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  • 2010-2014  (38)
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  • 1
    Publication Date: 2013-01-01
    Description: Reconciliation of paleontological and molecular phylogenetic evidence holds great promise for a better understanding of the temporal succession of cladogenesis and character evolution, especially for taxa with a fragmentary fossil record and uncertain classification. In zoology, studies of this kind have largely been restricted to Bilateria. Hexactinellids (glass sponges) readily lend themselves to test such an approach for early-branching (non-bilaterian) animals: they have a long and rich fossil record, but for certain taxa paleontological evidence is still scarce or ambiguous. Furthermore, there is a lack of consensus for taxonomic interpretations, and discrepancies exist between neontological and paleontological classification systems. Using conservative fossil calibration constraints and the largest molecular phylogenetic data set assembled for this group, we infer divergence times of crown-group Hexactinellida in a Bayesian relaxed molecular clock framework. With some notable exceptions, our results are largely congruent with interpretations of the hexactinellid fossil record, but also indicate long periods of undocumented evolution for several groups. This study illustrates the potential of an integrated molecular/paleobiological approach to reconstructing the evolution of challenging groups of organisms.
    Print ISSN: 0094-8373
    Electronic ISSN: 0094-8373
    Topics: Geosciences
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  • 2
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/zip
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  • 3
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    Senckenberg Gesellschaft für Naturforschung
    In:  EPIC3Senckenberg Natur Forschung Museum Das Senckenberg-Wissenschaftsmagazin, Senckenberg Gesellschaft für Naturforschung, 143(9/10), pp. 282-289
    Publication Date: 2019-07-17
    Description: Die obere Wasserschicht des Südpolarmeers ist reich an Pflanzennährstoffen wie Nitrat und Phosphat, trotzdem ist die biologische Produktion in großen Teilen des Südozeans relativ gering, denn es mangelt am Spurennährstoff Eisen. Die Tiere am Meeresboden sind auf Nahrung in Form von organischen Partikeln angewiesen, die von oben in die Tiefe absinken. Welche Nahrung und wie viel davon steht den Tiefseeorganismen hier überhaupt zur Verfügung? Welche Tiere – insbesondere welche Schwämme – kommen mit diesen Bedingungen gut zurecht? Darüber sollte eine Polarstern-Expedition Aufschluss geben
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
    Format: application/pdf
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  • 4
    Publication Date: 2020-08-15
    Description: In the Southern Ocean, that is areas south of the Polar Front, long-term oceanographic cooling, geographic separation, development of isolating current and wind systems, tectonic drift and fluctuation of ice sheets amongst others have resulted in a highly endemic benthic fauna, which is generally adapted to the long-lasting, relatively stable environmental conditions. The Southern Ocean benthic ecosystem has been subject to minimal direct anthropogenic impact (compared to elsewhere) and thus presents unique opportunities to study biodiversity and its responses to environmental change. Since the beginning of the century, research under the Census of Marine Life and International Polar Year initiatives, as well as Scientific Committee of Antarctic Research biology programmes, have considerably advanced our understanding of the Southern Ocean benthos. In this paper, we evaluate recent progress in Southern Ocean benthic research and identify priorities for