Descrizione del progetto
Evoluzione delle biomolecole animali fondamentali
Le biomolecole antiche forniscono informazioni sulle relazioni filogenetiche e sui processi di cambiamento evolutivo. Tuttavia, la ricerca è ancora fortemente concentrata sullo studio delle ossa e spesso non si spinge a esaminare l’impatto dei processi di fossilizzazione. Il progetto Palaeochem, finanziato dall’UE, caratterizzerà pellicole di carbonio sottili che conservano i tessuti molli degli animali fossili per studiare le biomolecole antiche. Il progetto sarà rivolto all’analisi chimica di diversi fossili, nell’ambito di un programma rigoroso di esperimenti di fossilizzazione che simula la decomposizione e la sepoltura. L’obiettivo è la realizzazione dei primi modelli esaustivi per la conservazione delle biomolecole cheratina, melanina e collagene nei tessuti molli fossili attraverso il Tempo profondo. Palaeochem analizzerà i reperti fossili di queste biomolecole, i meccanismi chimici responsabili della loro conservazione e terrà conto dei pregiudizi tafonomici nei modelli evolutivi.
Obiettivo
What are the limits of the fossil record? Ancient biomolecules are critically important given their potential to inform on phylogenetic relationships and the processes driving evolutionary change. Research to date, however, lacks cohesion and breadth, is strongly biased towards bone, and often fails to consider the impact of analytical bias and fossilization processes. This proposal sets a new, focussed agenda for the study of ancient biomolecules based on the characterization of thin carbon films preserving the soft tissues of fossil animals. Targeted chemical analysis of diverse fossils including frontier high-resolution mapping will be informed by a rigorous programme of fossilisation experiments simulating decay and burial, thus generating the first holistic models for the preservation of the evolutionarily important biomolecules keratin, melanin, and collagen in fossil soft tissues through deep time. The research will resolve the fossil record of these key biomolecules, the chemical mechanisms responsible for their preservation, and will accommodate taphonomic biases in evolutionary models. This enhanced picture of animal molecular evolution will test hypotheses linking biomolecular innovation with fundamental phenotypic, phylogenetic and ecological transitions, especially relating to the evolution of the tetrapod integument and the origins of animals. The research will launch twin experimental facilities for simulating burial that will allow extraction, and in-situ analysis, of reaction products in real time. These facilities will be unique in Europe, consolidating the PI’s team as a keystone global hub for research into ancient biomolecules. The research team comprises the PI, three postdoctoral researchers, and two PhD students, and will dovetail with a global collaborative network. The project will have significance for diverse scientists and will inspire the next generation to explore the wonders of science.
Campo scientifico
Programma(i)
Argomento(i)
Meccanismo di finanziamento
ERC-COG - Consolidator GrantIstituzione ospitante
T12 YN60 Cork
Irlanda