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Your search keyword '"Francke, Alexander"' showing total 23 results
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23 results on '"Francke, Alexander"'

2. Holocene climate and catchment change inferred from the geochemistry of Lashmars Lagoon, Kangaroo Island (Karti/Karta), southern Australia

Author

Duxbury, Lucinda Cameron, primary, Johns-Mead, Lluka Yohanni, additional, Cadd, Haidee, additional, Francke, Alexander, additional, Löhr, Stefan C., additional, Law, Wallace Boone, additional, Armbrecht, Linda, additional, Hall, Philip Anthony, additional, Zawadzki, Atun, additional, Jacobsen, Geraldine E., additional, Gadd, Patricia S., additional, Child, David P., additional, Maxson, Charles, additional, Thomas, Zoë Amber, additional, and Tyler, Jonathan James, additional

Published
2023
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3. Catchment vegetation and erosion controlled soil carbon cycling in south-eastern Australia during the last two glacial-interglacial cycles

Author

Francke, Alexander, primary, Dosseto, Anthony, additional, Forbes, Matthew, additional, Cadd, Haidee, additional, Short, Julia, additional, Sherborne-Higgins, Bryce, additional, Constantine, Mark, additional, Tyler, Jon, additional, Tibby, John, additional, Marx, Samuel K., additional, Dodson, John, additional, Mooney, Scott, additional, and Cohen, Timothy J., additional

Published
2022
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5. Drivers of phytoplankton community structure change with ecosystem ontogeny during the Quaternary

Author

Cvetkoska, Aleksandra, primary, Jovanovska, Elena, additional, Hauffe, Torsten, additional, Donders, Timme H., additional, Levkov, Zlatko, additional, Van de Waal, Dedmer B., additional, Reed, Jane M., additional, Francke, Alexander, additional, Vogel, Hendrik, additional, Wilke, Thomas, additional, Wagner, Bernd, additional, and Wagner-Cremer, Friederike, additional

Published
2021
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6. Geochemical methods to infer landscape response to Quaternary climate change and land use in depositional archives: A review

Author

Francke, Alexander, Holtvoeth, Jens, Codilean, Alexandru, Lacey, Jack H., Bayon, Germain, Dosseto, Anthony, Francke, Alexander, Holtvoeth, Jens, Codilean, Alexandru, Lacey, Jack H., Bayon, Germain, and Dosseto, Anthony

Abstract

Understanding and quantifying the processes and geochemical cycles associated with catchment erosion, the development of soils and weathering horizons, and terrestrial habitat change beyond the scales of modern observations remain challenging. Such research, however, has become increasingly important to help predict future landscape change in light of increasing land use and rapid global warming. We herein review organic and inorganic geochemical tools applied to depositional archives to better understand various aspects of landscape evolution on geological time scales. We highlight the potentials and limitations of inorganic geochemical analytical methods, such as major element geochemistry, metal and radiogenic isotopes, and in-situ cosmogenic nuclides, as qualitative, semi-quantitative, and quantitative proxies for the transformation of bedrock material via regolith and soils to sediments. We also show how stable isotope geochemistry applied to lacustrine endogenic carbonates can be used to infer rock-water interactions, vegetation change, and soil development in limestone-rich catchments. Proxies focusing on the silicilastic element of sediment formation, transport and deposition are also ideally combined with organic geochemical proxies for vegetation change and soil organic matter evolution in a catchment to gain a comprehensive picture of the Critical Zone’s evolution over time. Multi-proxy and multidisciplinary research combining organic and inorganic geochemical techniques from several sedimentary archives in the same catchment have high potential to provide comprehensive information on Quaternary landscape evolution and thus improve the robustness of associated forecasting models.

Published
2020
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7. Comparing interglacials in eastern Australia: A multi-proxy investigation of a new sedimentary record

Author

Forbes, Matt, primary, Cohen, Tim, additional, Jacobs, Zenobia, additional, Marx, Sam, additional, Barber, Emily, additional, Dodson, John, additional, Zamora, Andrés, additional, Cadd, Haidee, additional, Francke, Alexander, additional, Constantine, Mark, additional, Mooney, Scott, additional, Short, Julia, additional, Tibby, John, additional, Parker, Adrian, additional, Cendón, Dioni, additional, Peterson, Mark, additional, Tyler, Jon, additional, Swallow, Elizabeth, additional, Haines, Heather, additional, Gadd, Patricia, additional, and Woodward, Craig, additional

Published
2021
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10. Insights into the evolution of the young Lake Ohrid ecosystem and vegetation succession from a southern European refugium during the Early Pleistocene

Author

Panagiotopoulos, Konstantinos, primary, Holtvoeth, Jens, additional, Kouli, Katerina, additional, Marinova, Elena, additional, Francke, Alexander, additional, Cvetkoska, Aleksandra, additional, Jovanovska, Elena, additional, Lacey, Jack H., additional, Lyons, Emma T., additional, Buckel, Connie, additional, Bertini, Adele, additional, Donders, Timme, additional, Just, Janna, additional, Leicher, Niklas, additional, Leng, Melanie J., additional, Melles, Martin, additional, Pancost, Richard D., additional, Sadori, Laura, additional, Tauber, Paul, additional, Vogel, Hendrik, additional, Wagner, Bernd, additional, and Wilke, Thomas, additional

