GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2010-2014  (66)
Document type
Keywords
Publisher
Language
Years
Year
  • 1
    Article
    Article
    Frühwarnsysteme für globale Umweltveränderungen und ihre historische Dokumentation in natürlichen Klimaarchiven (2011)
    Associated volumes
    Details Availability
    Keywords: Klimatologie ; Arktisforschung ; Palökologie ; Paläoozeanographie
    In: Akademie der Wissenschaften und der Literatur Mainz, Forschungsvorhaben im Akademienprogramm, Mainz : AdW, 2011, (2011), Seite 58-59
    In: year:2011
    In: pages:58-59
    Type of Medium: Article
    Pages: Ill.
    Language: German
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GEOMAR CATALOGUE
    Link to Library Catalog
    get availability status
  • 2
    Image
    Image
    Warnsignal Klima - die Polarregionen : wissenschaftliche Fakten (2014)
    Hamburg : Verl. Wissenschaftliche Auswertungen
    Details Availability
    Keywords: Klimaschutz ; Meereskunde ; Polargebiete ; Aufsatzsammlung ; Polargebiete ; Klimaschutz ; Meereskunde
    Description / Table of Contents: Die Polarregionen üben trotz ihrer abgelegenen Lage einen erheblichen Einfluss auf das Weltklima aus. Dies hängt besonders mit den bedeutenden Kopplungsprozessen zwischen dem Eis (Eisschilde, Meereis, Schnee und Permafrost) und der atmosphärischen sowie ozeanischen Zirkulation zusammen. Das Abschmelzen aller polaren Eisschilde würde beispielsweise einen globalen Anstieg des Meeresspiegels um etwa 70 m bewirken. Aber auch schon geringe Schwankungen im polaren Eisvolumen führen zu merklichen Veränderungen des Meeresspiegels. Die Klima-Prognosen der letzten Jahre haben sich weitgehend bestätigt. Die heutigen Messungen zeigen sogar, dass sich das Klima eher schneller ändert als erwartet. Die beobachtete Erderwärmung während des 20. Jahrhunderts hat sich in diesem Jahrhundert fortgesetzt; zurzeit beträgt die mittlere globale Erwärmung über den Kontinenten bereits 0,9 °C. Diese Entwicklung wird sich fortsetzen, wenn die Anreicherung der Atmosphäre mit Treibhausgasen (vor allem CO2) anhält. Besorgniserregend ist die Tatsache, dass die heute emittierten CO2-Mengen Jahrhunderte in der Atmosphäre verbleiben. Eine aktuelle Bestandsaufnahme der Situation in den Polarregionen wird wiedergegeben. Insbesondere werden die heutigen und zukünftigen Folgen des Klimawandels aus unterschiedlicher Sicht beleuchtet. Daran haben sich 100 Autoren aus 42 Institutionen beteiligt.
    Type of Medium: Image
    Pages: 375 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 3980966860 , 9783980966863
    Series Statement: Warnsignale
    URL: http://www.gbv.de/dms/tib-ub-hannover/777032325.pdf
    URL: http://deposit.d-nb.de/cgi-bin/dokserv?id=4626641&prov=M&dok_var=1&dok_ext=htm
    DDC: 551.6998
    RVK:
    RZ 10438
    RVK:
    RY 20053
    RVK:
    RY 20438
    Language: German
    Note: In Kooperation mit GEO. - Die vorliegende Veröffentlichung ist zum Teil auf der Grundlage des im Jahr 2006 erschienenen Buches "Warnsignale aus den Polarregionen" konzipiert. Etwa die Hälfte der 52 Kapitel ist völlig neu und von anderen Autoren verfasst worden. Bei den restlichen Kapiteln handelt es sich um aktualisierte Texte , Laut Widmung 14. Band der "Warnsignale" [ungezählte Buchreihe] , Enthält: 255 Abbildungen, 20 Tabellen und 10 Tafeln , Literaturangaben , Literaturangaben. - Sachregister S. 370 - 375
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GEOMAR CATALOGUE
    Link to Library Catalog
    get availability status
  • 3
    Online Resource
    Online Resource
    Ecophysiological responses of the cold-water coral Lophelia pertusa from the North Atlantic under projected future climate change conditions (2012)
    Kiel
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (87 Seiten = 7 MB) , Illustrationen, Graphen, Karten
    Edition: 2022
    URL: https://oceanrep.geomar.de/20122/
    Language: English
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GEOMAR CATALOGUE
    Link to Library Catalog
    get availability status
  • 4
    facet.materialart.
