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Budaeva N, Agne S, Ribeiro PA, Straube N, Preick M, Hofreiter M. Wide-spread dispersal in a deep-sea brooding polychaete: the role of natural history collections in assessing the distribution in quill worms (Onuphidae, Annelida). Front Zool 2024; 21:1. [PMID: 38233869 PMCID: PMC10795374 DOI: 10.1186/s12983-023-00520-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/21/2023] [Indexed: 01/19/2024] Open
Abstract
BACKGROUND Modern integrative taxonomy-based annelid species descriptions are detailed combining morphological data and, since the last decades, also molecular information. Historic species descriptions are often comparatively brief lacking such detail. Adoptions of species names from western literature in the past led to the assumption of cosmopolitan ranges for many species, which, in many cases, were later found to include cryptic or pseudocryptic lineages with subtle morphological differences. Natural history collections and databases can aid in assessing the geographic ranges of species but depend on correct species identification. Obtaining DNA sequence information from wet-collection museum specimens of marine annelids is often impeded by the use of formaldehyde and/or long-term storage in ethanol resulting in DNA degradation and cross-linking. RESULTS The application of ancient DNA extraction methodology in combination with single-stranded DNA library preparation and target gene capture resulted in successful sequencing of a 110-year-old collection specimen of quill worms. Furthermore, a 40-year-old specimen of quill worms was successfully sequenced using a standard extraction protocol for modern samples, PCR and Sanger sequencing. Our study presents the first molecular analysis of Hyalinoecia species including the previously known species Hyalinoecia robusta, H. tubicloa, H. artifex, and H. longibranchiata, and a potentially undescribed species from equatorial western Africa morphologically indistinguishable from H. tubicola. The study also investigates the distribution of these five Hyalinoecia species. Reassessing the distribution of H. robusta reveals a geographical range covering both the Atlantic and the Indian Oceans as indicated by molecular data obtained from recent and historical specimens. CONCLUSION Our results represent an example of a very wide geographical distribution of a brooding deep-sea annelid with a complex reproduction strategy and seemingly very limited dispersal capacity of its offspring, and highlights the importance of molecular information from museum specimens for integrative annelid taxonomy and biogeography.
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Affiliation(s)
- Nataliya Budaeva
- Department of Natural History, University Museum of Bergen, University of Bergen, Allégaten 41, 5007, Bergen, Norway.
| | - Stefanie Agne
- Evolutionary Adaptive Genomics, Department of Mathematics and Natural Sciences, Institute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany
| | - Pedro A Ribeiro
- Department of Biological Sciences and Centre for Deep-Sea Research, University of Bergen, Thormøhlens Gate 53B, 5006, Bergen, Norway
| | - Nicolas Straube
- Department of Natural History, University Museum of Bergen, University of Bergen, Allégaten 41, 5007, Bergen, Norway
| | - Michaela Preick
- Evolutionary Adaptive Genomics, Department of Mathematics and Natural Sciences, Institute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany
| | - Michael Hofreiter
- Evolutionary Adaptive Genomics, Department of Mathematics and Natural Sciences, Institute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany
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Eilertsen MH, Kongsrud JA, Tandberg AHS, Alvestad T, Budaeva N, Martell L, Ramalho SP, Falkenhaug T, Huys R, Oug E, Bakken T, Høisæter T, Rauch C, Carvalho FC, Savchenko AS, Ulvatn T, Kongshavn K, Berntsen CM, Olsen BR, Pedersen RB. Diversity, habitat endemicity and trophic ecology of the fauna of Loki's Castle vent field on the Arctic Mid-Ocean Ridge. Sci Rep 2024; 14:103. [PMID: 38167527 PMCID: PMC10761849 DOI: 10.1038/s41598-023-46434-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 11/01/2023] [Indexed: 01/05/2024] Open
Abstract
Loki's Castle Vent Field (LCVF, 2300 m) was discovered in 2008 and represents the first black-smoker vent field discovered on the Arctic Mid-Ocean Ridge (AMOR). However, a comprehensive faunal inventory of the LCVF has not yet been published, hindering the inclusion of the Arctic in biogeographic analyses of vent fauna. There is an urgent need to understand the diversity, spatial distribution and ecosystem function of the biological communities along the AMOR, which will inform environmental impact assesments of future deep-sea mining activities in the region. Therefore, our aim with this paper is to provide a comprehensive inventory of the fauna at LCVF and present a first insight into the food web of the vent community. The fauna of LCVF has a high degree of novelty, with five new species previously described and another ten new species awaiting formal description. Most of the new species from LCVF are either hydrothermal vent specialists or have been reported from other chemosynthesis-based ecosystems. The highest taxon richness is found in the diffuse venting areas and may be promoted by the biogenic habitat generated by the foundation species Sclerolinum contortum. The isotopic signatures of the vent community of LCVF show a clear influence of chemosynthetic primary production on the foodweb. Considering the novel and specialised fauna documented in this paper, hydrothermal vents on the AMOR should be regarded as vulnerable marine ecosystems and protective measures must therefore be implemented, especially considering the potential threat from resource exploration and exploitation activities in the near future.
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Affiliation(s)
- Mari Heggernes Eilertsen
- Department of Biological Sciences, University of Bergen, Bergen, Norway.
- Center for Deep Sea Research, University of Bergen, Bergen, Norway.
