Temporal variation in chemoautotrophic symbiont abundance in the thyasirid bivalve Thyasira cf. gouldi

Laurich, Jason; Batstone, Rebecca T.; Dufour, Suzanne C.

doi:10.1007/s00227-015-2727-4

Cited by 11 publications

(15 citation statements)

References 46 publications

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“…Indeed, Loripes orbiculatus is generally attributed a mixotrophic status, with a significant part of chemoautotrophic nutrition (Schweimanns and Felbeck 1985;Herry et al 1989;Taylor and Glover 2006), but supplemented by heterotrophic feeding through the ingestion of particulate organic matter (Le Pennec et al 1988;Duplessis et al 2004;Rossi et al 2013;van der Geest et al 2014). A similar temporal fluctuation in symbiont abundance, a proxy for bacteriocytes, was also observed in Thysirids according to season (Laurich et al 2015). More recently, the postulate of the heterotrophic nutrition of Loripes has been strengthened by the ability of this host's symbionts to digest complex polysaccharides (Yuen et al 2019), typically found in marine phytoplankton (Mühlenbruch et al 2018).…”

Section: Sexually Determined Mucocytesmentioning

confidence: 84%

A trade-off between mucocytes and bacteriocytes in Loripes orbiculatus gills (Bivalvia, Lucinidae): a mixotrophic adaptation to seasonality and reproductive status in a symbiotic species?

et al. 2020

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Section: Sexually Determined Mucocytesmentioning

confidence: 84%

A trade-off between mucocytes and bacteriocytes in Loripes orbiculatus gills (Bivalvia, Lucinidae): a mixotrophic adaptation to seasonality and reproductive status in a symbiotic species?

et al. 2020

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“…Further, hybridization with a lipophilic dye revealed lipid-rich structures near the sites of bacterial attachment, supporting internalization and possible host endocytosis of bacteria (39). To our knowledge, the only other example of this mechanism for nutrient acquisition is in thyasirid clams, whose extracellular symbionts are periodically engulfed and digested by host gill epithelial cells (40). It remains a possibility that Laminatubus and Bispira also recover specific small carbon molecules from the bacteria (e.g.…”

Section: Discussionmentioning

confidence: 99%

Sequestration of Methane by Symbiotic Deep-Sea Annelids: Ancient and Future Implications of Redefining the Seep Influence

Goffredi

Ekin

Mullin

et al. 2019

Preprint

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25Deep-sea methane seeps are dynamic sources of greenhouse gas production and unique 26 habitats supporting ocean biodiversity and productivity. Here, we demonstrate new 27animal-bacterial symbioses fueled by methane, between two undescribed species of 28 annelid (a serpulid Laminatubus and sabellid Bispira) and distinct methane-oxidizing 29Methylococcales bacteria. Worm tissue δ 13 C of -44‰ to -58‰ suggested methane-fueled 30 nutrition for both species and shipboard experiments revealed active assimilation of 13 C-31 labelled CH 4 into animal biomass, occurring via engulfment of methanotrophic bacteria 32 across the host epidermal surface. These worms represent a new addition to the few 33 animals known to intimately associate with methane-oxidizing bacteria, and further 34 explain their enigmatic mass occurrence at 150-million-year-old fossil seeps. High-35 resolution seafloor surveys document significant coverage by these symbioses, beyond 36 typical obligate seep fauna. These findings uncover novel consumers of methane in the 37 deep-sea, and by expanding the known spatial extent of methane seeps, may have 38 important implications for deep-sea conservation.

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“…We modelled an annual cycle that corresponds to the seafloor temperatures at Bonne Bay, which range from 0.7 to 14 °C, approximately (Laurich et al, 2015, see Fig. 1A).…”

Section: Methodsmentioning

confidence: 99%

Symbiosis increases population size and buffers environmental fluctuations in a physiologically-structured model parameterized for thyasirid bivalves

Mariño

Hurford

2021

Preprint

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Symbioses whereby one partner provisions a nutritional resource to the other may alter energy allocation towards reproduction and survival in the recipient partner, potentially impacting population dynamics. Asymbiotic thyasirid bivalves feed predominantly on free-living bacteria, which fluctuate in abundance due to seasonality-driven temperature variations. Symbiotic thyasirids are mixotrophs, gaining nutrients from free-living bacteria and symbiotic bacteria that they host on their enlarged gills. Symbiotic bacteria may function as an additional energy reserve for thyasirids, allowing the hosts to allocate more energy to reproduction. We hypothesize that, for symbiotic thyasirids, the symbionts are a nutritional source that mitigates resource limitation. Using Dynamic Energy Budget theory, we built a physiologically-structured population model assuming equal mortality rates in both species. We find that without seasonal fluctuations, symbiotic thyasirids have higher abundances than asymbiotic thyasirids since the symbionts increase reproduction. Both species have similar population sizes in fluctuating environments, suggesting different adaptations to seasonality: asymbiotic thyasirids have adapted their physiology, while symbiotic thyasirids have adapted through mixotrophy. Our results highlight the significance of linking individual energetics and life-history traits to population dynamics and are the first step towards understanding the role of symbioses in population and community dynamics.

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Temporal variation in chemoautotrophic symbiont abundance in the thyasirid bivalve Thyasira cf. gouldi

Cited by 11 publications

References 46 publications

A trade-off between mucocytes and bacteriocytes in Loripes orbiculatus gills (Bivalvia, Lucinidae): a mixotrophic adaptation to seasonality and reproductive status in a symbiotic species?

A trade-off between mucocytes and bacteriocytes in Loripes orbiculatus gills (Bivalvia, Lucinidae): a mixotrophic adaptation to seasonality and reproductive status in a symbiotic species?

Sequestration of Methane by Symbiotic Deep-Sea Annelids: Ancient and Future Implications of Redefining the Seep Influence

Symbiosis increases population size and buffers environmental fluctuations in a physiologically-structured model parameterized for thyasirid bivalves

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