scholarly journals Sedimentary microplastic concentrations from the Romanian Danube River to the Black Sea

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Iulian Pojar ◽  
Adrian Stănică ◽  
Friederike Stock ◽  
Christian Kochleus ◽  
Michael Schultz ◽  
...  
Keyword(s):  
Black Sea ◽  
Danube River ◽  
The Black Sea ◽  
Danube Delta ◽  
Black Sea Coast ◽  
River Danube ◽  
Terrestrial Environments ◽  
Ultimate Fate ◽  
First Time ◽  
Sea Coast

AbstractA multitude of recent studies have detailed microplastic concentrations in aquatic and terrestrial environments, although questions remain over their ultimate fate. At present, few studies have detailed microplastic characteristics and abundance along a freshwater–marine interface, and considerable uncertainties remain over the modelled contribution of terrestrial and riverine microplastic to the world’s oceans. In this article, for the first time, we detail sedimentary microplastic concentrations along a River–Sea transect from the lower reaches of a major continental river, the River Danube, through the Danube Delta, the Black Sea coast to the Romanian and Bulgarian inner shelf of the Black Sea. Our results indicate that isolated areas of the Danube Delta are still relatively pristine, with few microplastic particles in some of the sediments sampled.

scholarly journals Update on the Geographic Distribution of Lutra lutra at the Romanian Black Sea Coast

2017 ◽  
Vol 60 (1) ◽  
pp. 413-417 ◽  
Author(s):  
Daniyar Memedemin ◽  
Marian Tudor ◽  
Dan Cogălniceanu ◽  
Marius Skolka ◽  
Gabriel Bănică ◽  
...  
Keyword(s):  
Black Sea ◽  
Threatened Species ◽  
The Black Sea ◽  
Lutra Lutra ◽  
Black Sea Coast ◽  
European Otter ◽  
First Time ◽  
The City ◽  
Near Threatened ◽  
Sea Coast

Abstract We report the occurrence of the European otter (Lutra lutra Linnaeus, 1758) along the entire Romanian Black Sea coast, for the first time. Several sightings were within the harbor and the city of Constanţa, indicating that the otter can accommodate to and tolerate high human impact. The report is based on observations made between 2012 and 2015. The species has been previously reported from all Romanian regions but not from the Black Sea coast. The occurrences reported within this article confirm an extension of the range of this Near Threatened species on the Romanian Black Sea coast, most probably due to the increasing of population size from other sources such as the Danube floodplain.

scholarly journals First data of ITS1-genotyping of the Black Sea trematodes Cainocreadium and Helicometra (Trematoda: Opecoelidae)

2018 ◽  
Vol 3 (4) ◽  
pp. 36-42
Author(s):  
A. V. Katokhin ◽  
Yu. M. Kornyychuk
Keyword(s):  
Black Sea ◽  
Nucleotide Sequences ◽  
The Black Sea ◽  
Rrna Gene ◽  
Supplementary Data ◽  
Black Sea Coast ◽  
Morphological Differences ◽  
First Time ◽  
Sea Fish ◽  
Sea Coast

Data of genetic analysis of the Black Sea trematodes of Cainocreadium genus and Helicometra fasciata were obtained for the first time. The nucleotide sequences of ITS1 rRNA gene cluster of Cainocreadium flesi from Platichthys flesus (GenBank entries MG980645, MG980646) and Cainocreadium sp. from Gaidropsarus mediterraneus (MG980643, MG980644, MK248037, MK248038) off Crimean Black Sea coast were found to be identical. Nevertheless, they have not been synonymized because of morphological differences known between these hostal morphs. Sequences of Cainocreadium from the Black Sea fish turned out to differ, by 4 positions, from similar sequences of a closely related Mediterranean congener, C. labracis (cercaria). Five insertions-deletions and 38 nucleotide sequences distinguish the ITS1 sequences of the Black Sea trematodes, C. flesi and Cainocreadium sp., from ITS1 sequences of another Mediterranean congener, C. dentecis. The ITS1 sequences of the Black Sea and Mediterranean Helicometra fasciata samples also differ: 5 nucleotide changes and 11 insertions-deletions were identified. Supplementary data associated with this article can be found in online version at https://doi.org/10.21072/mbj.2018.03.4.04.

scholarly journals Biodiversity, Distribution and Ecology of Testate Amoebae (Arcellinida and Euglyphida) from the Bulgarian Black Sea Coast and the related brackish lakes. A Synthesis

2019 ◽  
Vol 6 (2) ◽  
pp. 14-39
Author(s):  
Vassil Golemansky ◽  
Rositsa Davidova
Keyword(s):  
Black Sea ◽  
Testate Amoebae ◽  
The Black Sea ◽  
Underground Waters ◽  
Brackish Lakes ◽  
Marine Sand ◽  
Black Sea Coast ◽  
Distribution And Ecology ◽  
First Time ◽  
Sea Coast

Abstract The studies on the marine and freshwater testate amoebae of the Bulgarian Black Sea littoral and some related coastal brackish lakes are briefly reviewed. So far, a total of 184 species and subspecies of testate amoebae from 18 families and 45 genera from orders of Arcellinida and Euglyphida were published in national and international journals. The underground waters of the Bulgarian marine sand supralittoral are better studied than the related continental lakes. A total of about 45 species of marine interstitial testate amoebae are known, so far, and a big part of them were for the first time described from the Black Sea littoral. It’s interesting to note the presence in the marine underground waters of the Black Sea littoral of many freshwater testate amoebae also, considered by us as eurybionts. That is due of the low and variable salinity of the littoral Black Sea waters during the year. The presence of some psammobiotic testate amoebae as Psammonobiotus lineare and Corythionella georgiana in some related brackish lakes is also of ecological interest. The general conclusion of the present synthesis is that the testate amoebae fauna of the Bulgarian Black Sea coast and the related with it many brackish and freshwater littoral lakes is few known yet and need more active researches.

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