| | - Jon Anders Kongsrud
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | | | - Tom Alvestad
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Nataliya Budaeva
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Luis Martell
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Sofia P Ramalho
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Tone Falkenhaug
- Institute of Marine Research, Flødevigen Research Station, His, Norway
| | - Rony Huys
- Department of Life Sciences, Natural History Museum, London, UK
| | - Eivind Oug
- Norwegian Institute for Water Research, Region South, Grimstad, Norway
| | - Torkild Bakken
- Norwegian University of Science and Technology, NTNU University Museum, Trondheim, Norway
| | - Tore Høisæter
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- , Loddefjord, Norway
| | - Cessa Rauch
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Francisca C Carvalho
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Alexandra S Savchenko
- Invertebrate Zoology Department, Biological Faculty, Moscow State University, Moscow, Russia
| | - Tone Ulvatn
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- Center for Deep Sea Research, University of Bergen, Bergen, Norway
| | - Katrine Kongshavn
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | | | | | - Rolf Birger Pedersen
- Center for Deep Sea Research, University of Bergen, Bergen, Norway
- Department of Earth Sciences, University of Bergen, Bergen, Norway
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Berman GH, Johnson SB, Seid CA, Vrijenhoek RC, Rouse GW. Range extensions of Pacific bone-eating worms (Annelida, Siboglinidae, Osedax). Biodivers Data J 2023; 11:e102803. [PMID: 38327359 PMCID: PMC10848615 DOI: 10.3897/bdj.11.e102803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 06/16/2023] [Indexed: 02/09/2024] Open
Abstract
First described in 2004 off California, Osedax worms are now known from many of the world's oceans, ranging from 10 to over 4000 m in depth. Currently, little is known about species ranges, since most descriptions are from single localities. In this study, we used new sampling in the north-eastern Pacific and available GenBank data from off Japan and Brazil to report expanded ranges for five species: Osedaxfrankpressi, O.knutei, O.packardorum, O.roseus and O.talkovici. We also provided additional DNA sequences from previously reported localities for two species: Osedaxpriapus and O.randyi. To assess the distribution of each species, we used cytochrome c oxidase subunit I (COI) sequences to generate haplotype networks and assess connectivity amongst localities where sampling permitted. Osedaxfrankpressi, O.packardorum, O.priapus, O.roseus and O.talkovici all had one or more dominant COI haplotypes shared by individuals at multiple localities, suggesting high connectivity throughout some or all of their ranges. Low ΦST values amongst populations for O.packardorum, O.roseus and O.talkovici confirmed high levels of gene flow throughout their known ranges. High ΦST values for O.frankpressi between the eastern Pacific and the Brazilian Atlantic showed little gene flow, reflected by the haplotype network, which had distinct Pacific and Atlantic haplotype clusters. This study greatly expands the ranges and provides insights into the phylogeography for these nine species.
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Affiliation(s)
- Gabriella H. Berman
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States of AmericaScripps Institution of Oceanography, University of California San DiegoLa Jolla, CAUnited States of America
| | - Shannon B. Johnson
- Monterey Bay Aquarium Research Institute, Moss Landing, United States of AmericaMonterey Bay Aquarium Research InstituteMoss LandingUnited States of America
| | - Charlotte A. Seid
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States of AmericaScripps Institution of Oceanography, University of California San DiegoLa Jolla, CAUnited States of America
| | - Robert C. Vrijenhoek
- Monterey Bay Aquarium Research Institute, Moss Landing, United States of AmericaMonterey Bay Aquarium Research InstituteMoss LandingUnited States of America
| | - Greg W. Rouse
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States of AmericaScripps Institution of Oceanography, University of California San DiegoLa Jolla, CAUnited States of America
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Georgieva MN, Rimskaya-Korsakova NN, Krolenko VI, Van Dover CL, Amon DJ, Copley JT, Plouviez S, Ball B, Wiklund H, Glover AG. A tale of two tubeworms: taxonomy of vestimentiferans (Annelida: Siboglinidae) from the Mid-Cayman Spreading Centre. INVERTEBR SYST 2023. [DOI: 10.1071/is22047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
The vestimentiferan tubeworm genera Lamellibrachia and Escarpia inhabit deep-sea chemosynthesis-based ecosystems, such as seeps, hydrothermal vents and organic falls, and have wide distributions across the Pacific, Atlantic and Indian Oceans. In 2010–2012 during initial explorations of hydrothermal vents of the Mid-Cayman Spreading Centre (MCSC), both genera were found to co-occur at the Von Damm Vent Field (VDVF), a site characterised by diffuse flow, therefore resembling a ‘hydrothermal seep’. Here, we erect two new vestimentiferan tubeworm species from the VDVF, Lamellibrachia judigobini sp. nov. and Escarpia tritentaculata sp. nov. Lamellibrachia judigobini sp. nov. differs genetically and morphologically from other Lamellibrachia species, and has a range that extends across the Gulf of Mexico, MCSC, off Trinidad and Tobago, and Barbados, and also across both vents and seeps and 964–3304-m water depth. Escarpia tritentaculata sp. nov. is distinguished from other Escarpia species primarily based on morphology and is known only from vents of the MCSC at 2300-m depth. This study highlights the incredible habitat flexibility of a single Lamellibrachia species and the genus Escarpia, and historic biogeographic connections to the eastern Pacific for L. judigobini sp. nov. and the eastern Atlantic for E. tritentaculata sp. nov. ZooBank: urn:lsid:zoobank.org:pub:D9F72BD4-FDE1-4C0A-B84B-A08D06F2A981
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The phylogeography and ecology of oligobrachia frenulate species suggest a generalist chemosynthesis-based fauna in the arctic. Heliyon 2023; 9:e14232. [PMID: 36967935 PMCID: PMC10034460 DOI: 10.1016/j.heliyon.2023.e14232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 02/21/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
We used ancient DNA (aDNA) extraction methods to sequence museum voucher samples of Oligobrachia webbi, a frenulate siboglinid polychaete described from a northern Norwegian fjord over fifty years ago. Our sequencing results indicate a genetic match with the cryptic seep species, Oligobrachia haakonmosbiensis (99% pairwise identity for 574 bp mtCOI fragments). Due to its similarity with O. webbi, the identity of O. haakonmosbiensis has been a matter of debate since its description, which we have now resolved. Furthermore, our results demonstrate that chemosynthesis-based siboglinids, that constitute the bulk of the biomass at Arctic seeps are not seep specialists. Our data on sediment geochemistry and carbon and nitrogen content reveal reduced conditions in fjords/sounds, similar to those at seep systems. Accumulation and decomposition of both terrestrial and marine organic matter results in the buildup of methane and sulfide that apparently can sustain chemosymbiotic fauna. The occurrence of fjords and by extension, highly reducing habitats, could have led to Arctic chemosymbiotic species being relatively generalist with their habitat, as opposed to being seep or vent specialists. Our stable isotope analyses indicate the incorporation of photosynthetically derived carbon in some individuals, which aligns with experiments conducted on frenulates before the discovery of chemosynthesis that demonstrated their ability to take up organic molecules from the surrounding sediment. Since reduced gases in non-seep environments are ultimately sourced from photosynthetic processes, we suggest that the extreme seasonality of the Arctic has resulted in Arctic chemosymbiotic animals seasonally changing their degree of reliance on chemosynthetic partners. Overall, the role of chemosynthesis in Arctic benthos and marine ecosystems and links to photosynthesis may be complex, and more extensive than currently known.