future research. Intense efforts to sample and describe the benthic fauna, coupled with coordination of information in global databases, have greatly enhanced understanding of the biodiversity and biogeography of the region. Some habitats, such as chemosynthetic systems, have been sampled for the first time, while application of new technologies and methods are yielding new insights into ecosystem structure and function. These advances have also highlighted important research gaps, notably the likely consequences of climate change. In a time of potentially pivotal environmental change, one of the greatest challenges is to balance conservation with increasing demands on the Southern Ocean’s natural resources and services. In this context, the characterization of Southern Ocean biodiversity is an urgent priority requiring timely and accurate species identifications, application of standardized sampling and reporting procedures, as well as cooperation between disciplines and nations.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Cell Press
    In:  EPIC3Current Biology, Cell Press, 23(14), pp. 1330-1334, ISSN: 09609822
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
    Publication Date: 2023-03-17
    Keywords: ANT-XXIII/8; AWI_PhyOce; Calculated; Computed; Conductivity; CTD, Sea-Bird, SBE 911plus [SN: 0561]; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Drake Passage; Dundee Island; Elevation of event; Event label; Latitude of event; Location of event; Longitude of event; Number of observations; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS69; PS69/602-1; PS69/603-1; PS69/605-2; PS69/609-2; PS69/614-2; PS69/619-2; PS69/622-2; PS69/624-2; PS69/629-2; PS69/631-2; PS69/634-2; PS69/638-2; PS69/643-2; PS69/648-2; PS69/651-2; PS69/654-2; PS69/656-2; PS69/659-2; PS69/661-1; PS69/664-2; PS69/667-2; PS69/671-2; PS69/674-2; PS69/675-1; PS69/680-2; PS69/682-2; PS69/686-2; PS69/689-2; PS69/691-2; PS69/693-2; PS69/695-2; PS69/697-2; PS69/699-2; PS69/700-5; PS69/702-1; PS69/703-5; PS69/709-1; PS69/709-2; PS69/714-2; PS69/719-1; PS69/722-5; PS69/725-3; PS69/726-5; PS69/728-3; Salinity; Scotia Sea, southwest Atlantic; Snow Hill Island; South Atlantic Ocean; Temperature, water; Temperature, water, potential; Weddell Sea; Weddell Sea, Larsen-A; Weddell Sea, Larsen-B
    Type: Dataset
    Format: text/tab-separated-values, 106133 data points
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  • 7
    Publication Date: 2023-08-02
    Keywords: Abatus bidens; Abatus cavernosus; Abatus curvidens; Abyssocladia sp.; Acanthonotozomoides sp.; Acodontaster capitatus; Actiniaria sp.; Actinostolidae sp.; Adacnarca nitens; Adamussium colbecki; Adeliella sp.; Admete sp.; Agalophamus macroura; Agassiz Trawl; AGT; Alcyonidium sp.; Alexandrella dentata; Ammothea sp.; Ampelisca richardsoni; Amphicteis gunneri antarctica; Amphioplus sp.; Amphipneustes lorioli; Amphitrite cf. kerguelensis; Anatoma euglyptus; Anoxycalyx ijimai; Anoxycalyx joubini; Antarctinoe ferox; Antarctinoe spicoides; Antarcturidae; Antarcturus horridus; Antedonidae sp.; Anthomedusae sp.; ANT-XXIII/8; Aplacophora spp.; Area/locality; Aristias antarcticus; Arntzia gracilis; Artedidraco orianae; Artedidraco skottsbergi; Asellota sp.; Astrotoma agassizii; Austrolaeniella antarctica; Austrolaeniella hastulifera; Austropallene sp.; Axinella sp.; Bathyarca sinuata; Bathybiaster loripes; Bathycrinus australis; Bathydoris clavigera; Bathydorus sp.; Bathydraco antarcticus; Bottom trawl; Brisinga distincta; Bryozoa sp.; BT; Buccinulidae sp.; Byblis securiger; Caberea darwini; Calliotropis sp.; Callochiton gaussi; Camptoplites sp.; Capnea georgiana; Capulus subcompressus; Caryophyllia sp.; Caulophacus sp.; Cephalodiscus sp.; Ceratoserolis trilobitoides; Chaenodraco wilsoni; Chinchyra sp.; Chionodraco myersi; Chorismus