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  • 2020-2024  (167,586)
  • 2010-2014  (3,085,455)
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  • 1
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    Watching Out for Coral Reefs With Forams (2024)
    Frontiers Media SA
    In:  Frontiers for Young Minds vol. 12 no. 1122119 |
    Details
    Publication Date: 2024-07-03
    Description: Lots of creatures live in coral reefs, including some tiny ones you might never have heard of. In this article, we will tell you about the importance of Foraminifera (also called forams), unicellular organisms with shells, that contribute to coral reefs in many ways. Just like corals, some forams living on the seafloor live closely together with microalgae. Some forams also thrive in similar environmental conditions (sunlight, temperature, salt) as corals. For this reason, forams can be used as reef “sensors”, to keep track of the overall health of coral reefs. They can even help to detect poor environmental conditions that might harm coral growth in the future. In this article, we will look at a study of an Indonesian reef ecosystem in which the foram communities living on the seafloor were monitored between 1997 and 2018.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 2
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    Asplenium alleniae (Aspleniaceae), a new fern species from Borneo and New Guinea (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 65 no. 3, pp. 219-223
    Details
    Publication Date: 2024-07-03
    Description: A new species, Asplenium alleniae, is described from high elevation habitats in Sabah (Malaysia) and Papua New Guinea. Previous phylogenetic analyses of chloroplast loci determined that A. alleniae was most closely related to A. pauperequitum from New Zealand. Asplenium alleniae differs from A. pauperequitum most obviously by the acuminate apices of its longer pinnae. The combination of pinnate fronds with few pairs of primary pinnae and dark red-brown axes distinguishes A. alleniae from superficially similar species of Asplenium in Malesia. Asplenium alleniae is provisionally assessed as Endangered.
    Keywords: Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; conservation ; Malaysia ; Malesia ; Mount Kinabalu ; Papua New Guinea ; Sabah ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Aurantoside L, a New Tetramic Acid Glycoside with Anti-Leishmanial Activity Isolated from the Marine Sponge Siliquariaspongia japonica (2024)
    In:  Marine Drugs vol. 22 no. 4
    Details
    Publication Date: 2024-07-03
    Description: A new tetramic acid glycoside, aurantoside L (1), was isolated from the sponge Siliquariaspongia japonica collected at Tsushima Is., Nagasaki Prefecture, Japan. The structure of aurantoside L (1) composed of a tetramic acid bearing a chlorinated polyene system and a trisaccharide part was elucidated using spectral analysis. Aurantoside L (1) showed anti-parasitic activity against L. amazonensis with an IC50 value of 0.74 μM.
    Keywords: aurantosides ; Siliquariaspongia japonica ; marine sponge ; nuclear magnetic resonance ; mass ; spectrometry ; anti-leishmanial activity ; marine natural products
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
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    Prototype Biodiversity Digital Twin: Invasive Alien Species (2024)
    In:  Research Ideas and Outcomes vol. 10 no. e124579
    Details
    Publication Date: 2024-07-03
    Description: Invasive alien species (IAS) threaten biodiversity and human well-being. These threats may increase in the future, necessitating accurate projections of potential locations and the extent of invasions. The main aim of the IAS prototype Digital Twin (IAS pDT) is to dynamically project the level of plant invasion at habitat level across Europe under current and future climates using joint species distribution models. The pDT detects updates in data sources and versions of the datasets and model outputs, implementing the FAIR principles. The pDT’s outputs will be available via an interactive dashboard. All input and output data will be freely accessible.
    Keywords: Invasive alien species ; Digital Twin ; climate change ; joint species distribution models ; Dynamic Data-Driven Application Systems ; workflows
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    Mitochondrial cytochrome c oxidase subunit I (COI) metabarcoding of Foraminifera communities using taxon-specific primers (2022)
    PeerJ
    In:  PeerJ vol. 10 no. e13952
    Details
    Publication Date: 2024-07-03
    Description: Foraminifera are a species-rich phylum of rhizarian protists that are highly abundant in most marine environments. Molecular methods such as metabarcoding have revealed a high, yet undescribed diversity of Foraminifera. However, so far only one molecular marker, the 18S ribosomal RNA, was available for metabarcoding studies on Foraminifera. Primers that allow amplification of foraminiferal mitochondrial cytochrome oxidase I (COI) and identification of Foraminifera species were recently published. Here we test the performance of these primers for the amplification of whole foraminiferal communities, and compare their performance to that of the highly degenerate LerayXT primers, which amplify the same COI region in a wide range of eukaryotes. We applied metabarcoding to 48 samples taken along three transects spanning a North Sea beach in the Netherlands from dunes to the low tide level, and analysed both sediment samples and meiofauna samples, which contained taxa between 42 mm and 1 mm in body size obtained by decantation from sand samples. We used single-cell metabarcoding (Girard et al., 2022) to generate a COI reference library containing 32 species of Foraminifera, and used this to taxonomically annotate our community metabarcoding data. Our analyses show that the highly degenerate LerayXT primers do not amplify Foraminifera, while the Foraminifera primers are highly Foraminifera- specific, with about 90% of reads assigned to Foraminifera and amplifying taxa from all major groups, i.e., monothalamids, Globothalamea, and Tubothalamea. We identified 176 Foraminifera ASVs and found a change in Foraminifera community composition along the beach transects from high tide to low tide level, and a dominance of single-chambered monothalamid Foraminifera. Our results highlight that COI metabarcoding can be a powerful tool for assessing Foraminiferal communities.
