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  • Artikel  (5)
  • Forschungsdaten  (3)
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  • 1
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Ethene (ethylene; H2C = CH2) is one of a range of non-methane hydrocarbons (NMHC) that affect atmospheric chemistry and global climate. Ethene acts as a hormone in higher plants and its role in plant biochemistry, physiology and ecology has been the subject of extensive research. Ethene is also found in seawater, but despite evidence that marine microalgae and seaweeds can produce ethene directly, its production is generally attributed to photochemical breakdown of dissolved organic matter. Here we confirmed ethene production in cultured samples of the macroalga Ulva (Enteromorpha) intestinalis. Ethene levels increased substantially when samples acclimatized to low light conditions were transferred to high light, and ethene addition reduced chlorophyll levels by 30%. A range of potential inhibitors and inducers of ethene biosynthesis were tested. Evidence was found for ethene synthesis via the 1-aminocylopropane-1-acrylic acid (ACC) pathway and ACC oxidase activity was confirmed for cell-free extracts. Addition of acrylate, a potential ethene precursor in algae that contain the compatible solute dimethylsulphoniopropionate, doubled the ethene produced but no acrylate decarboxylase activity was found. Nonetheless the data support active production of ethene and we suggest ethene may play a multifaceted role in algae as it does in higher plants.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    [s.l.] : Macmillan Magazines Ltd.
    Nature 387 (1997), S. 894-897 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Marine plankton use a variety of defences against predators, some of which affect trophic structure and biogeochemistry. We have previously shown that, during grazing by the protozoan Oxyrrhis marina on the alga Emiliania huxleyi, dimethylsulphoniopropionate (DMSP) from the prey is converted to ...
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Publikationsdatum: 2019-12-19
    Beschreibung: “Infochemicals” (information-conveying chemicals) dominate much of the underwater communication in biological systems. They influence the movement and behavior of organisms, the ecological interactions between and across populations, and the trophic structure of marine food webs. However, relative to their terrestrial equivalents, the wider ecological and economic importance of marine infochemicals remains understudied and a concerted, cross-disciplinary effort is needed to reveal the full potential of marine chemical ecology. We highlight current challenges with specific examples and suggest how research on the chemical ecology of marine organisms could provide opportunities for implementing new management solutions for future “blue growth” (the sustainable use of ocean resources) and maintaining healthy marine ecosystems.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Publikationsdatum: 2022-10-18
    Beschreibung: © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in GigaScience 4 (2015): 27, doi:10.1186/s13742-015-0066-5.
    Beschreibung: Ocean Sampling Day was initiated by the EU-funded Micro B3 (Marine Microbial Biodiversity, Bioinformatics, Biotechnology) project to obtain a snapshot of the marine microbial biodiversity and function of the world’s oceans. It is a simultaneous global mega-sequencing campaign aiming to generate the largest standardized microbial data set in a single day. This will be achievable only through the coordinated efforts of an Ocean Sampling Day Consortium, supportive partnerships and networks between sites. This commentary outlines the establishment, function and aims of the Consortium and describes our vision for a sustainable study of marine microbial communities and their embedded functional traits.
    Beschreibung: This work was supported by the Micro B3 project, which is funded from the European Union’s Seventh Framework Programme (FP7; Joint Call OCEAN.2011‐2: Marine microbial diversity – new insights into marine ecosystems functioning and its biotechnological potential) under the grant agreement no 287589.
    Schlagwort(e): Ocean sampling day ; OSD ; Biodiversity ; Genomics ; Health index ; Bacteria ; Microorganism ; Metagenomics ; Marine ; Micro B3 ; Standards
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    facet.materialart.