antarcticus; Cirripedia spp.; Clathrina primordalis, juvenile; Clavadoce sp.; Clavularia sp.; Clymenura sp.; Cnidaria species; Colossendeis sp.; Crossaster penicillatus; Cuenotaster involutus; Cumacea spp.; Cuspidoserolis spp.; Cyamiomactra robusta; Cyclostomata sp.; Cygnodraco mawsoni; Cystocrepis sp.; Dacodraco hunteri; Dacrydium sp.; Date/Time of event; Date/Time of event 2; Demospongiae sp.; DEPTH, sediment/rock; Desmacella sp.; Diplasterias brandti; Diplasterias brucei; Dolichiscus sp.; Dundee Island; Echinaster smithi; Echiniphimediella echinata; Echinisis sp.; Echinodermata and Hemichordata species; Elevation of event; Elevation of event 2; Endeis sp.; Epimeria georgiana; Epimeria macrodonta; Epimeria pulchra; Epimeria sp.; Errina laterorifa; Errina sp.; Estimated; Eulagisca gigantea; Eulalia sp.; Eusiroid sp.; Eusirus group antarcticus; Eusirus group perdentatus; Event label; Falsimargarita gemma; Fannyella rossii; Fannyella sp.; Fasciculipora ramosa; Flabelligera mundata; Flabellum impensum; Flustridae sp.; Freyella fragillisima; Fungicyathus marenzelleri; Gilibelemnon octodentatum; Glyptonotus antarcticus; Gnathiphimedia sexdentata; Gobionotothen gibberifrons; Guittara fimbriata; Gymnodraco acuticeps; Halichondria sp.; Haplocheira sp.; Harmothoe antarctica; Harmothoe fuligineum; Harmothoe fullo; Harmothoe magellanica; Haul length; Henricia obesa; Henricia pagenstecheri; Heterodonta sp.; Hippasteria falklandica; Hornera sp.; Hymenaster perspicuus; Iantopsis sp.; Inflatella belli; Iophon radiatus; Iothia coppingeri; Iphimedella cyclogena; Iphimediella margueritei; Iphimediella rigida; Iphimediella serrata; Isodictya setifer; Isodictya sp.; Isosicyonis alba; Kerguelenatica bioperculata; Lamellaridae sp.; Latitude of event; Latitude of event 2; Lepidonototen larseni; Lepidonotothen nudifrons; Leptomedusae sp.; Leptychaster flexous; Liljeborgia chevreux; Liljeborgia georgiana; Liljeborgia polydeuces; Limatula similliana; Limatula sp.; Limopsis cf. marionensis; Limopsis lilliei; Limopsis sp.; Lissarca miliaris; Location of event; Longitude of event; Longitude of event 2; Lyonsiidae sp.; Lysasterias belgicae; Macroptychaster accrescens; Magarella spp.; Maldane sarsi; Malletia sabrina; Maxilliphimedia longipes; Method/Device of event; Mollusca, number of species; Monoculodes sp.; Mycale acerata; Mycillina sp.; Nacella spp.; Naticidae sp.; Nebalia sp.; Neobuccinum eatoni; Neoleprea streptochaeta; Neopagetopsis ionah; Nicon ehlersis; Notasterias armata; Notasterias bongraini; Notocidaris mortenseni; Notocrangon antarcticus; Notoplites sp.; Nymphon sp.; Odontaster meridionalis; Odontaster penicillatus; Ophiacantha sp.; Ophionotus sp.; Ophiosparte sp.; Ophiuroidea sp.; Ophiurolepis sp.; Orchomenella acanthurus; Orchomenella sp.; Paeledone albimaculata; Pagetopsis macropterus; Pagetopsis maculatus; Pagothenia borchgrevinki; Pallenopsis sp.; Pantopoda and Crustacea species; Paraceradocus gibber; Paralophaster antarcticus; Paralophaster lorioli; Pareledone aequipapillae; Pareledone turqueti; Parepimeria irregularis; Pentanymphon sp.; Perkinsiana sp.; Perknaster aurantiacus; Perknaster aurorae; Philobry subleavis; Phoxocephalidae; Phyllodoce sp.; Pisces species; Pista mirabilis; Pleuragramma antarcticum; Podocerus cf. septemcarinatus; Polarstern; Polychaeta sp.; Polycheira sp.; Polyeunoa leavis; Polymastia invaginata, juvenile; Pontiothauma ergata; Porania antarctica; Porifera species; Pourtalesia debilis; Primnoella sp.; Primnoisis sp.; Probuccinum tenerum; Promachocrinus kerguelensis; Propeleda longicaudata; PS69; PS69/700-2; PS69/700-4; PS69/702-9; PS69/703-2; PS69/703-3; PS69/710-5; PS69/710-6; PS69/711-7; PS69/715-1; PS69/716-1; PS69/721-2; PS69/722-4; PS69/725-6; PS69/726-4; PS69/728-2; Pseuderichtonius sp.; Pseudharpinia sp.; Pteraster stellifer; Pycnogonum