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Orbital- and sub-orbital-scale climate impacts on vegetation of the western Mediterranean basin over the last 48,000 yr 5
Fletcher, William J.; Goni, Maria Fernanda Sanchez.
High-resolution pollen analysis of Alboran Sea Core MD95-2043 provides a 48-ka continuous vegetation record that can be directly correlated with sea surface and deep-water changes. The reliability of this record is supported by comparison with that of Padul (Sierra Nevada, Spain). Marine Isotope Stage (MIS) 3 was characterised by fluctuations in Quercus forest cover in response to Dansgaard-Oeschger climate variability. MIS 2 was characterised by the dominance of semi-desert vegetation. Despite overall dry and cold conditions during MIS 2, Heinrich events (HEs) 2 and 1 were distinguished from the last glacial maximum by more intensely and conditions. Taxon-specific vegetation responses to a tripartite climatic structure within the HEs are observed. In MIS...
Tipo: Text Palavras-chave: Marine palynology; Land-sea correlation; Iberian margin; Mediterranean region; Dansgaard-Oeschger variability; Heinrich events; LGM; Holocene; Precession.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00237/34783/33369.pdf
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Combining the Mg/Ca of the ostracod Cyprideis torosa with its ontogenic development for reconstructing a 28 kyr temperature record for Lake Banyoles (NE Spain) 5
Wansard, G.; De Deckker, P.; Julia, R..
Cyprideis torosa is a ubiquitous ostracod found in fresh to hypersaline waters, and commonly in large numbers across the Mediterranean region. Single valves of 51 adult specimens of C. torosa were separated from carapaces that were collected from Lake Banyoles in NE Spain at a depth of 5 m. The Mg/Ca of the valves was compared with known temperatures necessary for successive instar valve calcification, the latter being based on a four-year ecological study of C. torosa collected at Dievengat in northern Belgium by Carlo Heip in 1968-72. Hence, we were able to link the Mg/Ca of fossil valves of C. torosa recovered for a 28 kyr sequence at La Draga, cored on the fringe of Lake Banyoles, with the ontogenic observations of Heip, and reconstruct mean summer...
Tipo: Text Palavras-chave: Ostracod valve chemistry; Optimal growth; Moulting temperature; Late Quaternary; Last Glacial Maximum; Water temperature reconstructions; Land-sea correlation.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00421/53198/54987.pdf
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