ArticlePloS one2018
Cryptic frenulates are the dominant chemosymbiotrophic fauna at Arctic and high latitude Atlantic cold seeps.
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 45 citations in OpenAlex.
- The Mitochondrial Genomes ofGenes · 2024Article
- Bacterial symbiont diversity in Arctic seep Oligobrachia siboglinids.Animal microbiome · 2023Article
- Distribution of Siboglinids (Annelida, Siboglinidae) in the Laptev Sea and Adjacent Areas of the Arctic Basin.Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2023Article
- The phylogeography and ecology ofHeliyon · 2023Article
- Article
- Sensory cells and the organization of the peripheral nervous system of the siboglinid Oligobrachia haakonmosbiensis Smirnov, 2000.BMC zoology · 2022Article
- Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds.Nature communications · 2021Article
- The First Discovery of Pogonophora (Annelida, Siboglinidae) in the East Siberian Sea Coincides with the Areas of Methane Seeps.Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2021Article
- Frenulate siboglinids at high Arctic methane seeps and insight into high latitude frenulate distribution.Ecology and evolution · 2020Article
- Article
- First Discovery of Pogonophora (Annelida, Siboglinidae) in the Kara Sea Coincide with the Area of High Methane Concentration.Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2020Article
- Atypical biological features of a new cold seep site on the Lofoten-Vesterålen continental margin (northern Norway).Scientific reports · 2019Article
- Article
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Authors and funding
9 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We provide the first detailed identification of Barents Sea cold seep frenulate hosts and their symbionts. Mitochondrial COI sequence analysis, in combination with detailed morphological investigations through both light and electron microscopy was used for identifying frenulate hosts, and comparing them to Oligobrachia haakonmosbiensis and Oligobrachia webbi, two morphologically similar species known from the Norwegian Sea. Specimens from sites previously assumed to host O. haakonmosbiensis were included in our molecular analysis, which allowed us to provide new insight on the debate regarding species identity of these Oligobrachia worms. Our results indicate that high Arctic seeps are inhabited by a species that though closely related to Oligobrachia haakonmosbiensis, is nonetheless distinct. We refer to this group as the Oligobrachia sp. CPL-clade, based on the colloquial names of the sites they are currently known to inhabit. Since members of the Oligobrachia sp. CPL-clade cannot be distinguished from O. haakonmosbiensis or O. webbi based on morphology, we suggest that a complex of cryptic Oligobrachia species inhabit seeps in the Norwegian Sea and the Arctic. The symbionts of the Oligobrachia sp. CPL-clade were also found to be closely related to O. haakonmosbiensis symbionts, but genetically distinct. Fluorescent in situ hybridization and transmission electron micrographs revealed extremely dense populations of bacteria within the trophosome of members of the Oligobrachia sp. CPL-clade, which is unusual for frenulates. Bacterial genes for sulfur oxidation were detected and small rod shaped bacteria (round in cross section), typical of siboglinid-associated sulfur-oxidizing bacteria, were seen on electron micrographs of trophosome bacteriocytes, suggesting that sulfide constitutes the main energy source. We hypothesize that specific, local geochemical conditions, in particular, high sulfide fluxes and concentrations could account for the unusually high symbiont densities in members of the Oligrobrachia sp. CPL-clade.
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