Marion Guéganton

ORCID: 0009-0000-9624-9916
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About
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Research Areas
  • Crustacean biology and ecology
  • Parasite Biology and Host Interactions
  • Insect symbiosis and bacterial influences
  • Coral and Marine Ecosystems Studies
  • Marine Biology and Ecology Research
  • Insect Utilization and Effects
  • Invertebrate Immune Response Mechanisms
  • Marine and fisheries research
  • Plant and animal studies
  • Marine and coastal plant biology
  • Microbial Community Ecology and Physiology

Université de Bretagne Occidentale
2022-2024

Ifremer
2022-2024

Centre National de la Recherche Scientifique
2022-2024

At deep-sea hydrothermal vents, deprived of light, most living communities are fueled by chemosynthetic microorganisms. These can form symbiotic associations with metazoan hosts, which then called holobionts. Among these, two endemic co-occurring shrimp the Mid-Atlantic Ridge (MAR), Rimicaris exoculata and chacei colonized dense diversified in their cephalothoracic cavity digestive system. Although both harbor similar communities, they exhibit widely different population densities,...

10.1002/ece3.70369 article EN cc-by Ecology and Evolution 2024-11-01

In deep-sea hydrothermal vent areas, deprived of light, most animals rely on chemosynthetic symbionts for their nutrition. These may be located cuticle, inside modified organs, or in specialized cells. Nonetheless, many these have an open and functional digestive tract. The shrimp Rimicaris exoculata is fueled mainly by its gill chamber symbionts, but also has a complete system with symbionts. are found the foregut midgut, roles remain unknown. We used genome-resolved metagenomics separate...

10.1186/s40168-022-01380-2 article EN cc-by Microbiome 2022-11-05

At deep-sea hydrothermal vents, deprived of light, most living communities are fuelled by chemosynthetic microorganisms. These can form symbiotic associations with metazoan hosts, which then called holobionts. Among these, two endemic shrimp the Mid-Atlantic Ridge (MAR), Rimicaris exoculata and chacei colonized dense diversified in their cephalothoracic cavity digestive system. Although both harbor similar communities, they exhibit widely different population densities, distribution patterns...

10.22541/au.171309964.46362343/v1 preprint EN Authorea (Authorea) 2024-04-14

The shrimp Rimicaris exoculata and chacei are visually dominant fauna co-occurring at deep-sea hydrothermal sites of the Mid-Atlantic Ridge (MAR). Their co-existence was related to contrasted life-history traits, including differences in their diet reliance on chemoautotrophic symbionts adult stage. Both species colonized by diversified chemosynthetic symbiotic microbial communities cephalothoracic cavity. Symbiotic association with bacteria also evidenced digestive system, major lineages...

10.3389/fmars.2022.903748 article EN cc-by Frontiers in Marine Science 2022-06-20

Abstract Most animal species have a singular developmental pathway and adult ecology, but plasticity is well-known in some such as honeybees where castes display profoundly different morphology ecology. An intriguing case the Atlantic deep-sea hydrothermal vent shrimp pair Rimicaris hybisae R. chacei that share dominant COI haplotypes could represent very recently diverging lineages or even morphs of same species. symbiont-reliant with hypertrophied head chamber (in Mid-Cayman Spreading...

10.1093/evolut/qpad217 article EN cc-by-nc-nd Evolution 2023-12-09

Abstract Background In deep-sea hydrothermal vent areas, deprived of light, most animals rely on chemosynthetic symbionts for their nutrition. These may be located cuticle, inside modified organs, or in specialized cells. Nonetheless, many these have an open and functional digestive tract. The shrimp Rimicaris exoculata is fueled mainly by its gill chamber symbionts, but also has a complete system with symbionts. are found the foregut midgut, roles remain unknown. We used genome-resolved...

10.21203/rs.3.rs-1584541/v1 preprint EN cc-by Research Square (Research Square) 2022-04-27

Abstract Most animal species have a singular developmental pathway and adult ecology, but plasticity is well-known in some like honeybees where castes display profoundly different morphology ecology. An intriguing case the Atlantic deep-sea hydrothermal vent shrimp Rimicaris hybisae/chacei that share dominant COI haplotypes develops into either symbiont-reliant hybisae with hypertrophied head chamber (in Mid-Cayman Spreading Centre) or mixotrophic chacei narrow (on Mid-Atlantic Ridge). Here,...

10.1101/2023.07.02.547428 preprint EN cc-by-nc bioRxiv (Cold Spring Harbor Laboratory) 2023-07-03

Abstract The shrimps Rimicaris exoculata and chacei are visually dominant fauna co-occurring at deep-sea hydrothermal sites of the Mid-Atlantic Ridge (MAR). Their co-existence was related to contrasted life-history traits, among which differences in their diet reliance on chemoautotrophic symbionts adult stage. Both colonized by diversified chemosynthetic symbiotic microbial communities cephalothoracic cavity. Symbiotic association with bacteria also evidenced digestive system, major...

10.1101/2022.04.04.486049 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2022-04-04
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