Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/16035
Title: Climate change patterns in Amazonia and biodiversity
Authors: Cheng, Hai J.
Sinha, Ashish
Cruz, Francisco W.
Wang, Xianfeng
Edwards, R.
D'Horta, Fernando Mendonça
Ribas, Camila Cherem
Vuille, M.
Stott, Lowell D.
Auler, Augusto Sarreiro
Keywords: Oxygen
Biodiversity
Climate Change
Climate Conditions
Fragmentation
Glacial-interglacial Cycle
Last Glacial
Nature-society Relations
Oxygen Isotope
Precipitation (climatology)
Speleothem
Time-scale
Biodiversity
Climate
Climate Change
Forest
Glacial Period
Hypothesis
Precipitation
South America
Cave
El Nino
Geography
Time
Amazonia
Biodiversity
Caves
Climate Change
El Nino-southern Oscillation
Geography
Oxygen Isotopes
South America
Time Factors
Issue Date: 2013
metadata.dc.publisher.journal: Nature Communications
metadata.dc.relation.ispartof: Volume 4
Abstract: Precise characterization of hydroclimate variability in Amazonia on various timescales is critical to understanding the link between climate change and biodiversity. Here we present absolute-dated speleothem oxygen isotope records that characterize hydroclimate variation in western and eastern Amazonia over the past 250 and 20 ka, respectively. Although our records demonstrate the coherent millennial-scale precipitation variability across tropical-subtropical South America, the orbital-scale precipitation variability between western and eastern Amazonia exhibits a quasi-dipole pattern. During the last glacial period, our records imply a modest increase in precipitation amount in western Amazonia but a significant drying in eastern Amazonia, suggesting that higher biodiversity in western Amazonia, contrary to 'Refugia Hypothesis', is maintained under relatively stable climatic conditions. In contrast, the glacial-interglacial climatic perturbations might have been instances of loss rather than gain in biodiversity in eastern Amazonia, where forests may have been more susceptible to fragmentation in response to larger swings in hydroclimate. © 2013 Macmillan Publishers Limited. All rights reserved.
metadata.dc.identifier.doi: 10.1038/ncomms2415
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