Dinocysts as proxies of sea-ice cover in Arctic and subarctic environments
Published:January 01, 2013
A. De Vernal, A. Rochon, T. Radi, M. Henry, 2013. "Dinocysts as proxies of sea-ice cover in Arctic and subarctic environments", Biological and Geological Perspectives of Dinoflagellates, J. M. Lewis, F. Marret, L. R. Bradley
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Dinoﬂagellate cysts occur in a wide range of environmental conditions, including polar areas. In Arctic and subarctic seas characterized by dense sea-ice cover (>6 months/year), Islandinium minutum, Islandinium? cezare, Echinidinium karaense, Polykrikos sp. var. arctic, Spiniferites elongatus-frigidus and Impaginium pallidum are common. They can occur with more cosmopolitan taxa such as Operculodinium centrocarpum sensu Wall & Dale, Pentapharsodinium dalei and Brigantedinium spp. Canonical correspondence analyses of assemblages illustrate relationships with sea-surface parameters such as salinity, temperature and sea-ice cover. The application of the modern analogue technique to dinocyst assemblages permits reconstruction of past seasonal extent of sea-ice cover (months/year with more than 50% of concentration) with an accuracy of about ±1.25 months/year.
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Biological and Geological Perspectives of Dinoflagellates
This volume provides an overview of current research on fossil and modern dinoflagellates, as well as highlighting research areas for future collaboration, following the DINO9 International Conference in Liverpool. The volume is organized into four themes, with a review paper for each theme written by the key-note speaker. Each theme also includes a future research foci note following discussion during the conference. The contributions are organized into the following sections: environmental change, ecology/palaeoecology, life cycles and diversity, and stratigraphy and evolution. Also included are notes from two workshops: culture experiments and dinocysts as palaeoceanographic tracers. This volume will be of interest to both the biological and Micropalaeontological communities.