Multiproxy Record of Late Pleistocene–Holocene Climate and Vegetation Changes from a Peat Bog in Patagonia

Dados Bibliográficos

ID24087424
AutoresElise Pendall (0000-0002-1651-8969, Institute of Arctic and Alpine Research), Vera Markgraf (0000-0002-1349-8317, Institute of Arctic and Alpine Research), James W C White (0000-0001-6041-4684, Institute of Arctic and Alpine Research), Mark Dreier, Mark F Dreier (Institute of Arctic and Alpine Research), Ray Kenny (0000-0001-6086-7384, New Mexico Highlands University)
Ano2001
Volume55
Fascículo2
Páginas168-178
Data de publicação2001-03-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoQuaternary Research (JOURNAL)
Identificadores do periódicoISSN: 0033-5894 • E-ISSN: 1096-0287
EditoraCambridge University Press (CUP) (PUBLISHER)
DOI10.1006/qres.2000.2206
OpenAlexW1981078467
IdiomaEN
Citações recebidas21
Referências citadas36

Pollen assemblage changes and stable hydrogen isotope analysis of mosses ( Sphagnum magellanicum and Drepanocladus s.l.) from a bog in Tierra del Fuego, Argentina, provided independent proxies for reconstructing changes in effective moisture and temperature over the past 16,000 cal yr B.P. A deterministic model was used to reconstruct the stable hydrogen isotope composition of meteoric water from the D/H ratios of bog mosses over the last 16,000 years. Abrupt changes in temperature, as recorded in D/H ratios of moss cellulose, were accompanied by synchronous changes in vegetation composition during the late Pleistocene and early and middle Holocene, when moisture levels were lower than today. In contrast, temperature variability during the late Holocene was not accompanied by comparable vegetation changes. In particular, grass pollen (Poaceae) increased during periodic cold spells between 15,000 and 11,000 cal yr B.P., but a cold spell of similar magnitude ca. 2000 cal yr B.P. did not appear to affect vegetation. During the late Pleistocene, the isotopic record from the peat core shows variations similar to the D/H ratios in the Antarctic Taylor Dome ice core. However, the timing of the changes in the Harberton record is more in line with the timing of other Southern Hemisphere records.

Archaeology · Bog · Climate change · Geography · Holocene · Ice core · Paleoclimatology · Peat · Physical geography · Pleistocene · Pollen · Quaternary · Sphagnum · Testate amoebae · Vegetation (pathology) · Younger Dryas · Ecology · Geology · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Oceanography · Paleontology · Peatlands and Wetlands Ecology