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  • 2015-2019  (180)
  • 1990-1994  (58)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Antarctic benthic diversity (1994)
    [s.l.] : Nature Publishing Group
    Nature 368 (1994), S. 297-297 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR — Poore and Wilson1, and Rex et al.2, give evidence for a distinct decline in species diversity in deep-sea communities from the tropics towards north polar re-gions; and for a less clear trend but high interregional variability in the Southern Hemisphere. Poore and Wilson1 included some ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/368297a0
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The genus Sterechinm (Echinodermata: Echinoidea) on the Weddell Sea shelf and slope (Antarctica): distribution, abundance and biomass (1991)
    Springer
    Polar biology 11 (1991), S. 227-232 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two species of the echinoid genus Sterechinus were documented from 92 trawl stations and 55 photographic stations in the eastern and southern Weddell Sea between 100 and 1200 m water depth. We found two species occuring along the whole shelf and slope, S. neumayeri being more abundant above 450 m water depth and S. antarcticus dominating the deeper regions. The size-frequency distributions of both species indicate differences in growth, mortality and longevity. First estimates of abundance and biomass of S. neumayeri and S. antarcticus are 0.085 ind/m2 & 0.005 gAFDW/m2 and 0.022 ind/m2 & 0.005 gAFDW/m2, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238455
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    On the distribution and ecology of holothurians in the Weddell Sea (Antarctica) (1991)
    Springer
    Polar biology 11 (1991), S. 145-155 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Species composition and ecology of holothurians on 52 stations in the Weddell Sea are described. A total of 26,833 specimens, belonging to 32 species, 22 genera, 7 families and 5 orders were collected during the Polarstern cruises ANT I, ANT II and ANT III. Two distinct groups showing different distributions, were identified by cluster analysis. In the first group, the majority of species belongs to the Aspidochirotacea and Elasipodida. They are adapted to soft bottoms and found at the base of the Antarctic Peninsula, in the Gould Bay area and in the Filchner Depression. The other group consists mainly of species belonging to the Dendrochirotida and individual representatives of the remaining orders. Substrates are sand, hard bottom and biogenic structures. This group maintains a higher species diversity, has a preference for shallower depths and has more species than the soft bottom group. A description of different spatial niches for several holothurians was possible using morphological features together with information obtained from underwater photographs. A comparison of the Weddell Sea species with those from East Antarctica and the area around the Antarctic Peninsula revealed close similarities for the depth range between 160 and 700m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240203
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Sponge associations in the eastern Weddell Sea (1992)
    Cambridge Univ. Press
    In:  Antarctic Science, 4 (02). pp. 137-150.
    Details
    Publication Date: 2019-09-23
    Description: About 1500 photographs from three different areas along the eastern Weddell Sea shelf and slope were analysed with respect to their sponge fauna. On the basis of material collected in concurrent bottom trawls, 34 sponge taxa were identified. Cluster and multidimensional scaling analysis showed the sponges to belong to different associations. Spatial extension of the associations is judged to be between several hundred meters and about 2 km. A deeper association (390–1125 m) on predominantly muddy substrates along a transect at Halley Bay is characterized by four opportunistic demosponge species; a second association on harder substrate in shallower depths (99–225m) off Kapp Norvegia is more diverse, with hexactinellids as one dominant component. A third cluster, comprising both Halley Bay and Kapp Norvegia stations (458–626 m), is dominated by four species which constitute a subcluster within the Kapp Norvegia sponge association. Densities vary strongly within clusters and in between geographically close stations. The species associations are related to different substrates, not to depth. Within single stations most species are patchily distributed. Both association structure and species distribution within single stations can be explained on the basis of the biology of the single sponge species.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1017/S0954102092000221
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    World ocean review: Arktis und Antarktis – extrem, klimarelevant, gefährdet (2019)
    Maribus
    Details
    Publication Date: 2024-03-14
    Description: Die sechste Ausgabe des „World Ocean Review“ (WOR) widmet sich der Arktis und Antarktis, diesen zwei extremen und ausgesprochen gegensätzlichen Regionen der Erde. Mit profunden Informationen zur Entstehungs- und Entdeckungsgeschichte bietet der WOR 6 ein tiefes Verständnis der Bedeutung der Pole für das Leben auf unserer Erde. Er zeigt zudem die zu beobachtenden Veränderungen in der Tier-und Pflanzenwelt und analysiert die zum Teil schon dramatischen Folgen, die der Klimawandel in diesen äußerst gefährdeten Regionen bewirkt.
