Margaux Mathieu-ResugeInstitut Français de Recherche pour l'Exploitation de la Mer | Ifremer
Margaux Mathieu-Resuge
PhD in Marine Ecology
About
21
Publications
4,297
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64
Citations
Introduction
Skills and Expertise
Additional affiliations
March 2019 - May 2020
Position
- PostDoc Position
Description
- AQUATERR: Aquatic-terrestrial linkages – export of polyunsaturated fatty acids from aquatic ecosystems via emerging insects
October 2015 - October 2018
Position
- PhD Student
Description
- Trophic ecophysiology of two bivalve species (N. subnodosus and S. crassisquama) under environmental variabilities in a coastal lagoon (Ojo de Liebre, BCS, Mexico). Under the supervision of Edouard Kraffe, Fabienne Le Grand, and Gauthier Schaal.
Education
September 2013 - June 2015
September 2012 - June 2013
September 2010 - June 2012
Publications
Publications (21)
Climate change can decouple resource supply from consumer demand, with the potential to create phenological mismatches driving negative consequences on fitness. However, the underlying ecological mechanisms of phenological mismatches between consumers and their resources have not been fully explored. Here, we use long-term records of aquatic and te...
Organisms at the base of aquatic food webs synthesize essential nutrients, such as omega‐3 polyunsaturated fatty acids (n‐3 PUFA), which are transferred to consumers at higher trophic levels. Many consumers, requiring n‐3 long‐chain (LC) PUFA, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), have limited ability to biosynthesize...
Consumers feeding at the aquatic–terrestrial ecosystem interface may obtain a mixture of aquatic and terrestrial diet resources that vary in nutritional composition. However, in lake riparian spiders, the relative significance of aquatic versus terrestrial diet sources remains to be explored. We investigated the trophic transfer of lipids and polyu...
• The ecological role of emergent aquatic insects from lakes in exporting dietary polyunsaturated fatty acids (PUFA) across the freshwater-land interface is still poorly understood.
• In this field study, we explored the seasonal biomass export of emergent insects from three subalpine lakes and investigated how lipids of emergent insects were relat...
Across ecosystems, resources vary in their nutritional composition and thus their dietary value to consumers. Animals can either access organic compounds, such as fatty acids, directly from diet or through internal biosynthesis, and the extent to which they use these two alternatives likely varies based on the availability of such compounds across...
Within the EUROPONDS project we looked into the contribution of aquatic invertebrates to terrestrial ecosystems, which are globally declining, in various countries all over Europe. Our study encompassed a restored quarry in Alpedrete, Madrid, Spain, a landscape destined for livestock activities. We hypothesized that the emergence during autumn and...
Carbon isotopic fractionation was studied during the development of the diatom Chaetoceros muelleri grown in batch culture with ¹³C-depleted CO2 addition. Cellular and growth parameters and isotopic composition of dissolved inorganic carbon and particulate organic carbon were monitored every two days, while the content and isotopic composition of i...
This poster was a contribution by Juan Rubio-Ríos and Encarnación Fenoy from EUROPONDS project to the online Symposium about "Researches in Experimental Sciences" ("IX Simposio de Investigación en Ciencias Experimentales") from University of Almería in Spain.
An important, but underappreciated, consequence of climate change is the reduction in crucial nutrient production at the base of the marine food chain: the long-chain omega-3 highly unsaturated fatty acids (n-3 HUFA). This can have dramatic consequences on consumers, such as fish as they have limited capacity to synthesise n-3 HUFA de novo. The n-3...
Bivalves' physiological functions (i.e. growth, reproduction) are influenced by environmental variability that can be concomi-tant with trophic resource variations in terms of quality and quantity. Among the essential molecules that bivalves need to acquire from their diet to maintain physiological functions, fatty acids (FAs) such as polyunsaturat...
Determining the lipid content and fatty acid (FA) composition of aquatic organisms has been of major interest in trophic ecology, aquaculture, and nutrition for over half a century. Although protocols for lipid analysis are well-described, their application to aquatic sciences often requires modifications to adapt to field conditions and to sample...
Deposit-feeding sea cucumbers are efficient nutrient recyclers and have the potential to contribute to the limitation of organic matter load in polyculture or integrated aquaculture systems. Assessing how they assimilate organic matter originating from other farmed species is therefore important for the development of such multi-species farming sys...
Emerging aquatic insects (EAI) are important vectors through which freshwater-derived organic matter can enter terrestrial food webs. Aquatic-derived dietary energy can support terrestrial consumer fitness, especially via its polyunsaturated fatty acids (PUFA) that are otherwise short in supply from terrestrial diet. Considering qualitative aspects...
The trophic fate of various food sources is of central interest for ecologists, yet not well understood in coastal lagoon food webs. In this field study, fatty acids (FA), stable isotopes (SI), and compound-specific isotopic analysis (CSIA) on FA were used to investigate how diets from oceanic and local sources are retained in a bivalve species (Sp...
Poster highlighting my PhD objective and first results.
Presented in 2019 at the University of North Carolina Wilmington (UNCW) in the Center for Marine Sciences (CMS) for the Graduate Student Day.
Final results for the C. neogracile and A. minutum experiments have been published in Biomolecules in 2020.
Understanding the nature and origins of food sources supporting coastal lagoon-inhabiting organisms is necessary to evaluate the ecological status of such ecosystems. The trophic ecology of a bivalve species Spondylus crassisquama was studied in the Ojo de Liebre lagoon (Baja California, Mexico), combining stable isotope (SI), fatty acid (FA) and s...
Les lagunes côtières sont des écosystèmes semi-fermés à l'interface de la terre et des océans et sous l'influence de ces deux compartiments. De par ces caractéristiques, elles sont soumises à de fortes variations spatiales et saisonnières de leurs ressources trophiques. De par leur nature fermée et peu profonde, elles vont amplifier la force des pr...
Notre étude a permis d’établir un modèle conceptuel des principaux paramètres régissant l’aquaculture d’holothuries en bassin et en milieu côtier. Ce modèle doit maintenant être testé et validé grâce à de nouvelles expérimentations afin de mettre en place des protocoles d’élevages performants qui sont nécessaires pour mener cette filière naissante...
Projects
Projects (5)
The 12th International Conference on the Applications of Stable Isotope Techniques to Ecological Studies will be held from June 6-10, 2022!
EUROPONDS was selected as the 3rd fresh project, a joint call of the European Federation of Freshwater Sciences (EFFS) board and the EFFS Societies as well as the European Fresh and Young Researchers (EFYR) and representatives of the Fresh Blood for Fresh Water (FBFW).
To evaluate the often overlooked ecological contributions and ecosystem services provided by ponds across Europe, we will investigate the taxonomy and biomass (‘biodiversity’) and the energy content and dietary quality, as measured by total lipids and their fatty acids (‘nutritional value for subsequent consumers’) of emerging insects from ponds across Europe.
Funding for this project is provided by the EFFS-federated societies.
The flow of energy and nutrients across ecosystem boundaries can crucially influence the productivity of adjacent habitats. Emerging aquatic insects represent an important pathway that freshwater-derived organic matter can enter terrestrial food webs. Emerging insects significantly contribute to the diets of riparian predators, such as birds, bats, and predatory beetles. Unlike terrestrial insects, they contain considerable amounts of long-chain polyunsaturated fatty acids (LC-PUFA), which are known to crucially influence animal physiology. The overall objective of this project is to quantify the emergence of aquatic insects and their subsequently transfer of potentially-limiting biochemical nutrients, i.e., LC-PUFA, from freshwater lakes to their surrounding terrestrial ecosystems.