    Keywords: Foraminifera ; Metabarcoding ; Beach ; Community composition ; Intertidal ; Molecular ; biodiversity
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 6
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    Measurements of pCO2 and turbulence from an autonomous drifting buoy in 2019 during FALKOR cruise FK191120 (2022)
    PANGAEA
    Details
    Publication Date: 2024-07-02
    Description: Data from autonomous, drifting buoy with a floating chamber to measure insitu air-sea carbon dioxide (CO2) fluxes during RV Falkor cruise FK191120 in the southern Pacific during November-December 2019. The technique is described in detail in Ribas-Ribas et al. (2018) (https://doi.org/10.1525/elementa.275). The buoy is equipped with a sensor to measure aqueous and atmospheric partial pressure of CO2 (pCO2), and to monitor the increase or loss of CO2 inside the chamber. One complete cycle including two chamber measurements last 70 minutes. The buoy can be deployed for more than 15 hours, and at wind speeds of up to 10 m/s. Floating chambers are known to overestimate fluxes due to the creation of additional turbulence at the water surface. We check that by measuring turbulence with two Acoustic Doppler Velocimeter (ADV), one directly underneath the center of the floating chamber (equipped with an inertial motion unit) and the other one positioned sideways to measure turbulence outside the perimeter of the buoy.
    Keywords: Air-sea CO2 flux; CµC; Carbon microcycle: CO2 gradients in the ocean surface; gas exchange; gas transfer velocity; marine carbon cycle; ocean technology; Pacific Ocean; partial pressure of carbon dioxide
    Type: Dataset
    Format: application/zip, 9 datasets
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  • 7
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    Intact phospholipid and fatty acid compositions in the digestive system of Antarctic krill, Euphausia superba, sampled in January, March and May (2023)
    PANGAEA
    Details
    Publication Date: 2024-07-02
    Description: This dataset contains the seasonal composition of intact phospholipids as well as of free fatty acids from the digestive system of Antarctic krill, Euphausia superba. Krill was caught with a continuous krill pumping system in May of 2021 in the Bransfield Strait and in January and March of 2022 at the South Orkney Islands. The stomach, digestive gland and hind gut were dissected and analysed individually. Samples were extracted with an optimized Bligh&Dyer protocol. Intact phospholipids were measured with liquid chromatography - high-resolution mass spectrometry on an Orbitrap mass spectrometer. Identification of intact phospholipids was based on characteristic fragments of the head group in MS2 experiments in positive electrospray ionization mode, while the fatty acid composition of intact phospholipids were determined by characteristic fragments occurring during MS2 measurements with negative electrospray ionization. Free fatty acids from the total lipid extract were measured as methyl esters were via gas chromatography - mass spectrometry and identified with standards and based on their retention order.
    Keywords: Antarctic krill; Antarctic Peninsula; Euphausia superba; fatty acids; Intact phospholipids; liquid chromatography high-resolution mass spectrometry; Phosphatidylcholine; Phosphatidylethanolamine; Southern Ocean; Very long chain polyunsaturated fatty acids
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    Osmolyte and fitness parameters of marine invertebrates exposed to low salinity in the laboratory (2023)
    PANGAEA
    Details
    Publication Date: 2024-07-02
    Description: Low-salinity stress can severely affect the fitness of marine organisms. As desalination has been predicted for many coastal areas with ongoing climate change, it is crucial to gain more insight in mechanisms that constrain salinity acclimation ability. Low-salinity induced depletion of the organic osmolyte pool has been suggested to set a critical boundary in osmoconforming marine invertebrates. Whether inorganic ions also play a persistent role during low-salinity acclimation processes is currently inconclusive. We investigated the salinity tolerance of six marine invertebrate species following a four-week acclimation period around their low-salinity tolerance threshold. The species investigated were Asterias rubens, Mytilus edulis, Littorina littorea, Diadumene lineata, Strongylocentrotus droebachiensis and Psammechinus milliaris. To obtain complete osmolyte budgets of seawater, body fluids and tissues we quantified total osmolality (via osmometer), organic osmolytes (methylamine and free amino acids) via 1H-NMR spectroscopy and inorganic osmolytes (anions and cations) via flame photometry and a novel protocol using ion-chromatography. We further determined the fitness proxies survival, growth and tissue water content. Our data show the importance of the organic and inorganic osmolyte pool during low-salinity acclimation. It also shows the importance of specific compounds in some species. This data can be used in future osmolyte and salinity tolerance research. This type of data is essential to establish reliable physiological limits of species in order to estimate consequences of future salinity changes with ongoing climate change. It can be used to assess the salinity tolerance capacity and to obtain a better understanding of the basic mechanisms that are utilized in a wide range of species. The established cellular inorganic and organic osmolyte profiles can build a foundation for applied cellular physiological research, for example for designing suitable buffers for in vitro assays as these buffers need to incorporate complex organic and inorganic osmolyte changes. Knowledge about cellular and whole-organism biochemistry and physiology is absolutely crucial for characterizing the functions of genes that are under selection by climate change stressors. A quantitative knowledge of cellular osmolyte systems is key to understand the evolution of euryhalinity and to characterize targets of selection during rapid adaptation to ongoing desalination.