    Type: Book , NonPeerReviewed
    Format: text
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    OceanRep: Book
  • 6
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    World Ocean Review : The Arctic and Antarctic - extreme, climatically crucial and in crisis (2019)
    Maribus
    Details
    Publication Date: 2024-03-14
    Description: This sixth World Ocean Review (WOR) focuses on the Arctic and the Antarctic – two regions which are, in a very real sense, polar opposites, with some of the world’s most extreme conditions. Besides presenting a wealth of facts and figures about the history and exploration of the polar regions, WOR 6 builds a deeper awareness of their key role for life on our planet. It highlights the changes that can be observed in their flora and fauna and analyses the already dramatic impacts of global warming on these extremely fragile regions.
    Type: Book , NonPeerReviewed
    Format: text
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    OceanRep: Book
  • 7
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    Dynamic benthic megafaunal communities: assessing temporal variations in structure, composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015 (2017)
    PANGAEA
    In:  Supplement to: Taylor, James; Krumpen, Thomas; Soltwedel, Thomas; Gutt, Julian; Bergmann, Melanie (2017): Dynamic benthic megafaunal communities: assessing temporal variations in structure, composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015. Deep Sea Research Part I: Oceanographic Research Papers, 122, 81-94, https://doi.org/10.1016/j.dsr.2017.02.008
    Details
    Publication Date: 2024-07-19
    Description: The Long-Term Ecological Research (LTER) observatory HAUSGARTEN, in the eastern Fram Strait, provides us the valuable ability to study the composition of benthic megafaunal communities through the analysis of seafloor photographs. This, in combination with extensive sampling campaigns, which have yielded a unique data set on faunal, bacterial, biogeochemical and geological properties, as well as on hydrography and sedimentation patterns, allows us to address the question of why variations in megafaunal community structure and species distribution exist within regional (60-110 km) and local (〈4 km) scales. Here, we present first results from the latitudinal HAUSGARTEN gradient, consisting of three different stations (N3, HG-IV, S3) between 78°30'N and 79°45'N (2351 - 2788 m depth), obtained via the analysis of images acquired by a towed camera (OFOS - Ocean Floor Observation System) in 2011. We assess variability in megafaunal densities, species composition and diversity as well as biotic and biogenic habitat features, which may cause the patterns observed. While there were significant regional-scale differences in megafaunal composition and densities between the stations (N3 = 26.74 ±0.63; HG-IV = 11.21 ±0.25; S3 = 18.34 ±0.39 individuals m-2), significant local differences were only found at HG-IV. Regional-scale variations may be due to the significant differences in ice coverage at each station as well as the different quantities of protein available, whereas local-scale differences at HG-IV may be a result of variation in bottom topography or factors not yet identified.
    Keywords: FRAM; FRontiers in Arctic marine Monitoring; Hausgarten; Long-term Investigation at AWI-Hausgarten off Svalbard
    Type: dataset publication series
    Format: application/zip, 6 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Sea bed videos of the Remote Operated Vehicle SPRINT from the shelf west of Spitzbergen along 25 profiles during cruise Heincke 153 (2019)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-07-19
    Description: This dataset presents sea bed videos from the shelf west of Spitzbergen along 25 profiles during cruise Heincke 153.