    Unknown
    Evidence for a pan-Arctic sea-ice diatom diet in Strongylocentrotus spp (2012)
    Springer
    In:  Polar Biology, 35 (8). pp. 1281-1287.
    Details
    Publication Date: 2014-02-18
    Description: The Arctic marine food web is based on organic matter produced by both phytoplankton and sea-ice algae. With the decline of Arctic sea ice, the sustained availability of organic carbon of sea-ice origin is unclear. Recently, the detection of the sea-ice diatom biomarker IP25 in a range of Arctic benthic macrofauna indicated that this is a highly suitable biomarker for the identification of organic carbon derived from sea-ice primary production in Arctic food webs. However, the data presented previously were restricted to a single geographical region in the Canadian Arctic. Here, we show that IP25 is present in sea urchins of the genus Strongylocentrotus collected from ten locations with seasonal sea-ice cover from the Canadian Archipelago, Greenland and Spitsbergen. In contrast, IP25 was not found in specimens of Echinus esculentus collected from the southwest UK, where sea ice is absent. Our findings provide evidence that the presence of IP25 in macrobenthic organisms can be used across different Arctic regions as a versatile indicator of a diet containing carbon of sea-ice origin.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00300-012-1164-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
    facet.materialart.
    Unknown
    Multivariate benthic ecosystem functioning in the Arctic - benthic fluxes explained by environmental parameters in the southeastern Beaufort Sea (2013)
    Copernicus Publications (EGU)
    In:  Biogeosciences (BG), 10 (9). pp. 5911-5929.
    Details
    Publication Date: 2015-08-03
    Description: The effects of climate change on Arctic marine ecosystems and their biogeochemical cycles are difficult to predict given the complex physical, biological and chemical interactions among the ecosystem components. We studied benthic biogeochemical fluxes in the Arctic and the influence of short-term (seasonal to annual), long-term (annual to decadal) and other environmental variability on their spatial distribution to provide a baseline for estimates of the impact of future changes. In summer 2009, we measured fluxes of dissolved oxygen, nitrate, nitrite, ammonia, soluble reactive phosphate and silicic acid at the sediment–water interface at eight sites in the southeastern Beaufort Sea at water depths from 45 to 580 m. The spatial pattern of the measured benthic boundary fluxes was heterogeneous. Multivariate analysis of flux data showed that no single or reduced combination of fluxes could explain the majority of spatial variation, indicating that oxygen flux is not representative of other nutrient sink–source dynamics. We tested the influence of eight environmental parameters on single benthic fluxes. Short-term environmental parameters (sinking flux of particulate organic carbon above the bottom, sediment surface Chl a) were most important for explaining oxygen, ammonium and nitrate fluxes. Long-term parameters (porosity, surface manganese and iron concentration, bottom water oxygen concentrations) together with δ13Corg signature explained most of the spatial variation in phosphate, nitrate and nitrite fluxes. Variation in pigments at the sediment surface was most important to explain variation in fluxes of silicic acid. In a model including all fluxes synchronously, the overall spatial distribution could be best explained (57%) by the combination of sediment Chl a, phaeopigments, δ13Corg, surficial manganese and bottom water oxygen concentration. We conclude that it is necessary to consider long-term environmental variability along with rapidly ongoing environmental changes to predict the flux of oxygen and nutrients across Arctic sediments even at short timescales. Our results contribute to improve ecological models predicting the impact of climate change on the functioning of marine ecosystems.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.5194/bg-10-5911-2013
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
    facet.materialart.
