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  • 2020-2024  (33)
  • 2010-2014  (94)
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Year
  • 1
    Online Resource
    Online Resource
    Impacts of plastic pollution in the ocean on marine species, biodiversity an ecosystems : study (2022)
    Berlin : WWF Germany
    Details Availability
    Keywords: Kunststoffabfall ; Meeresverschmutzung ; Artensterben
    Description / Table of Contents: Herausgeberinfo: A new report commissioned by WWF provides the most comprehensive account to date of the extent of plastic pollution in the world's oceans. comprehensive account of the extent of plastic pollution in the oceans. oceans, its impact on marine species and ecosystems, and how these trends are and the likely development of these trends in the future.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (221 Seiten) , Illustrationen
    ISBN: 9783946211464
    URL: http://dx.doi.org/10.5281/zenodo.5898684
    DOI: 10.5281/zenodo.5898684
    Language: English
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    GEOMAR CATALOGUE
    Link to Library Catalog
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  • 2
    Online Resource
    Online Resource
    Vervollständigung der Zeitreihen des StUK während der Betriebsphase und Ermittlung von Veränderungen des Benthos durch Ausweitung des anlagenbezogenen Effektmonitorings : Schlussbericht zum Projekt: Ökologische Begleitforschung am Offshore-Testfeldvorhaben alpha ventus zur Evaluierung des Standarduntersuchungskonzeptes des BSH (StUKplus) : Laufzeit des Projektes: 01.10.2008 - 31.03.2012 (2014)
    Bremerhaven
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (86 S., 2,54 MB) , Illustrationen, graphische Darstellungen
    URL: https://edocs.tib.eu/files/e01fb16/845589989.pdf
    URL: https://doi.org/10.2314/GBV:845589989
    DOI: 10.2314/GBV:845589989
    Language: German
    Note: Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Förderkennzeichen BMU 0327689A , Systemvoraussetzungen: Acrobat reader. , Mit deutscher Zusammenfassung
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  • 3
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    Effects of ocean acidification on different life-cycle stages of the kelp Laminaria hyperborea (Phaeophyceae) (2012)
    de Gruyter
    In:  Botanica Marina, 55 (5).
    Details
    Publication Date: 2020-06-23
    Description: Our objective for this study was to evaluate the influence of preindustrial and expected future atmospheric CO2 concentrations (280 μatm and 700 μatm pCO2, respectively) on different life-cycle stages of the kelp Laminaria hyperborea from Helgoland (Germany, North Sea). Zoospore germination, gametogenesis, vegetative growth, sorus formation and photosynthetic performance of vegetative and fertile tissue were examined. The contribution of external carbonic anhydrase (exCA) to C-supply for net-photosynthesis (net-PS) and the Chla- and phlorotannin content were investigated. Female gametogenesis and vegetative growth of sporophytes were significantly enhanced under the expected future pCO2. rETR(max) and net-PS of young vegetative sporophytes tended to increase performance at higher pCO2. The trend towards elevated net-PS vanished after inhibition of exCA. In vegetative sporophytes, phlorotannin content and Chla content were not significantly affected by pCO2.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1515/bot-2012-0163
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Structure and distribution of a threatened muddy biotope in the south-eastern North Sea (2020)
    Elsevier
    Details
    Publication Date: 2023-02-08
    Description: Understanding the distribution and structure of biotopes is essential for marine conservation according to international legislation, such as the European Marine Strategy Framework Directive (MSFD). The biotope 'Sea Pen and Burrowing Megafuna Communities' is included in the OSPAR list of threatened and/or declining habitats. Accordingly, the MSFD prescribes a monitoring of this biotope by the member states of the EU. In the German North Sea, however, the distribution and spatial extent of this biotope as well as the structuring of its benthic species inventory is unknown. We used an extensive geo-referenced dataset on occurrence, abundance and biomass of the benthic infauna of the south-eastern North Sea to estimate the distribution of the biotope and to characterize the associated infauna assemblages. Sediment preferences of the burrowing megafauna, comprising decapod crustaceans and echiurids, were identified and the core distribution areas of the burrowing megafauna were modelled using Random Forests. Clusters of benthic infauna inside the core distribution areas were identified by fuzzy clustering. The burrowing megafauna occurred on a wide range of sediments with varying mud contents. The core distribution area of the burrowing megafauna was characterized by elevated mud content and a water depth of 25-55 m. The analysis of the benthic communities and their relation to sedimentological conditions identified four infauna clusters of slightly varying species composition. The biotope type 'Sea Pen and Burrowing Megafuna Communities' is primarily located inside the paleo valley of the river Elbe and covers an area of 4980 km2. Dedicated monitoring will have to take into account the spatial extent and the structural variability of the biotope. Our results can provide a baseline for the evaluation of the future development of the environmental status of the biotope. The maps generated herein will facilitate the communication of information relevant for environmental management to authorities and policy makers.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Impacts of plastic pollution in the oceans on marine species, biodiversity and ecosystems (2022)
    WWW Germany
    Details
    Publication Date: 2024-02-07
    Description: A new report commissioned by WWF provides the most comprehensive account to date of the extent to which plastic pollution is affecting the global ocean, the impacts it’s having on marine species and ecosystems, and how these trends are likely to develop in future. The report by researchers from the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI) reveals a serious and rapidly worsening situation that demands immediate and concerted international action: ● Today almost every species group in the ocean has encountered plastic pollution, with scientists observing negative effects in almost 90% of assessed species. ● Not only has plastic pollution entered the marine food web, it is significantly affecting the productivity of some of the world’s most important marine ecosystems like coral reefs and mangroves. ● Several key global regions – including areas in the Mediterranean, the East China and Yellow Seas and Arctic sea ice – have already exceeded plastic pollution thresholds beyond which significant ecological risks can occur, and several more regions are expected to follow suit in the coming years. ● If all plastic pollution inputs stopped today, marine microplastic levels would still more than double by 2050 – and some scenarios project a 50-fold increase by 2100.
