Search publications of the members of the Royal Belgian institute of natural Sciences
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Antarctic biology: scale matters
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Toward a Harmonization for Using in situ Nutrient Sensors in the Marine Environment
- Improved comparability of nutrient concentrations in seawater is required to enhance the quality and utility of measurements reported to global databases. Significant progress has been made over recent decades in improving the analysis and data quality for traditional laboratory measurements of nutrients. Similar efforts are required to establish high-quality data outputs from in situ nutrient sensors, which are rapidly becoming integral components of ocean observing systems. This paper suggests using the good practices routine established for laboratory reference methods to propose a harmonized set of deployment protocols and of quality control procedures for nutrient measurements obtained from in situ sensors. These procedures are intended to establish a framework to standardize the technical and analytical controls carried out on the three main types of in situ nutrient sensors currently available (wet chemical analyzers, ultraviolet optical sensors, electrochemical sensors) for their deployments on all kinds of platform. The routine reference controls that can be applied to the sensors are listed for each step of sensor use: initial qualification under controlled conditions in the laboratory, preparation of the sensor before deployment, field deployment and finally the sensor recovery. The fundamental principles applied to the laboratory reference method are then reviewed in terms of the calibration protocol, instrumental interferences, environmental interferences, external controls, and method performance assessment. Data corrections (linearity, sensitivity, drifts, interferences and outliers) are finally identified along with the concepts and calculations for qualification for both real time and time delayed data. This paper emphasizes the necessity of future collaborations between research groups, reference-accredited laboratories, and technology developers, to maintain comparability of the concentrations reported for the various nutrient parameters measured by in situ sensors.
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On the arachnofauna of the Jean Massart botanical garden (Brussels-Capital Region, Belgium)
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Two new species of Spiniphiline (Gastropoda: Cephalaspidea) from the Middle and Eastern Atlantic Ocean
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A Review of Species in Fusceulima (Gastropoda: Eulimidae) from the NE Atlantic Ocean and the Western Mediterranean Sea with Illustration of Key Type Specimens
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Didelphodus caloris, new species (Mammalia, Cimolesta), from the Wasatchian Wa-0 fauna of the Paleocene-Eocene Thermal Maximum, Clarks Fork Basin, Wyoming
- The Wasatchian Wa-0 mammalian fauna from the Paleocene-Eocene Thermal Maximum (earliest Eocene) is reasonably well sampled in North America, but mammals of small body size are still poorly known. Here we describe a new species of the insectivore Didelphodus based on a cranial rostrum, both dentaries, and a nearly complete upper and lower dentition, all found by screen-washing. The new species, D. caloris, is the oldest species of the genus known in North America. It differs from later early Eocene Didelphodus in being substantially smaller, in having relatively simple premolars, and in having a more reduced M3 relative to preceding molars. Precursors of Didelphodus are not known with certainty, and the species D. caloris may be an immigrant to mid-continent North America. D. caloris is tentatively interpreted as a dwarfed form like other Wa-0 mammals because of its small size relative to the better-known successor species D. absarokae.
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Les restes humains de la fortification
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Présence d'un gecko dans l'Eocène basal de Dormaal (Belgique): un élément thermophile du PETM ?
- Si le registre fossile des lézards est assez bon pour l’Eocène moyen et supérieur en Europe, il n’en va pas de même pour l’Eocène inférieur. Seule la localité de Dormaal, datant de l’Eocène basal (niveau-repère MP7,Belgique) semble faire exception. Parmi les nombreux fossiles de lézards de cette localité, nous présentons ici pour la première fois quelques rares éléments appartenant à un gecko. Ce dernier vivait donc dans nos régions durant le Maximum Thermique Paléocène-Eocène (PETM), climat le plus chaud des 66 derniers millions d’années. Ce nouveau taxon, daté de 56 Ma, est le plus ancien gecko cénozoïque connu en Europe. Avec Laonogekko lefevrei de Prémontré (MP 10, Bassin de Paris), plus jeune d’environ 5 millions d’années, ces taxons forment la radiation du Paléogène inférieur de ce clade. Aujourd’hui, les geckos sont répartis dans le monde entier, principalement dans les zones tempérées chaudes à tropicales, bien que certaines espèces puissent atteindre des régions plus froides dans les hémisphères Nord et Sud. Le nouveau gecko de Dormaal représente un élément thermophile, confirmant les préférences thermiques actuelles des geckos. Par ailleurs, la distribution de ce groupe dans des latitudes aussi septentrionales (au-dessus de 50° Nord) n’est pas surprenante durant cette période particulièrement chaude. Bien que le nouveau taxon décrit ici ne soit représenté que par un frontal et des dentaires (deux des éléments les plus fréquemment préservés chez les geckos fossiles), il fournit un nouveau record de diversité des squamates à la base de l’Eocène. Avec Yantarogekko de l’ambre éocène de la Baltique (district de Kaliningrad, nord-ouest de la Russie), ces geckos documentent la distribution septentrionale des geckos en Europe pendant l’Éocène.
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État de l’invasion de Trichoferus campestris (Faldermann, 1835) au plan international et réflexion sur sa première interception en Belgique
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The initial response of females towards congeneric males matches the propensity to hybridise in Ophthalmotilapia
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Further notes on H. cinerea (Born, 1778) and H. stylata (Hinds, 1844) (Conoidea: Terebridae), with the description of a new species from the Dominican Republic
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Notes on some Japanese and East China Sea Duplicaria (Gastropoda: Conoidea) with the description of a new species
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Notes on Terebridae Part I, with the description of two new species
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'Cleaning the Egyptian sphinx with a toothbrush': one of the largest Neoterebra (Gastropoda: Conoidea) from the Caribbean Sea needs a name
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Hastula strigilata revisited: Part II. Tropical Indo-Pacific, first preliminary results, evaluation of types and synonymy, with the description of nine new species (Gastropoda: Conoidea: Terebridae)
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Insights into Holocene relative sea-level changes in the southern North Sea using SLIPs and an improved microfauna-based transfer function.
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Reconstructing Holocene relative sea-level changes and extreme events in the Shetland Islands (United Kingdom).
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Luminescence dating of offshore tsunami deposits from the Shetland Islands (UK).
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Reconstructing Holocene relative sea-level changes and extreme events in the Shetland Islands (United Kingdom).
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Storegga and beyond – North Sea tsunami deposits offshore Shetland Islands.
