Charlotte SIROT

http://www.criobe.pf/pro/wp-content/uploads/sites/3/2020/10/Charlott_Sirot_WEB-150x188.jpg

Post Doctorant
Centre National de la Recherche Scientifique (CNRS)

CRIOBE - Perpignan
USR3278 CRIOBE EPHE-CNRS-UPVD
Bâtiment R
58 Avenue Paul Alduy
66860 Perpignan
France

Email:

Domaines de Recherche:

  • Effects of environmental changes on marine ecosystems and trophic ecology
  • Climate change
  • Fishing activities impacts
  • Marine protected Areas
  • Life history traits
  • Otoliths
  • Elemental and isotopic (δ13C and δ15N) microchemistry

Sélection de Publications

  • Sirot C., Villéger S., Mouillot D., Darnaude A.M., Ramos-Miranda J., Flores-Hernandez D. and Panfili J. (2015) Combinations of biological attributes predict temporal dynamics of fish species in response to environmental changes. Ecological indicators, 48, 147-156. http://dx.doi.org/10.1016/j.ecolind.2014.07.038
  • Sirot C., Darnaude A.M., Guilhaumon F., Ramos-Miranda J., Flores-Hernandez D. and Panfili J. (2015) Linking temporal changes in the demographic structure and individual growth to the decline in the population of a tropical fish. Estuarine Coastal and Shelf Science 165, 165-175. http://dx.doi.org/10.1016/j.ecss.2015.05.012
  • Sirot C., Darnaude A.M & Panfili J. (2016) Biological traits for understanding the demographic responses of lagoon fishes to environmental pressures. Cybium. 40(3), 186.
  • Sirot C., Grønkjær P., Brøgger Pedersen J., Zetina-Rejon M., Tripp-Valdez A., Ramos-Miranda J., Flores-Hernandez D., Panfili J. & Darnaude A.M. (2017) Using otolith organic matter to detect diet shifts in Bardiella chrysoura, during a period of environmental changes. Marine Ecology Progress Series 575, 137-152. https://doi.org/10.3354/meps12166
  • Sirot C., Ferraton F., Childs A., Tournois J., Panfili J. Guilhaumon F. & Darnaude A.M. ElementR, a reactive interface for otolith microchemistry data preparation. Methods in Ecology and Evolution 8, 1659–1667. https://doi.org/10.1111/2041-210X.12822

Biographie

I am a marine ecologist, particularly interested to understand the impacts of environmental modifications (global change, human activities...) on marine ecosystems and food webs.

After completing a vet education, I graduated as a PhD in 2014 in MARBEC (Montpellier). During this work, I developed a new index to monitor mid-term demographic change of a fish community in the Terminos Lagoon (Mexico). I also demonstrate that species history traits (and their temporal modifications) are crucial indicators to predict these demographic change. I notably examined temporal changes in fish diet, their potential ecological meaning and consequences on populations.

As I became more and more interested in trophic ecology, I decided to join Peter Grønkjær lab (Aarhus, Denmark, http://pure.au.dk/portal/en/peter.groenkjaer@biology.au.dk) for a two years collaboration (Marie-Curie Scholarship). During this first postdoc, I studied the impacts of climate and fishing activities on marine food web structure and functioning. First, I compared theoretical vs. observed changes that fishing activities cause in food webs. I then validated some of these hypotheses with the biological model of the Faroese Cod (Gadus morhua). The models based on otolith isotopic data were able to show that fishing of (1) cod prey, (2) cod competitors and (3) cod itself affects cod trophic position.

I then wondered if available tools to protect marine biodiversity could also protect marine ecosystems from these trophic changes. This issue is the subject of the METRODIVER project (post-doc in collaboration with Joachim Claudet, 2020-2023, BIODIVERSA) which aims to determine whether marine protected areas are effective tools to restore marine food webs. This project will also investigate whether these restorations lead to better results in terms of ecosystem services. Working at the Mediterranean scale, METRODIVER will combine various concepts and methodologies (e.g. stable isotope of otoliths, metagenomics) to determine the effects of MPAs on trophic processes at different ecosystem levels, i.e. macro-organism community, population and gut microbiome. To answer this question, I am collaborating with the Marine and Freshwater Research Centre in GMIT (Irlande, https://www.gmit.ie/freshwater-and-marine-biology/marine-and-freshwater-research-centre-mfrc) and the center of Ecology of Aquatic Systems in ULB (Belgium, http://esa.ulb.ac.be/isabelle-george/).