Search publications of the members of the Royal Belgian institute of natural Sciences
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Application of the high resolution model for the Princess Elisabeth Zone
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Remarks of external experts on the simulations with morphodynamic models to assess the impacts of an artificial island on the seabed sediments and sediment dispersal
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Residual currents and transports near the C-Power and Norther wind farms
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Seabed CommUnity Initiative: communicating sustainability challenges of marine sand use in a changing world <Seabed4U>. Final Report.
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4 Zand- en grindwinning. In: Compendium voor Kust en Zee.
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4 Sand and gravel extraction. In: Compendium for Coast and Sea
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Monitoring the impact of the extraction of marine aggregates, in casu sand, in the zone of the Hinder Banks. Scientific Report 7-8, 2020-2021.
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OUTFLOW Annual Network Report, 15/04/2021-15/04/2022
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Zeespiegelstijging voor Vlaanderen.
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Two new non-marine species of the subfamily Cypridopsinae Kaufmann, 1900 (Crustacea, Ostracoda) from sourthern Africa
- Two new Cypridopsinae ostracods, Potamocypris meissneri sp. nov. and Sarscypridopsis harundineti sp. nov. are described. Both were found only as asexual (all-female) populations in temporary waters of southern Africa. Potamocypris meissneri was collected from a small pan in the North-West Province of South Africa. It is approximately 0.5 mm long and belongs to the species group with long swimming setae on the second antennae. However, the species has a somewhat isolated position in the genus owing to the conspicuously reticulated carapace, which is furthermore densely covered by prominent conuli with normal pores carrying long sensilla, as well as to the wide anterior and posterior flanges on the left valve. To allow identification of the new species in relation to its closest congeners, a key to the species of the genus Potamocypris Brady, 1870 from southern Africa is provided. The genus Sarscypridopsis McKenzie, 1977 mostly has an Afrotropical distribution with only few species occurring in other regions. Sarscypridopsis harundineti was collected from floodplains of the outskirts of the Okavango Delta in Botswana. It is approximately 0.4 mm long and can be distinguished from congeners mainly by the smaller and more oval-shaped valves. We conclude that southern African Cypridopsinae urgently need integrated taxonomic revision, by means of both morphological characters and DNA-sequence data.
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Macrophyte life forms influence the effects of environmental and spatial factors on the beta-diversity of associated ostracod communities (Crustacea).
- Beta-diversity measures have been used to understand patterns of community distribution in natural ecosystems. Recent studies included different facets of beta-diversity analyses, e.g. trait- and phylogeny-based. Here, we used ostracod communities to evaluate the influence of environmental and spatial factors structuring different facets of beta-diversity and their components (Beta-total, replacement and richness-difference) of ostracod communities associated with different macrophyte life forms. We test the hypotheses (1) that the influence of environmental factors is higher for ostracod beta-diversity facets of communities associated with submerged plants compared to emergent and floating plants and (2) that the influence of spatial factors is higher in communities associated with rooted, compared to non-rooted plants. Ostracods were sampled from five life forms of macrophytes, including emergent, rooted floating, rooted submerged, free submerged and free floating in 25 floodplain lakes. Our results showed that the environmental factors turned out to be important for all beta-diversity facets of ostracod communities, mainly for those associated with submerged macrophytes, thus corroborating the first hypothesis. We also found that spatial factors’ influence on ostracod beta-diversity was not related to whether the plant is rooted or not, thus refuting our second hypothesis. We also found differences in factors structuring each of the beta-diversity facets, showing the importance to include these three approaches (species-, traits- and phylogeny-based) in ecological surveys. Finally, we highlight the importance of considering different macrophyte life forms in biodiversity surveys for the preservation and management of the diversity of these plants and their associated communities.
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Water chemistry and not urbanization influences community structure of non-marine Ostracoda (Crustacea) in northern Belgium
- Urbanization is one of the major causes of the destruction of natural habitats in the world. Cities are urban heat islands and can thus significantly influence populations of plants and animals. The research project SPEEDY investigated the effects of urbanization in northern Belgium with a nested sampling design at local and landscape scales for a variety of organisms. Here, we tested the effects of urbanization on non-marine ostracod communities, sampling 81 small pools in three urbanization categories, as defined by percentage built up cover (low, intermediate, high). We identified 17 ostracod species, together occurring in 60 of the 81 sampled pools. We found that urbanization per se had no significant effect on ostracod communities. Of all the measured local factors, ammonium and total phosphorus concentrations had a significant effect on the community structure. In contrast, water temperature had no significant effect, most likely because the ostracod species found in northern Belgium in the present survey mostly have wide temperature tolerances.
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Safeguarding Freshwater Life Beyond 2021: Recommendations for the new Global Biodiversity Framework from the European Experience.
- Plans are currently being drafted for the next decade of action on biodiversity—both the post-2020 Global Biodiversity Framework of the Convention on Biological Diversity (CBD) and Biodiversity Strategy of the European Union (EU). Freshwater biodiversity is disproportionately threatened and underprioritized relative to the marine and terrestrial biota, despite supporting a richness of species and ecosystems with their own intrinsic value and providing multiple essential ecosystem services. Future policies and strategies must have a greater focus on the unique ecology of freshwater life and its multiple threats, and now is a critical time to reflect on how this may be achieved. We identify priority topics including environmental flows, water quality, invasive species, integrated water resources management, strategic conservation planning, and emerging technologies for freshwater ecosystem monitoring. We synthesize these topics with decades of first-hand experience and recent literature into 14 special recommendations for global freshwater biodiversity conservation based on the successes and setbacks of European policy, management, and research. Applying and following these recommendations will inform and enhance the ability of global and European post-2020 biodiversity agreements to halt and reverse the rapid global decline of freshwater biodiversity.
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Holocene Climate Variability in the Near East and its Impact on the History of Civilisation
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Coastal coarse-clast deposits from storms vs. tsunamis
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Klimadynamik und Küstenveränderungen – Einfluss auf die Kulturgeschichte Mesopotamiens
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The Holocene palaeolake of Tayma – A key site for unravelling palaeoclimate, with implications for Neolithic incursions and “oasisation” on the northern Arabian Peninsula
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Die holozäne Feuchtphase auf der Arabischen Halbinsel und Implikationen für die Entstehung der Oasenkultur
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La conservation des holothuries aspidochirotes dans les eaux du littoral kenyan
- Les holothuries aspidochirotes (Échinodermes : Holothurides) font l’objet d’une pêche intensive dans les eaux du littoral kenyan et les stocks fondent comme neige au soleil. Afin de protéger et de gérer ces ressources naturelles, il convient d’élaborer des programmes de conservation et de gestion. Or, une telle entreprise nécessite la réalisation d’études rigoureuses et informatives dans différents domaines. Ce document s’attarde sur les cinq niveaux de compréhension nécessaires à l’élaboration d’un programme adapté à la conservation des holothuries en Afrique orientale.
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A 1500 years-record of North Atlantic storminess from the Shetland Islands (UK) – preliminary insights