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Neal L, Wiklund H, Gunton LM, Rabone M, Bribiesca-Contreras G, Dahlgren TG, Glover AG. Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida). Zookeys 2022; 1137:33-74. [PMID: 36760485 PMCID: PMC9836652 DOI: 10.3897/zookeys.1137.86150] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/01/2022] [Indexed: 12/24/2022] Open
Abstract
This is a contribution in a series of taxonomic publications on benthic fauna of polymetallic nodule fields in the eastern abyssal Clarion-Clipperton Zone (CCZ). The material was collected during environmental surveys targeting exploration contract areas 'UK-1', 'OMS' and 'NORI-D', as well as an Area of Particular Environmental Interest, 'APEI-6'. The annelid families Amphinomidae and Euphrosinidae are investigated here. Taxonomic data are presented for six species from 41 CCZ-collected specimens as identified by a combination of morphological and genetic approaches; of the six species, three are here described as new, one species is likely to be new but in too poor condition to be formalised and the two others likely belong to known species. Description of three new species Euphrosinellageorgievae sp. nov., Euphrosinopsisahearni sp. nov., and Euphrosinopsishalli sp. nov. increases the number of formally described new annelid species from the targeted areas to 21 and CCZ-wide to 52. Molecular data suggest that four of the species reported here are known from CCZ only, but within CCZ they have a wide distribution. In contrast, the species identified as Bathychloeiacf.sibogae Horst, 1910 was found to have a wide distribution within the Pacific based on both morphological and molecular data, using comparative material from the abyssal South Pacific. Bathychloeiacf.balloniformis Böggemann, 2009 was found to be restricted to APEI-6 based on DNA data available from CCZ specimens only, but morphological data from other locations suggest potentially a wide abyssal distribution. The genus Euphrosinopsis was previously known only from Antarctic waters, and Euphrosinellageorgievae sp. nov. was recovered as a sister taxon to the Antarctic specimens of Euphrosinellacf.cirratoformis in our molecular phylogenetic analysis, strengthening the hypothesised link between the deep-sea and Antarctic benthic fauna.
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Affiliation(s)
- Lenka Neal
- Life Sciences Department, Natural History Museum, London SW7 5BD, UKLife Sciences Department, Natural History MuseumLondonUnited Kingdom
| | - Helena Wiklund
- Life Sciences Department, Natural History Museum, London SW7 5BD, UKLife Sciences Department, Natural History MuseumLondonUnited Kingdom,Department of Marine Sciences, University of Gothenburg, Box 463, 40530 Gothenburg, SwedenUniversity of GothenburgGothenburgSweden,Gothenburg Global Biodiversity Centre, Box 463, 40530 Gothenburg, SwedenGothenburg Global Biodiversity CentreGothenburgSweden
| | - Laetitia M. Gunton
- Australian Museum Research Institute, 1 William Street, Sydney NSW 2010, AustraliaAustralian Museum Research InstituteSydneyAustralia
| | - Muriel Rabone
- Life Sciences Department, Natural History Museum, London SW7 5BD, UKLife Sciences Department, Natural History MuseumLondonUnited Kingdom
| | - Guadalupe Bribiesca-Contreras
- Life Sciences Department, Natural History Museum, London SW7 5BD, UKLife Sciences Department, Natural History MuseumLondonUnited Kingdom
| | - Thomas G. Dahlgren
- Department of Marine Sciences, University of Gothenburg, Box 463, 40530 Gothenburg, SwedenUniversity of GothenburgGothenburgSweden,Gothenburg Global Biodiversity Centre, Box 463, 40530 Gothenburg, SwedenGothenburg Global Biodiversity CentreGothenburgSweden,NORCE Norwegian Research Centre, Bergen, NorwayNORCE Norwegian Research CentreBergenNorway
| | - Adrian G. Glover
- Life Sciences Department, Natural History Museum, London SW7 5BD, UKLife Sciences Department, Natural History MuseumLondonUnited Kingdom
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Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea. BIOLOGY 2022; 11:biology11121705. [PMID: 36552215 PMCID: PMC9774262 DOI: 10.3390/biology11121705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/29/2022]
Abstract
Ice shelves cover ~1.6 million km2 of the Antarctic continental shelf and are sensitive indicators of climate change. With ice-shelf retreat, aphotic marine environments transform into new open-water spaces of photo-induced primary production and associated organic matter export to the benthos. Predicting how Antarctic seafloor assemblages may develop following ice-shelf loss requires knowledge of assemblages bordering the ice-shelf margins, which are relatively undocumented. This study investigated seafloor assemblages, by taxa and functional groups, in a coastal polynya adjacent to the Larsen C Ice Shelf front, western Weddell Sea. The study area is rarely accessed, at the frontline of climate change, and located within a CCAMLR-proposed international marine protected area. Four sites, ~1 to 16 km from the ice-shelf front, were explored for megabenthic assemblages, and potential environmental drivers of assemblage structures were assessed. Faunal density increased with distance from the ice shelf, with epifaunal deposit-feeders a surrogate for overall density trends. Faunal richness did not exhibit a significant pattern with distance from the ice shelf and was most variable at sites closest to the ice-shelf front. Faunal assemblages significantly differed in composition among sites, and those nearest to the ice shelf were the most dissimilar; however, ice-shelf proximity did not emerge as a significant driver of assemblage structure. Overall, the study found a biologically-diverse and complex seafloor environment close to an ice-shelf front and provides ecological baselines for monitoring benthic ecosystem responses to environmental change, supporting marine management.
