Early Cretaceous Angiosperm Invasion of Western Europe and Major Environmental Changes
Identifieur interne : 000844 ( Main/Exploration ); précédent : 000843; suivant : 000845Early Cretaceous Angiosperm Invasion of Western Europe and Major Environmental Changes
Auteurs : C. Coiffard [France] ; B. Gomez [France] ; F. Thevenard [France]Source :
- Annals of Botany [ 0305-7364 ] ; 2007-09.
Abstract
Background and Aims At the beginning of the Late Cretaceous, angiosperms already inhabited all the environments and overtopped previously gymnosperm-dominated floras, especially in disturbed freshwater-related environments. The aim of this paper is to define what fossil plant ecology occurred during the early Cretaceous in order to follow the early spread of angiosperm taxa. Methods Floristic lists and localities from the Barremian to the Albian of Europe are analysed with the Wagner's Parsimony Method. Key results The Wagner's Parsimony Method indicates that (a) during the Barremian, matoniaceous ferns formed a savannah-like vegetation, while angiosperms composed freshwater aquatic vegetation; (b) during the Late Aptian humid phase, conifers increased, while matoniaceous ferns decreased, reflecting the closure of the vegetation; and (c) from the Albian, warmer and drier conditions induced the recovery of the matoniaceous ferns, while core angiosperms first developed in floodplains. Conclusions During the late Early Cretaceous (BarremianAlbian), angiosperms showed a stepwise widening of their ecological range, being recorded first during the Barremian as aquatic plant mega-remains and at the Cenomanian onwards occurred in all the environments.
Url:
- https://api.istex.fr/document/97AF08DB3918A6A53310B7257D0B3D2B57B0BEE8/fulltext/pdf
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2533611
DOI: 10.1093/aob/mcm160
Affiliations:
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Le document en format XML
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<front><div type="abstract">Background and Aims At the beginning of the Late Cretaceous, angiosperms already inhabited all the environments and overtopped previously gymnosperm-dominated floras, especially in disturbed freshwater-related environments. The aim of this paper is to define what fossil plant ecology occurred during the early Cretaceous in order to follow the early spread of angiosperm taxa. Methods Floristic lists and localities from the Barremian to the Albian of Europe are analysed with the Wagner's Parsimony Method. Key results The Wagner's Parsimony Method indicates that (a) during the Barremian, matoniaceous ferns formed a savannah-like vegetation, while angiosperms composed freshwater aquatic vegetation; (b) during the Late Aptian humid phase, conifers increased, while matoniaceous ferns decreased, reflecting the closure of the vegetation; and (c) from the Albian, warmer and drier conditions induced the recovery of the matoniaceous ferns, while core angiosperms first developed in floodplains. Conclusions During the late Early Cretaceous (BarremianAlbian), angiosperms showed a stepwise widening of their ecological range, being recorded first during the Barremian as aquatic plant mega-remains and at the Cenomanian onwards occurred in all the environments.</div>
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