Search publications of the members of the Royal Belgian institute of natural Sciences
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Chironomid paleoecology in Africa
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BiodivERsA 2011-2012 Project Call Brochure: Biodiversity Dynamics (Developing scenarios, identifying tipping points and improving resilience
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Fish in the desert? The Younger Dryas and its influence on the paleoenvironment at Baaz Rockshelter, Syria
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Evidences for several species within the cosmopolitan eurybathic deep-sea lysianassoid amphipod Eurythenes gryllus s.l.
- Eurythenes gryllus (Lichtenstein, 1822) is a presumed cosmopolitan eurybathic benthopelagic giant deep-sea amphipod. However, previous studies already highlighted genetically divergent lineages in the Atlantic and Pacific Oceans, which appeared to be vertically stratified, and minor morphological differences between populations were also recorded. With an aim to quantify the geographic and bathymetric patterns of genetic variations, the genetic diversity in Eurythenes gryllus was investigated at the global scale (Arctic, Atlantic, Pacific and Southern Oceans) using three different genes (COI, 16S rRNA, 285 rRNA). This genetic analysis was accompanied by a thorough morphological study. Phylogenetic and phylogeographic analyses revealed the existence of at least eight well-supported clades, two bathyal and six abyssal, which were separated by genetic distances at the level of usual interspecific divergences. A subsequent morphological analysis confirmed the genetic findings and revealed small but consistent differences between the different clades, which will be described as separate species. Furthermore, a clear genetic break was observed between specimens sampled above and below 3000 m. This bathymetric break below 3000 m has already been reported for several organisms and regions, suggesting its role as a ubiquitous phylogeographic barrier for barophysical tolerance. The Eurythenes clade, comprising specimens sampled at bathyal sites in the Arctic and Southern Oceans, is presumably the true E. gryllus. This represents, to our knowledge, the first molecular evidence for a bipolar distribution in a macro-benthic deep-sea organism. The present results clearly highlight the difficult nature of research on the systematics of deep-sea crustaceans and shows that the abyss is a more complex environment than previously assumed, likely to harbour an important hidden diversity.
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« Biosyst.EU 2013 – Global Systematics! Compte rendu des journées : 18-22 février 2013, Vienne, Autriche
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Linking present environment and reproductive modes segregation (Geographic parthenogenesis) in Eucypris virens (Crustacea: Ostracoda).
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Hurdles in investigating UVB damage in the putative ancient asexual Darwinula stevensoni (Ostracoda, Crustacea).
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Molecular species definitions and phylogeographic patterns in non-marine ostracods.
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A revision of Western Australian Bennelongia (Crustacea, Ostracoda, Cyprididae) – the complementarity of molecular and morphological studies.
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Integrative analyses of valve outlines and molecular DNA sequences in Eucypris virens (Crustacea, Ostracoda)
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Deciphering radiation patterns in Bennelongia De Deckker & Mckenzie, 1981 (Crustacea, Ostracoda) in Australia.
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Cryptic diversity in asexuals – the example of non-marine ostracods
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First occurrence of a Hymenosomatid crab Elamena mathoei (desmarest, 1823) (Crustacea: Decapoda: Brachyura) in the Mediterranean Sea
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High cryptic diversity and persistent lineage segregation in endemic Romecytheridea (Crustacea, Ostracoda) from the ancient Lake Tangayika (East Africa)
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The ecological role of ponds in a changing world. Hydrobiologia
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Effect of land use on pollution status and risk if fish endocrine disruption in small farmland ponds.
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The distribution of sexual reproduction of the geographic parthenogen Eucypris virens (Crustacea: Ostacoda) matches environmental gradients in a temporary lake.
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On Callistocypris thailandensis sp. nov. (Ostracoda, Crustacea) from Thailand.
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Mate recognition as a reproductive barrier in sexual and parthenogenetic Eucypris virens Crustacea, Ostracoda)
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Contribution to the knowledge of the genus Vestalenula Rossetti & Martens, 1998 (Crustacea, Ostracoda, Darwinulidae), with the description of a new species, V. carinata sp.n., from a semi-terrestrial habitat in the island of Florianópolis, Brazil.
