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Leeches (Clitellata: Hirudinida) of an upland stream : taxonomic composition in relation to habitat conditions

Cichocka J., Jabłońska-Barna I., Bielecki A., Buczyńska E., Buczyński P., Stryjecki R., Pikuła D.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 2

245--253

EN

Hirudinida comprise a constant component of benthofauna in running waters and their taxonomic composition is often analyzed to evaluate the environmental quality. However, the indicatory role of particular species is still arguable. Thus, it is very important to provide more detailed information on the impact of environmental parameters on the species structure within this group of invertebrates. Representatives of nine species were found in the investigated upland stream including mainly Erpobdella vilnensis and E. octoculata. The research has demonstrated that the hydromorphological conditions and feeding behavior are the main factors determining the taxonomic composition of leeches in particular sections of a watercourse.

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First record of a new alien species Limnodrilus cervix Brinkhurst, 1963 (Annelida, Clitellata) in the Vistula Lagoon (Southern Baltic Sea) [commun.]

Dumnicka E., Jabłońska-Barna I., Rychter A.

Oceanologia

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2014

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No. 56 (1)

151--158

EN

The present work reports the first record of Limnodrilus cervix in the south-eastern part of the Baltic Sea. A specimen of this North American species was found in 2010 in the Vistula Lagoon, near the village of Piaski (Poland). The distribution of other Nearctic Limnodrilus species in Europe is also presented.

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Environmental agents in Lake Łuknajno (Poland) affecting the genome of Chironomus melanotus Keyl, 1961 (Diptera, Chironomidae) - a new species of Polish fauna

Jabłońska-Barna I., Szarek-Gwiazda E., Michailova P.

Oceanological and Hydrobiological Studies

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2013

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Vol. 42, No. 2

164-172

EN

Chironomus melanotus Keyl, a new species of Polish fauna, is described on the basis of cytogenetic characteristics. It belongs to the cytocomplex thummi with the chromosome set 2n = 8, chromosome arm combinations AB CD EF G and species-specific karyotype markers. Two types (somatic and inherited) of structural chromosome rearrangements in salivary gland chromosomes were identified in the species and somatic rearrangements (heterozygous inversions, deficiencies, deletions — Somatic index — 0.54) were observed for the first time in this species. In addition to those in the mosaic state, some genome alterations — trisomy and “B” chromosome, as well as larval malformations (10.27%) were detected for a first time. The malformations and somatic structural and genome aberrations may have been caused by different stress agents in the environment. Thus, we suggest that the high spectrum of somatic rearrangements observed in C. melanotus may indicate the existence of pollution (elevated Cd and Pb concentrations) in Lake Łuknajno (the study area) and perhaps trace metals and different chemicals produced by the Chara species.

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Biocontamination of the western Vistula Lagoon (south-eastern Baltic Sea, Poland)

Jabłońska-Barna I., Rychter A., Kruk M.

Oceanologia

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2013

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No. 55 (3)

751--763

EN

Non-native species exert considerable pressure on aquatic ecosystems; accordingly, they are treated as biopollutants. The Vistula Lagoon, one of the largest brackish water bodies in the Baltic, has become a part of the central corridor for hydrobionts migrating in the direction of western Europe and species expanding in inshore waters. Ten non-indigenous species of benthic invertebrates from five different biogeographical regions have been found in the western part of the Lagoon. Their considerable abundance relative to the numbers and abundance of native species testifies to the high level of biopollution there. The integrated biological contamination index (IBC) calculated for the macrobenthos in the western Vistula Lagoon was 4 and corresponds to the Lagoon's poor ecological status.

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Cytogenetic characteristic of species of the Chironomus genus (Diptera, Chironomidae) from Lake Łuknajno Biosphere Reserve (northwest Poland)

Jabłońska-Barna I., Michailova P.

Oceanological and Hydrobiological Studies

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2009

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Vol. 38, No.2

77-81

EN

The cytotaxonomic characteristics of two species of the Chironomus genus from Lake Łuknajno (northwest Poland) were determined: Chironomus nuditarsis Strenzke, 1959 with the chromosome arm combinations of AB, CD, EF, and G (the "thummi" cytocomplex), and Camptochironomus tentans (Fabricius, 1805) with the chromosome arm combinations of AB, CF, DE, and G. A heterozygous inversion in arm F of the Chironomus nuditarsis chromosomes was detected. The polymorphism of Camptochironomus tentans as a homozygous inversion in arms A and E and a heterozygous inversion in arm F were revealed.