A sad tale: has the small mussel<i>Idas argenteus</i>lost its symbionts?

Rodrigues, Clara F.; Laming, Sven R.; Gaudron, Sylvie M.; Oliver, Graham; Bris, Nadine Le; Duperron, Sébastien

doi:10.1111/bij.12431

Cited by 15 publications

(17 citation statements)

References 27 publications

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“…For Bathymodiolinae, crawling has been recorded in juvenile and adult specimens in Idas argenteus, I. modiolaeformis, and "I." simpsoni, (Rodrigues et al, 2015; Supplementary Material 1). However, the factors that trigger larval settlement are not yet known.…”

Section: Larval Settlement and Recruitmentmentioning

confidence: 99%

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review

2018

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Mussels within the subfamily Bathymodiolinae, in particular the larger Bathymodiolus species (sensu lato) thriving at cold seeps and hydrothermal vents, are among the most iconic fauna to colonize deep-sea reducing habitats globally. Fuelled by energy derived from chemosynthetic symbioses, their contribution to ecosystem productivity is conspicuous, with many bathymodioline species forming dense, extensive aggregates. Chemosymbiotic mussels play crucial roles as ecosystem engineers, both through the formation of spatially heterogeneous biogenic reefs and in redistributing reduced-fluid emissions. The notable absence of Bathymodiolinae outside of reducing ecosystems affirms their dependency on these ephemeral habitats, placing spatiotemporal constraints on dispersal to, and colonization of nascent, chemosynthetically active substrata. Thus, although symbioses may explain why these mussels are so productive in deep-sea reducing habitats, species' survival over successive generations depends largely upon the adaptive characteristics of their lifecycle as a whole. Despite accumulating data on the biology and ecology of adults however, details remain fragmented regarding earlier developmental junctures during their development. This paper therefore brings together results from research undertaken over recent years on this topic, providing a synthesis of various lifecycle aspects of bathymodiolins from the earliest stages of development, gametogenesis, through to sexual maturity, including the intrinsic, emerging role of symbionts. The review provides a comprehensive overview of our current understanding and identifies areas where further study into these keystone organisms is warranted. The benefits of applying an integrated, lifecycle approach when evaluating the potential impacts of global change and anthropogenic activities upon deep-sea fauna and their habitats are then discussed.

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Section: Larval Settlement and Recruitmentmentioning

confidence: 99%

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review

2018

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“…When compared with larger seep and vent species, smaller bathymodiolins can often colonise a greater diversity of habitats over a broader geographical scale [ 8 ], particularly in the Mediterranean Sea and adjoining Iberian margin where they are prevalent on various organic falls and cold seeps ([ 5 ], and references therein). In at least one small-sized bathymodioline that hosts a variety of symbionts, Idas modiolaeformis , bacterial composition and diversity appears to vary with collection site, revealing a level of variability not yet reported in larger vent and seep mussels [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Fickle or Faithful: The Roles of Host and Environmental Context in Determining Symbiont Composition in Two Bathymodioline Mussels

et al. 2015

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The Mediterranean Sea and adjoining East Atlantic Ocean host a diverse array of small-sized mussels that predominantly live on sunken, decomposing organic remains. At least two of these, Idas modiolaeformis and Idas simpsoni, are known to engage in gill-associated symbioses; however, the composition, diversity and variability of these symbioses with changing habitat and location is poorly defined. The current study presents bacterial symbiont assemblage data, derived from 454 pyrosequencing carried out on replicate specimens of these two host species, collected across seven sample sites found in three oceanographic regions in the Mediterranean and East Atlantic. The presence of several bacterial OTUs in both the Mediterranean Sea and eastern Atlantic suggests that similar symbiont candidates occur on both sides of the Strait of Gibraltar. The results reveal markedly different symbiotic modes in the two species. Idas modiolaeformis displays high symbiont diversity and flexibility, with strong variation in symbiont composition from the East Mediterranean to the East Atlantic. Idas simpsoni displays low symbiont diversity but high symbiont fidelity, with a single dominant OTU occurring in all specimens analysed. These differences are argued to be a function of the host species, where subtle differences in host evolution, life-history and behaviour could partially explain the observed patterns. The variability in symbiont compositions, particularly in Idas modiolaeformis, is thought to be a function of the nature, context and location of the habitat from which symbiont candidates are sourced.

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“…The recent paper on Idas argenteus (Rodrigues et al 2015) shows that quite different feeding strategies can be adopted by sister taxa, I. argenteus lacking symbionts and its sister taxon I. washingtonia being chemosymbiotic (Southward 2008). With so few morphological studies and the known variance in feeding strategies, no new generic taxa are proposed here.…”

Section: Discussionmentioning

confidence: 97%

“…Here again however this condition is found throughout the various clades (eg. Idas, see Rodrigues et al 2015) and is perhaps more related to feeding ecology than phylogeny.…”

Section: Discussionmentioning

confidence: 99%

“…It was later considered to be an un-described species of Bathymodiolus by McKiness et al (2005) then as an un-described species of Adipicola by Southward (2008) and as a code number only by Fontanez and Cavanaugh (2013). It has most recently been linked with the clade that includes Benthomodiolus (Lorion et al 2013, Thubaut et al 2013, Rodrigues et al 2015.…”

Section: Introductionmentioning

confidence: 99%

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