    Unknown
    Are Hotspots Always Hotspots? The Relationship between Diversity, Resource and Ecosystem Functions in the Arctic (2013)
    Public Library of Science
    In:  PLoS ONE, 8 (9). e74077.
    Details
    Publication Date: 2015-07-24
    Description: The diversity-ecosystem function relationship is an important topic in ecology but has not received much attention in Arctic environments, and has rarely been tested for its stability in time. We studied the temporal variability of benthic ecosystem functioning at hotspots (sites with high benthic boundary fluxes) and coldspots (sites with lower fluxes) across two years in the Canadian Arctic. Benthic remineralisation function was measured as fluxes of oxygen, silicic acid, phosphate, nitrate and nitrite at the sediment-water interface. In addition we determined sediment pigment concentration and taxonomic and functional macrobenthic diversity. To separate temporal from spatial variability, we sampled the same nine sites from the Mackenzie Shelf to Baffin Bay during the same season (summer or fall) in 2008 and 2009. We observed that temporal variability of benthic remineralisation function at hotspots is higher than at coldspots and that taxonomic and functional macrobenthic diversity did not change significantly between years. Temporal variability of food availability (i.e., sediment surface pigment concentration) seemed higher at coldspot than at hotspot areas. Sediment chlorophyll a (Chl a) concentration, taxonomic richness, total abundance, water depth and abundance of the largest gallery-burrowing polychaete Lumbrineris tetraura together explained 42% of the total variation in fluxes. Food supply proxies (i.e., sediment Chl a and depth) split hot- from coldspot stations and explained variation on the axis of temporal variability, and macrofaunal community parameters explained variation mostly along the axis separating eastern from western sites with hot- or coldspot regimes. We conclude that variability in benthic remineralisation function, food supply and diversity will react to climate change on different time scales, and that their interactive effects may hide the detection of progressive change, particularly at hotspots. Time-series of benthic functions and its related parameters should be conducted at both hot- and coldspots to produce reliable predictive models.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1371/journal.pone.0074077
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
    facet.materialart.
    Unknown
    Das Institut für Polarökologie der Christian-Albrechts-Universität und die Polarforschung in Kiel (2013)
    Deutsche Gesellschaft für Polarforschung; Alfred-Wegener-Institu für Polar- und Meeresforschung
    In:  Polarforschung, 83 (1). pp. 1-15.
    Details
    Publication Date: 2014-09-04
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
    facet.materialart.
    Unknown
    The influence of the geomorphological and sedimentological settings on the distribution of epibenthic assemblages on a flat topped hill on the over-deepened shelf of the western Weddell Sea (Southern Ocean) (2014)
    Copernicus Publications (EGU)
    In:  Biogeosciences (BG), 11 (14). pp. 3797-3817.
    Details
    Publication Date: 2017-10-24
    Description: Epibenthos communities play an important role in the marine ecosystems of the Weddell Sea. Information on the factors controlling their structure and distribution are, however, still rare. In particular, the interactions between environmental factors and biotic assemblages are not fully understood. Nachtigaller Hill, a newly discovered seabed structure on the over-deepened shelf of the northwest Weddell Sea (Southern Ocean), offers a unique site to study these interactions in a high-latitude Antarctic setting. Based on high-resolution bathymetry and georeferenced biological data, the effect of the terrain and related environmental parameters on the epibenthos was assessed. At Nachtigaller Hill, both geomorphological and biological data showed complex distribution patterns, reflecting local processes such as iceberg scouring and locally amplified bottom currents. This variability was also generally reflected in the variable epibenthos distribution patterns although statistical analyses did not show strong correlations between the selected environmental parameters and species abundances. By analysing the interactions between environmental and biological patterns, this study provides crucial information towards a better understanding of the factors and processes that drive epibenthos communities on the shelves of the Weddell Sea and probably also on other Antarctic shelves.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.5194/bg-11-3797-2014
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
    facet.materialart.
