A5036050188- Paleontology and Stratigraphy of Fossils
- Evolution and Paleontology Studies
- Morphological variations and asymmetry
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Pleistocene-Era Hominins and Archaeology
- Fish Biology and Ecology Studies
- Cephalopods and Marine Biology
- dental development and anomalies
- Marine and fisheries research
- Ichthyology and Marine Biology
- Marine and environmental studies
- Species Distribution and Climate Change
- Genetic diversity and population structure
- Coral and Marine Ecosystems Studies
- Geochemistry and Elemental Analysis
- Paleontology and Evolutionary Biology
- Gait Recognition and Analysis
- Historical Studies and Socio-cultural Analysis
- Marine and coastal plant biology
- Archaeology and ancient environmental studies
- Yersinia bacterium, plague, ectoparasites research
- Crustacean biology and ecology
- Death, Funerary Practices, and Mourning
Université de Bourgogne
2013-2024
Biogéosciences
2015-2024
Centre National de la Recherche Scientifique
2012-2023
Université Bourgogne Franche-Comté
2018-2021
École Pratique des Hautes Études
2020-2021
Université de Pau et des Pays de l'Adour
2015
Florida Museum of Natural History
2015
Museum für Naturkunde
2015
Stanford University
2015
GNS Science
2015
Research Article| March 01, 2011 Climatic ups and downs in a disturbed Jurassic world Guillaume Dera; Dera * 1LSCE-IPSL (Laboratoire des Sciences du Climat et de l'Environnement–Institut Pierre Simon Laplace), CNRS-UMR 8212, CEA, F-91191 Gif-sur-Yvette, France2Biogéosciences, 5561, Université Bourgogne, F-21000 Dijon, France *E-mail: guillaume.dera@lsce.ipsl.fr. Search for other works by this author on: GSW Google Scholar Benjamin Brigaud; Brigaud 2Biogéosciences, France3IDES (Interactions...
Abstract: The Pliensbachian–Toarcian interval was marked by major environmental disturbances and a second-order mass extinction. Here, we reappraise the taxonomic, spatiotemporal selective dynamics of extinctions over whole interval, analysing high-resolution dataset 772 ammonite species from NW Tethyan Arctic domains. On average, 40–65% disappeared during each subchronozone, but higher extinction pulses (reaching 70–90%) prevailed Margaritatus to Dispansum Chronozone. main extinctions,...
Summary The characteristics of dissolved organic matter ( DOM ) in soils are often determined through laboratory experiments. Many different protocols can be used to extract from soil. In this study, we five air‐dried compare three extraction methods for water‐extractable WEOM as follows: (i) pressurised hot‐water‐extractable carbon PH‐WEOC ), a percolation at high pressure and temperature; (ii) WEOC 1‐hour end‐over shaking; (iii) leaching‐extractable LEOC leaching soil columns ambient...
The study of mammalian evolution is often based on insights into the teeth. Developmental studies may attempt to address mechanisms that guide evolutionary changes. One example new developmental model proposed by Kavanagh et al. (2007), which provides a high-level testable predict tooth evolution. It constructed an inhibitory cascade dynamic balance activators and inhibitors, regulating differences in molar size along lower dental row. Nevertheless, sizes some mammals differ from this model,...
Developments of future scenarios Antarctic ecosystems are still in their infancy, whilst predictions the physical environment recognized as being global relevance and corresponding models under continuous development. However, context environmental change simulations biosphere increasingly demanded by decision makers public, fundamental scientific interest. This paper briefly reviews existing predictive applied to before providing a conceptual framework for further development spatially...
Abstract Phacopid trilobites are well documented during the Paleozoic. Nevertheless, while 2D quantitative analyses have advanced our understanding of morphological relationships among trilobites, quantification their traits in 3D remains rarely documented. Based on two sets data (head and tail), versus shape approaches were used to explore allometries as how variations can be explained by phylogenetic phacopid trilobite species for first time. We demonstrate that (1) there similar patterns...
Abstract. Since rodent fossils are preserved in many low and high latitude archaeological paleontological sites from a wide variety of environments, their associations commonly useful proxy for inferring past local climate environmental conditions. Such frequent widespread geographic distribution can help us to better understand evolution by providing access spatiotemporal resolution at large geographical scales. The aim this paper is develop an approach generate continental scale...
