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Within-year spatio-temporal variation in meiofaunal abundance and community structure, Sinop Bay, the Southern Black Sea

Ürkmez D., Sezgin M., Karaçuha M. E., Öksüz İ., Katağan T., Bat L., Dağlı E., Şahin F.

Oceanological and Hydrobiological Studies

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2016

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Vol. 45, No. 1

55--65

EN

The first comprehensive meiobenthos study was carried out in Turkey, the Southern Black Sea (Sinop) from August 2009 to July 2010. Sediment samples were collected monthly at eight stations at 3 m and 10 m water depths located on four transects. A metal push core sampler (surface area 12.56 cm2 and length 10 cm) was used to obtain the material. Meiofaunal abundance and composition were examined. The results revealed that the meiofaunal community consists of twenty five higher taxonomic groups. Four groups dominated the community: Nematoda, Harpacticoida, Foraminifera and Polychaeta. Spatial and temporal meiofaunal abundance fluctuated among stations and over time.

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Meiobenthiń polychaetes in the northwestern Black Sea

Vorobyova L., Bondarenko O., Izaak O.

Oceanological and Hydrobiological Studies

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2008

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Vol. 37, No.1

43-55

EN

Polychaetes of the northwestern Black Sea (NWBS) were sampled in January 2005 at 4 sites comprising 32 stations. The 4 sites have different anthropogenic loads, different depths (<10 m, 11-20 m, 21-30 m, >30 m) and different substrates (shelly, silty). The species composition of polychaetes in Black Sea meiobenthic communities has not previously been studied. Twenty polychaete species belonging to 11 families, the Phyllodocidae, Nephtyidae, Polynoidae, Sigalionidae, Nereidae, Syllidae, Hesionidae, Protodrilidae, Spionidae, Capitellidae and Ampharetidae, were recorded. The polychaete density varied with depth and type of substrate from 500 ind. m-2 to 66,000 ind. m-2.

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A home away from home: a meiobenthic assemblage in a ship's ballast water tank sediment

Radziejewska T., Gruszka P., Rokicka-Praxmajer J.

Oceanologia

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2006

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No. 48 (S)

259-265

EN

The world-wide research on ship-aided dispersal of marine organisms and invasions of non-indigenous species focuses primarily on the plankters, which show the greatest potential for invading new areas and establishing viable populations in them, either in the water column (holoplankton) or on the bottom (meroplanktonic larvae of benthic species settling on the sea floor). As meiobenthic animals usually lack a pelagic larval stage in their life cycle, no biological invasion study has, to our knowledge, ever specifically targeted marine transport as a means of meiofaunal dispersal. Here we present a set of data showing that the sediment deposited in a ship's ballast water tank does support a viable meiobenthic assemblage. We examined 0.015-dm3 aliquots of a 1 dm3 sample from a c. 1.5-cm thick layer of sediment residue in the ballast tank of MS Donnington, brought to the "Gryfia" Repair Shipyard in Szczecin (Poland). The samples were found to contain representatives of calcareous Foraminifera, hydrozoans, nematodes, turbellarians, harpacticoid copepods and their nauplii, and cladocerans, as well as meiobenthic-sized bivalves and gastropods. Nematodes proved to be the most constant and most numerous component of the assemblage. The sediment portions examined revealed the presence of 1-11 individuals representing 11 marine nematode genera. The viability of the meiobenthic assemblage was evidenced by the presence of ovigerous females of both nematodes and harpacticoids. Survival of the meiobenthos in shipborne ballast tank sediment residues may provide at least a partial explanation for the cosmopolitan distribution of meiobenthic taxa and may underlie the successful colonisation of new habitats by invasive meiofaunal species.

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The Słupsk Furrow as a marine protected area in the Baltic

Drzycimski I.

Oceanological Studies

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2000

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Vol. 29, No. 2

33-42

EN

Long-term series of hydrographic and biological data show the Slupsk Furrow to be the only Baltic deep area devoid of H2S, its bottom being inhabited by a number of marine species not found in other Baltic deeps (Bornholm, Gdansk, and Gotland Deeps). For this reason, it is necessary to grant the Slupsk Furrow the status of a marine protected area as a habitat and refuge of species absent in other Baltic Proper deeps.

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Meiobenthic communities of the Pomeranian Bay (southern Baltic): effects of proximity to river discharge

Rokicka-Praxmajer J., Radziejewska T., Dworczak H.

Oceanologia

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1998

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No. 40 (3)

243-260

EN

The Pomeranian Bay (southern Baltic Sea) is a component of the river Oder (Odra) estuarine system. It receives the Oder's discharge once it has passed through the Szczecin Lagoon, a eutrophic and polluted water body. The discharge has been documented as affecting the hydrography of the pelagic domain as well as the sedimentary environments and the macrozoobenthos of the Bay. This study focused on the distribution of meiobenthic communities in the Bay as investigated with the use of a suite of uni- and multivariate analyses applied to data collected at 14 stations in September 1993. Meiobenthic community characteristics (composition and abundance) are presented in relation to sediment properties (grain size, silt/clay and organic matter content), changing with distance from the major riverine discharge site. The communities studied showed a clear distinction between those associated with organic matter-enriched sediments close to the discharge site and the assemblages living in clean sands, away from the discharge. We conclude that the meiobenthos can be regarded as another compartment of the Pomeranian Bay system responding to the River Oder discharge.