    Unknown
    Rhodolith beds (Corallinales, Rhodophyta) and their physical and biological environment at 80°31′N in Nordkappbukta (Nordaustlandet, Svalbard Archipelago, Norway) (2012)
    International Phycological Society
    In:  Phycologia, 51 (4). pp. 371-390.
    Details
    Publication Date: 2019-12-03
    Description: Polar coralline red algae (Corallinales, Rhodophyta) that form rhodoliths have received little attention concerning their potential as ecosystem engineers and carbonate factories; although, recent findings revealed that they are much more widespread in polar waters than previously thought. The present study deals with the northernmost rhodolith communities currently known, discovered in 2006 at 80 degrees 31'N in Nordkappbukta (North Cape Bay) at Nordaustlandet, Svalbard. These perennial coralline algae must be adapted to extreme seasonality in terms of light regime (c. 4 months winter darkness), sea ice coverage, nutrient supply, turbidity of the water column, temperature and salinity. The rhodolith communities and their environment were investigated using multibeam swath bathymetry, CTD measurements, recordings of the photosynthetic active radiation (PAR) and determination of the water chemistry, seabed imaging and targeted sampling by means of the manned submersible JAGO as well as benthic collections with a dredge. The coralline flora was composed mainly of Lithothamnion glaciale, with a lesser amount of Phymatolithon tenue. Based on their distribution and development at different depth levels, a facies model was developed. Rhodoliths occurred between 30 and 51 m, while coralline algae attached to cobbles were present as deep as 78 m. Measurements of the PAR indicated their adaptation to extreme low light levels. Ambient waters were always saturated with reference to calcite and aragonite for the whole area. The rhodolith-associated macrobenthic fauna samples yielded 59 species, only one of which was typically Arctic, and the concomitant appearance of corallines and grazers kept the corallines free from epiphytes and coequally provided feeding grounds for the grazers. Overall, L. glaciate and P. tenue appeared to be well adapted to the extreme environment of the Arctic.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.2216/11-76.1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 10
    facet.materialart.
    Unknown
    Arctic rhodolith beds and their environmental controls (Spitsbergen, Norway) (2014)
    Springer
    In:  Facies, 60 (1). pp. 15-37.
    Details
    Publication Date: 2020-10-16
    Description: Coralline algae (Corallinales, Rhodophyta) that form rhodoliths are important ecosystem engineers and carbonate producers in many polar coastal habitats. This study deals with rhodolith communities from Floskjeret (78°18′N), Krossfjorden (79°08′N), and Mosselbukta (79°53′N), off Spitsbergen Island, Svalbard Archipelago, Norway. Strong seasonal variations in temperature, salinity, light regime, sea-ice coverage, and turbidity characterize these localities. The coralline algal flora consists of Lithothamnion glaciale and Phymatolithon tenue. Well-developed rhodoliths were recorded between 27 and 47 m water depth, while coralline algal encrustations on lithoclastic cobbles were detected down to 77 m water depth. At all sites, ambient waters were saturated with respect to both aragonite and calcite, and the rhodolith beds were located predominately at dysphotic water depths. The rhodolith-associated macrobenthic fauna included grazing organisms such as chitons and echinoids. With decreasing water depth, the rhodolith pavements were regularly overgrown by non-calcareous Polysiphonia-like red algae. The corallines are thriving and are highly specialized in their adaptations to the physical environment as well as in their interaction with the associated benthic fauna, which is similar to other polar rhodolith communities. The marine environment of Spitsbergen is already affected by a climate-driven ecological regime shift and will lead to an increased borealization in the near future, with presently unpredictable consequences for coralline red algal communities.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10347-013-0372-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...