Pleurosira laevis (Ehrenb.) Compere in Bacillaria 5: 177, figs 1-17, 20, 39. 1982.

Bilous, Olena P., Genkal, Sergey I., Zimmermann, Jonas, Kusber, Wolf-Henning & Jahn, Regine, 2021, Centric diatom diversity in the lower part of the Southern Bug river (Ukraine): the transitional zone at Mykolaiv city, PhytoKeys 178, pp. 31-69 : 31

publication ID	https://dx.doi.org/10.3897/phytokeys.178.64426
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treatment provided by	PhytoKeys by Pensoft (2021-05-20 20:16:17, last updated 2024-11-26 05:22:16)
scientific name	Pleurosira laevis (Ehrenb.) Compere in Bacillaria 5: 177, figs 1-17, 20, 39. 1982.
status

Treatment

Basionym.

Biddulphia laevis Ehrenb. in Ber. Bekanntm. Verh. Königl. Preuss. Akad. Wiss. Berlin: 122. 1843.

Synonyms.

Cerataulus laevis Ralfs in A. Pritch., C. polymorpha Van Heurck, Odontella polymorpha Kütz.

Morphological description.

The frustule is cylindrical, valves are elliptical-rounded-oval, with diameter 39-61 μm, 15-17 areolae in 10 μm (Fig. 4A-D View Figure 4 ).

Ecology.

This taxon occurs in brackish and fresh water habitats, commonly found in estuaries of large rivers, also surviving in inland waters with high conductivity, this is a halophilic species. It has considerable abundance in epiphytic, benthic hard waters with relatively high electrical conductivity. Distributed and more abundant in warm-temperate and tropical waters, being mesohalobic, from alkalibiontic to alkaliphilic indicator, β-mesosaprobic, and eutraphentic ( El-Awamri 2008).

Distribution.

Valves were found in benthic samples in the Mykolaiv city of the Southern Bug River and downriver (Table 1 View Table 1 ). For Ukrainian territory it was recorded for estuaries of the Black Sea, also reported for the Southern Bug River ( Tsarenko et al. 2009).

Pleurosira laevis is quite cosmopolitan, distributed in the Boreal, near coasts of Europe (Czech Republic, Finland, Germany, Romania, Russia, Sweden, Ukraine), Asia (Korea, Turkey), South America (Brazil), Africa (Egypt), Hawaiian Islands; Azov, Black and Marmora Seas ( Tsarenko et al. 2009; Park et al. 2017b). For Europe this taxon is considered an invasive species ( Handbook of alien species in Europe DAISIE 2009). An upstream colonisation of Pleurosira laevis with help of different vectors for the River Labe was discussed by Fránková-Kozáková et al. (2007).

References

El-Awamri, AF, 2008. Studies on the Morphology of Different Valve Types of the Centric Diatom Species Pleurosira laevis (Ehr.) Compere. Australian Journal of Basic and Applied Sciences 2 (1): 22 - 29

Frankova-Kozakova, M, Marvan, P, Geris, R, 2007. Halophilous diatoms in Czech running waters: Pleurosira laevis and Bacillaria paxillifera. In: Kusber, W-H, Jahn, R, Eds., Proceedings of the 1st Central European Diatom Meeting 2007. Berlin-Dahlem, 23-25 March 2007. Berlin: Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universitaet Berlin: 39 - 44, DOI: https://doi.org/10.3372/cediatom.108

Handbook of alien species in Europe DAISIE, 2009. Invading nature - Springer series in invasion ecology 3 (2nd ed.). New York, 399 pp.

Park, SY, Choi, JS, Kim, JH, Kim, HS, 2017b. Morphology and physico-ecology of two rare freshwater epilithic diatoms: Hydrosera whampoensis and Pleurosira laevis. Nova Hedwigia 105 (1-2): 151 - 166, DOI: https://doi.org/10.1127/nova_hedwigia/2016/0384

Tsarenko, PM, Wasser, SP, Nevo, E, 2009. Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Vol. 2. Bacillariophyta. A.R.A. Gantner Verlag, Ruggell

Figures

Figure 4. SEM (A, B and E-H) and LM (C, D) images of species found in the transitional zone at Mykolaiv city: A-D Pleurosira laevis A, C valve views with arrows shown the ocelli B girdle view E Conticribra weissflogii, valve view with arrows shown central and marginal fultoportulae F Thalassiosira incerta, valve view with arrow shown central fultoportulae G Thalassiosira faurii, valve view H Minidiscus proschkinae, valve view with arrow in the centre shown central fultoportula, and closer to the edge - rimoportula. Scale bars: 10 μm (C-G); 30 μm (A); 50 μm (B); 3 μm (H).