Papers by Kęstutis Arbačiauskas
bioRxiv (Cold Spring Harbor Laboratory), Jan 20, 2023
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Conservation Genetics Resources, Oct 20, 2013
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BioInvasions Records, 2018
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Journal of Limnology, Sep 1, 2004
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Freshwater Biology, Feb 18, 2013
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Hydrobiologia, Apr 25, 2023
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Hydrobiologia, Sep 1, 2004
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Acta Ichthyologica Et Piscatoria, Jun 30, 2013
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Functional Ecology, Aug 1, 2003
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Aquatic Ecosystem Health & Management, Dec 13, 2017
Ponto-Caspian peracaridan Crustaceans first invaded the Baltic Sea basin from the basin of the Bl... more Ponto-Caspian peracaridan Crustaceans first invaded the Baltic Sea basin from the basin of the Black Sea via artificial canals in the 18th Century. In the 1960s, the number of these species substantially increased due to deliberate introduction of Mysids and Amphipods into Lithuanian waters to enhance fish production. Range expansion of Ponto-Caspian peracaridan Crustaceans is continuing due to secondary dispersal and invasion by new species. Historically the main invasion vectors were inland shipping, deliberate introductions and natural dispersal across inland waterways; more recently the significance of marine invasions related to shipping seems to be increasing. These invaders have had detrimental impacts on local macroinvertebrates and may even have caused local extinctions of native species. Such impacts likely result from predatory and competitive interactions between alien and native species. The magnitude of predatory impacts of omnivorous Ponto-Caspian peracaridan Crustaceans can rise with increasing productivity of the environment. These Crustaceans, especially large-sized species, have proved to be prone to carnivorous feeding and high plasticity when acquiring nutrients for reproduction and growth. It seems that stoichiometric plasticity related to their flexible feeding strategy may favour their invasiveness. Another undesirable outcome of these invasions is distortion of conventional metrics of ecological status for aquatic systems. Meanwhile, at least in lakes, the primary goal of introduction, i.e. enhancement of fish production, has not been achieved. Some invasive Crustaceans seem to be adapting to previously unsuitable habitats in their invaded range, which may exacerbate their negative impacts. Further expansion of accumulated and new Ponto-Caspian peracaridan Crustaceans can be expected in Lithuanian waters as well as in the Baltic Sea basin, and their impacts may increase in the future.
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Limnologica, Nov 1, 2022
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Acta Zoologica Lituanica, 2010
... Vytautas RAKAUSKAS, Simona SMILGEVIČIENĖ, Kęstutis ARBAČIAUSKAS ... 1992; Dick 1996;Dick &... more ... Vytautas RAKAUSKAS, Simona SMILGEVIČIENĖ, Kęstutis ARBAČIAUSKAS ... 1992; Dick 1996;Dick & Platvoet 1996; Arbačiauskas & Gumuliauskaitė 2007), have a strong impact on composi-tion of benthic and planktonic communities, may cause sizeable changes in species ...
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Zoological Journal of the Linnean Society
Amphipods have diversified greatly in the Ponto-Caspian region. Although many of these species ar... more Amphipods have diversified greatly in the Ponto-Caspian region. Although many of these species are prominent invaders their systematics remains unclear. Taking an integrative approach, we investigate the taxonomy of Trichogammarus trichiatus, a widespread invader in European inland waters. It was initially described from the north-eastern Black Sea coast as Chaetogammarus trichiatus by Martynov in 1932. A similar taxon, Chaetogammarus tenellus major, was described by Cărăușu from the western Black Sea in 1943 but later synonymized with C. trichiatus. Chaetogammarus trichiatus was itself shuffled between Chaetogammarus and the Atlanto-Mediterranean Echinogammarus, currently being assigned to Trichogammarus. Our analyses (six DNA markers, 60 measurements and scanning electron microscopic imaging) reveal that T. trichiatus and C. tenellus major are distinct species; the former is a Caucasian endemic, whereas the latter invaded Europe. Unexpectedly, T. trichiatus is an incipient species...
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The Ponto-Caspian region is an endemicity hotspot that harbors several crustacean radiations, amo... more The Ponto-Caspian region is an endemicity hotspot that harbors several crustacean radiations, among which amphipods are the most diverse. These poorly known species are severely threatened in their native range, while at the same time they are invading European inland waters with significant ecological consequences. A proper taxonomic knowledge of this fauna is paramount for its conservation within and monitoring outside the native region. Here, we assemble a DNA barcode reference library for nearly 60% of all known Ponto-Caspian amphipod species. We use several methods to define molecular operational taxonomic units (MOTUs) based on two mitochondrial markers (COI and 16S) and assess their congruence with current species-level taxonomy based on morphology. Depending on the method, we find that 54–69% of species had congruent morpho-molecular boundaries. The cases of incongruence resulted from lumping distinct morphospecies into a single MOTU (7–27%), splitting a morphospecies into s...
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Biological Invasions, 2017
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Acta Zoologica Lituanica, 2008
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Acta Zoologica Lituanica, 2008
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Acta Zoologica Lituanica, 2008
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Papers by Kęstutis Arbačiauskas