The dynamics of vegetation and chironomid assemblages during the Late Quaternary at Laguna Facil, Chonos Archipelago, southern Chile

MASSAFERRO,J, BROOKS, S. & S. HABERLE

QUATERNARY SCIENCE REVIEWS

Elsevier

Año: 2005 p. 2510 - 2522

0277-3791

Abstract We compare high-resolution pollen and chironomid records from the last 15,000 yr in Laguna Facil, southern Chile. Major vegetation and chironomid changes are recorded between ca 14,900 and 14,700 cal. yr BP. During the Lateglacial, changes in the chironomid stratigraphy lag behind changes in the pollen stratigraphy suggesting that the chironomids are responding to changes in the tree canopy or in soil chemistry brought about by vegetational development. At about 7200 cal. yr BP there is a change in the chironomid stratigraphy in advance of changes in the vegetation. This suggests that the response is to regional climatic change. The relatively close correlation of the chironomid and pollen stratigraphies with changes in charcoal concentrations also implicates the importance of .re and/or vulcanism in in.uencing the dynamics of forest and limnological systems. There is no clear evidence of cooling during the Younger Dryas chronozone in Laguna Facil.  2005 Elsevier Ltd. All rights reserved.2005 Elsevier Ltd. All rights reserved. 2005 Elsevier Ltd. All rights reserved.