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      Preferencia de forofito por los líquenes en el bosque chaqueño oriental Translated title: Preference of phorophyte by the lichens in the eastern Chaco forest

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          Abstract

          Los líquenes epifitos y corticícolas dependen del sustrato para su supervivencia, crecen sobre árboles, son un recurso no maderero y sobre ellos se desarrollan gran cantidad de insectos. Una gran área del norte de la República Argentina es ocupada por el bosque chaqueño, con árboles de buena madera. La tala indiscriminada de este bosque pone en peligro su subsistencia y la de las especies liquénicas que viven en él. Se describió la comunidad liquénica del Chaco oriental, un ambiente xerofítico, sobre los tres forofitos (especies arbóreas dominantes) más favorables de ese bosque. Se utilizó la técnica de Braun Blanquet en la obtención de los datos, técnica de ordenación (análisis de componentes principales), índice de Shannon y estadística descriptiva para el análisis de los mismos. Se encontró un total de 21 especies, siendo el sustrato más favorable para el desarrollo de líquenes Zizyphus mistol, con un total de 20 especies. Sobre Prosopis pugionata se registraron 16 especies y 15 sobre Aspidosperma quebracho-blanco. Se discute la existencia de comunidades de líquenes presentes en el bosque chaqueño.

          Translated abstract

          The epiphyte, corticolous lichen community depends on substrate to survive, they grow on trees being a non-timber resource. Many insects develop on it. The Chaco forest, a xerophytes environment, covers an extensive area in the north of Argentina with fine wood trees. The destruction of the forest jeopardizes the lichen community. The lichen community (life forms, structure and cover) is analyzed on the three most important phorophyte (dominant trees) in Chaco forest. Braun Blanquet techniques were used to obtain the data, an ordination technique (Principal Components Analysis), and Shannon index descriptive statistics to analyze them. 21 species are reported, the most favorable substrate was Zizyphus mistol with a total of 20 species. 16 species were registered on Prosopis pugionata, and 15 on Aspidosperma quebracho-blanco. The presence of lichen communities in the Chaco forest is discussed.

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          Most cited references17

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          Habitat fragmentation effects on trophic processes of insect-plant food webs.

          Habitat fragmentation is the transformation of once-extensive landscapes into smaller isolated remnants surrounded by new types of habitat. There is ample evidence of impoverished biodiversity as a consequence of habitat fragmentation, but its most profound effects may actually result from functional changes in ecological processes such as trophic interactions. We studied the trophic processes of herbivory and parasitism in insect-plant food webs composed of hundreds of species in a fragmented woodland landscape. We recorded all plant species, collected mined leaves, and reared leafminers and parasitoids from 19 woodland remnants. Herbivory and parasitism rates were then analyzed in relation to woodland size and edge or interior location. Herbivory by leaf-mining insects and their overall parasitism rates decreased as woodland remnants became smaller For each remnant the intensity of both processes differed between edge and interior Our results provide novel evidence of the magnitude of habitat fragmentation effects, showing they can be so pervasive as to affect trophic processes of highly complex food webs and suggesting a response associated with trophic specialization of the involved organisms as much as with their trophic level.
            • Record: found
            • Abstract: not found
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            Fitogeografia de la República Argentina

              • Record: found
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              • Article: not found

              A Single Mechanism to Account for Regular, Random and Aggregated Populations

              E Pielou (1960)

                Author and article information

                Journal
                bosque
                Bosque (Valdivia)
                Bosque (Valdivia)
                Universidad Austral de Chile, Facultad de Ciencias Forestales (Valdivia, , Chile )
                0717-9200
                2007
                : 28
                : 1
                : 46-49
                Affiliations
                [01] Córdoba orgnameUniversidad Nacional de Córdoba orgdiv1Facultad de Ciencias Exactas, Físicas y Naturales orgdiv2Centro de Ecología y Recursos Naturales Dr. Ricardo Luti Argentina cecilia.estrabou@ 123456gmail.com
                Article
                S0717-92002007000100007 S0717-9200(07)02800107
                10.4067/S0717-92002007000100007
                abcf8c8a-1d24-440f-b1d7-0cab158be899

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

                History
                : 01 December 2005
                : 26 January 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 17, Pages: 4
                Product

                SciELO Chile

                Categories
                ARTICULOS

                diversidad,bosque chaqueño,líquenes,comunidad,diversity,Chaco forest,lichens,community

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