    Keywords: Archive of Underwater Imaging; AUI
    Type: dataset publication series
    Format: application/zip, 25 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 (2016)
    PANGAEA
    In:  Supplement to: Segelken-Voigt, Alexandra; Bracher, Astrid; Dorschel, Boris; Gutt, Julian; Huneke, Wilma; Link, Heike; Piepenburg, Dieter (2016): Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. Polar Biology, 39(5), 863-879, https://doi.org/10.1007/s00300-016-1909-y
    Details
    Publication Date: 2024-07-19
    Description: Ascidians (Ascidiacea: Tunicata) are sessile suspension feeders that represent dominant epifaunal components of the Southern Ocean shelf benthos and play a significant role in the pelagic-benthic coupling. Here, we report the results of a first study on the relationship between the distribution patterns of eight common and/or abundant (putative) ascidian species, and environmental drivers in the waters off the northern Antarctic Peninsula. During RV Polarstern cruise XXIX/3 (PS81) in January-March 2013, we used seabed imaging surveys along 28 photographic transects of 2 km length each at water depths from 70 to 770 m in three regions (northwestern Weddell Sea, southern Bransfield Strait and southern Drake Passage), differing in their general environmental setting, primarily oceanographic characteristics and sea-ice dynamics, to comparatively analyze the spatial patterns in the abundance of the selected ascidians, reliably to be identified in the photographs, at three nested spatial scales. At a regional (100-km) scale, the ascidian assemblages of the Weddell Sea differed significantly from those of the other two regions, whereas at an intermediate 10-km scale no such differences were detected among habitat types (bank, upper slope, slope, deep/canyon) on the shelf and at the shelf break within each region. These spatial patterns were superimposed by a marked small-scale (10-m) patchiness of ascidian distribution within the 2-km-long transects. Among the environmental variables considered in our study, a combination of water-mass characteristics, sea-ice dynamics (approximated by 5-year averages in sea-ice cover in the region of or surrounding the photographic stations), as well as the seabed ruggedness, was identified as explaining best the distribution patterns of the ascidians.
    Type: dataset publication series
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Benthic megafaunal composition at the Arctic deep-sea observatory HAUSGARTEN (2016)
    PANGAEA
    In:  Supplement to: Taylor, James; Krumpen, Thomas; Soltwedel, Thomas; Gutt, Julian; Bergmann, Melanie (2016): Regional- and local-scale variations in benthic megafaunal composition at the Arctic deep-sea observatory HAUSGARTEN. Deep Sea Research Part I: Oceanographic Research Papers, 108, 58-72, https://doi.org/10.1016/j.dsr.2015.12.009
    Details
    Publication Date: 2024-07-19
    Description: The Long-Term Ecological Research (LTER) observatory HAUSGARTEN, in the eastern Fram Strait, provides us the valuable ability to study the composition of benthic megafaunal communities through the analysis of seafloor photographs. This, in combination with extensive sampling campaigns, which have yielded a unique data set on faunal, bacterial, biogeochemical and geological properties, as well as on hydrography and sedimentation patterns, allows us to address the question of why variations in megafaunal community structure and species distribution exist within regional (60-110 km) and local (〈4 km) scales. Here, we present first results from the latitudinal HAUSGARTEN gradient, consisting of three different stations (N3, HG-IV, S3) between 78°30'N and 79°45'N (2351 - 2788 m depth), obtained via the analysis of images acquired by a towed camera (OFOS - Ocean Floor Observation System) in 2011. We assess variability in megafaunal densities, species composition and diversity as well as biotic and biogenic habitat features, which may cause the patterns observed. While there were significant regional-scale differences in megafaunal composition and densities between the stations (N3 = 26.74 ± 0.63; HG-IV = 11.21 ± 0.25; S3 = 18.34 ± 0.39 individuals/m**2), significant local differences were only found at HG-IV. Regional-scale variations may be due to the significant differences in ice coverage at each station as well as the different quantities of protein available, whereas local-scale differences at HG-IV may be a result of variation in bottom topography or factors not yet identified.
    Keywords: Hausgarten; Long-term Investigation at AWI-Hausgarten off Svalbard; LTER_Benthos; Macrobenthic long-term series in the German Bight
    Type: dataset publication series
    Format: application/zip, 13 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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