sp.; Remaster gourdoni; Reteporella sp.; Rhizaxinella sp.; Rhopiella hirsuta; Rhynchocidaris triplopora; Rossella nuda; Rossella racovitzae; Rossella sp.; Seguenzia antarctica; Serpula narconensis; Sertularidae sp.; Sinuber scluptum; Siphonophora sp.; Snow Hill Island; Stegopanoplea joubini; Stenothoidae; Stephanthus antarcticus; Sterechinus antarcticus; Sterechinus neumayeri; Stilaplex polaris; Stomphia selaginella; Subcuspidaria kerguelensis; Syrrhoe sp.; Tedania tantula; Terebella sp.; Terebellides stroemii kerguelensis; Tethopsis longispina; Tetilla sp.; Thelepus sp.; Thouarella sp.; Thracia meridionales; Torellia sp.; Trematomus bernacchii; Trematomus eulepidotus; Trematomus hansoni; Trematomus loennbergii; Trematomus penelli; Trematomus scotti; Tripylus abatoides; Tritonia antarctica; Tritoniella belli; Trophon drygalski; Trophon spp., juvenile; Turridae sp.; Umbellula lindhali; Urothoe sp.; Waldeckia obesa; Weddell Sea; Weddell Sea, Larsen-A; Weddell Sea, Larsen-B
    Type: Dataset
    Format: text/tab-separated-values, 3531 data points
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  • 8
    Publication Date: 2023-07-10
    Keywords: Actiniaria; Actiniaria sp.; Actiniaria spp.; Adamussium colbeckii; Ainigmaptilon antarcticus; Alcyonidae sp.; Alcyonidium sp.; Antarctomysis spp.; Antarcturidae; Antedonidae; ANT-XXIII/8; Area; Area/locality; Artemisina sp.; Ascidiacea sp.; Ascidiacea spp.; Asteroidea sp.; Asteroidea spp.; Astrotoma agassizii; Bathycrinus australis; Benthos; Brisinga cf. distincta; Bryozoa; Bryozoa sp.; Bryozoa spp.; cf. Aplidium sp.; cf. Distaplia cylindrica; cf. Isosicyonis spp.; cf. Lageneschara lyrulata; cf. Lycrocteis flavopallidus; cf. Molgula pedunculata; cf. Porania antarctica; cf. Pyura bouvetensis; Cnemidocarpa verrucosa; Corella eumyota; Counting; Date/Time of event; Date/Time of event 2; Demospongia sp.; Dendrochirotida sp.; Dendrochirotida spp.; DEPTH, sediment/rock; Dumetocrinus antarcticus; Echiurida sp.; Edwardsiidae sp.; Elasipoda sp.; Elpidia glacialis; Errina laterorifa; Euphausia spp.; Event label; Fannyella rossii; Flabelligeridae; Flabellum sp.; Flustridae; Freyella fragillisima; Gastropoda spp.; Gorgonaria; Gorgonaria spp.; Hexactinellida spp., fractionated; Hydrozoa sp., medusa; Iophon radiatus; Irregularia spp.; Isodictya sp.; Kirkpatrickia variolosa; Latitude of event; Latitude of event 2; Longitude of event; Longitude of event 2; Lysasterias; Marseniopsis mollis; Melicerita obliqua; Monocaulus microrhiza; Monocaulus parvula; Myxilla sp.; Nemertini sp.; Newnesia antarctica; Notocidaris mortensi; Notocrangon antarcticus; Nudibranchia spp.; Ophiuroidea sp.; Ophiuroidea spp.; Oswaldella sp.; Peniagone sp.; Perkinsiana sp.; Persistent Identifier; Pisces; Pisces spp.; Pista spinifera; Polarstern; Polychaeta spp.; Polyclinidae sp.; Polymastia isidis; Polynoidea sp.; Polysyncraton sp.; Porifera; Porifera spp.; Primnoella spp.; Primnosis sp.; Protelpidia murrayi; PS69; PS69/699-1; PS69/702-5; PS69/703-1; PS69/706-1; PS69/706-2; PS69/710-1; PS69/714-1; PS69/717-1; PS69/718-8; PS69/720-2; PS69/722-1; PS69/724-1; PS69/725-1; PS69/726-2; PS69/726-3; PS69/727-1; PS69/728-1; Pseudostichopus mollis; Psolidae; Psolus charcoti; Pycnogonida spp.; Remote operated vehicle CHEROKEE; Remote operated vehicle SPRINT 103; Rhodalia miranda; ROVC; ROVS; Serolidae; Serpula sp.; Sterechinus spp.; Stylocordyla borealis oblong; Stylocordyla borealis spheric; Synascidiacea; Synascidiacea spp.; Synoicum sp.; Taxa analyzed; Tetilla sp.; Thouarella; Umbellula sp.; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 9240 data points
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  • 9
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    PANGAEA
