Data/hora: 01/06/2024 19:06:06

Provedor de dados: 	5	
País: 	France	
Título: 	Integrative taxonomy revisits the ontogeny and trophic niches of   Rimicaris   vent shrimps	
Autores: 	Methou, Pierre; Michel, Loic; Segonzac, Michel; Cambon-bonavita, Marie-anne; Pradillon, Florence.	
Data: 	2020-07	
Ano: 	2020	
Palavras-chave: 	Hydrothermal vents; Stable isotopes; Taxonomy; Crustaceans; Life history; Trophic shift.	
Resumo: 	Among hydrothermal vent species, Rimicaris exoculata is one of the most emblematic, hosting abundant and diverse ectosymbioses that provide most of its nutrition. Rimicaris exoculata co-occurs in dense aggregates with the much less abundant Rimicaris chacei in many Mid-Atlantic Ridge vent fields. This second shrimp also houses ectosymbiotic microorganisms but has a mixotrophic diet. Recent observations have suggested potential misidentifications between these species at their juvenile stages, which could have led to misinterpretations of their early-life ecology. Here, we confirm erroneous identification of the earliest stages and propose a new set of morphological characters unambiguously identifying juveniles of each species. On the basis of this reassessment, combined use of C, N and S stable isotope ratios reveals distinct ontogenic trophic niche shifts in both species, from photosynthesis-based nutrition before settlement, towards a chemosynthetic diet afterwards. Furthermore, isotopic compositions in the earliest juvenile stages suggest differences in larval histories. Each species thus exhibits specific early-life strategies that would, without our re-examination, have been interpreted as ontogenetic variations. Overall, our results provide a good illustration of the identification issues persisting in deep-sea ecosystems and the importance of integrative taxonomy in providing an accurate view of fundamental aspects of the biology and ecology of species inhabiting these environments.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00640/75227/75368.pdf

https://archimer.ifremer.fr/doc/00640/75227/75369.pdf

https://archimer.ifremer.fr/doc/00640/75227/75370.pdf

DOI:10.1098/rsos.200837

https://archimer.ifremer.fr/doc/00640/75227/	
Editor: 	The Royal Society	
Formato: 	application/pdf	
Fonte: 	Royal Society Open Science (2054-5703) (The Royal Society), 2020-07 , Vol. 7 , N. 7 , P. 200837 (13p.)	
Fonte: 	info:eu-repo/semantics/openAccess

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