The deposit feeder Capitella teleta has a unique and relatively complex microbiome likely supporting its ability to degrade pollutants

Hochstein, Rebecca; Zhang, Qian; Sadowsky, Michael J.; Forbes, Valery E.

doi:10.1016/j.scitotenv.2019.03.255

Cited by 18 publications

(12 citation statements)

References 32 publications

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“…Nevertheless, our knowledge of the evolution of hologenomes and the role of microbes in the evolution of their hosts is mainly based on information obtained on mammals [ 10 , 11 , 20 , 28 ] and terrestrial insects [ 13 , 14 , 17 , 24 , 25 ]. Among marine invertebrates (whose diversity makes more than 90% of aquatic species), associated microbiomes have been described for some sponges [ 29 , 30 ], cnidarians [ 31 , 32 ], and polychaetes [ 33 , 34 ], but in general marine invertebrate remain poorly studied in this respect.…”

Section: Introductionmentioning

confidence: 99%

Divergence together with microbes: A comparative study of the associated microbiomes in the closely related Littorina species

et al. 2021

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Any multicellular organism during its life is involved in relatively stable interactions with microorganisms. The organism and its microbiome make up a holobiont, possessing a unique set of characteristics and evolving as a whole system. This study aimed to evaluate the degree of the conservativeness of microbiomes associated with intertidal gastropods. We studied the composition and the geographic and phylogenetic variability of the gut and body surface microbiomes of five closely related sympatric Littorina (Neritrema) spp. and a more distant species, L. littorea, from the sister subgenus Littorina (Littorina). Although snail-associated microbiomes included many lineages (207–603), they were dominated by a small number of OTUs of the genera Psychromonas, Vibrio, and Psychrilyobacter. The geographic variability was greater than the interspecific differences at the same collection site. While the microbiomes of the six Littorina spp. did not differ at the high taxonomic level, the OTU composition differed between groups of cryptic species and subgenera. A few species-specific OTUs were detected within the collection sites; notably, such OTUs never dominated microbiomes. We conclude that the composition of the high-rank taxa of the associated microbiome (“scaffolding enterotype”) is more evolutionarily conserved than the composition of the low-rank individual OTUs, which may be site- and / or species-specific.

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Section: Introductionmentioning

confidence: 99%

Divergence together with microbes: A comparative study of the associated microbiomes in the closely related Littorina species

et al. 2021

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“…Despite that Pseudoalteromonas sp. has a predominant role in hydrocarbon and heavy metal remediation, it is known to efficiently degrade hydrocarbons in association with other bacteria [33,43,44], and from our study co-culturing with Alcanivorax sp. SZN2 does not appear to result in the most efficient complementation.…”

Section: Discussionmentioning

confidence: 57%

Degradation of Hydrocarbons and Heavy Metal Reduction by Marine Bacteria in Highly Contaminated Sediments

et al. 2020

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Investigations on the ability of bacteria to enhance removal of hydrocarbons and reduce heavy metal toxicity in sediments are necessary to design more effective bioremediation strategies. In this study, five bacterial strains, Halomonas sp. SZN1, Alcanivorax sp. SZN2, Pseudoalteromonas sp. SZN3, Epibacterium sp. SZN4, and Virgibacillus sp. SZN7, were isolated from polluted sediments from an abandoned industrial site in the Gulf of Naples, Mediterranean Sea, and tested for their bioremediation efficiency on sediment samples collected from the same site. These bacteria were added as consortia or as individual cultures into polluted sediments to assess biodegradation efficiency of polycyclic aromatic hydrocarbons and heavy metal immobilisation capacity. Our results indicate that these bacteria were able to remove polycyclic aromatic hydrocarbons, with a removal rate up to ca. 80% for dibenzo-anthracene. In addition, these bacteria reduced arsenic, lead, and cadmium mobility by promoting their partitioning into less mobile and bioavailable fractions. Microbial consortia generally showed higher performance toward pollutants as compared with pure isolates, suggesting potential synergistic interactions able to enhance bioremediation capacity. Overall, our findings suggest that highly polluted sediments select for bacteria efficient at reducing the toxicity of hazardous compounds, paving the way for scaled-up bioremediation trials.

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“…The simplest interpretation of such changes is that they could be driven by undetected commensal organisms, e.g., a gut microbiome community (Dale et al 2019;Hochstein et al 2019); however, evidence is accumulating that enzymes coded in the worm genome could account for the differences (Monroig et al 2013;Liu et al 2017;Kabeya et al 2018). If dominant infaunal animals such as Alitta virens can synthesise substantial quantities of fatty acids such as EPA, some revision of our understanding of lipid biosynthesis in marine ecosystems may be necessary.…”

Section: Discussionmentioning

confidence: 99%

Trophic upgrading of long-chain polyunsaturated fatty acids by polychaetes: a stable isotope approach using Alitta virens

et al. 2021

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Polychaete worms are rich sources of polyunsaturated fatty acids (PUFA) and are increasingly incorporated into aquaculture broodstock diets. Conventionally, the build-up of PUFA in polychaetes was considered passive, with direct accumulation along the food web, originating with microalgae and other primary producers. However, it has been argued that polychaetes (and other multicellular eukaryotes) are capable of PUFA biosynthesis through the elongation and desaturation of precursor lipids. We further test this hypothesis in the ecologically and economically important nereid polychaete Alitta virens by adopting a stable isotope labelling approach. Worms were fed a 13C-1-palmitic acid (C16:0) enriched diet with the resulting isotopically enriched lipid products identified over a 7-day period. The data showed strong evidence of lipid elongation and desaturation, but with a high rate of PUFA turnover. A putative biosynthetic pathway is proposed, terminating with docosahexaenoic acid (DHA) via arachidonic (AA) and eicosapentaenoic acids (EPA) and involving a Δ8 desaturase.

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The deposit feeder Capitella teleta has a unique and relatively complex microbiome likely supporting its ability to degrade pollutants

Cited by 18 publications

References 32 publications

Divergence together with microbes: A comparative study of the associated microbiomes in the closely related Littorina species

Divergence together with microbes: A comparative study of the associated microbiomes in the closely related Littorina species

Degradation of Hydrocarbons and Heavy Metal Reduction by Marine Bacteria in Highly Contaminated Sediments

Trophic upgrading of long-chain polyunsaturated fatty acids by polychaetes: a stable isotope approach using Alitta virens

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