23
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Hacia una fitogeografía histórica del Desierto de Atacama

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          El concepto de elemento florístico es fundamental en biogeografía histórica. En este trabajo se revisan los límites que han sido planteados para el Desierto de Atacama en términos florísticos, así como las relaciones fitogeográficas que diferentes autores han propuesto para el área. En un intento por identificar elementos florís-ticos en el Desierto de Atacama, Ia literatura filogenética es revisada e integrada con el conocimiento sobre la distribución de linajes presentes en el Desierto de Atacama. Cuatro elementos florísticos fueron identificados: (i) neotropical, (ii) chileno central, (iii) transandino y (iv) antitropical. Estos elementos son discutidos en el contexto de los posibles orígenes geográficos de Ia flora del Desierto de Atacama.

          Translated abstract

          The concept of floristic element is fundamental in historical biogeography. In this work the floristic boundaries of the Atacama Desert as well as the biogeographical relationships that have been proposed for the area are reviewed. In an attempt to identify floristic elements of the Atacama Desert, the phyIogenetic literature is reviewed and integrated with the knowledge about the geographical distribution of lineages present in the Atacama Desert. Four floristic elements were identified: (i) neotropical, (ii) Central Chilean, (iii) transandean and (iv) antitropical. These elements are discussed in the context of the possible geographical origins of the Atacama Desert flora.

          Related collections

          Most cited references279

          • Record: found
          • Abstract: not found
          • Article: not found

          Dispersal-Vicariance Analysis: A New Approach to the Quantification of Historical Biogeography

          F Ronquist (1997)
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Maximum likelihood inference of geographic range evolution by dispersal, local extinction, and cladogenesis.

            In historical biogeography, model-based inference methods for reconstructing the evolution of geographic ranges on phylogenetic trees are poorly developed relative to the diversity of analogous methods available for inferring character evolution. We attempt to rectify this deficiency by constructing a dispersal-extinction-cladogenesis (DEC) model for geographic range evolution that specifies instantaneous transition rates between discrete states (ranges) along phylogenetic branches and apply it to estimating likelihoods of ancestral states (range inheritance scenarios) at cladogenesis events. Unlike an earlier version of this approach, the present model allows for an analytical solution to probabilities of range transitions as a function of time, enabling free parameters in the model, rates of dispersal, and local extinction to be estimated by maximum likelihood. Simulation results indicate that accurate parameter estimates may be difficult to obtain in practice but also show that ancestral range inheritance scenarios nevertheless can be correctly recovered with high success if rates of range evolution are low relative to the rate of cladogenesis. We apply the DEC model to a previously published, exemplary case study of island biogeography involving Hawaiian endemic angiosperms in Psychotria (Rubiaceae), showing how the DEC model can be iteratively refined from inspecting inferences of range evolution and also how geological constraints involving times of island origin may be imposed on the likelihood function. The DEC model is sufficiently similar to character models that it might serve as a gateway through which many existing comparative methods for characters could be imported into the realm of historical biogeography; moreover, it might also inspire the conceptual expansion of character models toward inclusion of evolutionary change as directly coincident, either as cause or consequence, with cladogenesis events. The DEC model is thus an incremental advance that highlights considerable potential in the nascent field of model-based historical biogeographic inference.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Biogeographic areas and transition zones of Latin America and the Caribbean islands based on panbiogeographic and cladistic analyses of the entomofauna.

              Track and cladistic biogeographic analyses based on insect taxa are used as a framework to interpret patterns of the Latin American and Caribbean entomofauna by identifying biogeographic areas on the basis of endemicity and arranging them hierarchically in a system of regions, subregions, dominions, and provinces. The Nearctic region, inhabited by Holarctic insect taxa, comprises five provinces: California, Baja California, Sonora, Mexican Plateau, and Tamaulipas. The Mexican transition zone comprises five provinces: Sierra Madre Occidental, Sierra Madre Oriental, Transmexican Volcanic Belt, Balsas Basin, and Sierra Madre del Sur. The Neotropical region, which harbors many insect taxa with close relatives in the tropical areas of the Old World, comprises four subregions: Caribbean, Amazonian, Chacoan, and Parana. The South American transition zone comprises five provinces: North Andean Paramo, Coastal Peruvian Desert, Puna, Atacama, Prepuna, and Monte. The Andean region, which harbors insect taxa with close relatives in the Austral continents, comprises three subregions: Central Chilean, Subantarctic, and Patagonian.
                Bookmark

                Author and article information

                Journal
                rgeong
                Revista de geografía Norte Grande
                Rev. geogr. Norte Gd.
                Pontificia Universidad Católica de Chile. Instituto de Geografía (Santiago, , Chile )
                0718-3402
                December 2011
                : 50
                : 105-133
                Affiliations
                [01] orgnameFreie Universität Berlin orgdiv1Institut für Biologie-Botanik Alemania f.luebert@ 123456fu-berlin.de
                [02] Santiago orgnameUniversidad de Chile orgdiv1Facultad de Ciencias Forestales orgdiv2Departamento de Silvicultura Chile
                Article
                S0718-34022011000300007 S0718-3402(11)00005007
                10.4067/S0718-34022011000300007
                aae7fe19-7c20-4dc3-9bd7-beb0ccd96e5f

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 19 July 2010
                : 21 December 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 186, Pages: 29
                Product

                SciELO Chile

                Categories
                ARTÍCULOS

                Chile,Andes,Neotropics,biogeografía,Ambientes áridos,Peru,Biogeography,neotrópico,Perú,Arid environments

                Comments

                Comment on this article