Análisis fitolíticos en suelos formados sobre antiguas terrazas del Río Uruguay (Colón, Entre Ríos): primera evidencia de retracción de los palmares de Butia yatay (Mart.) Becc.

NOELIA I PATTERER; ZUCOL A. F.; PASSEGGI E.

Publicación Electrónica de la Asociación Paleontológica Argentina

A.Paleontológica Arg.

Lugar: CABA; Año: 2017 vol. 17 p. 1 - 13

2469-0228

Palm forest retraction. the Butia yatay (Mart.) Becc. palm forest in the el Palmar national Park (Colón, entreríos) is part of a relict community developed over sandy soil, belonging to the entisols order of the old terraces of the uruguay river. thePuerto Yeruá soil series are gray sandy soils formed on terraces that have greater pedological development. the phytolith assemblages ofthis pedological sequence have been studied in order to contribute to the knowledge of the flora that accompanied the development of theseseries. the phytolith associations observed has reflected the change of two pedological cycles in which the analyzed profile is divided, withtwo zones demarcated by the presence of different paleocommunities: one is a palm forest associated with a poor herbaceous stratum, andan upper stratum of meso-megathermic grassland with scarce presence of remains with affinity to arboreal elements. the phytolith recorddescribed in this paper is the first record that shows the possible location of the change in the physiognomy of the landscape and the retractionof the Butia yatay palms in the study area.