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Chen C, Hilário A, Rodrigues CF, Ramirez-Llodra E. Integrative taxonomy of a new cocculinid limpet dominating the Aurora Vent Field in the central Arctic ocean. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220885. [PMID: 36249326 PMCID: PMC9554515 DOI: 10.1098/rsos.220885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Deep-sea hydrothermal vents host lush chemosynthetic communities, dominated by endemic fauna that cannot live in other ecosystems. Despite over 500 active vents found worldwide, the Arctic has remained a little-studied piece of vent biogeography. Though located as early as 2001, the faunal communities of the Aurora Vent Field on the ultra-slow spreading Gakkel Ridge remained unsampled until recently, owing to difficulties with sampling on complex topography below permanent ice. Here, we report an unusual cocculinid limpet abundant on inactive chimneys in Aurora (3883-3884 m depth), describing it as Cocculina aurora n. sp. using an integrative approach combining traditional dissection, electron microscopy, molecular phylogeny, and three-dimensional anatomical reconstruction. Gross anatomy of the new species was typical for Cocculina, but it has a unique radula with broad, multi-cuspid rachidian where the outermost lateral is reduced compared to typical cocculinids. A phylogenetic reconstruction using the mitochondrial COI gene also confirmed its placement in Cocculina. Only the second cocculinid found at vents following the description of the Antarctic Cocculina enigmadonta, this is currently the sole cocculinid restricted to vents. Our discovery adds to the evidence that Arctic vents host animal communities closely associated with wood falls and distinct from other parts of the world.
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Affiliation(s)
- Chong Chen
- X-STAR, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
| | - Ana Hilário
- Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Clara F. Rodrigues
- Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Eva Ramirez-Llodra
- Norwegian Institute for Water Research, Oslo, Norway
- REV Ocean, Lysaker, Norway
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Rimskaya-Korsakova N, Karaseva N, Pimenov T, Rapp HT, Southward E, Temereva E, Worsaae K. Myogenesis of Siboglinum fiordicum sheds light on body regionalisation in beard worms (Siboglinidae, Annelida). Front Zool 2021; 18:44. [PMID: 34530856 PMCID: PMC8447566 DOI: 10.1186/s12983-021-00426-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/17/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Many annelids, including well-studied species such as Platynereis, show similar structured segments along their body axis (homonomous segmentation). However, numerous annelid species diverge from this pattern and exhibit specialised segments or body regions (heteronomous segmentation). Recent phylogenomic studies and paleontological findings suggest that a heteronomous body architecture may represent an ancestral condition in Annelida. To better understand the segmentation within heteronomous species we describe the myogenesis and mesodermal delineation of segments in Siboglinum fiordicum during development. RESULTS Employing confocal and transmission electron microscopy we show that the somatic longitudinal musculature consists of four separate strands, among which ventrolateral one is the most prominent and is proposed to drive the search movements of the head of the late metatrochophore. The somatic circular musculature lies inside the longitudinal musculature and is predominantly developed at the anterior end of the competent larva to support the burrowing behaviour. Our application of transmission electron microscopy allows us to describe the developmental order of the non-muscular septa. The first septum to form is supported by thick bundles of longitudinal muscles and separates the body into an anterior and a posterior region. The second group of septa to develop further divides the posterior body region (opisthosoma) and is supported by developing circular muscles. At the late larval stage, a septum reinforced by circular muscles divides the anterior body region into a forepart and a trunk segment. The remaining septa and their circular muscles form one by one at the very posterior end of the opisthosoma. CONCLUSIONS The heteronomous Siboglinum lacks the strict anterior to posterior sequence of segment formation as it is found in the most studied annelid species. Instead, the first septum divides the body into two body regions before segments are laid down in first the posterior opisthosoma and then in the anterior body, respectively. Similar patterns of segment formation are described for the heteronomous chaetopterid Chaetopterus variopedatus and serpulid Hydroides elegans and may represent an adaptation of these annelids to the settlement and transition to the sedentarian-tubiculous mode of life.
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Affiliation(s)
| | - Nadezda Karaseva
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Timofei Pimenov
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Hans Tore Rapp
- Centre for Geobiology and Department of Biology, University of Bergen, Bergen, Norway
| | - Eve Southward
- Marine Biological Association of the U.K., Citadel Hill, Plymouth, PL1 2PB, UK
| | - Elena Temereva
- Department of Invertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
- Faculty Biology and Biotechnology, National Research University Higher School of Economics, Moscow, Russia
| | - Katrine Worsaae
- Marine Biological Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark
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Gunton LM, Kupriyanova EK, Alvestad T, Avery L, Blake JA, Biriukova O, Böggemann M, Borisova P, Budaeva N, Burghardt I, Capa M, Georgieva MN, Glasby CJ, Hsueh PW, Hutchings P, Jimi N, Kongsrud JA, Langeneck J, Meißner K, Murray A, Nikolic M, Paxton H, Ramos D, Schulze A, Sobczyk R, Watson C, Wiklund H, Wilson RS, Zhadan A, Zhang J. Annelids of the eastern Australian abyss collected by the 2017 RV 'Investigator' voyage. Zookeys 2021; 1020:1-198. [PMID: 33708002 PMCID: PMC7930015 DOI: 10.3897/zookeys.1020.57921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/01/2020] [Indexed: 01/18/2023] Open
Abstract
In Australia, the deep-water (bathyal and abyssal) benthic invertebrate fauna is poorly known in comparison with that of shallow (subtidal and shelf) habitats. Benthic fauna from the deep eastern Australian margin was sampled systematically for the first time during 2017 RV 'Investigator' voyage 'Sampling the Abyss'. Box core, Brenke sledge, and beam trawl samples were collected at one-degree intervals from Tasmania, 42°S, to southern Queensland, 24°S, from 900 to 4800 m depth. Annelids collected were identified by taxonomic experts on individual families around the world. A complete list of all identified species is presented, accompanied with brief morphological diagnoses, taxonomic remarks, and colour images. A total of more than 6000 annelid specimens consisting of 50 families (47 Polychaeta, one Echiura, two Sipuncula) and 214 species were recovered. Twenty-seven species were given valid names, 45 were assigned the qualifier cf., 87 the qualifier sp., and 55 species were considered new to science. Geographical ranges of 16 morphospecies extended along the eastern Australian margin to the Great Australian Bight, South Australia; however, these ranges need to be confirmed with genetic data. This work providing critical baseline biodiversity data on an important group of benthic invertebrates from a virtually unknown region of the world's ocean will act as a springboard for future taxonomic and biogeographic studies in the area.
