Modeling spatial patterns of plant distribution as a consequence of hydrological dynamic processes in a Venezuelan flooding savanna

Autores/as

  • Eulogio Chacón Universidad de Los Andes image/svg+xml Autor/a https://orcid.org/0000-0002-5837-5505
    • Julia Smith Wageningen University & Research image/svg+xml Autor/a
      • Andrew K. Skidmore International Institute for Geo-Information Science and Earth Observation Autor/a
        • Hebert H. T. Prins Wageningen University & Research image/svg+xml Autor/a
          • Albert G. Toxopeus International Institute for Geo-Information Science and Earth Observation Autor/a

            Palabras clave:

            Digital elevation model (DEM), Embankment, Geographical Information System (GIS), Savanna ecosystems, Vegetation environment relationship

            Resumen

            This study presents the main results of the analysis and integration of ecological ordination and spatially explicit relationships into an ecological-spatial model. This allows understanding, evaluating and predicting the distribution of dominant plant species in a changing flooding savanna landscape affected by embankments in the plains of the Orinoco river (Llanos del Orinoco), Venezuela. An ecological analysis of the relationship between plant species and environmental factors (relative altitude and soil water content), and species response using Gaussian logistic models was carried out. These ecological responses are integrated into a spatial model using a Digital Elevation Model (DEM) providing elevation as a spatial variable. Plant distributions of the dominant species were mapped based on the ecological knowledge generated from the Gaussian responses and DEM. Plant species community composition gradually changes with flooding conditions and the dominant species have a strong relation to subtle soil water content variations. Leersia hexandra and Panicum laxum are the main dominant species, and present a complementary relation without niche overlapping, whereas Eleocharis intersticnta and Paspalum chaffanjonii are dominant in small areas with medium-low frequency and cover values. The model allows prediction of changes in savanna species diversity as a result of modified flooding regimes within the landscape.

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            Referencias

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            Publicado

            31-12-2007

            Número

            Vol. 20 Núm. 2 (2007)

            Sección

            Artículos de investigación

            Licencia

            Derechos de autor 2007 Eulogio Chacón, Julia Smith, Andrew K. Skidmore, Hebert H. T. Prins, Albert G. Toxopeus (Author)

            Creative Commons License

            Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.

            Cómo citar

            Modeling spatial patterns of plant distribution as a consequence of hydrological dynamic processes in a Venezuelan flooding savanna. (2007). Ecotropicos, 20(2), 55-73. https://ecotropicos.svecologia.org/index.php/home/article/view/87

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