Published
2020
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13. Evidence for carbon cycling in a large freshwater lake in the Balkans over the last 0.5 million years using the isotopic composition of bulk organic matter

Author

Zanchetta, Giovanni, primary, Baneschi, Ilaria, additional, Francke, Alexander, additional, Boschi, Chiara, additional, Regattieri, Eleonora, additional, Wagner, Bernd, additional, Lacey, Jack H., additional, Leng, Melanie J., additional, Vogel, Hendrik, additional, and Sadori, Laura, additional

Published
2018
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19. A Last Interglacial record of environmental changes from the Sulmona Basin (central Italy)

Author

Regattieri, Eleonora, primary, Giaccio, Biagio, additional, Nomade, Sebastien, additional, Francke, Alexander, additional, Vogel, Hendrik, additional, Drysdale, Russell N., additional, Perchiazzi, Natale, additional, Wagner, Bernd, additional, Gemelli, Maurizio, additional, Mazzini, Ilaria, additional, Boschi, Chiara, additional, Galli, Paolo, additional, and Peronace, Edoardo, additional

Published
2017
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20. WITHDRAWN: A Last Interglacial record of environmental changes from the Sulmona Basin (central Italy)

Author

Regattieri, Eleonora, primary, Giaccio, Biagio, additional, Nomade, Sebastien, additional, Francke, Alexander, additional, Vogel, Hendrik, additional, Drysdale, Russell N., additional, Perchiazzi, Natale, additional, Wagner, Bernd, additional, Gemelli, Maurizio, additional, Mazzini, Ilaria, additional, Boschi, Chiara, additional, Galli, Paolo, additional, and Peronace, Edoardo, additional

Published
2017
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21. Scientific drilling projects in ancient lakes: Integrating geological and biological histories

Author

Wilke, Thomas, primary, Wagner, Bernd, additional, Van Bocxlaer, Bert, additional, Albrecht, Christian, additional, Ariztegui, Daniel, additional, Delicado, Diana, additional, Francke, Alexander, additional, Harzhauser, Mathias, additional, Hauffe, Torsten, additional, Holtvoeth, Jens, additional, Just, Janna, additional, Leng, Melanie J., additional, Levkov, Zlatko, additional, Penkman, Kirsty, additional, Sadori, Laura, additional, Skinner, Alister, additional, Stelbrink, Björn, additional, Vogel, Hendrik, additional, Wesselingh, Frank, additional, and Wonik, Thomas, additional

Published
2016
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23. Arid and humid phases in central Italy during the Late Pleistocene revealed by the Lake Trasimeno ostracod record

Author

Daniel Ariztegui, Alexander Francke, Marta Marchegiano, Elsa Gliozzi, Analytical, Environmental & Geo-Chemistry, Chemistry, Marchegiano, Marta, Francke, Alexander, Gliozzi, Elsa, and Ariztegui, Daniel

Subjects
010506 paleontology, Paleoclimate, 010504 meteorology & atmospheric sciences, Pleistocene, Oceanography, Mediterranean area, 01 natural sciences, Paleocology, Ostracod, Paleoclimatology, Ecology, Evolution, Behavior and Systematics, Holocene, 0105 earth and related environmental sciences, Earth-Surface Processes, Temperature record, Multivariate analyse, biology, Paleontology, biology.organism_classification, Ecology, Evolution, Behavior and Systematic, Arid, Paleoenvironment, Salinity, Earth-Surface Processe, Period (geology), Geology
Abstract

A multiproxy approach in a sediment core from Lake Trasimeno has been used to reconstruct the climate history of central Italy during the Late Pleistocene to Early Holocene period (ca. 47,000–9,000 cal yr B.P.). Ostracod assemblages and sedimentological data (lithology and carbonate content) have been used to infer past hydrological changes in the area. Ostracods were analyzed throughout the core using diversity indexes and multivariate statistic analyses (Cluster and PCA). Three main associations linked to lake level and salinity variations were recognized: 1) the C. torosa association, indicating permanent lacustrine conditions with high lake levels and low salinities; 2) the S. aculeata association, linked to very shallow/temporary waters with higher salinity conditions; and 3) the S. aculeata-E. mareotica association pointing to temporary water conditions and the highest salinities. Furthermore, the presence of C. fuscata and L. blankenbergensis during wide parts of the Late Pleistocene indicates temperatures lower than present days. Alternations of these three ostracod associations compares well with the oxygen isotope curve from Greenland (NGRIP) and are thus interpreted as climatically driven. At the Holocene transition (Termination 1), the ostracod associations indicate a delay in the increasing warming and humidity with respect to the NGRIP temperature record.

Published
2018

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