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1
Content available remote Microphytobenthic primary production along a non-tidal sandy beach gradient : an annual study from the Baltic Sea
100%
Urban-Malinga B. , Wiktor J.
Oceanologia
|
2003
|
tom No. 45 (4)
705-720
EN
The microphytobenthic primary production and chlorophyll a content were studied over the annual cycle (May 1998 - May 1999) on a non-tidal Baltic sandy beach at three stations along the beach gradient: littoral, waterline and splash zone. The chlorophyll a concentrations varied between 0.88 and 12.18 žg cm-3. Net and gross primary production rates respectively lay within the ranges 0.1-31.4 mgC m-2 h-1 and 0.2-41.8 mgC m-2 h-1. The highest values of both Chl a content and primary production were noted at the littoral station, the lowest ones at the waterline. The mean annual P/B ratio was highest at the waterline. The differences in Chl a content between stations were statistically significant and may be related to water dynamics, resuspension and water content. Production rates were highly variable on monthly time scales, and the highest results at all the study locations were noted in July. The gross photosynthetic rates were significantly correlated with water temperature.
2
Content available Microphytobenthic primary production along a non-tidal sandy beach gradient: an annual study from the Baltic Sea
100%
Urban-Malinga B. , Wiktor J.
Oceanologia
|
2003
|
tom 45
|
nr 4
EN
The microphytobenthic primary production and chlorophyll a content were studied over the annual cycle (May 1998 – May 1999) on a non-tidal Baltic sandy beach at three stations along the beach gradient: littoral, waterline and splash zone. The chlorophyll a concentrations varied between 0.88 and 12.18 μg cm−3. Net and gross primary production rates respectively lay within the ranges 0.1–31.4 mgC m−2 h−1 and 0.2–41.8 mgC m−2 h−1. The highest values of both Chl a content and primary production were noted at the littoral station, the lowest ones at the waterline. The mean annual P/B ratio was highest at the waterline. The differences in Chl a content between stations were statistically significant and may be related to water dynamics, resuspension and water content. Production rates were highly variable on monthly time scales, and the highest results at all the study locations were noted in July. The gross photosynthetic rates were significantly correlated with water temperature.
3
Molecular phylogeny of the sand-dwelling dinoflagellate Planodinium striatum and Chrysodinium gen. nov. for Plagiodinium ballux (Dinophyceae)
86%
Gomez F. , Nakamura Y. , Artigas L. F.
Acta Protozoologica
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2019
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tom 58
|
nr 3
4
Content available Molecular Phylogeny of the Sand-dwelling Dinoflagellate Planodinium striatum and Chrysodinium gen. nov. for Plagiodinium ballux (Dinophyceae)
86%
Gómez F. , Nakamura Y. , Artigas L. F.
Acta Protozoologica
|
2019
|
tom 58
|
nr 3
115-124
EN
The molecular phylogeny of the sand-dwelling dinoflagellate Planodinium striatum was investigated from isolates collected in the NE English Channel. In the SSU rRNA gene phylogeny, the sequences of Planodinium clustered with the type species of Plagiodinium, P. belizeanum, and more distantly related to Plagiodinium ballux. Although the SSU rRNA gene sequences of Planodinium showed a high percentage of identity (96%) with partial sequences of species of Podolampas (~1200 base pairs), the SSU rRNA gene phylogenies did not show a relationship with the clade of the Podolampadaceae (Podolampas, Blepharocysta, Roscoffia), neither with the sequences of the sanddwelling genus Cabra. The SSU rRNA gene sequences of Plagiodinium belizeanum and P. ballux showed a low percentage of identity (96%) clustering in separate clades in the SSU rRNA gene phylogeny with Planodinium. The morphology of P. ballux and its generic type differed in the plate arrangement and the morphology of the cingulum, amongst other features. Based on the morphological and molecular differences, we propose the new genus Chrysodinium gen. nov. for P. ballux, with the re-interpreted thecal plate formula Po 3’ 1’’ 7c 2s 5’’’ 1’’’’.
5
Content available remote Microphytobenthos as an indicator of water quality and organic pollution in the western coastal zone of the Sea of Azov
86%
Barinova S. , Bondarenko A. , Ryabushko L. , Kapranov S.
Oceanological and Hydrobiological Studies
|
2019
|
tom Vol. 48, No. 2
125--139
EN
Bioindication of organic pollution and seawater quality was carried out for the first time in the western part of the Sea of Azov on the basis of species composition and quantitative characteristics of microphytobenthos. A total of 229 algal samples were collected at 17 sites over the period of 2005-2014 on three different substrates in three areas under study: Sivash Gulf, the Kerch Strait and Cape Kazantip. In total, 200 taxa of algae were found, which belong to six taxonomic divisions with a predominance of diatoms. Among those, 108 taxa are indicators of substrate, water temperature, salinity, water pH, trophic state, the type of nutrition and organic pollution of water. It has been shown that the most active self-purification of water takes place in communities on stony substrates. The largest number of algae species (50%) occurs in the cleanest waters of the Kazantip Nature Reserve (Water Quality Classes I–II). The species composition of organic pollution indicators in Sivash Gulf corresponds to waters of Classes III–IV, which are more polluted than those of the Kerch Strait and Cape Kazantip. All the studied areas of the Sea of Azov are cleaner compared to some waters of the Eastern Mediterranean and the Sea of Japan.
6
Content available Microphytobenthic primary production on exposed coastal sandy sediments of the Southern Baltic Sea using ex situ sediment cores and oxygen optodes
72%
Kuriyama K. , Grundling-Pfaff S. , Diehl N. , Woelfel J. , Karsten U.
Oceanologia
|
2021
|
tom 63
|
nr 2
7
Content available Live autochthonous benthic diatoms on the lower depths of Arctic continental shelf. Preliminary results
72%
Druzhkova E. , Oleinik A. , Makarevich P.
Oceanologia
|
2018
|
tom 60
|
nr 1
EN
An autochthonous community of benthic diatoms was discovered in June 2015 in the upper sediment layer at depths of 170, 205, and 245 m in the central Barents Sea. At least three benthic microalgae species (Gyrosigma fasciola, Pleurosigma angulatum, and Pleurosigma sp. 1) were detected in the sediment but not the upper water column. Analyses revealed that these benthic microalgae represent a depleted fragment of Arctic littoral microphytobenthos. Compared with the littoral flora, the deep-water assemblage is less diverse and displays low abundance. The data reported here challenge the generally accepted belief that the presence of certain microalgae at significant depths results from vertical or horizontal transfer.
8
Content available Spatial distribution of biological and physical sediment parameters in the Western Gulf of Gdansk
72%
Huzarska K.
Oceanologia
|
2013
|
tom 55
|
nr 2
9
Microphytobenthos of the shallow littoral of the southern Baltic
44%
Plinski M. , Kwiatkowski J.
Oceanological Studies
|
1996
|
tom 25
|
nr 4
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