    Type: Book , NonPeerReviewed
    Format: text
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    OceanRep: Book
  • 6
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    World Ocean Review : The Ocean, Guarantor of Life – Sustainable Use, Effective Protection (2021)
    Maribus
    Details
    Publication Date: 2024-03-14
    Description: The seventh edition of the »World Ocean Review« focuses on the effects of climate change on the physics of the ocean and on its biotic communities; the consequences of fishing, shipping, resource extraction, energy production, and marine pollution; and the questions of how active substances from the ocean can be used and how the ocean can be managed in the future in such a way that both its protection and the participation of as many people as possible in its services and goods are ensured.
    Type: Book , NonPeerReviewed
    Format: text
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    OceanRep: Book
  • 7
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    World ocean review: Lebensgarant Ozean – nachhaltig nutzen, wirksam schützen (2021)
    Maribus
    Details
    Publication Date: 2024-03-14
    Description: Im Fokus der siebten Ausgabe des »World Ocean Review« stehen die Auswirkungen des Klimawandels auf die Physik des Meeres und auf seine Lebensgemeinschaften; die Folgen von Fischerei, Schifffahrt, Ressourcenabbau, Energiegewinnung und Meeresverschmutzung sowie die Fragen, wie sich Wirkstoffe aus dem Meer nutzen lassen und wie der Ozean künftig so verwaltet werden kann, dass sowohl sein Schutz als auch die Teilhabe möglichst aller Menschen an seinen Leistungen und Gütern gewährleistet sind.
    Type: Book , NonPeerReviewed
    Format: text
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    OceanRep: Book
  • 8
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    Effects of ocean acidification on growth and physiology of Ulva lactuca (Chlorophyta) in a rockpool-scenario, link to supplementary data (2013)
    PANGAEA
    In:  Supplement to: Olischläger, Mark; Bartsch, Inka; Gutow, Lars; Wiencke, Christian (2013): Effects of ocean acidification on growth and physiology of Ulva lactuca (Chlorophyta) in a rockpool-scenario. Phycological Research, 61(3), 180-190, https://doi.org/10.1111/pre.12006
    Details
    Publication Date: 2023-06-13
    Description: Rising atmospheric CO2-concentrations will have severe consequences for a variety of biological processes. We investigated the responses of the green alga Ulva lactuca (Linnaeus) to rising CO2-concentrations in a rockpool scenario. U. lactuca was cultured under aeraton with air containing either preindustrial pCO2 (280µatm) or for the end of the 21st century predicted (700µatm) pCO2 for 31 days. We addressed the following question: Will elevated CO2-concentrations affect photosynthesis (net photosynthesis, rETR(max), Fv/Fm, pigment composition) and growth of U. lactuca in rockpools with limited water exchange? Two phases of the experiment were distinguished: In the initial phase (day 1-4) the Seawater Carbonate System (SWCS) of the culture medium could be adjusted to the selected atmospheric pCO2 condition by continuous aeration with target pCO2 values. In the second phase (day 4-31) the SWCS was largely determined by the metabolism of the growing U. lactuca biomass. In the initial phase, Fv/Fm and rETR(max) were only slightly elevated at high CO2-concentrations whereas growth was significantly enhanced. After 31 days the Chl a content of the thalli was significantly lower under future conditions and the photosynthesis of thalli grown under preindustrial conditions was not dependent on external carbonic anhydrase. Biomass increased significantly at high CO2-concentrations. At low CO2-concentrations most adult thalli disintegrated between day 14 and 21, whereas at high CO2-concentrations most thalli remained integer until day 31. Thallus disintegration at low CO2-concentrations was mirrored in a drastic decline in seawater DIC and HCO3-. Accordingly, the SWCS differed significantly between the treatments. Our results indicated a slight enhancement of photosynthetic performance and significantly elevated growth of U. lactuca at future CO2-concentrations. The accelerated thallus disintegration at high CO2-concentrations under conditions of limited water exchange indicates additional CO2 effects on the life cycle of U. lactuca when living in rockpools.