    Unbekannt
    ELSEVIER SCIENCE BV
    In:  EPIC3Science of The Total Environment, ELSEVIER SCIENCE BV, pp. 154886-154886, ISSN: 0048-9697
    Publikationsdatum: 2022-11-28
    Beschreibung: Some of the highest microplastic concentrations in marine environments have been reported from the Fram Strait in the Arctic. This region supports a diverse ecosystem dependent on high concentrations of zooplankton at the base of the food web. Zooplankton samples were collected during research cruises using Bongo and MOCNESS nets in the boreal summers of 2018 and 2019. Using FTIR scanning spectroscopy in combination with an automated polymer identification approach, we show that all five species of Arctic zooplankton investigated had ingested microplastics. Amphipod species, found in surface waters or closely associated with sea ice, had ingested significantly more microplastic per individual (Themisto libellula: 1.8, Themisto abyssorrum: 1, Apherusa glacialis: 1) than copepod species (Calanus hyperboreus: 0.21, Calanus glacialis/finmarchicus: 0.01). The majority of microplastics ingested were below 50 μm in size, all were fragments and several different polymer types were present. We quantified microplastics in water samples collected at six of the same stations as the Calanus using an underway sampling system (inlet at 6.5 m water depth). Fragments of several polymer types and anthropogenic cellulosic fibres were present, with an average concentration of 7 microplastic particles (MP) L−1 (0–18.5 MP L−1). In comparison to the water samples, those microplastics found ingested by zooplankton were significantly smaller, highlighting that the smaller-sized microplastics were being selected for by the zooplankton. High levels of microplastic ingestion in zooplankton have been associated with negative effects on growth, development, and fecundity. As Arctic zooplankton only have a short window of biological productivity, any negative effect could have broad consequences. As global plastic consumption continues to increase and climate change continues to reduce sea ice cover, releasing ice-bound microplastics and leaving ice free areas open to exploitation, the Arctic could be exposed to further plastic pollution which could place additional strain on this fragile ecosystem.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Publikationsdatum: 2023-01-13
    Beschreibung: This dataset contains 5 TAB-delimited TEXT files: (i) measured net DMS production (nmol g-1 anemone dry weight after 48h incubation) from bleached (Ble, n=12) and symbiotic (Sym, n=12) individuals of the sea anemone Aiptasia sp. under light and dark conditions (n=6 for each condition), (ii) simulated gross DMS production (µmol g-1 anemone dry weight after 48h incubation) (n=500), (iii) simulated net/gross DMS production ratio (unitless) (n=500), (iv) simulated sea-to-air DMS flux (µmol m-2 coral surface area d-1) from coral reefs (n=500), and (v) sensitivity values and respective standard errors (se) for each of the parameters fed into the simulation framework. All simulations in each file are Monte-Carlo-based after Latin Hypercube Sampling. For more information about parameter descriptions as well as on how the data were collected and simulated see the publication.
    Schlagwort(e): File format; File name; File size; Uniform resource locator/link to file
    Materialart: Dataset
    Format: text/tab-separated-values, 20 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Publikationsdatum: 2023-07-11
    Beschreibung: Zooplankton (amphipod and copepod) were collected using nets in the Fram Strait and the Arctic, in July 2018 and August 2019 for microplastic analysis. Water samples were also collected from the underway system and CTD alongside the August 2019 zooplankton samples (https://doi.pangaea.de/10.1594/PANGAEA.950239). All samples were initially digested using a homogenising solution and then filtered in preparation for Fourier Transform Infrared spectroscopy (FTIR) analysis in combination with an automated polymer identification approach (SIMPLE software) to identify polymer types, shape and size. Microplastics were also visualised using a microscope to further determine shape and size, particularly of fibres. Data collected on the microplastics found includes polymer type, shape, size, species ingestion and location.
    Schlagwort(e): Amphipoda; Arctic; Bioavailability; BONGO; Bongo net; copepod; CTD/Rosette; CTD-RO; Depth, bottom/max; Depth, top/min; Event label; Fourier Transform Infrared spectroscopy (FTIR) in combination with automated polymer identification [SIMPLE software]; FRAM; Fram Strait; FRontiers in Arctic marine Monitoring; FTIR SIMPLE software; James Clark Ross; JR18007; JR18007_11; JR18007_130; JR18007_57; JR18007_97; LATITUDE; Length, maximal; Light frame on-sight keyspecies investigation; LOKI; LONGITUDE; marine litter; microplastic ingestion; Microplastics; MSN; MSN150; Multiple opening/closing net; Multiple opening/closing net, 150 µm meshsize; Number of individuals; PARCA; Particle camera; Plastic pollution; Polarstern; Polymer; PS114; PS114_4-1; PS114_4-2; PS114_4-5; PS114_4-6; PS114_46-7; PS114_46-8; PS114_4-7; PS114_4-8; PS114_4-9; PS114_9-3; PS114_9-4; PS114_9-5; Quality level; Sample ID; Size fraction; Species; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); Type
    Materialart: Dataset
    Format: text/tab-separated-values, 704 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Publikationsdatum: 2023-07-11
    Beschreibung: This dataset presents microplastics in water samples collected from the underway system and CTD alongside the August 2019 zooplankton samples presented in https://doi.pangaea.de/10.1594/PANGAEA.950296. These samples were initially digested using a homogenising solution and then filtered in preparation for Fourier Transform Infrared spectroscopy (FTIR) analysis in combination with an automated polymer identification approach (SIMPLE software) to identify polymer types, shape and size. Microplastics were also visualised using a microscope to further determine shape and size, particularly of fibres. Data collected on the microplastics found includes; polymer type, shape, size, species ingestion and location.
    Schlagwort(e): Amphipoda; Arctic; Bioavailability; BONGO; Bongo net; copepod; DEPTH, water; Event label; Fourier Transform Infrared spectroscopy (FTIR) in combination with automated polymer identification [SIMPLE software]; FRAM; Fram Strait; FRontiers in Arctic marine Monitoring; FTIR SIMPLE software; James Clark Ross; JR18007; JR18007_11; JR18007_57; JR18007_60; JR18007_75; JR18007_97; LATITUDE; Length, maximal; LONGITUDE; marine litter; microplastic ingestion; Microplastics; MSN150; Multiple opening/closing net, 150 µm meshsize; Plastic pollution; Polymer; Quality level; Size fraction; Type
    Materialart: Dataset
    Format: text/tab-separated-values, 368 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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