Chemosynthesis: a neglected foundation of marine ecology and biogeochemistry

Ricci, Francesco; Greening, Chris

doi:10.1016/j.tim.2023.11.013

Cited by 2 publications

(1 citation statement)

References 68 publications

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“…Furthermore, studies investigating microbial communities associated with deep sea foraminifera [ 53 ] and subsurface rocks [ 54 ] have also found an abundance of Cyanobacteria associated in these unlit systems and proposed that they do not necessarily rely on their photoautotrophic metabolism, as their genome shows potential for a hydrogen based lithoautotrophic metabolism [ 54 ]. In fact, chemosynthesis is a widespread process in the ocean [ 55 ]. Thus, it is possible that Cyanobacteria could be a ubiquitous component of many cold and deep sea water coral microbial assemblages.…”

Section: Resultsmentioning

confidence: 99%

Deep sea treasures - Insights from museum archives shed light on coral microbial diversity within deepest ocean ecosystems

Ricci,

Leggat,

Pasella

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Deep sea treasures - Insights from museum archives shed light on coral microbial diversity within deepest ocean ecosystems

Ricci,

Leggat,

Pasella

et al. 2024

Heliyon

Self Cite

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Extracellular chemosymbiont populations in a shallow-water thyasirid clam potentially shaped by priority effect

Li,

Mao

et al. 2024

Preprint

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Chemosymbiosis is a highly successful strategy that evolved in several animal groups, best known for dominating chemosynthetic ecosystems such as deep-sea hot vents and hydrocarbon seeps but also found in other systems such as reducing sediments in shallow water. The symbiont population structure can be determined by the host genetic inheritance, geographic partitions, and environmental factors, among others if the symbionts are acquired horizontally from the environment. Here, we suggest that the earliest colonies can also influence the episymbiont population, known as the “priority effect”, using the thyasirid cleftclamThyasira tokunagai.This species is abundant in reducing sediments in Yellow Sea, hosting an extracellular sulfide-oxidizing symbiont (genusSedimenticola) in the pouch-like structure in the gill. From samples taken across the whole Yellow Sea, complete symbiont genomes revealed only two dominant strains which were also verified by phylogenomic analysis. The two strains share key functional genes but exhibit a single-base difference in the 16S rDNA. We found mutually exclusive communities of these two strains in the 30 individual hosts studied, typically dominated or even monopolized by one strain. Inconsistent phylogenetic relationships between hosts and symbiont indicate the genetic heterogeneity of the holobiont, and the mean fixation indexFSTof each symbiont population within sampling sites showed a lack of correlation with geographic distance and environmental factors, suggesting another driving force. We deduce that the likely scenario is 1) the dominant symbiont strain is determined during initial acquisition; 2) the propagation of this initial strain as the host develops; 3) the continuous but restricted recruitment of the other strain during the adult stage. Overall, our results highlight the importance of “priority effect” in shaping the chemosymbiont population structures even in the horizontally transmitted episymbiont in a whole marginal sea area.

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Chemosynthesis: a neglected foundation of marine ecology and biogeochemistry

Cited by 2 publications

References 68 publications

Deep sea treasures - Insights from museum archives shed light on coral microbial diversity within deepest ocean ecosystems

Deep sea treasures - Insights from museum archives shed light on coral microbial diversity within deepest ocean ecosystems

Extracellular chemosymbiont populations in a shallow-water thyasirid clam potentially shaped by priority effect

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