Le δ13C des grains de pollen : intérêt pour l'étude des paléovégétations
| Autor: | Chantal Descolas-Gros, Michel Calleja, Paul Richard, Patrick Jame, Christiane Perruchietti, Pierre Cour |
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| Rok vydání: | 2001 |
| Předmět: |
0106 biological sciences
Palynology δ13C Ocean Engineering Vegetation 15. Life on land Herbaceous plant Biology medicine.disease_cause 010603 evolutionary biology 01 natural sciences Genus Pollen Botany medicine Temperate climate Poaceae Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science. 332:755-760 |
| ISSN: | 1251-8050 |
| DOI: | 10.1016/s1251-8050(01)01603-2 |
| Popis: | δ13C values of pollen grains belonging to different plant species (trees, herbaceous no poaceae, poaceae) were measured. Most of these temperate species are C3 plants with δ13C values between −28.6 ‰ and −21.7 ‰, the C4 plants have more positive values between −15.9 ‰ and −10 ‰. These results corroborate the interest of such measurements to differentiate C4 poaceae from C3 ones. Inside the same genus or the same species data variability is studied. Chemical treatment (acetolysis) of pollen grains induces a lowering of the values. These preliminary results are intended to help calibrate the pollen grains δ13C of modern plants in order to use δ13C of fossil pollen grains to reconstruct palaeovegetation variability responses to climatic factors. |
| Databáze: | OpenAIRE |
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