Show simple item record Davies, Sarah Metcalfe, Sarah E. Aston, Benjamin John Byrne, Roger Champagne, Marie Jones, Matthew D. Leng, Melanie J. Noren, Anders 2018-11-15T19:33:07Z 2018-11-15T19:33:07Z 2018-12-15
dc.identifier.citation Davies , S , Metcalfe , S E , Aston , B J , Byrne , R , Champagne , M , Jones , M D , Leng , M J & Noren , A 2018 , ' A 6,000-year record of environmental change from the eastern Pacific margin of central Mexico ' Quaternary Science Reviews , vol. 202 , pp. 211-224 . en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 28369352
dc.identifier.other PURE UUID: d39e2656-f889-4438-8f95-5df6a7477c98
dc.identifier.other Scopus: 85057041099
dc.description.abstract The transition from the mid- to late-Holocene in MesoAmerica saw increasing complexity in spatial patterns of change. Records from the western part of the region are sparse, with lacustrine sequences affected by long term anthropogenic disturbance or lacking chronological resolution. Here, we present a continuous palaeoecological and geochemical record from Laguna de Juanacatlán, a remote lake in the mountains of the western TMVB. Diatom assemblages, XRF scanning data and bulk organic geochemistry from a well-dated, 7.25-m laminated sequence were combined with summary pollen data from a 9-m partially laminated core to provide a continuous record of catchment and lake ecosystem changes over the last c. 6,000 years. Relatively humid conditions prevailed prior to c. 5.1 cal ka, which supported dense oak-pine forest cover around a deep, stratified lake. A trend towards drier conditions began c. 5.1 cal ka, intensifying after 4.0 cal ka, consistent with weakening of the North American Monsoon. Between 3.0 and 1.2 cal ka, lower lake levels and variable catchment run-off are consistent with increasing ENSO influence observed in the Late Holocene in the neotropics. From 1.2 to 0.9 cal ka, a marked change to catchment stability and more intense stratification reflected drier conditions and / or reduced rainfall variability and possibly warmer temperatures. After 0.9 cal ka, conditions were wetter, with an increase in catchment disturbance associated with the combined effects of climate and human activity. In recent decades, the lake ecosystem has changed markedly, possibly in response to recent climate change as well as local catchment dynamics. en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews en
dc.rights en
dc.subject holocene en
dc.subject palaeolimnology en
dc.subject North America en
dc.subject diatoms en
dc.subject geochemistry en
dc.subject pollen en
dc.title A 6,000-year record of environmental change from the eastern Pacific margin of central Mexico en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.description.version authorsversion en
dc.contributor.institution Department of Geography and Earth Sciences en
dc.description.status Peer reviewed en 22-11-20

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