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  • 2020-2022  (7)
  • 1
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    IOC-IODE and GOOS and IEEE Oceanic Engineering Society | Oostende, Belgium
    Publication Date: 2021-05-19
    Description: Presentation at 'Evolving and Sustaining Ocean Best Practices Workshop III, International Oceanographic Data and Information Exchange (IODE) of the Intergovernmental Oceanographic Commission of UNESCO, Project Office for IODE, Oostende, Belgium, 02-03 Dec 2019
    Description: Published
    Repository Name: AquaDocs
    Type: Conference Material , Not Known
    Format: 6 slides
    Location Call Number Limitation Availability
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  • 2
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    IOC-IODE and GOOS and IEEE Oceanic Engineering Society | Oostende, Belgium
    Publication Date: 2021-05-19
    Description: Presentation at 'Evolving and Sustaining Ocean Best Practices Workshop III, International Oceanographic Data and Information Exchange (IODE) of the Intergovernmental Oceanographic Commission of UNESCO, Project Office for IODE, Oostende, Belgium, 02-03 Dec 2019
    Description: Published
    Repository Name: AquaDocs
    Type: Conference Material , Not Known
    Format: 6 slides
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2021-11-10
    Description: Arctic Ocean sea ice cover is shrinking due to warming. Long-term sediment trap data shows higher export efficiency of particulate organic carbon in regions with seasonal sea ice compared to regions without sea ice. To investigate this sea-ice enhanced export, we compared how different early summer phytoplankton communities in seasonally ice-free and ice-covered regions of the Fram Strait affect carbon export and vertical dispersal of microbes. In situ collected aggregates revealed two-fold higher carbon export of diatom-rich aggregates in ice-covered regions, compared to Phaeocystis aggregates in the ice-free region. Using microbial source tracking, we found that ice-covered regions were also associated with more surface-born microbial clades exported to the deep sea. Taken together, our results showed that ice-covered regions are responsible for high export efficiency and provide strong vertical microbial connectivity. Therefore, continuous sea-ice loss may decrease the vertical export efficiency, and thus the pelagic-benthic coupling, with potential repercussions for Arctic deep-sea ecosystems.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
    Publication Date: 2021-11-16
    Description: Biogeochemical cycling of carbon (C) and nitrogen (N) in the ocean depends on both the composition and activity of underlying biological communities and on abiotic factors. The Southern Ocean is encircled by a series of strong currents and fronts, providing a barrier to microbial dispersion into adjacent oligotrophic gyres. Our study region straddles the boundary between the nutrient-rich Southern Ocean and the adjacent oligotrophic gyre of the southern Indian Ocean, providing an ideal region to study changes in microbial productivity. Here, we measured the impact of C and N uptake on microbial community diversity, contextualized by hydrographic factors and local physico-chemical conditions across the Southern Ocean and southern Indian Ocean. We observed that contrasting physico-chemical characteristics led to unique microbial diversity patterns, with significant correlations between microbial alpha diversity and primary productivity (PP). However, we detected no link between specific PP (PP normalized by chlorophyll-a concentration) and microbial alpha and beta diversity. Prokaryotic alpha and beta diversity were correlated with biological N2 fixation, which is itself a prokaryotic process, and we detected measurable N2 fixation to 60◦S. While regional water masses have distinct microbial genetic fingerprints in both the eukaryotic and prokaryotic fractions, PP and N2 fixation vary more gradually and regionally. This suggests that microbial phylogenetic diversity is more strongly bounded by physical oceanographic features, while microbial activity responds more to chemical factors. We conclude that concomitant assessments of microbial diversity and activity are central to understanding the dynamics and complex responses of microorganisms to a changing ocean environment.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 5
    Publication Date: 2021-11-16
    Description: Ocean currents, fronts, and eddies shape the distribution of phylogenetic and functional microbial biodiversity, sustaining a mosaic of ecosystem structures with both high and low productivity. Major sampling campaigns have created a wealth of knowledge about the Atlantic microbiome; however, we lack in-depth understanding of how microbial diversity and primary productivity covary at fine spatial scales (~10-100 km). Here, we present results from an Atlantic Ocean transect ( ~50°S - 50°N), sampled at every ~0.5° latitude. We combined in-situ rate measurements of primary productivity, 16S and 18S rRNA gene sequencing, and physicochemical analyses to investigate associations between hydrography and microbial diversity We detected boundaries of ecological regions - partially coincident with Longhurst provinces – with high and low chl a signatures. Eukaryotic autotrophs and prokaryotic heterotrophs showed higher beta diversity in high chl a provinces, while beta diversity of mixotrophs, cyanobacteria and eukaryotic heterotrophs was higher in low chl a provinces. Additionally, we calculated productivity-specific length scales to assess key dimensions of biological-physical coupling across our transect. We observed a link between advection driven by surface currents and patchiness of microbial diversity signals within provinces. Our integrative approach suggests that evaluating trophically disaggregated diversity alongside productivity and advection will improve our understanding of the mosaic nature of microbial provincialism.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 6
    Publication Date: 2021-11-16
    Description: This perspective outlines how authors of ocean methods, guides, and standards can harmonize their work across the scientific community. We reflect on how documentation practices can be linked to modern information technologies to improve discoverability, interlinkages, and thus the evolution of distributed methods into common best practices within the ocean community. To show how our perspectives can be turned into action, we link them to guidance on using the IOC-UNESCO Ocean Best Practice System to support increased collaboration and reproducibility during and beyond the UN Decade of Ocean Sciences for Sustainable Development.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 7
    Publication Date: 2021-11-16
    Description: IOC Manuals and Guides, 84 Abstract Ever-increasing complexity and multi-dimensionality of ocean investigations present a challenge for the ocean community as we collaboratively (co-)develop methods to research, monitor, and use our oceans. To support transparent sharing of methods, and ultimately agree on best practices in ocean research, operations, and application, the IOC Ocean Best Practices System (OBPS) was initially developed as an Ocean Data Standards project deliverable of the International Oceanographic Data Exchange (IODE) who in 2017 joined with the AtlantOS/ODIP/RCN Best Practices Working Group (BPWG) to develop it into a System. In 2019 the IOC Ocean Best Practices System was approved as a UNESCO/Intergovernmental Oceanographic Commission (IOC) Project, jointly funded by the IODE and GOOS Programmes. In this document, we provide guidance on how to best use the OBPS templates, allowing greater discovery, machine readability, sharing, and understandability of methods and best practices. We clarify how to optimally populate the different sections of an OBPS template, and describe how those sections support the evolution of each OBPS submission, towards a global best practice. Further, we discuss some general challenges in developing methods into community-accepted best practices. While this document focuses on the OBPS, it also offers a perspective on the general challenge of structuring and harmonising method documentation. We invite the community to provide feedback on this document (link to Community review), to contribute towards a generalised best practice for advanced methodological management across the ocean community.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
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