Ändra sökning
Avgränsa sökresultatet
1 - 22 av 22
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Träffar per sida
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
Markera
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1. Klug, Christian
    et al.
    Pohle, Alexander
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Kröger, Björn
    A fossilized marble run: the peculiar taphonomy of Ordovician diploporitan blastozoans from Sweden2018Ingår i: Swiss Journal of Geosciences, ISSN 1661-8726, E-ISSN 1661-8734, Vol. 137, s. 405-411Artikel i tidskrift (Refereegranskat)
  • 2.
    Hybertsen, Frida
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Kiel, Steffen
    A middle Eocene seep deposit with silicified fauna from the Humptulips Formation in western Washington State, USA2018Ingår i: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 63, nr 4, s. 751-768Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Carbonate blocks with silicified fossils were recovered from a newly recognized cold seep deposit, the Satsop  Weatherwax site, in the basal Humptulips Formation, along the West Fork of Satsop River in Washington State, USA. The petrography and the stable carbon isotope signature of the carbonate, with values as low as -43.5‰, indicate that these carbonate blocks formed at an ancient methane seep. The fossils recovered from this block include five vesicomyid specimens, two fragments of a thyasirid, five specimens of the peltospirid Depressigyra, two specimens of the hyalogyrinid Hyalogyrina, 25 specimens of the neritimorph Thalassonerita eocenica, and three limpet specimens of two different species. Five species can be described as new: Nuculana acutilineata (Nuculanoidea), Desbruyeresia belliatus (Provannidae), Provanna fortis (Provannidae), Orbitestella dioi (Orbitestellidae), and Leptochiton terryiverseni (Polyplacophora). Other fossils recovered from this site are numerous serpulid tubes, echinoid spines, one brachiopod fragment and two neogastropods. Almost all species recovered belong to extant genera and the fauna has a modern character, but are different from species found in younger seeps in Washington State. This is the first record of an orbitestellid from an ancient cold seep deposit, the first fossil provannids from the Humptulips Formation, and the first fossil record of Desbruyeresia from North America.

  • 3.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Sami, Marco
    Taviani, Marco
    A serpulid-Anodontia-dominated methane-seep deposit from the Miocene of northern Italy2018Ingår i: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 63, s. 569-577Artikel i tidskrift (Refereegranskat)
  • 4.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Taviani, Marco
    Chemosymbiotic bivalves from the late Pliocene Stirone River hydrocarbon seep complex in northern Italy2018Ingår i: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 63, s. 557-568Artikel i tidskrift (Refereegranskat)
  • 5. Jenkins, Robert
    et al.
    Kaim, Andrzej
    Hikida, Yoshinori
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Four new species of the Jurassic to Cretaceous seep-restricted bivalve Caspiconcha and implications for the history of chemosynthetic communities2018Ingår i: Journal of Paleontology, ISSN 0022-3360, E-ISSN 1937-2337, Vol. 92, s. 596-610Artikel i tidskrift (Refereegranskat)
  • 6. Jakubowicz, Michal
    et al.
    Dopieralska, Jolanta
    Kaim, Andrzej
    Skupien, Petr
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Belka, Zdzislaw
    Nd isotope composition of seep carbonates: towards a new approach for constraining subseafloor fluid circulation at hydrocarbon seeps2018Ingår i: Chemical Geology, ISSN 0009-2541, E-ISSN 1872-6836, Vol. 503, s. 40-51Artikel i tidskrift (Refereegranskat)
  • 7. Feng, Dong
    et al.
    Peckmann, Jörn
    Li, Niu
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Qiu, Jian-Wen
    Liang, Qianyong
    Carney, robert
    Peng, Yongbo
    Tao, Jun
    Chen, Duofu
    The stable isotope fingerprint of chemosymbiosis in the shell organic matrix of seep-dwelling bivalves2018Ingår i: Chemical Geology, ISSN 0009-2541, E-ISSN 1872-6836, Vol. 479, s. 241-250Artikel i tidskrift (Refereegranskat)
  • 8.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Three new bivalve genera from Triassic hydrocarbon seep deposits in southern Turkey2018Ingår i: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 63, s. 221-234Artikel i tidskrift (Refereegranskat)
  • 9.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Taviani, Marco
    Institute of Marine Sciences, Italian National Research Council, Via Gobetti 101, 40129 Bologna, Italy.
    Chemosymbiotic bivalves from Miocene methane-seep carbonates in Italy2017Ingår i: Journal of Paleontology, ISSN 0022-3360, E-ISSN 1937-2337, Vol. 91, s. 444-466Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Eleven species of chemosymbiotic bivalves are reported from middle to late Miocene methane seep deposits (‘Calcari a Lucina’) in the Italian Apennines, including seven new species and one new genus. The new species are Bathymodiolus (s.l.) moroniae and B. (s.l.) miomediterraneus among the Bathymodiolinae and Archivesica aharoni, A. apenninica, A. strigarum, and ‘Pliocardia’ italica among the Vesicomyidae; specimens from the middle Miocene of Deruta are reported as Archivesica aff. aharoni. Samiolus iohannesbaptistae new genus new species is introduced for an unusual mytilid with a commarginally ribbed surface, which might be the first non-bathymodiolin mytilid obligate to the seep environment. The two large lucinid species from which these deposits derived their informal name ‘Calcari a Lucina’ are identified as Meganodontia hoernea (Des Moulins, 1868) and Lucinoma perusina (Sacco, 1901). With Chanellaxinus sp., we report the first thyasirid from a Neogene deep-water seep deposit in Italy and the first fossil occurrence of this genus.