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Affiliation(s)
| | - Elena K. Kupriyanova
- Australian Museum Research Institute, Sydney, Australia
- Macquarie University, Sydney, Australia
| | - Tom Alvestad
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | | | - James A. Blake
- Aquatic Research & Consulting, Duxbury, Massachusetts, USA
| | - Olga Biriukova
- Museum and Art Gallery of the Northern Territory, Darwin, Australia
| | | | - Polina Borisova
- P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | - Nataliya Budaeva
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
- P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | | | - Maria Capa
- Department of Biology, University of the Balearic Islands, Palma, Spain
| | | | | | - Pan-Wen Hsueh
- Department of Life Sciences, National Chung Hsing University, Taichung City, China
| | - Pat Hutchings
- Australian Museum Research Institute, Sydney, Australia
- Macquarie University, Sydney, Australia
| | - Naoto Jimi
- National Institute of Polar Research, Tachikawa, Tokyo, Japan
| | - Jon A. Kongsrud
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | | | - Karin Meißner
- Forschungsinstitut Senckenberg, DZMB, Hamburg, Germany
| | - Anna Murray
- Australian Museum Research Institute, Sydney, Australia
| | | | - Hannelore Paxton
- Australian Museum Research Institute, Sydney, Australia
- Macquarie University, Sydney, Australia
| | | | - Anja Schulze
- Texas A&M University at Galveston, Galveston, TX, USA
| | - Robert Sobczyk
- Department of Zoology of Invertebrates and Hydrobiology, University of Lodz, Lodz, Poland
| | - Charlotte Watson
- Museum and Art Gallery of the Northern Territory, Darwin, Australia
| | - Helena Wiklund
- Natural History Museum, London, UK
- Gothenburg Global Biodiversity Centre and University of Gothenburg, Gothenburg, Sweden
| | | | - Anna Zhadan
- Biological Faculty, Lomonosov Moscow State University, Moscow, Russia
| | - Jinghuai Zhang
- South China Sea Environmental Monitoring Centre, State Oceanic Administration, Guangzhou, China
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11
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Karaseva NP, Rimskaya-Korsakova NN, Ekimova IA, Gantsevich MM, Kokarev VN, Kremnyov SV, Simakov MI, Udalov AA, Vedenin AA, Malakhov VV. A new genus of frenulates (Annelida: Siboglinidae) from shallow waters of the Yenisey River estuary, Kara Sea. INVERTEBR SYST 2021. [DOI: 10.1071/is20075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Only seven frenulate species are currently known along the Eurasian coast of the Arctic Ocean. We describe a new genus and a new species of frenulates Crispabrachia yenisey, gen. nov. et sp. nov. The morphological analysis involved standard anatomical techniques, semithin sections and scanning electron microscopy (SEM). The molecular study included four markers (partial COI, 16S, 18S and 28S) and implemented Bayesian and Maximum likelihood phylogenetic approaches. The description of Crispabrachia gen. nov. is the first documented finding of frenulates in the Kara Sea at the estuary of the Yenisey River in rather shallow water (28 m). The establishment of a new genus is warranted based on the composition of morphological characters and several specific features including free, comparatively short curly tentacles, a triangular cephalic lobe with amplate base, the valvate extension of the posterior part of the forepart and prominent papillae on the nonmetameric region. The tube structure with prominent frills and the worm’s numerous tentacles, metameric papillae with cuticular plaques and segmental furrow on the forepart indicate that the new genus belongs to the polybrachiid group. Although the type locality in the Yenisey River estuary is unusual for siboglinids in general, the physical conditions here are common for other frenulates habitats, i.e. salinity ~30–33, bottom water temperature –1.5°C. This finding was made in the Yenisey Gulf in the region with the highest methane concentrations in the southern part of the Kara Sea that reflects permafrost degradation under the influence of river flow. Further study of the region would help to understand the factors influencing frenulate distributions and improve our knowledge of their biodiversity.
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12
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Georgieva MN, Taboada S, Riesgo A, Díez-Vives C, De Leo FC, Jeffreys RM, Copley JT, Little CTS, Ríos P, Cristobo J, Hestetun JT, Glover AG. Evidence of Vent-Adaptation in Sponges Living at the Periphery of Hydrothermal Vent Environments: Ecological and Evolutionary Implications. Front Microbiol 2020; 11:1636. [PMID: 32793148 PMCID: PMC7393317 DOI: 10.3389/fmicb.2020.01636] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/23/2020] [Indexed: 01/04/2023] Open
Abstract
The peripheral areas of deep-sea hydrothermal vents are often inhabited by an assemblage of animals distinct to those living close to vent chimneys. For many such taxa, it is considered that peak abundances in the vent periphery relate to the availability of hard substrate as well as the increased concentrations of organic matter generated at vents, compared to background areas. However, the peripheries of vents are less well-studied than the assemblages of vent-endemic taxa, and the mechanisms through which peripheral fauna may benefit from vent environments are generally unknown. Understanding this is crucial for evaluating the sphere of influence of hydrothermal vents and managing the impacts of future human activity within these environments, as well as offering insights into the processes of metazoan adaptation to vents. In this study, we explored the evolutionary histories, microbiomes and nutritional sources of two distantly-related sponge types living at the periphery of active hydrothermal vents in two different geological settings (Cladorhiza from the E2 vent site on the East Scotia Ridge, Southern Ocean, and Spinularia from the Endeavour vent site on the Juan de Fuca Ridge, North-East Pacific) to examine their relationship to nearby venting. Our results uncovered a close sister relationship between the majority of our E2 Cladorhiza specimens and the species Cladorhiza methanophila, known to harbor and obtain nutrition from methanotrophic symbionts at cold seeps. Our microbiome analyses demonstrated that both E2 Cladorhiza and Endeavour Spinularia sp. are associated with putative chemosynthetic Gammaproteobacteria, including Thioglobaceae (present in both sponge types) and Methylomonaceae (present in Spinularia sp.). These bacteria are closely related to chemoautotrophic symbionts of bathymodiolin mussels. Both vent-peripheral sponges demonstrate carbon and nitrogen isotopic signatures consistent with contributions to nutrition from chemosynthesis. This study expands the number of known associations between metazoans and potentially chemosynthetic Gammaproteobacteria, indicating that they can be incredibly widespread and also occur away from the immediate vicinity of chemosynthetic environments in the vent-periphery, where these sponges may be adapted to benefit from dispersed vent fluids.
