Data/hora: 07/06/2024 00:23:19

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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