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Diversity of strophomenid, orthotedid and orthid brachiopods in the Uppermost Famennian (“Strunian"; Upper Devonian) of the Avesnois (Northern France)
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In order to contribute to assessment of the aftermath of the Hangenberg Biological Crisis that took place at the top of the Famennian (Upper Devonian), the strophomenid, orthotetid and orthid brachiopods from the ‘Strunian’-aged Etroeungt Limestone Formation (Avesnois, northern France) are described. The Avesnois is the historical type area of the ‘Strunian’, traditionally considered as the last Famennian substage. Although they are sometimes abundant in the studied sections, their generic and specific diversity is very low in the Etroeungt Limestone Formation. Moreover, the majority of the species belong to long-ranging genera (Leptagonia, Schellwienella?, Schizophoria, Aulacella).
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No RBINS Staff publications
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Les restes d'animaux
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RBINS Staff Publications 2021
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Bedforms as Benthic Habitats: Living
on the Edge, Chaos, Order and Complexity
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Bedforms as benthic habitats are studied increasingly as acquisition and analysis of acoustic data improve in capturing, visualizing and quantifying terrain variables on various scales. However, feedback mechanisms between geomorphology and benthos are not always clear and complexity increases where humans also affect the benthos-landscape relationship. Based on research-oriented seabed mapping along the Belgian part of the North Sea (BPNS), a synthesis is provided on where increased biodiversity has been observed in relation to active bedforms.
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RBINS Staff Publications 2017
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Building a 4D Voxel-Based Decision Support System for a Sustainable Management of Marine Geological Resources
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For sustainable management of marine geological resources, a geological knowledge base is being built for the Belgian and southern Netherlands part of the North Sea. Voxel models of the subsurface are used for predictions on sand and gravel quantities and qualities, to ensure long-term resource use. The voxels are filled with geological data from boreholes and seismic lines, but other information can be added also. The geology provides boundary conditions needed to run environmental impact models that calculate resource depletion and regeneration under various scenarios of aggregate extraction. Such analyses are important in monitoring progress towards good environmental status, as outlined in the Marine Strategy Framework Directive. By including uncertainty, data products can be generated with confidence limits, which is critical for assessing the significance of changes in the habitat or in any other resource-relevant parameter. All of the information is integrated into a cross-domain, multi-criteria decision support system optimised for user-friendliness and online visualisation.
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RBINS Staff Publications 2017
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Cryptic diversity and ecosystem functioning: a complex tale of differential effects on decomposition
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Marine ecosystems are experiencing accelerating population and species loss. Some ecosystem functions are decreasing and there is growing interest in the link between biodiversity and ecosystem functioning. The role of cryptic (morphologically identical but genetically distinct) species in this biodiversity-ecosystem functioning link is unclear and has not yet been formally tested. We tested if there is a differential effect of four cryptic species of the bacterivorous nematode Litoditis marina on the decomposition process of macroalgae. Bacterivorous nematodes can stimulate or slow down bacterial activity and modify the bacterial assemblage composition. Moreover, we tested if interspecific interactions among the four cryptic species influence the decomposition process. A laboratory experiment with both mono- and multispecific nematode cultures was conducted, and loss of organic matter and the activity of two key extracellular enzymes for the degradation of phytodetritus were assessed. L. marina mainly influenced qualitative aspects of the decomposition process rather than its overall rate: an effect of the nematodes on the enzymatic activities became manifest, although no clear nematode effect on bulk organic matter weight loss was found. We also demonstrated that species-specific effects on the decomposition process existed. Combining the four cryptic species resulted in high competition, with one dominant species, but without complete exclusion of other species. These interspecific interactions translated into different effects on the decomposition process. The species-specific differences indicated that each cryptic species may play an important and distinct role in ecosystem functioning. Functional differences may result in coexistence among very similar species.
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RBINS Staff Publications 2016
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Active dispersal is differentially affected by inter- and intraspecific competition in closely related nematode species (vol 124, pg 561, 2016)
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RBINS Staff Publications 2016
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Bostryx hennahi (Gray, 1828) the largest Chilean bulimulid (Mollusca: Pulmonata) rediscovered among Tillandsia communities in northern Chile
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RBINS Staff Publications 2016
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The land Mollusca of Saint Kitts and Nevis (Lesser Antilles), with description of a new species
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RBINS Staff Publications 2016
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Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae
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RBINS Staff Publications 2016
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A new species of Bothriembryon (Mollusca, Gastropoda, Bothriembryontidae) from southeasternmost Western Australia
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RBINS Staff Publications 2016