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Affiliation(s)
| | - Sergi Taboada
- Life Sciences Department, Natural History Museum, London, United Kingdom
- Departamento de Biología (Zoología), Universidad Autónoma de Madrid, Madrid, Spain
- Departamento de Zoología y Antropología Física, Universidad de Alcalá, Madrid, Spain
| | - Ana Riesgo
- Life Sciences Department, Natural History Museum, London, United Kingdom
| | | | - Fabio C. De Leo
- Ocean Networks Canada, University of Victoria, Victoria, BC, Canada
- Department of Biology, University of Victoria, Victoria, BC, Canada
| | - Rachel M. Jeffreys
- School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Jonathan T. Copley
- School of Ocean and Earth Science, University of Southampton, Southampton, United Kingdom
| | - Crispin T. S. Little
- Life Sciences Department, Natural History Museum, London, United Kingdom
- School of Earth and Environment, University of Leeds, Leeds, United Kingdom
| | - Pilar Ríos
- Departamento de Zoología y Antropología Física, Universidad de Alcalá, Madrid, Spain
- Centro Oceanográfico de Santander, Instituto Español de Oceanografía, Santander, Spain
| | - Javier Cristobo
- Departamento de Zoología y Antropología Física, Universidad de Alcalá, Madrid, Spain
- Centro Oceanográfico de Gijón, Instituto Español de Oceanografía, Gijón, Spain
| | - Jon T. Hestetun
- NORCE Environment, Norwegian Research Centre (NORCE), Bergen, Norway
| | - Adrian G. Glover
- Life Sciences Department, Natural History Museum, London, United Kingdom
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13
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Guggolz T, Meißner K, Schwentner M, Dahlgren TG, Wiklund H, Bonifácio P, Brandt A. High diversity and pan-oceanic distribution of deep-sea polychaetes: Prionospio and Aurospio (Annelida: Spionidae) in the Atlantic and Pacific Ocean. ORG DIVERS EVOL 2020. [DOI: 10.1007/s13127-020-00430-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AbstractPrionospio Malmgren 1867 and Aurospio Maciolek 1981 (Annelida: Spionidae) are polychaete genera commonly found in the deep sea. Both genera belong to the Prionospio complex, whose members are known to have limited distinguishing characters. Morphological identification of specimens from the deep sea is challenging, as fragmentation and other damages are common during sampling. These issues impede investigations into the distribution patterns of these genera in the deep sea. In this study, we employ two molecular markers (16S rRNA and 18S) to study the diversity and the distribution patterns of Prionospio and Aurospio from the tropical North Atlantic, the Puerto Rico Trench and the central Pacific. Based on different molecular analyses (Automated Barcode Gap Discovery, GMYC, pairwise genetic distances, phylogenetics, haplotype networks), we were able to identify and differentiate 21 lineages (three lineages composed solely of GenBank entries) that represent putative species. Seven of these lineages exhibited pan-oceanic distributions (occurring in the Atlantic as well as the Pacific) in some cases even sharing identical 16S rRNA haplotypes in both oceans. Even the lineages found to be restricted to one of the oceans were distributed over large regional scales as for example across the Mid-Atlantic Ridge from the Caribbean to the eastern Atlantic (> 3389 km). Our results suggest that members of Prionospio and Aurospio may have the potential to disperse across large geographic distances, largely unaffected by topographic barriers and possibly even between oceans. Their high dispersal capacities are probably explained by their free-swimming long-lived planktonic larvae.
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14
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Linse K, Copley JT, Connelly DP, Larter RD, Pearce DA, Polunin NVC, Rogers AD, Chen C, Clarke A, Glover AG, Graham AGC, Huvenne VAI, Marsh L, Reid WDK, Roterman CN, Sweeting CJ, Zwirglmaier K, Tyler PA. Fauna of the Kemp Caldera and its upper bathyal hydrothermal vents (South Sandwich Arc, Antarctica). ROYAL SOCIETY OPEN SCIENCE 2019; 6:191501. [PMID: 31827872 PMCID: PMC6894572 DOI: 10.1098/rsos.191501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/23/2019] [Indexed: 05/24/2023]
Abstract
Faunal assemblages at hydrothermal vents associated with island-arc volcanism are less well known than those at vents on mid-ocean ridges and back-arc spreading centres. This study characterizes chemosynthetic biotopes at active hydrothermal vents discovered at the Kemp Caldera in the South Sandwich Arc. The caldera hosts sulfur and anhydrite vent chimneys in 1375-1487 m depth, which emit sulfide-rich fluids with temperatures up to 212°C, and the microbial community of water samples in the buoyant plume rising from the vents was dominated by sulfur-oxidizing Gammaproteobacteria. A total of 12 macro- and megafaunal taxa depending on hydrothermal activity were collected in these biotopes, of which seven species were known from the East Scotia Ridge (ESR) vents and three species from vents outside the Southern Ocean. Faunal assemblages were dominated by large vesicomyid clams, actinostolid anemones, Sericosura sea spiders and lepetodrilid and cocculinid limpets, but several taxa abundant at nearby ESR hydrothermal vents were rare such as the stalked barnacle Neolepas scotiaensis. Multivariate analysis of fauna at Kemp Caldera and vents in neighbouring areas indicated that the Kemp Caldera is most similar to vent fields in the previously established Southern Ocean vent biogeographic province, showing that the species composition at island-arc hydrothermal vents can be distinct from nearby seafloor-spreading systems. δ 13C and δ 15N isotope values of megafaunal species analysed from the Kemp Caldera were similar to those of the same or related species at other vent fields, but none of the fauna sampled at Kemp Caldera had δ 13C values, indicating nutritional dependence on Epsilonproteobacteria, unlike fauna at other island-arc hydrothermal vents.