  • 10.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Krystyn, Leopold
    Department of Palaeontology, Vienna University, 1090 Vienna, Austria.
    Demirtaş, Ferdi
    Department of Geological Engineering, Akdeniz University, 07058 Antalya, Turkey.
    Koşun, Erdal
    Department of Geological Engineering, Akdeniz University, 07058 Antalya, Turkey.
    Peckmann, Jörn
    Institute for Geology, Universität Hamburg, 20146 Hamburg, Germany.
    Late Triassic mollusk-dominated hydrocarbon-seep deposits from Turkey2017Ingår i: Geology, ISSN 0091-7613, E-ISSN 1943-2682, Vol. 44, s. 751-754Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Deep-sea hydrothermal vents and hydrocarbon seeps host unique ecosystems relying on geochemical energy rather than photosynthesis. Whereas the fossil and evolutionary history of these ecosystems is increasingly well known from the Cretaceous onward, their earlier history remains poorly understood and brachiopods are considered to have played a dominant role during the Paleozoic and Mesozoic. Here we report five new hydrocarbon-seep deposits from the Upper Triassic Kasımlar shales in southern Turkey. The pyritiferous seep limestones predominantly consist of 13C-depleted micrite with δ13C values as low as −10.4‰, and contain only sparse 13C-depleted rim cement (δ13C as low as −12.0‰), interpreted to result from the recrystallization of banded and botryoidal crystal aggregates of fibrous cement. The geologic ages of the studied seep deposits were determined as late Carnian and early Norian using conodonts. The associated fauna is dominated by modiomorphid and anomalodesmatan bivalves, and also includes a diversity of gastropods and the dimerelloid brachiopod Halorella. These faunal assemblages allow a comparison between seep faunas from the two major Triassic ocean basins—the present assemblages being from Tethys, and the only previously known examples being from eastern Panthalassa—and indicate that a cosmopolitan, seep-restricted fauna as in the present-day oceans has existed since the Late Triassic. With almost 20 species, the seep fauna of the Kasımlar shales approaches the diversity of Cretaceous to present-day seep faunas, further emphasizing the ecological similarity of seep faunas since the early Mesozoic. Our findings also highlight that brachiopods and bivalves had a more complex history of coexistence at seeps than currently appreciated.

  • 11.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Reply to Smith et al.: Network analysis reveals connectivity patterns in the continuum of reducing ecosystems2017Ingår i: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 284, artikel-id 20171644Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The role of whale falls in the connectivity among, and adaptation to, reducing ecosystems in the deep sea has been the matter of a long debate. Hydrothermal vents are the most extreme among the reducing habitats in terms of temperature, metal concentrations and in their geographical isolation, and it is hence thought that stepping stones are needed to reach them. As new types of reducing habitats are being discovered, they are now increasingly seen as a ‘continuum of reducing ecosystems’. Taking this concept seriously implies that any habitat type within this continuum could provide connectivity to any other. Thus rather than focusing just on whales, I will address the issues raised by Smith et al. in the context of the question ‘who provides connectivity with whom, and to which extent?’