SUMMARY Knowledge of mammalian tooth formation is increasing, through numerous genetic and developmental studies. The prevalence teeth in fossil remains has led to an intensive description evolutionary patterns within among lineages based on morphology. extent which processes have influenced morphologies therefore the role these are nonetheless challenging. Recent methodological advances been proposed allowing inference from adult characterization degree integration/modularity morphological...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 463:215-230 (2012) - DOI: https://doi.org/10.3354/meps09842 Large-scale distribution analysis of Antarctic echinoids using ecological niche modelling Benjamin Pierrat1,*, Thomas Saucède1, Rémi Laffont1, Chantal De Ridder2, Alain Festeau1, Bruno David1 1Biogéosciences, UMR CNRS 6282, Université de Bourgogne,...
SUMMARY The evolution of mammalian dentition is constrained by functional necessity and the non‐independence morphological structures. Efficient chewing implies coherent tooth coordination from development to motion, involving covariation patterns (integration) within dental parts. Using geometric morphometrics, we investigate modular organization highly derived vole dentition. Integration between upper lower molar rows are analyzed identify potential modules their origins (functional...
Accurate species identification in fossil remains is a complex task but key component for developing good inferences on many, if not all, fundamental questions macroecology and macroevolution. In the Quaternary, arvicolines are very abundant archeological paleontological sites Western Europe their often based first lower molar. The common vole Microtus arvalis (Pallas, 1778) field agrestis (Linnaeus, 1761) commonly found those deposits. These two genetically ecologically divergent....
Sagittal otolith shape analysis is one of the most widespread techniques worldwide to discriminate fish stock units, as this proxy integrates both environmental and genetic factors. All previous studies have been carried out using two-dimensional (2D) images, a partial representation whole otolith. However, prior identification unit boundaries, influence other potential drivers controlling must be analysed limit their bias. In study, presence asymmetry in depending on inner ear side (i.e.,...
Evolutionary radiations are fascinating phenomena corresponding to a dramatic diversification of taxa and burst cladogenesis over short periods time. Most evolutionary have long been regarded as adaptive but this has seldom demonstrated with large-scale comparative datasets including fossil data. Originating in the Early Jurassic, irregular echinoids emblematic spectacular mobile marine faunas during Mesozoic Marine Revolution. They diversified they colonized various habitats, now constitute...
Abstract Aim To test for the phylogenetic conservatism of geographic range size and to explore effect environment on this potential conservatism. Location The western Tethys Ocean its surroundings (present‐day Europe, Middle East North Africa) during early Pliensbachian (Early Jurassic). Methods Using 104 localities 1,765 occurrences ammonite species, we estimated sizes using extent occurrence latitudinal range. was tested Moran's I index which measures autocorrelation, Pagel's λ indicates...
Abstract Tooth number in rodents is an example of reduction evolution. All have a toothless diastema lacking canine and most premolars present other mammals. Whereas some rodent lineages retained one premolar (p4), many others lost it during Recently, ‘inhibitory cascade’ developmental model ( IC ) has been used to predict how the first molar (m1) influences relative sizes following distal molars (m2 m3). The does not, however, consider presence premolars, here we examine whether could...
Conservation biologists and palaeontologists are increasingly investigating the phylogenetic distribution of extinctions its evolutionary consequences. However, dearth palaeontological studies on that subject lack methodological consensus hamper our understanding major phenomenon. Here we address this issue by (i) reviewing approaches used to quantify selectivity extinction risks; (ii) with a high-resolution dataset whether survivals were phylogenetically clustered among early Pliensbachian...
The Southern Ocean (SO) is among the regions on Earth that are undergoing regionally fastest environmental changes. unique ecological features of its marine life make it particularly vulnerable to multiple effects climate change. A network Marine Protected Areas (MPAs) has started be implemented in SO protect ecosystems. However, considering future predictions Intergovernmental Panel Climate Change (IPCC), relevance current, static, MPAs may questioned under scenarios. In this context,...
Abstract In biogeography, the similarity distance decay ( SDD ) relationship refers to decrease in compositional between communities with geographical distance. Although representing one of most widely used relationships a review literature reveals that: (1) is influenced by both spatial extent and sample size; (2) potential effect phylogenetic level has yet be tested; (3) marked biogeographical structuring upon patterns largely unknown; (4) usually explored modern, mainly terrestrial...
The Early Aptian encountered several crises in neritic and pelagic carbonate production, major perturbations the carbon cycle, an oceanic anoxic event (OAE1a). Yet causal links between these climate changes remain poorly understood, partly because temperature records spanning interval are still scant. We present new δ18O data from well-preserved bivalves a platform of Galve subbasin (Spain) that document cooling postdating most OAE1a. Our show postdates global demise cannot have triggered...