Description du projet
Une nouvelle analyse par capteur optique des microclimats d’herbiers côtiers
Des études scientifiques attestent de la sensibilité du milieu marin au changement climatique et aux interventions humaines. En particulier, les herbiers côtiers, qui se trouvent dans des eaux relativement peu profondes et fournissent des services précieux à une variété d’animaux marins, peuvent servir d’indicateurs de l’impact des changements environnementaux sur la mer. Les méthodes d’étude existantes reposent sur l’analyse d’un seul métal ou composé, un processus laborieux et fragmenté. Le projet SIPODET utilisera une technique de capteur optique pour l’analyse et l’imagerie simultanées de plusieurs produits chimiques dans les herbiers côtiers. Cette nouvelle technologie donnera une meilleure idée du microenvironnement chimique des herbiers de Zostera marina et de Zostera noltei et des changements apportés par les facteurs de stress à cet important système marin.
Objectif
Coastal seagrass ecosystems provide important services to nature and mankind in form of coastal protection, nursery grounds and carbon sequestration. However, seagrass meadows are affected by global climate change and anthropogenic stressors such as eutrophication and coastal development. Yet, the mechanistic interactions between these ecosystems and environmental change remain unclear due to the complexity of studying the seagrass habitat, which exhibit a multitude of chemical gradients and dynamics. The requirement for high-resolution measurement techniques for resolving the biogeochemical dynamics and microenvironments surrounding seagrasses in their natural habitat has led to the development of a variety of chemical techniques typically quantifying a single analyte at a time, which gives limited insight to the true dynamics of the seagrass-sediment interaction which is central for seagrass fitness and survival under environmental change. The SIPODET project will develop new multi-parameter chemical imaging techniques by combining luminescence-based optical sensor foils (planar optodes) with diffusional equilibrium in thin-film (DET) enabling simultaneous sensing of pO2, iron, phosphate, nitrite/nitrate, ammonium, manganese, pCO2 and pH. This project will encompass expert training of Dr. Cesbron in the use of planar optodes complementing his expertise in 2D DET mapping of chemical species, which will enable the development of a novel combined chemical imaging technology mentored by a world leader in microenvironmental analysis. The novel technology will investigate the dynamic chemical microenvironment in the seagrass rhizosphere and how this is modulated by environmental change and plant stress (e.g. effects of temperature, pH or eutrophication) in Zostera marina and Zostera noltei.
Champ scientifique
- natural sciencesbiological sciencesmarine biology
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensorsoptical sensors
- natural scienceschemical sciencesinorganic chemistrytransition metals
- natural sciencesbiological sciencesecologyecosystems
- natural sciencesearth and related environmental sciencesatmospheric sciencesclimatologyclimatic changes
Mots‑clés
Programme(s)
Régime de financement
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinateur
1165 Kobenhavn
Danemark