Plasticity in reproduction and nutrition in wood-boring bivalves (Xylophaga atlantica) from the Mid-Atlantic Ridge

Gaudron, Sylvie M.; Haga, Takuma; Wang, H.; Laming, Sven R.; Duperron, Sébastien

doi:10.1007/s00227-016-2988-6

Cited by 6 publications

(19 citation statements)

References 49 publications

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“…Collectively these rates of maturation are well within the longevity of larger wood and bone accumulations, making these mussels well adapted to their temporally finite habitats (Smith and Baco, 2003;Bernardino et al, 2010;Cunha et al, 2013). Although only rough estimates, they suggest that small chemosymbiotic bathymodiolins reach sexual maturity within an impressively short passage of time, not unlike the xylophagid wood-boring bivalves that initially colonize deep-sea wood habitats (Gaudron et al, 2016).…”

Section: Post Larval Growth To Maturity and The Onset Of Symbiosismentioning

confidence: 91%

“…When they are, it is usually with oocytes notably smaller than those of functional females, suggesting they could be undergoing a sexual transition. Sex determination could be influenced by epigenetic factors, as suggested for other wood-colonizing bivalves (e.g., Gaudron et al, 2016), while larger females likely benefit from higher fecundity.…”

Section: Bathymodiolinae Produce Small Oocytes and Display Complex Sementioning

confidence: 97%

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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: Post Larval Growth To Maturity and The Onset Of Symbiosismentioning

confidence: 91%

Section: Bathymodiolinae Produce Small Oocytes and Display Complex Sementioning

confidence: 97%

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review

2018

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“…A case in point is the elevated δ 15 N signature of dwarf males of Xylophaga s.l. atlantica that was interpreted as evidence of filter feeding on fecal matter and by-products of boring in a dense population (Gaudron et al, 2016). An alternate explanation for these data is that they might reflect dwarf males parasitizing the autonomously boring female to which they attach.…”

Section: Xylophagy: a Flawed Conclusion?mentioning

confidence: 99%

“…The high mean δ 15 N values (4.6 ± 0.5 ) of the autonomously boring females X. s.l. atlantica may reflect the influence of nearby hydrothermal fluid flow (Gaudron et al, 2016).…”

Section: Xylophagy: a Flawed Conclusion?mentioning

confidence: 99%

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Stable Isotopic Evidence of Mixotrophy in Xylophagaids, Deep-Sea Wood-Boring Bivalves

2020

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Deep-sea wood-boring xylophagaid bivalves are thought to ingest only wood and to use nitrogen fixed by their symbiotic microbes. Reconsidering this assumption, we tested whether δ 13 C and δ 15 N isotopic values of ten species in four xylophagaid genera collected between 18 m and 4626 m depth suggest that some may use different trophic strategies. Isotopic signatures of six species were entirely consistent with predicted xylophagy, but four species, three members of the Xylophaga dorsalis clade and Abditoconus heterosiphon, had δ 15 N signatures over 3.7 , significantly higher than the value predicted for nitrogen fixed by bacteria. These species may supplement freshly fixed nitrogen with an alternate source, such as particulate organic material. Although the animals' reduced palps and the lack of microbes in the gut of laboratorymaintained specimens were cited as arguing against filter feeding, the animals may filter feed opportunistically. A. heterosiphon was unique in having δ 13 C signatures more negative than the wood into which they bored, inconsistent with cellulose consumption, and δ 15 N values higher than predicted for nitrogen fixed by bacteria. We suggest that greater trophic diversity may exist among xylophagaids than has been expected. Ecological studies of wood-fall communities cannot assume that the entire community is sustained only by wood-bound energy. We attribute variation in δ 13 C signatures among 42 specimens of X. s.l. zierenbergi from six collections, five at the same depth, to variation in the type of wood bored. Investigators beginning food web studies should sample xylophagaids and wood itself; if the deployment is large, repeated samples of the wood, closely matched to xylophagaids, may be necessarily to fully define the substrate's stable isotopic signal.

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Wood Deterioration by Marine Borers

Pournou

2020

Biodeterioration of Wooden Cultural Heritage

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Plasticity in reproduction and nutrition in wood-boring bivalves (Xylophaga atlantica) from the Mid-Atlantic Ridge

Cited by 6 publications

References 49 publications

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review

Lifecycle Ecology of Deep-Sea Chemosymbiotic Mussels: A Review

Stable Isotopic Evidence of Mixotrophy in Xylophagaids, Deep-Sea Wood-Boring Bivalves

Wood Deterioration by Marine Borers

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