  • 12.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Reply to Smith et al.: Network analysis reveals connectivity patterns in the continuum of reducing ecosystems2017Ingår i: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 284, artikel-id 20171644Artikel i tidskrift (Refereegranskat)
  • 13.
    Hryniewicz, Krzysztof
    et al.
    Institute of Paleobiology, Polish Academy of Sciences, Warszawa.
    Amano, Kazutaka
    Department of Geoscience, Joetsu University of Education, Niigata.
    Jenkins, Robert
    School of Natural System, College of Science and Engineering, Kanazawa University, Kanazawa City, Ishikawa .
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Thyasirid bivalves from Cretaceous and Paleogene cold seeps2017Ingår i: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 62, nr 4, s. 705-728Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We present a systematic study of thyasirid bivalves from Cretaceous to Oligocene seep carbonates worldwide. Eleven species of thyasirid bivalves are identified belonging to three genera: Conchocele, Maorithyas, and Thyasira. Two species are new: Maorithyas humptulipsensis sp. nov. from middle Eocene seep carbonates in the Humptulips Formation, Washington State, USA, and Conchocele kiritachiensis sp. nov. from the late Eocene seep deposit at Kiritachi, Hokkaido, Japan. Two new combinations are provided: Conchocele townsendi (White, 1890) from Maastrichtian strata of the James Ross Basin, Antarctica, and Maorithyas folgeri (Wagner and Schilling, 1923) from Oligocene rocks from California, USA. Three species are left in open nomenclature. We show that thyasirids have Mesozoic origins and appear at seeps before appearing in “normal” marine environments. These data are interpreted as a record of seep origination of thyasirids, and their subsequent dispersal to non-seep environments. We discuss the age of origination of thyasirids in the context of the origin of the modern deep sea fauna and conclude that thyasirids could have deep sea origins. This hypothesis is supported by the observed lack of influence of the Cretaceous and Paleogene Oceanic Anoxic Events on the main evolutionary lineages of the thyasirids, as seen in several other members of the deep sea fauna.

  • 14.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Using network analysis to trace the evolution of biogeography through geologic time: A case study2017Ingår i: Geology, ISSN 0091-7613, E-ISSN 1943-2682, Vol. 45, s. 711-714Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The biogeographic distribution of organisms has continuously changed through Earth’s

    history as plate tectonics changed the configurations of land masses, ocean basins, and climate

    zones. Yet, methods to investigate this dynamic through geologic time are limited. Here,

    network analysis is used to explore and to visualize the biogeographic history of brachiopods

    through the entire Triassic period. Many previously recognized biogeographic provinces are

    found, and in addition, the stratigraphic ranges of these provinces were identified. Provinces

    in the Tethys Ocean show the lowest degree of connectedness, which can be linked to higher

    evolutionary rates in this tropical ocean basin and possibly also to higher habitat heterogeneity.

    Stratigraphically, the Tethyan provinces are separated largely along the boundaries of

    the Early, Middle, and Late Triassic. This suggests that the events resulting in faunal changes

    among the index fossils used to define these sub-periods also affected the brachiopods. However,

    through the ~50 m.y. of the Triassic period, geographic proximity played a greater role

    in producing faunal similarity than proximity in geologic age. Thus network analysis is a

    viable tool to better understand the dynamic evolution of biogeography through geologic time.

  • 15.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    A biogeographic network reveals evolutionary links between deep sea hydrothermal vent and methane seep faunas2016Ingår i: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 283, artikel-id 20162337Artikel i tidskrift (Refereegranskat)
  • 16. Goedert, James L.
    et al.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    A lower jaw of the nautiloid Aturia angustata from Oligocene cold seep limestone, Washington State, U.S.A.2016Ingår i: Paleobios, Vol. 33, s. 1-6Artikel i tidskrift (Refereegranskat)
  • 17. Yamaguchi, Tatsuhiko
    et al.
    Goedert, James L.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Marine ostracodes from Paleogene hydrocarbon seep deposits in Washington State, USA and their ecological structure2016Ingår i: Geobios, ISSN 0016-6995, E-ISSN 1777-5728, Vol. 49, nr 5, s. 407-422Artikel i tidskrift (Refereegranskat)
  • 18. Nobuhara, Takami
    et al.
    Onda, Daigaku
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Mass occurrence of the enigmatic gastropod Elmira in the Late Cretaceous Sada Limestone seep deposit in southwestern Shikoku, Japan2016Ingår i: Paläontologische Zeitschrift, Vol. 90, s. 701-722Artikel i tidskrift (Refereegranskat)
  • 19.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Amano, Kazutaka
    Jenkins, Robert G.
    Predation scar frequencies in chemosymbiotic bivalves at an Oligocene seep deposit and their potential relation to inferred sulfide tolerances2016Ingår i: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 453, s. 139-145Artikel i tidskrift (Refereegranskat)
  • 20. Liebenau, Katharina
    et al.
    Kiel, Steffen
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Vardeh, David
    Treude, Tina
    Thiel, Volker
    A quantitative study on the degradation of whale bone lipids: implications for the preservation of fatty acids in marine sediments2015Ingår i: Organic Geochemistry, ISSN 0146-6380, E-ISSN 1873-5290, Vol. 89-90, s. 23-30Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The degradation and preservation affecting the biomarker record of ancient metazoa are not fully 33understood. We report on a five month experiment on the fate of fatty acids (FAs) during the degradation 34of recent whale vertebrae (Phocoena phocoena). Whale bones were analysed for extractable FAs and 35macromolecularly bound n-acyl compounds. Fresh bone showed extractable FAs dominated by 3616:1x7c, 16:0, 18:1x9c and 18:0. Calculated degradation rate constant (k) values showed a rapid 37decrease in FA concentration, with k values higher for unsaturated than for saturated compounds 38(e.g. 0.08/day for 18:1x9c, 0.05/day for 16:0). The appearance or increased abundance of distinctive 39methyl branched (e.g. i/ai-15:0 and -17:0, 10Me-16:0) and hydroxy FAs (e.g. 10OH-16:0 and 10OH- 4018:0) were observed, providing clear evidence for the microbial degradation of bone organic matter 41and an input of lipids from specialised bacteria. Catalytic hydropyrolysis (HyPy) of demineralised extrac- 42tion residues released up to 0.13% of the total n-C16 and n-C18 moieties in the degraded bones. This 43revealed that only a small, yet sizeable portion of bone-derived fatty acyl units was sequestered into 44(proto)kerogen during the earliest stages of degradation.