    Keywords: cellular volume regulation; Climate change; invertebrates; Laboratory experiment; osmoconformer; osmolytes; osmoregulation; salinity tolerance
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    Continuous wave and tide observations (2021) at DynaCom artificial islands in the back-barrier tidal flat, Spiekeroog, Germany, 2021-01 to 2021-10 (2022)
    PANGAEA
    Details
    Publication Date: 2024-07-02
    Description: Data presented here were collected between January 2021 to October 2021 within the research unit DynaCom (Spatial community ecology in highly dynamic landscapes: From island biogeography to metaecosystems, https://uol.de/dynacom/ ) of the Universities of Oldenburg, Göttingen, and Münster, the iDiv Leipzig and the Nationalpark Niedersächsisches Wattenmeer. Experimental islands and saltmarsh enclosed plots were created in the back barrier tidal flat and in the saltmarsh zone of the island of Spiekeroog. Local tide and wave conditions were recorded with a RBRduo TDǀwave sensor (RBR Ltd., Ontario/Canada). The sensor was bottom mounted in a shallow tidal creek (0.78 m NHN) through a steel girder (buried 0.3m deep in the sediment) and was positioned 10 cm above sediment surface, as was determined by using a portable differential GPS. This resulted in the sensor falling dry during low tide. For accurate depth calculations, raw pressure data were manually corrected for atmospheric pressure derived from a locally installed weather station. The sensor was pre-calibrated by the manufacturer and the sampling rate was 3 Hz with 1024 samples per burst at a sample interval of 10 min. Recorded data were internally logged until the readout with the Ruskin (V1.13.13) software. Date and time is given in UTC. Data handling was performed according to Zielinski et al. (2018): Post-processing of collected data was done using MATLAB (R2018a). Quality control was performed by (a) erasing data covering maintenance activities, (b) removing outliers, and (c) visually checks. Low-tide data is not removed, but were easily identified through the manually calculated water depth data, where all depths 〈 0.05m represented low tide data.
    Keywords: BEFmate; biodiversity - ecosystem functioning; DynaCom; experimental islands; FOR 2716: Spatial community ecology in highly dynamic landscapes: from island biogeography to metaecosystems; ICBM; Institut für Chemie und Biologie des Meeres; Metacommunity; salt marsh; Spiekeroog; water level; wave
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 10
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    Dissolved organic matter molecular composition data and supporting metadata for multiple oceanographic cruises with RV SONNE (SO254, SO245, SO248) and RV POLARSTERN (PS79), Bermuda Atlantic Time-series Study and Hawaii Ocean Time-series (2023)
    PANGAEA
    Details
    Publication Date: 2024-07-02
    Description: This data includes the dissolved organic matter (DOM) molecular composition data obtained via Fourier-transform ion cyclotron resonance mass spectrometry and the accompanying metadata (cruise, station number, geographic coordinates, water depth, temperature, salinity and solid-phase extracted dissolved organic carbon concentrations (SPE-DOC)) for multiple oceanographic cruises (HOTS, BATS, SO254, SO245, SO248, ANT 28-II, ANT 28-IV, and 28-V). This data was analyzed in Bercovici et al., 2023 (https://doi.org/10.1029/2023GB007740). DOM composition data for the cruise SO245 was previously published in Osterholz et al., 2021 (https://doi.org/10.1016/j.marchem.2021.103955). In order to maximize comparability among data, we reanalyzed the same set of samples from SO245 on the FT-ICR-MS together with the samples from the other cruises and sites. SPE-DOC concentrations were determined on a Shimadzu TOC-VPCH total organic carbon analyzer. DOM composition was determined on a SolariX XR FT-ICR-MS (Bruker Daltonik GmbH, Bremen, Germany) equipped with a 15 Tesla superconducting magnet and an electrospray ionization source (ESI; Bruker Apollo II ion source). The metadata were compiled from the CTD bottle data of multiple cruises, some of which are available on PANGAEA at the following links: SO248: https://doi.org/10.1594/PANGAEA.864673, SO245: https://doi.org/10.1594/PANGAEA.890394, SO254: https://doi.org/10.1594/PANGAEA.890453.
    Keywords: Dissolved Organic Matter; Fourier-transform ion cyclotron mass spectrometry; Global Ocean; molecular composition
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
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