VEGETACIÓN DE UN ÁREA POLDERIZADA DEL RÍO DE LA PLATA EN LA CIUDAD DE BUENOS AIRES: LA RESERVA ECOLÓGICA CIUDAD UNIVERSITARIA - COSTANERA NORTE.

Vegetation of a Río de la Plata polderized area in Buenos Aires City: the "Ciudad Universitaria - Costanera Norte" Ecological Reserve.

Coastal reclamation constitutes a world trend and can result in new ecosystems adapted to the new coastal configuration. In Buenos Aires City, the "Ciudad Universitaria - Costanera Norte" Ecological Reserve (RECU-CN) constitutes one example of the expansion of the coastline in the Río de la Plata sector, carried out in the late 1960s. Given the lack of published works generated systematically that cover the entire area, we set as the objective to describe the RECU-CN vascular plant vegetation. For this, a systematic sampling was carried out in 79 plots of 25 m2, where the coverage of each of the vascular plant species present was registered. We identified 154 taxa, corresponding to 144 species, 123 genus and 58 families, and the total richness was estimated as 238 species. Trees and herbs had the highest coverage of all life forms. Through multivariate analysis, three vegetation units (Wetland, Forest and Grassland with groves) and 10 vascular plant communities were recognized. Vegetation was ordered according to two gradients: one of flood and another of anthropization. From the comparison with the typical plant communities of the region, similarities were found only with those registered in the Wetland unit. Results highlight that both the coexistence of physiognomically diverse vegetation units, as well as the native composition found in the plant communities of the Wetland unit, constitute main conservation values of the protected area. [ABSTRACT FROM AUTHOR]

La expansión de la línea de costa por rellenos de origen antrópico constituye una tendencia mundial, pudiendo generar nuevos ecosistemas adaptados a la nueva configuración costera. En la ciudad de Buenos Aires, la Reserva Ecológica Ciudad Universitaria - Costanera Norte (RECU-CN) constituye un ejemplo de la expansión de la línea de costa en el Río de la Plata, realizada a fines de la década de 1960. Ante la falta de trabajos publicados generados en forma sistemática y que abarquen toda el área, se planteó como objetivo describir la vegetación de plantas vasculares de la RECU-CN. Para ello se realizó un muestreo sistemático en 79 parcelas de 25 m2, donde se relevó la cobertura de cada una de las especies de plantas vasculares presentes. Se registraron 154 taxones correspondientes a un total de 144 especies, 123 géneros y 58 familias y se estimó la riqueza total del área en 238 especies. Las formas de vida de mayor cobertura fueron los árboles y las hierbas. [ABSTRACT FROM AUTHOR]

Copyright of Darwiniana is the property of Instituto de Botanica Darwinion and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)