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Impact of fragmentation on vascular plant diversity in an andean forest in northeastern Colombia ; Impacto de la fragmentación en la diversidad de plantas vasculares en bosques andinos del nororiente de Colombia

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  • Additional Information
    • Publication Information:
      Universidad Distrital Francisco José de Caldas
    • Publication Date:
      2013
    • Collection:
      Universidad Distrital de la ciudad de Bogotá: Open Journal Systems
    • Abstract:
      We analyse the relationship between landscapescale variables (fragment area, shape, connectivity, altitude, edge contrast, forest type, etc.) and vascular plant richness in an Andean forest of northern Colombia. Using a vegetation map at a scale of 1:10000, we randomly selected 39 fragments (from a total of 700) in each of which we established a 200 m2 plot where we counted the total number of species of vascular plants. The sample consisted of fragments of between one ha and 840 ha at altitudes of between 1800 and 2800 m. In the 60 plots (1,2 ha in total) we found 108 families, 259 genera and 556 species of vascular plants. Species richness varied between 34 and 74 per 200 m2 plot. The analysis showed that the individual variables most closely related to species richness (according to the Pearson r coefficient) are the total area of the fragment (r = 0,43, p <0,001, n = 60), the central area of the fragment (r = 0,49, p <0,001, n = 60) and the fragment edge contrast (r = - 0,48, p <0,00, n = 60). Finally, we built multiple regression models to explain up to 32,6 % of the variation in species richness of each fragment. We discuss the usefulness of these models for the identification of small scale conservation priorities. ; En este trabajo analizamos la relación entre variables a escala del paisaje (área del fragmento, forma, conectividad, altitud, contraste de borde, tipo de bosque, etc.) y la riqueza de plantas vasculares en un bosque andino del norte de Colombia. Con base en un mapa de vegetación escala 1:10.000, seleccionamos 39 fragmentos al azar (de un total de 700) y en cada uno de ellos establecimos al menos una parcela de 200 m2 donde se contó el número total de especies de plantas vasculares. La muestra estuvo constituida por fragmentos entre 1 ha y 840 ha distribuidos en un gradiente altitudinal entre los 1800 y 2800 msnm. En las 60 parcelas establecidas (1.2 ha en total) encontramos 108 familias, 259 géneros y 556 especies de plantas vasculares, demostrando la alta biodiversidad que pueden ...
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Ecography, 33, 578 -589. doi:10.1111/j.1600-0587.2009.05762.x; https://revistas.udistrital.edu.co/index.php/colfor/article/view/4954
    • Online Access:
      https://doi.org/10.1073/pnas.1311491110
      https://revistas.udistrital.edu.co/index.php/colfor/article/view/4954
    • Accession Number:
      edsbas.642C2C0A