La vegetación del Refugio Educativo de la Ribera Norte, partido de San Isidro, Pcia. De Buenos Aires, Argentina. Invasión de especies exóticas.

KALESNIK, FABIO ALBERTO; CAGNONI, MARCELA; BERTOLINI, MARÍA PAULA; QUINTANA, RUBEN DARIO; MADANES, NORA; MALVÁREZ, ANA INÉS

Insugeo, Miscelánea

Insugeo-CONICET

Lugar: San MIguel de Tucumán, Argentina; Año: 2005 vol. 14 p. 139 - 150

1514-4275

The present study was carried out in the “Refugio Educativo de la Ribera Norte”, a small urban natural reserve (c 10 ha) located on the De la Plata River shore. The objective of this work was to describe the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and c 10 ha) located on the De la Plata River shore. The objective of this work was to describe the vegetation of the different cover-types and to analyze the invasion process of alien plant species on them. Six plant communities were identified using classification and ordination techniques. Four of them were characterized by a herbaceous species dominance: “juncal” (Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and Schaenoplectus californicus), “verdolagal” (Ludwigia elegans), “camalotal” (Eichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- andEichhornia azurea ) and freshwater marsh (Zizaniopsis bonariensis, Iris psedacorus –an alien species from Europe- and Scirpus giganteus). The other two communities presented a forest phygsionomy and they had the highest species richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. and ). The other two communities presented a forest phygsionomy and they had the highest species richness. The mixed forest was characterized by patches of Tessaria integrifolia, Phyllanthus sellowianus, Salix spp. andTessaria integrifolia, Phyllanthus sellowianus, Salix spp. and Ligustrum sinense (alien species from Asia). The canopy of the willow forest was dominated by Salix spp. and it presented an important understory with the alien plant L. sinence as the most abundant species. Isolated individuals of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were presented an important understory with the alien plant L. sinence as the most abundant species. Isolated individuals of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were presented an important understory with the alien plant L. sinence as the most abundant species. Isolated individuals of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were presented an important understory with the alien plant L. sinence as the most abundant species. Isolated individuals of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were of native forest species such as Blepharocalyx tweediei and Myrceugenia glaucescens were found as well. From a total number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were number of 104 plant species found in the whole area, 15 were alien species (14.4%) and the most important were