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Affiliation(s)
- Katrin Linse
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Jonathan T. Copley
- Ocean and Earth Science, University of Southampton, Waterfront Campus, Southampton SO14 3ZH, UK
| | | | - Robert D. Larter
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - David A. Pearce
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Nick V. C. Polunin
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne NE1 7RU, UK
| | - Alex D. Rogers
- Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
| | - Chong Chen
- X-STAR, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Kanagawa Pref. Japan
| | - Andrew Clarke
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Adrian G. Glover
- Life Sciences Department, Natural History Museum, Cromwell Road, London SW7 5BD, UK
| | | | | | - Leigh Marsh
- Ocean and Earth Science, University of Southampton, Waterfront Campus, Southampton SO14 3ZH, UK
| | - William D. K. Reid
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne NE1 7RU, UK
| | - C. Nicolai Roterman
- Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
| | - Christopher J. Sweeting
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building, Newcastle upon Tyne NE1 7RU, UK
| | - Katrin Zwirglmaier
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Paul A. Tyler
- Ocean and Earth Science, University of Southampton, Waterfront Campus, Southampton SO14 3ZH, UK
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15
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Sen A, Duperron S, Hourdez S, Piquet B, Léger N, Gebruk A, Le Port AS, Svenning MM, Andersen AC. Cryptic frenulates are the dominant chemosymbiotrophic fauna at Arctic and high latitude Atlantic cold seeps. PLoS One 2018; 13:e0209273. [PMID: 30592732 PMCID: PMC6310283 DOI: 10.1371/journal.pone.0209273] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 12/03/2018] [Indexed: 12/02/2022] Open
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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Affiliation(s)
- Arunima Sen
- Centre for Arctic Gas Hydrate, Environment and Climate (CAGE), UiT The Arctic University of Norway, Tromsø, Norway
| | - Sébastien Duperron
- Sorbonne Université, UMR7208 (MNHN, CNRS, IRD, UCN, UA) Biologie des organismes et écosystèmes aquatiques (BOREA), Paris, France.,Muséum National d'Histoire Naturelle-UMR7245 (MNHN CNRS) Mécanismes de Communication et Adaptation des Micro-organismes (MCAM), Paris, France
| | - Stéphane Hourdez
- UMR7144 Sorbonne Université, CNRS-Equipe Adaptation et Biologie des Invertébrés Marins en Conditions Extrêmes (ABICE)-Station Biologique de Roscoff, Roscoff, France
| | - Bérénice Piquet
- Sorbonne Université, UMR7208 (MNHN, CNRS, IRD, UCN, UA) Biologie des organismes et écosystèmes aquatiques (BOREA), Paris, France.,UMR7144 Sorbonne Université, CNRS-Equipe Adaptation et Biologie des Invertébrés Marins en Conditions Extrêmes (ABICE)-Station Biologique de Roscoff, Roscoff, France
| | - Nelly Léger
- Sorbonne Université, UMR7208 (MNHN, CNRS, IRD, UCN, UA) Biologie des organismes et écosystèmes aquatiques (BOREA), Paris, France
| | | | - Anne-Sophie Le Port
- UMR7144 Sorbonne Université, CNRS-Equipe Adaptation et Biologie des Invertébrés Marins en Conditions Extrêmes (ABICE)-Station Biologique de Roscoff, Roscoff, France
| | - Mette Marianne Svenning
- Centre for Arctic Gas Hydrate, Environment and Climate (CAGE), UiT The Arctic University of Norway, Tromsø, Norway.,Department of Arctic Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ann C Andersen
- UMR7144 Sorbonne Université, CNRS-Equipe Adaptation et Biologie des Invertébrés Marins en Conditions Extrêmes (ABICE)-Station Biologique de Roscoff, Roscoff, France
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16
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Southernmost records of Escarpia spicata and Lamellibrachia barhami (Annelida: Siboglinidae) confirmed with DNA obtained from dried tubes collected from undiscovered reducing environments in northern Chile. PLoS One 2018; 13:e0204959. [PMID: 30300424 PMCID: PMC6177156 DOI: 10.1371/journal.pone.0204959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/15/2018] [Indexed: 11/19/2022] Open
Abstract
Deep-sea fishing bycatch enables collection of samples of rare species that are not easily accessible, for research purposes. However, these specimens are often degraded, losing diagnostic morphological characteristics. Several tubes of vestimentiferans, conspicuous annelids endemic to chemosynthetic environments, were obtained from a single batch of deep-sea fishing bycatch at depths of around 1,500 m off Huasco, northern Chile, as part of an ongoing study examining bycatch species. DNA sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene and an intron region within the hemoglobin subunit B2 (hbB2i) were successfully determined using vestimentiferans’ dried-up tubes and their degraded inner tissue. Molecular phylogenetic analyses based on DNA sequence identified the samples as Escarpia spicata Jones, 1985, and Lamellibrachia barhami Webb, 1969. These are the southernmost records, vastly extending the geographical ranges of both species from Santa Catalina Island, California to northern Chile for E. spicata (over 8,000 km), and from Vancouver Island Margin to northern Chile for L. barhami (over 10,000 km). We also determined a 16S rRNA sequence of symbiotic bacteria of L. barhami. The sequence of the bacteria is the same as that of E. laminata, Lamellibrachia sp. 1, and Lamellibrachia sp.2 known from the Gulf of Mexico. The present study provides sound evidence forthe presence of reducing environments along the continental margin of northern Chile.
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17
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Eilertsen MH, Georgieva MN, Kongsrud JA, Linse K, Wiklund H, Glover AG, Rapp HT. Genetic connectivity from the Arctic to the Antarctic: Sclerolinum contortum and Nicomache lokii (Annelida) are both widespread in reducing environments. Sci Rep 2018; 8:4810. [PMID: 29556042 PMCID: PMC5859262 DOI: 10.1038/s41598-018-23076-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 03/06/2018] [Indexed: 11/23/2022] Open
Abstract
The paradigm of large geographic ranges in the deep sea has been challenged by genetic studies, which often reveal putatively widespread species to be several taxa with more restricted ranges. Recently, a phylogeographic study revealed that the tubeworm Sclerolinum contortum (Siboglinidae) inhabits vents and seeps from the Arctic to the Antarctic. Here, we further test the conspecificity of the same populations of S. contortum with additional mitochondrial and nuclear markers. We also investigate the genetic connectivity of another species with putatively the same wide geographic range - Nicomache lokii (Maldanidae). Our results support the present range of S. contortum, and the range of N. lokii is extended from vents and seeps in the Nordic Seas to mud volcanoes in the Barbados Trench and Antarctic vents. Sclerolinum contortum shows more pronounced geographic structure than N. lokii, but whether this is due to different dispersal capacities or reflects the geographic isolation of the sampled localities is unclear. Two distinct mitochondrial lineages of N. lokii are present in the Antarctic, which may result from two independent colonization events. The environmental conditions inhabited by the two species and implications for their distinct habitat preference is discussed.
