Integrative analysis of extant and fossil data, morphological and molecular, to study the ecological and biogeographical evolution of the genus Arbacia Gray, 1835 (Echinoidea) during the Cenozoic

Started in october 2021

Funding: doctoral grant

Supervisors: Thomas Saucède (uB) and Elie Poulin (Chili university)

Abstract

Species biogeographic patterns are determined by a set of ecological and historical factors that interact with each other at multiple time and spatial scales. Long treated separately, these factors are now analyzed jointly in combined biogeographic studies that integrate phylogenetic, geographic and ecological data, in particular by combining ecological niche modeling and methods of historical biogeography to better understand species distribution and identify their main determining factors. However, this requires robust phylogenies that integrate morphological, molecular, extant and fossil data. The PhD project will be focussed on the echinoid genus Arbacia Gray, 1835, which counts around twenty extant and fossil species with contrasting distribution patterns off North and South America, in the Mediterranean Sea, along West African coasts, and off Atlantic Islands. The main objective is to test and stress the respective roles of main ecological and historical factors in the biogeographic history of the genus Arbacia. The PhD will be structured around three research lines: (1) constructing a molecular and morphological phylogeny integrating both extant and fossil species, (2) testing different biogeographic scenarios based on the established phylogeny and geological data to determine the impact of environmental, palaeo-oceanographic and palaeogeographic changes on the evolution of the genus, and (3) modeling ecological niches to characterize the importance of ecological conservatism with regards to phylogenetic structure of the genus. PhD works will be carried out in cosupervision between the University of Bourgogne Franche-Comté and the University of Chile in Santiago. Mainly based at the Biogeosciences laboratory, the PhD will include research stays in Santiago for molecular works and access to study specimens

Keywords

biogeography, marine ecology, modelling, pPaleontology, Echinoidea, Cenozoïc

Thesis advisory panel

Gilles Escarguel (université de Lyon Paul Bernard)
Rémi Wattier (uB)

extrait:

lien_externe:

titre:

Analyse intégrée de données fossiles et actuelles, morphologiques et moléculaires pour comprendre l'évolution écologique et biogéographique du genre Arbacia Gray, 1835 (Echinoidea) au cours du Cénozoïque

date_de_debut_these:

octobre 2021

nom:

Courville

date_de_debut_these_numerique:

202110

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kc_raw_content:

Integrative analysis of extant and fossil data, morphological and molecular, to study the ecological and biogeographical evolution of the genus Arbacia Gray, 1835 (Echinoidea) during the Cenozoic

Started in october 2021

Funding: doctoral grant

Supervisors: Thomas Saucède (uB) and Elie Poulin (Chili university)

 

Abstract

Species biogeographic patterns are determined by a set of ecological and historical factors that interact with each other at multiple time and spatial scales. Long treated separately, these factors are now analyzed jointly in combined biogeographic studies that integrate phylogenetic, geographic and ecological data, in particular by combining ecological niche modeling and methods of historical biogeography to better understand species distribution and identify their main determining factors. However, this requires robust phylogenies that integrate morphological, molecular, extant and fossil data. The PhD project will be focussed on the echinoid genus Arbacia Gray, 1835, which counts around twenty extant and fossil species with contrasting distribution patterns off North and South America, in the Mediterranean Sea, along West African coasts, and off Atlantic Islands. The main objective is to test and stress the respective roles of main ecological and historical factors in the biogeographic history of the genus Arbacia. The PhD will be structured around three research lines: (1) constructing a molecular and morphological phylogeny integrating both extant and fossil species, (2) testing different biogeographic scenarios based on the established phylogeny and geological data to determine the impact of environmental, palaeo-oceanographic and palaeogeographic changes on the evolution of the genus, and (3) modeling ecological niches to characterize the importance of ecological conservatism with regards to phylogenetic structure of the genus. PhD works will be carried out in cosupervision between the University of Bourgogne Franche-Comté and the University of Chile in Santiago. Mainly based at the Biogeosciences laboratory, the PhD will include research stays in Santiago for molecular works and access to study specimens

 

Keywords

biogeography, marine ecology, modelling, pPaleontology, Echinoidea, Cenozoïc

 

Thesis advisory panel

Gilles Escarguel (université de Lyon Paul Bernard)
Rémi Wattier (uB)