    Keywords: AWI_Coast; BIOACID; Biological Impacts of Ocean Acidification; Coastal Ecology @ AWI
    Type: Dataset
    Format: application/zip, 2.5 MBytes
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    DATA PANGAEA
  • 9
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    Rafting assemblages on pelagic Sargassum and floating marine debris from the Sargasso Sea (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-01
    Description: Pelagic Sargassum and floating marine debris were collected in the Sargasso Sea (subtropical NW Atlantic) during the cruise MSM41 of the German research vessel Maria S. Merian in April 2015. Flotsam items were collected with a dip net (mesh size: 1 mm) from the rescue boat of the research vessel at 19 stations distributed in coordination with the other sampling activities of the cruise. Few, mostly larger, debris samples were taken from aboard the research vessel using a dip net with a mesh size of 9 cm. The exact sampling position of each floating item was recorded by a handheld GPS. All mobile epifaunal organisms were carefully washed down from the flotsam items with freshwater and retrieved in a sieve with a mesh size of 250 µm. The species were identified and the individuals counted. Each Sargassum thallus was inspected under a stereo microscope to identify the attached sessile epifaunal species. Sessile species were not quantified. The marine debris items or sub-samples thereof (in case of large bulky items) were preserved in buffered formalin-seawater solution. The sessile epifauna on the debris items was analyzed after the cruise in the laboratories of the Alfred Wegener Institute in Bremerhaven, Germany. Each Sargassum clump was blotted on tissue paper to remove adherent seawater and weighed. The sizes of the debris items were measured to calculate the surface area.
    Keywords: Comment; DATE/TIME; epibiota; Event label; floating marine debris; LATITUDE; LITTER; Litter Survey; LONGITUDE; Maria S. Merian; Mobility; MSM41; MSM41_litter-A; MSM41_litter-B; MSM41_litter-C; MSM41_litter-D; MSM41_litter-E; MSM41_litter-F; MSM41_litter-G; MSM41_litter-G1; MSM41_litter-H; MSM41_litter-I; MSM41_litter-J; MSM41_litter-K; MSM41_litter-M; MSM41_litter-N; MSM41_litter-O; MSM41_litter-P; MSM41_litter-Q; MSM41_litter-S; MSM41_litter-U; MSM41_litter-V; pollution; rafting; Rafting species; Sample ID; Sargasso Sea; Sargassum community; South Atlantic Ocean; Station label; Substratum; Substratum category; Taxon/taxa
    Type: Dataset
    Format: text/tab-separated-values, 8362 data points
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    DATA PANGAEA
  • 10
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    Effects of ocean acidification on different life-cycle stages of the kelp Laminaria hyperborea (Phaeophyceae), link to supplementary data (2012)
    PANGAEA
    Details
    Publication Date: 2023-11-23
    Description: Our objective for this study was to evaluate the influence of preindustrial and expected future atmospheric CO2 concentrations (280 µatm and 700 µatm pCO2, respectively) on different life-cycle stages of the kelp Laminaria hyperborea from Helgoland (Germany, North Sea). Zoospore germination, gametogenesis, vegetative growth, sorus formation and photosynthetic performance of vegetative and fertile tissue were examined. The contribution of external carbonic anhydrase (exCA) to C-supply for net-photosynthesis (net-PS) and the Chla- and phlorotannin content were investigated. Female gametogenesis and vegetative growth of sporophytes were significantly enhanced under the expected future pCO2. rETR(max) and net-PS of young vegetative sporophytes tended to increase performance at higher pCO2. The trend towards elevated net-PS vanished after inhibition of exCA. In vegetative sporophytes, phlorotannin content and Chla content were not significantly affected by pCO2.
    Keywords: AWI_Coast; BIOACID; Biological Impacts of Ocean Acidification; Coastal Ecology @ AWI; German Bight, North Sea; Helgoland; Meeresstation Helgoland; MULT; Multiple investigations; off_Helgoland
    Type: Dataset
    Format: application/zip, 1.7 MBytes
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    DATA PANGAEA
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