    In:  Supplement to: Gutt, Julian; Barratt, Iain; Domack, Eugene W; d'Udekem d'Acoz, Cédric; Dimmler, Werner; Grémare, Antoine; Heilmayer, Olaf; Isla, Enrique; Janussen, Dorte; Jorgensen, Elaina; Kock, Karl-Hermann; Lehnert, Linn Sophia; López-González, Pablo José; Langner, Stephanie; Linse, Katrin; Manjón-Cabeza, Maria Eugenia; Meißner, Meike; Montiel, Américo; Raes, Maarten; Robert, Henri; Rose, Armin; Schepisi, Elisabet Sañé; Saucède, Thomas; Scheidat, Meike; Schenke, Hans Werner; Seiler, Jan; Smith, Craig (2011): Biodiversity change after climate-induced ice-shelf collapse in the Antarctic. Deep Sea Research Part II: Topical Studies in Oceanography, 58(1-2), 74-83, https://doi.org/10.1016/j.dsr2.2010.05.024
    Publication Date: 2024-02-01
    Description: The marine ecosystem on the eastern shelf of the Antarctic Peninsula was surveyed 5 and 12 years after the climate-induced collapse of the Larsen A and B ice shelves. An impoverished benthic fauna was discovered, that included deep-sea species presumed to be remnants from ice-covered conditions. The current structure of various ecosystem components appears to result from extremely different response rates to the change from an oligotrophic sub-ice-shelf ecosystem to a productive shelf ecosystem. Meiobenthic communities remained impoverished only inside the embayments. On local scales, macro- and mega-epibenthic diversity was generally low, with pioneer species and typical Antarctic megabenthic shelf species interspersed. Antarctic Minke whales and seals utilised the Larsen A/B area to feed on presumably newly established krill and pelagic fish biomass. Ecosystem impacts also extended well beyond the zone of ice-shelf collapse, with areas of high benthic disturbance resulting from scour by icebergs discharged from the Larsen embayments.
    Keywords: Agassiz Trawl; AGT; ANT-XXIII/8; Bottom trawl; BT; CAML; Census of Antarctic Marine Life; CT; CTD/Rosette; CTD-RO; Drake Passage; Dundee Island; EBA; Evolution and Biodiversity in the Antarctic; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS69; PS69/602-1; PS69/603-1; PS69/605-2; PS69/609-2; PS69/614-2; PS69/619-2; PS69/622-2; PS69/624-2; PS69/629-2; PS69/631-2; PS69/634-2; PS69/638-2; PS69/643-2; PS69/648-2; PS69/651-2; PS69/654-2; PS69/656-2; PS69/659-2; PS69/661-1; PS69/664-2; PS69/667-2; PS69/671-2; PS69/674-2; PS69/675-1; PS69/680-2; PS69/682-2; PS69/686-2; PS69/689-2; PS69/691-2; PS69/693-2; PS69/695-2; PS69/697-2; PS69/699-1; PS69/699-2; PS69/700-2; PS69/700-4; PS69/700-5; PS69/702-1; PS69/702-5; PS69/702-9; PS69/703-1; PS69/703-2; PS69/703-3; PS69/703-5; PS69/706-1; PS69/706-2; PS69/709-1; PS69/709-2; PS69/710-1; PS69/710-5; PS69/710-6; PS69/711-7; PS69/714-1; PS69/714-2; PS69/715-1; PS69/716-1; PS69/717-1; PS69/718-8; PS69/719-1; PS69/720-2; PS69/721-2; PS69/722-1; PS69/722-4; PS69/722-5; PS69/724-1; PS69/725-1; PS69/725-3; PS69/725-6; PS69/726-2; PS69/726-3; PS69/726-4; PS69/726-5; PS69/727-1; PS69/728-1; PS69/728-2; PS69/728-3; PS69/8-track; Remote operated vehicle CHEROKEE; Remote operated vehicle SPRINT 103; ROVC; ROVS; Scotia Sea, southwest Atlantic; Snow Hill Island; South Atlantic Ocean; SPP1158; Underway cruise track measurements; Weddell Sea; Weddell Sea, Larsen-A; Weddell Sea, Larsen-B
    Type: Dataset
    Format: application/zip, 38 datasets
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  • 10
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    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Publication Date: 2024-03-01
    Keywords: ANT-XXVII/3; AWI_BPP; Bentho-Pelagic Processes @ AWI; DATE/TIME; Date/time end; Date/time start; File name; File size; Polarstern; PS77; PS77/253-1; Remote operated vehicle Sperre SubFighter 7500 DC; ROVSP; Uniform resource locator/link to movie; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 138 data points
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