding and fire disturbance. Most of the area is virgin land with very little human interference. The phytogeographical position of the area is discussed.

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Author notes

  1. D. E. Prado

    Present address: Department of Biology, Sir Harold Mitchell Building, University of St. Andrews, KY16 9TH, St. Andrews, Scotland, United Kingdom

Authors and Affiliations

  1. Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe 2051, 2000, Rosario, Argentina

    J. P. Lewis, E. F. Pire, D. E. Prado, Susana L. Stofella, E. A. Franceschi & Nélida J. Carnevale

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  1. J. P. Lewis
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  2. E. F. Pire
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  3. D. E. Prado
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  4. Susana L. Stofella
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  5. E. A. Franceschi
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  6. Nélida J. Carnevale
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Additional information

Nomenclature: Burkart, A. 1969, 1974, 1979. Flora ilustrada de Entre Rios, INTA, Buenos Aires, and Cabrera, 1963, 1965a, b, 1967, 1968, 1970. Flora de la Provincia de Buenos Aires, INTA, Buenos Aires.

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Lewis, J.P., Pire, E.F., Prado, D.E. et al. Plant communities and phytogeographical position of a large depression in the Great Chaco, Argentina. Vegetatio 86, 25–38 (1990). https://doi.org/10.1007/BF00045133

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