Skip to main content
×
×
Home

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

  • Carolina Villagrán (a1) and Juan Varela (a2)
Abstract
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.

Copyright
References
Hide All
Aceituno P., (1988). On the functioning of the southern oscillation in the South American sector. Part I. Surface climate Monthly Weather Review 116 3 505524
Covacevich V., (1971). Los moluscos pleistocénicos y holocénicos de San Vicente de Taguatagua Unpublished Geology Thesis Universidad de Chile Santiago
D'Antoni H.L., (1983). Pollen analysis of Gruta del Indio Quaternary of South America and Antarctic Peninsula 1 83104
Di Castri F. Hajek E.R., (1976). Bioclimatologia de Chile Imprenta Editorial de la Universidad Católica de Chile Santiago, Chile
Fuenzalida P.H., (1965). Clima Corfo Geografía Económica de Chile Editorial Universitaria S.A Santiago, Chile 98152
Heusser C.J., (1983). Quaternary pollen record from Laguna de Tagua Tagua, Chile Science 219 14291432
Heusser C.J., (1984). Late-Glacial-Holocene climate of the lake district of Chile Quaternary Research 22 7790
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 5363
Levi U., (1951). Esquema ecológico del bosque de Quintero Investigaciones Zoológicas Chilenas 1 418
Looser G., (1944). Anotaciones fitosociológicas sobre la región de Quintero Revista Universitaria 29 2733
Markgraf V., (1983). Late and postglacial vegetational and paleoclimatic changes in subantarctic, temperate, and arid environments in Argentina Palynology 7 4370
Markgraf V., (1987). Paleoenvironmental changes at the northern limit of the subantarctic Nothofagus forest Quaternary Research 28 119129
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
Paskoff R.P., (1970). Le Chili semi-aride Biscaye Freres, France
Paskoff R.P., (1971). Edad radiométrica del mastodonte de Los Vilos Noticiario Mensual Museo Historia Natural 177 11
Ramirez C. Ferriere F. Figueroa H., (1983). Estudio fitosociológico de los Bosques pantanosos Templados del Sur de Chile Revista Chilena de Historia Natural 56 1126
Schmithüsen J., (1956). Die raumliche Ordnung der chilenischen Vegetation Bonner Geographische Abhandlungen 17 186
Sundt L., (1903). Restos de un mastodonte encontrado cerca de Los Vilos Anales Universidad de Chile 113 555560
Varela J., (1976). Geologia del Cuaternario de Laguna Taguatagua (Provincia de O'Higgins) Actas del Primer Congreso Geológico Chileno 81113
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 141159
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 1730
Villagrán C., (1980). Vegetationsgeschichliche und pflanzensoziologische Untersuchungen im Vicente Pérez Rosales Nationalpark (Chile) Dissertationes Botanicae 54 1165
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 377402
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
  • URL: /core/journals/quaternary-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Abstract views

Total abstract views: 77 *
Loading metrics...

* Views captured on Cambridge Core between 20th January 2017 - 15th December 2017. This data will be updated every 24 hours.