Search publications of the members of the Royal Belgian institute of natural Sciences
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Validation of the DNA barcoding approach to survey ant communities in the Ecuadorian Andes
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Spinnennieuws uit de wereld.
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Age and origin of Australian Bennelongia (Ostracoda, Crustacea)
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Verspreidingspatronen en bedreigingen van de arthropodenfauna van het Schelde-estuarium.
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From Naples 1963 to Rome 2013 - A brief review of how the International Research Group on Ostracoda (IRGO) developed as a social communication system
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DNA barcoding of fire and thief ants (genus Solenopsis) of the Ecuadorian Andes as a tool for biodiversity research
- DNA BARCODING OF FIRE ANTS AND THIEF ANTS (GENUS SOLENOPSIS) OF THE ECUADORIAN ANDES AS A TOOL FOR BIODIVERSITY RESEARCH SONET, G. (1), Nagy, Z. T. (1), Jacquemin, J. (2), Wauters, N. (2), Delsinne, T. (2), Leponce, M. (2) (1) Joint Experimental Molecular Unit, Royal Belgian Institute of Natural Sciences, Brussels & Royal Museum for Central Africa, Tervuren, Belgium (2) Royal Belgian Institute of Natural Sciences & Université Libre de Bruxelles, Belgium Lightning Talk, Barcoding Insects 2, Napier 208, Friday, 15:00 to 15:07 Poster Location: B25 Members of the genus Solenopsis are among the most abundant ants in tropical rainforests. They are represented by more than 200 described species worldwide and some are dreadful invasive species. The identification to the species level is hampered by a dearth of diagnostic morphological characters and represents a serious limitative step in biodiversity inventories and in the study of invasive species. We set up and validated a DNA barcoding procedure to identify ants of the genus Solenopsis collected in the Podocarpus National Park of the Ecuadorian Andes. Complete specimens were used for DNA extraction and subsequently preserved as vouchers to allow further morphological analysis. More than 14 new molecular operational taxonomic units were identified by the standard DNA barcode fragment. In some cases specimens from a single morpho-species occurring at different altitudes could be distinguished. This study resulted in an appropriate laboratory protocol and a reference library useful to identify ants of the genus Solenopsis in the Ecuadorian Andes.
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Belgian Network for DNA Barcoding
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Redescriptions of six species of Ilyodromus Sars, 1894 (Crustacea, Ostracoda, Cyprididae) from New Zealand and Eastern Australia
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Species identification of forensically important flies using DNA barcoding
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DNA barcoding in European and African Accipiter (Accipitridae: Falconiformes)
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Linking present environment and reproductive modes segregation (Geographic parthenogenesis) in Eucypris virens (Crustacea: Ostracoda)
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Een faunistische en ecologische bijdrage tot van de spinnenfauna van zuid en oost Belgie. Deel 1.
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DNA barcoding of reptiles: practical aspects
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Obituary - In memorium of Dr. Chris King (December 1943 - January 2015)
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DNA barcoding and male genital morphology reveal six cryptic species in the West Palearctic bee complex Seladonia smaragdula (Vachal, 1895) (Hymenoptera: Apoidea: Halictidae)
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Benthic foraminiferal and isotopic patterns during the Early Eocene Climatic Optimum (Aktulagay section, Kazakhstan).
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Eocene hyperthermals in the North Sea Basin: a Belgian Ypresian perspective.
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Kaart van het gebruik van de Belgische zeegebieden - Carte de l'usage des espaces marins belges
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Seasonal variation in concentration, size and settling velocity of muddy marine flocs in the benthic boundary layer
- Suspended Particulate Matter (SPM) concentration profiles of the lowest 2 m of the water column and particle size distribution at 2 m above the bed were measured in a coastal turbidity maximum area (southern North Sea) during more than 700 days between 2006 and 2013. The long-term data series of SPM concentration, floc size, and settling velocity have been ensemble averaged according to tidal range, alongshore residual flow direction, and season, in order to investigate the seasonal SPM dynamics and its relation with physical and biological processes. The data show that the SPM is more concentrated in the near-bed layer in summer, whereas in winter, the SPM is better mixed throughout the water column. The decrease of the SPM concentration in the water column during summer is compensated by a higher near- bed concentration indicating that a significant part of the SPM remains in the area during summer rather than being advected out of it. The opposite seasonality between near-bed layer and water column has to our knowledge not yet been presented in literature. Physical effects such as wave heights, wind climate, or storms have a weak correlation with the observed seasonality. The argument to favor microbial activity as main driver of the seasonality lies in the observed variations in floc size and settling velocity. On average, the flocs are larger and thus settling velocities higher in summer than winter.
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Seasonality of floc strength in the southern North Sea
- The suspended particulate matter (SPM) concentration in the high turbidity zones of the south- ern North Sea is inversely correlated with chlorophyll (Chl) concentration. During winter, SPM concentration is high and Chl concentration is low and vice versa during summer. This seasonality has often been associated with the seasonal pattern in wind forcing. However, the decrease in SPM concentration corresponds well with the spring algal bloom. Does the decrease of SPM concentration caused by changing wind conditions cause the start of algae bloom, or does the algae bloom decrease SPM concentrations through enhanced floccula- tion and deposition? To answer the question, measurements from 2011 of particle size distribution (PSD), SPM, and Chl concentrations from the southern North Sea have been analyzed. The results indicate that the frequency of occurrence of macroflocs has a seasonal signal, while seasonality has little impact upon floc size. The data from a highly turbid coastal zone suggest that the maximum size of the macroflocs is controlled by turbulence and the available flocculation time during a tidal cycle, but the strength of the macroflocs is con- trolled by the availability of sticky organic substances associated with enhanced primary production during spring and summer. The results highlight the shift from mainly microflocs and flocculi in winter toward more muddy marine snow with larger amounts of macroflocs in spring and summer. The macroflocs will reduce the SPM concentrations in the turbidity maximum area as they settle faster. Consequently, the SPM concen- tration decreases and the light condition increases in the surface layer enhancing algae growth further.
