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  • Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung  (27)
  • Nature Research  (23)
  • 11
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    Manganese co-limitation of phytoplankton growth and major nutrient drawdown in the Southern Ocean (2021)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: Residual macronutrients in the surface Southern Ocean result from restricted biological utilization, caused by low wintertime irradiance, cold temperatures, and insufficient micronutrients. Variability in utilization alters oceanic CO2 sequestration at glacial-interglacial timescales. The role for insufficient iron has been examined in detail, but manganese also has an essential function in photosynthesis and dissolved concentrations in the Southern Ocean can be strongly depleted. However, clear evidence for or against manganese limitation in this system is lacking. Here we present results from ten experiments distributed across Drake Passage. We found manganese (co-)limited phytoplankton growth and macronutrient consumption in central Drake Passage, whilst iron limitation was widespread nearer the South American and Antarctic continental shelves. Spatial patterns were reconciled with the different rates and timescales for removal of each element from seawater. Our results suggest an important role for manganese in modelling Southern Ocean productivity and understanding major nutrient drawdown in glacial periods.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 12
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    Warming and acidification threaten glass sponge Aphrocallistes vastus pumping and reef formation (2020)
    Nature Research
    Details
    Publication Date: 2023-02-08
    Description: The glass sponge Aphrocallistes vastus contributes to the formation of large reefs unique to the Northeast Pacific Ocean. These habitats have tremendous filtration capacity that facilitates flow of carbon between trophic levels. Their sensitivity and resilience to climate change, and thus persistence in the Anthropocene, is unknown. Here we show that ocean acidification and warming, alone and in combination have significant adverse effects on pumping capacity, contribute to irreversible tissue withdrawal, and weaken skeletal strength and stiffness of A. vastus. Within one month sponges exposed to warming (including combined treatment) ceased pumping (50–60%) and exhibited tissue withdrawal (10–25%). Thermal and acidification stress significantly reduced skeletal stiffness, and warming weakened it, potentially curtailing reef formation. Environmental data suggests conditions causing irreversible damage are possible in the field at +0.5 °C above current conditions, indicating that ongoing climate change is a serious and immediate threat to A. vastus, reef dependent communities, and potentially other glass sponges.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 13
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    Expedition Programmes PS135/1 and PS135/2 (2023)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Expeditionsprogramm Polarstern, Bremerhaven, Germany, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 21 p.
    Details
    Publication Date: 2023-06-13
    Repository Name: EPIC Alfred Wegener Institut
    Type: Expedition program , notRev
    Format: application/pdf
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    PAPER (OA)
  • 14
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    Expeditions to Antarctica: ANT-Land 2021/22 Neumayer Station III, Kohnen Station, Flight Operations and Field Campaigns (2022)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 127 p., ISSN: 1866-3192
    Details
    Publication Date: 2023-10-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Berichte zur Polar- und Meeresforschung" , notRev
    Format: application/pdf
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    PAPER (OA)
  • 15
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    Annual Report 2017 - Facts and Figures (2018)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Communications and Media Relations, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 17 p.
    Details
    Publication Date: 2019-02-13
    Repository Name: EPIC Alfred Wegener Institut
    Type: Outreach , notRev
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  • 16
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    Expeditions to Antarctica: ANT-Land 2022/23 NEUMAYER STATION III, Kohnen Station and Field Campaigns (2024)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 784, 217 p., pp. 1-217, ISSN: 1866-3192
    Details
    Publication Date: 2024-05-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Berichte zur Polar- und Meeresforschung" , notRev
    Format: application/pdf
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    PAPER (OA)
  • 17
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    Expedition Programme PS139/1 and PS139/2 (2023)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Expeditionsprogramm Polarstern, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 20 p., pp. 1-20
    Details
    Publication Date: 2024-04-24
    Repository Name: EPIC Alfred Wegener Institut
    Type: Expedition program , notRev
    Format: application/pdf
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  • 18
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    Annual Report 2014 - Facts and Figures (2015)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Communications and Media Relations, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 17 p.
    Details
    Publication Date: 2016-06-14
    Repository Name: EPIC Alfred Wegener Institut
    Type: Outreach , notRev
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  • 19
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    Annual Report 2016 - Facts and Figures (2017)
    Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
    In:  EPIC3Communications and Media Relations, Bremerhaven, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, 17 p.
    Details
    Publication Date: 2017-07-25
    Repository Name: EPIC Alfred Wegener Institut
    Type: Outreach , notRev
    Format: application/pdf
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    PAPER (OA)
  • 20
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    Integrating experimental and distribution data to predict future species patterns (2019)
    Nature Research
    In:  Scientific Reports, 9 (1). Art.Nr. 1821.
    Details
    Publication Date: 2022-01-31
    Description: Predictive species distribution models are mostly based on statistical dependence between environmental and distributional data and therefore may fail to account for physiological limits and biological interactions that are fundamental when modelling species distributions under future climate conditions. Here, we developed a state-of-the-art method integrating biological theory with survey and experimental data in a way that allows us to explicitly model both physical tolerance limits of species and inherent natural variability in regional conditions and thereby improve the reliability of species distribution predictions under future climate conditions. By using a macroalga-herbivore association (Fucus vesiculosus - Idotea balthica) as a case study, we illustrated how salinity reduction and temperature increase under future climate conditions may significantly reduce the occurrence and biomass of these important coastal species. Moreover, we showed that the reduction of herbivore occurrence is linked to reduction of their host macroalgae. Spatial predictive modelling and experimental biology have been traditionally seen as separate fields but stronger interlinkages between these disciplines can improve species distribution projections under climate change. Experiments enable qualitative prior knowledge to be defined and identify cause-effect relationships, and thereby better foresee alterations in ecosystem structure and functioning under future climate conditions that are not necessarily seen in projections based on non-causal statistical relationships alone.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/s41598-018-38416-3
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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