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      Florística y estructura de dos espinares intervenidos en San Francisco, municipio Torres, estado Lara, Venezuela Translated title: Floristic and structure of two semiarid intervened horny in San Francisco, Torres municipality, Lara State, Venezuela

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          Abstract

          La diversidad de plantas en las regiones tropicales reviste gran importancia ya que esta biota ayuda a mantener la estabilidad del ecosistema, a la vez que muchas de ellas tienen utilidad económica. En este estudio se caracterizaron los aspectos florísticos y estructurales de dos espinares del semiárido de San Francisco, parroquia Montes de Oca, municipio Torres, estado Lara, Venezuela. Se realizaron muestreos desde abril 2010 hasta enero 2011.Se establecieron cinco subparcelas de 5 x 10 m, para cubrir un área total de 250 m² en cada localidad. Dentro de cada subparcela se muestrearon todos los individuos mayores o iguales de 2,5 cm de diámetro a la altura del pecho (DAP). Se encontraron 37 especies de la clase Magnoliopsida distribuidas en 32 géneros y 20 familias. Las familias con mayor número de especies fueron: Leguminosae (sensu lato) con ocho especies, Cactaceae con siete especies, Capparaceae y Euphorbiaceae con tres especies cada una, y Malvaceae y Rubiaceae con dos especies cada una. Los resultados señalan que para la localidad de San Francisco la clase diamétrica que predomina es 10,01-15,0 cm (DAP) y representa 28 % del total de individuos, mientras que para Santa Rosa predomina la clase diamétrica 15,01-20 cm (DAP) (29,1 % del total). Las especies con mayor IVI en San Francisco fueron Subpilocereus repandus, Mimosa arenosa y Malpighia emarginata, en Santa Rosa se destacaron Croton argyrophyllus, Pilocarpus goudotianus y Aspidosperma cuspa. Ambas zonas estudiadas presentan bajos valores de diversidad. Las clases altimétricas permitieron confirmar que la cobertura vegetal para San Francisco es un espinar xerófilo y en Santa Rosa un matorral bajo con árboles intercalados.

          Translated abstract

          The diversity of plants in tropical regions is very important because this biota helps maintain the stability of the ecosystem, while many of them have economic importance. In this study, floristic and structural aspects of two thorny semiarid ecosystems were characterized in San Francisco, Torres Municipality, Lara State, Venezuela. Sampling was made from April 2010 to January 2011. Five 5 x 10 m-subplots were established to cover a total area of 250 m² in each location. All individuals with diameter at breast height greater or equal to 2.5 cm were sampled at each subplot. Thirty seven species included in 32 genera and 20 families belonging from Magnoliopsida were found. Families with the higher number of species were: Leguminosae sensu lato with 8 species, Cactaceae with 7 species, Capparaceae and Euphorbiaceae with three species each, Malvaceae and Rubiaceae with two species each. Results indicated that in San Francisco the predominating diametric class varied from 10.01 to 15.0 cm (DBH), representing 28 % of the total number of individuals, while in Santa Rosa, varied from 15.01 to 20 cm DHB representing 23.91 % of the total number. The species with higher IVI in San Francisco were Subpilocereus repandus, Mimosa arenosa and Malpighia emarginata, while in Santa Rosa were Croton argyrophyllus, Pilocarpus goudotianus and Aspidosperma cuspa. Results showed that both studied areas have low diversity values. Based on altimetric classes we can state that predominat vegetation cover is a xeric thorny and a low scrub in San Francisco and Santa Rosa, respectively.

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          Most cited references26

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          Ecological Diversity and Its Measurement

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            Patterns in neotropical plant species diversity

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              Flora y vegetación del estado Táchira, Venezuela

              G Bono, J. Bono (1996)
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                ba
                Bioagro
                Bioagro
                Decanato de Agronomía de la Universidad Centroccidental "Lisandro Alvarado" (UCLA)
                1316-3361
                December 2015
                : 27
                : 3
                : 173-180
                Affiliations
                [1 ] Universidad Centroccidental Lisandro Alvarado Venezuela
                Article
                S1316-33612015000300006
                c52e0c61-e761-4b29-9241-5947a842458b

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Venezuela

                Self URI (journal page): http://www.scielo.org.ve/scielo.php?script=sci_serial&pid=1316-3361&lng=en
                Categories
                AGRICULTURE, MULTIDISCIPLINARY
                BIOLOGY
                ZOOLOGY

                General life sciences,General agriculture,Animal science & Zoology
                Floristic composition,Composición florística,fitosociológico,vegetación xerofítica,phytosociological,xeric vegetation

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