32181 research outputs found
Sort by
Zeegevoel: De proper strand lopers
Get PDFBeeld je een dag in aan zee. Genieten van de ondergaande zon, het zicht op een vissersboot die z’n netten ophaalt of lachende kindjes die schelpjes, messen en lege kokkels verzamelen in een emmertje … Helaas is vooral dit laatste idyllisch beeld vandaag soms ver te zoeken. Niet dat er tegenwoordig niets meer te rapen valt op onze Vlaamse stranden. Alleen ruimen schelpen steeds meer de plaats voor plastic pellets, ballonnen, snoeppapiertjes, visserijafval, plastic bidons, wegwerpplastic en allerhande verpakkingen. Het is soms letterlijk zigzaggen tussen het plastic. Dit viel ook enkele hardlopers op en het idee groeide om tijdens hun hardloopsessies strandafval te ruimen. De start van de ‘Proper Strand Lopers’
Goed doel: Toponderzoek gesteund
Get PDFHet VLIZ reikte in 2017 voor het eerst, dankzij filantropie-inkomsten, beurzen uit voor ‘Brilliant Marine Research Ideas’ (BMRI). De beurs ter waarde van 5.000 EUR stimuleert jonge onderzoekers aan een Vlaamse universiteit of hogeschool om buitengewone ideeën te verkennen en ‘out of the box’ te denken. In 2017 vielen vier wetenschappers in de prijzen
Kaderrichtlijn Mariene Strategie. Beschrijvend element 6: Zeebodemintegriteit. Ruimtelijke analyse fysisch verlies en fysische verstoring
Get PDFCorrigendum to “Interpreting the librations of a synchronous satellite – How their phase assesses Mimas’ global ocean” [Icarus 282 (2017) 276–289]
Get PDFA mistake appeared in the original paper, which propagated. This affects the phase of the diurnal libration. The conclusions are unchanged
Design and results of the ice sheet model initialisation initMIP-Greenland: an ISMIP6 intercomparison
Get PDFEarlier large-scale Greenland ice sheet sea-level projections (e.g. those run during the ice2sea and SeaRISE initiatives) have shown that ice sheet initial conditions have a large effect on the projections and give rise to important uncertainties. The goal of this initMIP-Greenland intercomparison exercise is to compare, evaluate, and improve the initialisation techniques used in the ice sheet modelling community and to estimate the associated uncertainties in modelled mass changes. initMIP-Greenland is the first in a series of ice sheet model intercomparison activities within ISMIP6 (the Ice Sheet Model Intercomparison Project for CMIP6), which is the primary activity within the Coupled Model Intercomparison Project Phase 6 (CMIP6) focusing on the ice sheets. Two experiments for the large-scale Greenland ice sheet have been designed to allow intercomparison between participating models of (1) the initial present-day state of the ice sheet and (2) the response in two idealised forward experiments. The forward experiments serve to evaluate the initialisation in terms of model drift (forward run without additional forcing) and in response to a large perturbation (prescribed surface mass balance anomaly); they should not be interpreted as sea-level projections. We present and discuss results that highlight the diversity of data sets, boundary conditions, and initialisation techniques used in the community to generate initial states of the Greenland ice sheet. We find good agreement across the ensemble for the dynamic response to surface mass balance changes in areas where the simulated ice sheets overlap but differences arising from the initial size of the ice sheet. The model drift in the control experiment is reduced for models that participated in earlier intercomparison exercises
Experimental infection model for vibriosis in Dover sole (<i>Solea solea</i>) larvae as an aid in studying its pathogenesis and alternative treatments
Get PDFSevere economic losses due to diseases in marine larviculture may be linked to vibriosis. To better understand the pathogenesis of vibriosis and evaluate new ways to prevent and combat this important disease, there is a great need for reliable and reproducible experimental infection models. The present study aimed at developing a challenge model for vibriosis in Dover sole larvae and testing its applicability to study the effect of the probiotic treatment. For that purpose, larvae were challenged at 10 days post hatching with Vibrio anguillarum WT, V. anguillarum HI610 or V. harveyi WT. Following administration of V. anguillarum WT via immersion at 1 × 107 colony forming units/mL, a larval mortality of 50% was observed at 17 days post-inoculation. In a next step, the probiotic potential of 371 isolates retrieved from Dover sole was assessed by screening for their inhibitory effects against Vibrio spp. and absence of haemolytic activity. One remaining isolate (V. proteolyticus) and V. lentus, known for its protective characteristics in seabass larvae, were further tested in vivo by means of the pinpointed experimental infection model. Neither isolate provided via the water or feed proved to be protective for the Dover sole larvae against challenge with V. anguillarum WT. This developed challenge model constitutes a firm basis to expedite basic and applied research regarding the pathogenesis and treatment of vibriosis as well as for studying the impact of (a)biotic components on larval health
Automated techniques to follow the spatial distribution of <i>Phaeocystis globosa</i> and diatoms spring blooms in the Channel and North Sea
Get PDFBiological characteristics modulating the sensitivity of calcification to ocean acidification: comparative approach in echinoderms
Get PDFThe increase of the atmospheric carbon dioxide concentration, due to human activities, induces changes in ocean chemistry, namely a decrease in carbonate concentration and an increase in proton concentration. These two phenomena are called Ocean Acidification (OA). In Metazoa, different physiological processes, including calcification, can be affected by this acidification. However, the magnitude of the OA impact differs according to taxa or even within taxa. Several hypotheses about the mechanisms behind these differences were proposed: (1) contrasted acidbase physiologies, (2) differences in variability of the original habitats, (3) differences in the quality or quantity of available foods. For instance, in echinoderms, a taxon provided with a welldeveloped high-magnesium calcite skeleton, the calcification process is affected by OA but at different degrees according to the considered species. The goal of the present study is to assess the importance of different biological characteristics which could modulate the sensitivity of calcification to OA in Metazoa. A comparative approach using different postmetamorphic echinoderms with contrasted acid-base physiologies and food sources and originating from contrasted habitats (variable or stable) is developed. Studied organisms principally come from long term OA experiments and natural CO2 vents. The significance of the considered factor is determined by comparing the effects of OA on the skeleton of echinoderms with contrasted characteristics for this factor. The effects on the skeleton is studied at the morphological, mechanical and calcification gene expression levels