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Affiliation(s)
- Mari H Eilertsen
- Department of Biological Sciences, University of Bergen, PO Box 7800, N-5020, Bergen, Norway. .,K.G. Jebsen Centre for Deep-Sea Research, University of Bergen, PO Box 7803, N-5020, Bergen, Norway.
| | - Magdalena N Georgieva
- Life Sciences Department, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Jon A Kongsrud
- Department of Natural History, University Museum of Bergen, PO Box 7800, N-5020, Bergen, Norway
| | - Katrin Linse
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
| | - Helena Wiklund
- Life Sciences Department, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Adrian G Glover
- Life Sciences Department, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Hans T Rapp
- Department of Biological Sciences, University of Bergen, PO Box 7800, N-5020, Bergen, Norway.,K.G. Jebsen Centre for Deep-Sea Research, University of Bergen, PO Box 7803, N-5020, Bergen, Norway.,Uni Research, Uni Environment, PO Box 7810, N-5020, Bergen, Norway
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18
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Hutchings P, Kupriyanova E. Cosmopolitan polychaetes – fact or fiction? Personal and historical perspectives. INVERTEBR SYST 2018. [DOI: 10.1071/is17035] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In the biogeographical and taxonomical literature before the 1980s there was a wide perception that widespread, often referred to as ‘cosmopolitan’, species were very common among polychaetes. Here we discuss the origins of this perception, how it became challenged, and our current understanding of marine annelid distributions today. We comment on the presence of widely distributed species in the deep sea and on artificially extended ranges of invasive species that have been dispersed by anthropogenic means. We also suggest the measures needed to revolve the status of species with reported cosmopolitan distributions and stress the value of museum collections and vouchers to be associated with DNA sequences in resolving species distributions.
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19
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Hydrothermal activity, functional diversity and chemoautotrophy are major drivers of seafloor carbon cycling. Sci Rep 2017; 7:12025. [PMID: 28931949 PMCID: PMC5607325 DOI: 10.1038/s41598-017-12291-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 09/07/2017] [Indexed: 11/09/2022] Open
Abstract
Hydrothermal vents are highly dynamic ecosystems and are unusually energy rich in the deep-sea. In situ hydrothermal-based productivity combined with sinking photosynthetic organic matter in a soft-sediment setting creates geochemically diverse environments, which remain poorly studied. Here, we use comprehensive set of new and existing field observations to develop a quantitative ecosystem model of a deep-sea chemosynthetic ecosystem from the most southerly hydrothermal vent system known. We find evidence of chemosynthetic production supplementing the metazoan food web both at vent sites and elsewhere in the Bransfield Strait. Endosymbiont-bearing fauna were very important in supporting the transfer of chemosynthetic carbon into the food web, particularly to higher trophic levels. Chemosynthetic production occurred at all sites to varying degrees but was generally only a small component of the total organic matter inputs to the food web, even in the most hydrothermally active areas, owing in part to a low and patchy density of vent-endemic fauna. Differences between relative abundance of faunal functional groups, resulting from environmental variability, were clear drivers of differences in biogeochemical cycling and resulted in substantially different carbon processing patterns between habitats.
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20
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Brasier MJ, Wiklund H, Neal L, Jeffreys R, Linse K, Ruhl H, Glover AG. DNA barcoding uncovers cryptic diversity in 50% of deep-sea Antarctic polychaetes. ROYAL SOCIETY OPEN SCIENCE 2016; 3:160432. [PMID: 28018624 PMCID: PMC5180122 DOI: 10.1098/rsos.160432] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 09/30/2016] [Indexed: 05/20/2023]
Abstract
The Antarctic marine environment is a diverse ecosystem currently experiencing some of the fastest rates of climatic change. The documentation and management of these changes requires accurate estimates of species diversity. Recently, there has been an increased recognition of the abundance and importance of cryptic species, i.e. those that are morphologically identical but genetically distinct. This article presents the largest genetic investigation into the prevalence of cryptic polychaete species within the deep Antarctic benthos to date. We uncover cryptic diversity in 50% of the 15 morphospecies targeted through the comparison of mitochondrial DNA sequences, as well as 10 previously overlooked morphospecies, increasing the total species richness in the sample by 233%. Our ability to describe universal rules for the detection of cryptic species within polychaetes, or normalization to expected number of species based on genetic data is prevented by taxon-specific differences in phylogenetic outputs and genetic variation between and within potential cryptic species. These data provide the foundation for biogeographic and functional analysis that will provide insight into the drivers of species diversity and its role in ecosystem function.
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Affiliation(s)
- Madeleine J. Brasier
- School of Environmental Science, University of Liverpool, L69 3BX, Liverpool, UK
| | - Helena Wiklund
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
| | - Lenka Neal
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
| | - Rachel Jeffreys
- School of Environmental Science, University of Liverpool, L69 3BX, Liverpool, UK
| | - Katrin Linse
- BioSciences, British Antarctic Survey, Cambridge CB3 OET, UK
| | - Henry Ruhl
- National Oceanography Centre, University of Southampton, Waterfront Campus, Southampton SO14 3ZH, UK
| | - Adrian G. Glover
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK
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21
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Paxton H, Wiklund H, Alexander F, Taboada S. Is the Antarctic Ophryotrocha orensanzi (Annelida: Dorvilleidae) a circumpolar non-specialized opportunist? SYST BIODIVERS 2016. [DOI: 10.1080/14772000.2016.1218371] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hannelore Paxton
- Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia
- Australian Museum Research Institute, 1 William Street, Sydney, NSW 2010, Australia
| | - Helena Wiklund
- Department of Life Sciences, The Natural History Museum, Cromwell Rd, London SW7 5BD, UK
| | - Frances Alexander
- Marine Ecology Research Centre, Southern Cross University, Lismore, NSW 2480, Australia
- Australian Antarctic Division, Kingston, Tasmania 7050, Australia
| | - Sergi Taboada
- Department of Life Sciences, The Natural History Museum, Cromwell Rd, London SW7 5BD, UK
- Facultad de Biología, Departmento de Biología Animal, Universidad de Barcelona, Avda. Diagonal 643, 08028 Barcelona, Spain
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22
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Havermans C. Have we so far only seen the tip of the iceberg? Exploring species diversity and distribution of the giant amphipod Eurythenes. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/14888386.2016.1172257] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Charlotte Havermans
- OD Nature, Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Marine Zoology, BreMarE – Bremen Marine Ecology, University of Bremen, Bremen, Germany
- Functional Ecology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
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