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Palynological Evidence for Increased Aridity on the Central Chilean Coast during the Holocene

Published online by Cambridge University Press:  20 January 2017

Carolina Villagrán  and
Juan Varela
Carolina Villagrán
Affiliation:
Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
Juan Varela
Affiliation:
Departamento de Geología y Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 13518, Correo 21, Santiago, Chile
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Abstract

The late Quaternary vegetation of the semiarid coast of central Chile is inferred from the palynological analysis of profiles from Quereo (31°55′S) and Quintero (32°47′S). Prior to 11,400 yr B.P., wet conditions are suggested by the abundance of pollen indicators of swamp and aquatic taxa, such as Cyperaceae and Myriophyllum, and by the presence of traces of arboreal pollen. Since ca. 10,000 yr B.P., a trend toward increasingly drier conditions is implied by the almost complete absence of arboreal and aquatic taxa, and a general decrease in the diversity of the semiarid shrubland indicators. From 3000 yr B.P. onward, the pollen records show the reappearance of swamp and aquatic taxa, presumably associated with wetter conditions, which led to recolonization by forest taxa at 1720 yr B.P. in Quintero. The drier climate detected along the semiarid coast of central Chile during most of the Holocene extended inland to the Andean foot-hills, within the present mediterranean-type climate zone of Chile, and also affected the distribution of the winter-deciduous Nothofagus forests and the northern boundary of the temperate rain forests.

Type
Articles
Information
Quaternary Research , Volume 34 , Issue 2 , September 1990 , pp. 198 - 207
Copyright
University of Washington

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References

Aceituno, P., (1988). On the functioning of the southern oscillation in the South American sector. Part I. Surface climate Monthly Weather Review 116 3 505–524 2.0.CO;2>CrossRefGoogle Scholar
Covacevich, V., (1971). Los moluscos pleistocénicos y holocénicos de San Vicente de Taguatagua Unpublished Geology Thesis Universidad de Chile Santiago Google Scholar
D'Antoni, H.L., (1983). Pollen analysis of Gruta del Indio Quaternary of South America and Antarctic Peninsula 1 83–104 Google Scholar
Di Castri, F. Hajek, E.R., (1976). Bioclimatologia de Chile Imprenta Editorial de la Universidad Católica de Chile Santiago, Chile Google Scholar
Fuenzalida, P.H., (1965). Clima Corfo, Geografía Económica de Chile Editorial Universitaria S.A Santiago, Chile 98–152 Google Scholar
Heusser, C.J., (1983). Quaternary pollen record from Laguna de Tagua Tagua, Chile Science 219 1429–1432 Google Scholar
Heusser, C.J., (1984). Late-Glacial-Holocene climate of the lake district of Chile Quaternary Research 22 77–90 CrossRefGoogle Scholar
Heusser, C.J. Rabassa, J. Brandani, A. Stuckenrath, R., (1988). Late-Holocene vegetation of the Andean Araucaria Region, province of Neuquén, Argentina Mountain Research and Development 8 53–63 CrossRefGoogle Scholar
Levi, U., (1951). Esquema ecológico del bosque de Quintero Investigaciones Zoológicas Chilenas 1 4–18 Google Scholar
Looser, G., (1944). Anotaciones fitosociológicas sobre la región de Quintero Revista Universitaria 29 27–33 Google Scholar
Markgraf, V., (1983). Late and postglacial vegetational and paleoclimatic changes in subantarctic, temperate, and arid environments in Argentina Palynology 7 43–70 Google Scholar
Markgraf, V., (1987). Paleoenvironmental changes at the northern limit of the subantarctic Nothofagus forest Quaternary Research 28 119–129 CrossRefGoogle Scholar
Nuñez, L. Varela, J. Casamiquela, R., (1983). Ocupación Paleoindio en Quereo: Reconstrucción Multidisciplinaria en el territorio semiárido de Chile Imprenta Universitaria, Universidad del Norte Antofagasta, Chile Google Scholar
Paskoff, R.P., (1970). Le Chili semi-aride Biscaye Freres, France Google Scholar
Paskoff, R.P., (1971). Edad radiométrica del mastodonte de Los Vilos Noticiario Mensual Museo Historia Natural 177 11 Google Scholar
Ramirez, C. Ferriere, F. Figueroa, H., (1983). Estudio fitosociológico de los Bosques pantanosos Templados del Sur de Chile Revista Chilena de Historia Natural 56 11–26 Google Scholar
Schmithüsen, J., (1956). Die raumliche Ordnung der chilenischen Vegetation Bonner Geographische Abhandlungen 17 1–86 Google Scholar
Sundt, L., (1903). Restos de un mastodonte encontrado cerca de Los Vilos Anales Universidad de Chile 113 555–560 Google Scholar
Varela, J., (1976). Geologia del Cuaternario de Laguna Taguatagua (Provincia de O'Higgins) Actas del Primer Congreso Geológico Chileno 81–113 Google Scholar
Varela, J., (1979). Geología del Cuaternario de la región de la Quebrada Quereo, Los Vilos, Prov. Choapa, IV region Actas del Segundo Congreso Geológico Chileno 3 141–159 Google Scholar
Varela, J., (1981). Geología del Cuaternario del área de Los Vilos-Ensenada El Negro (IV Región) y su relación con la existencia del bosque “relicto” de Quebrada Quereo Comunicaciones 33 17–30 Google Scholar
Villagrán, C., (1980). Vegetationsgeschichliche und pflanzensoziologische Untersuchungen im Vicente Pérez Rosales Nationalpark (Chile) Dissertationes Botanicae 54 1–165 Google Scholar
Villagrán, C., (1982). Estructura floristica e historia del bosque pantanoso de Quintero (Chile, 5. región) y su relación con las comunidades relictuales de Chile Central y Norte Chico Actas del Tercer Congreso Geológico Chileno 377–402 Google Scholar