Informations générales
Intitulé de l'offre : PhD thesis (funded) - Trait-based modeling of marine zooplankton feeding strategies at the global-scale (M/W) (H/F)
Référence : UMR7159-SAKAYA-003
Nombre de Postes : 1
Lieu de travail : PARIS
Date de publication : mardi 16 mai 2023
Type de contrat : CDD Doctorant/Contrat doctoral
Durée du contrat : 36 mois
Date de début de la thèse : 1 octobre 2023
Quotité de travail : Temps complet
Rémunération : 2 135,00 € gross monthly
Section(s) CN : Earth System: superficial envelopes
Description du sujet de thèse
Marine planktonic organisms represent an essential component of global biodiversity and play
critical roles in ecosystem functioning. This is particularly true for mesozooplankton, heterotrophic planktonic organisms ranging in size from 200 to 2000 μm. Although they have traditionally been studied via their taxonomy, functional trait approaches present real opportunities to better characterize the links between biodiversity and marine ecosystem functioning. Functional traits are the individual characteristics of an organism (e.g., size, reproductive strategy, thermal niches, etc.) that control its fitness as well as its impacts on ecosystem functioning. Over the past two decades, new in situ imaging technologies have emerged. They are promising methods to estimate functional traits of planktonic organisms at the individual scale. It is in this context that the thesis and more broadly the ANR TRAITZOO project is situated.
The main objective of the thesis will be to implement, in the biogeochemical model NEMO-PISCES, the representation of some functional traits. The predation mode is an essential trait of zooplankton, resulting from a trade-off between food acquisition, metabolic cost and predation risk. The implementation of this trait in NEMO-PISCES will be the priority of this thesis. The developed model will then be studied in global scale simulations, to compare the obtained predictions with those from statistical models, and to estimate the impact of taking into account the trophic strategies of mesozooplankton on carbon and nutrient fluxes. This thesis will thus provide valuable information for the understanding of the functioning of marine ecosystems and more broadly the role of mesozooplankton in the global ocean. Other traits can also be studied, such as the optimal temperature of growth
Contexte de travail
This project is part of the ANR project TRAITZOO led by SD Ayata (2023-2026) and will contribute to the development of the biogeochemical model NEMO-PISCES led by O Aumont.
Contraintes et risques
Modelling work, national and international collaborations.
Informations complémentaires
The detailed thesis topic and application procedures are available here: https://tinyurl.com/2cbzpmzm