  • 21.
    Kiel, Steffen
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    Hansen, Bent
    Cenozoic methane-seep faunas of the Caribbean region2015Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, nr 10, artikel-id e0140788Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We report new examples of Cenozoic cold-seep communities from Colombia, Cuba, the Dominican Republic, Trinidad, and Venezuela, and attempt to improve the stratigraphic dating of Cenozoic Caribbean seep communities using strontium isotope stratigraphy. Two seep faunas are distinguished in Barbados: the late Eocene mudstone-hosted ‘Joes River fauna’ consists mainly of large lucinid bivalves and tall abyssochrysoid gastropods, and the early Miocene carbonate-hosted ‘Bath Cliffs fauna’ containing the vesicomyid Pleurophopsis, the mytilid Bathymodiolus and small gastropods. Two new Oligocene seep communities from the Sinú River basin in Colombia consist of lucinid bivalves including Elongatolucina, thyasirid and solemyid bivalves, and Pleurophopsis. A new early Miocene seep community from Cuba includes Pleurophopsis and the large lucinid Meganodontia. Strontium isotope stratigraphy suggests an Eocene age for the Cuban Elmira asphalt mine seep community, making it the oldest in the Caribbean region. A new basal Pliocene seep fauna from the Dominican Republic is characterized by the large lucinid Anodontia (Pegophysema). In Trinidad we distinguish two types of seep faunas: the mudstone-hosted Godineau River fauna consisting mainly of lucinid bivalves, and the limestone-hosted Freeman’s Bay fauna consisting chiefly of Pleurophopsis, Bathymodiolus, and small gastropods; they are all dated as late Miocene. Four new seep communities of Oligocene to Miocene age are reported from Venezuela. They consist mainly of large globular lucinid bivalves including Meganodontia, and moderately sized vesicomyid bivalves. After the late Miocene many large and typical ‘Cenozoic’ lucinid genera disappeared from the Caribbean seeps and are today known only from the central Indo-Pacific Ocean. We speculate that the increasingly oligotrophic conditions in the Caribbean Sea after the closure of the Isthmus of Panama in the Pliocene may have been unfavorable for such large lucinids because they are only facultative chemosymbiotic and need to derive a significant proportion of their nutrition from suspended organic matter.

  • 22.
    Thuy, Ben
    et al.
    Geoscience Centre, University of Göttingen.
    Kiel, Steffen
    Geoscience Center, Göttingen.
    Dulai, Alfred
    Gale, Andy S.
    University of Portsmouth, UK.
    Kroh, Andreas
    Natural History Museum, Vienna.
    Lord, Alan S.
    Numberger-Thuy, Lea
    Stöhr, Sabine
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Wisshak, Max
    First glimpse into Lower Jurassic deep-sea biodiversity: in situ diversification and resilience against extinction2014Ingår i: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 281, artikel-id 20132624Artikel i tidskrift (Refereegranskat)
1 - 22 av 22
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf