In article reports a new find of Pleurocladia lacustris in Ukraine. The species grew in the brackish-water Dnieper Estuary (depth 0.2 m, salinity of estuary water was 4.68‰, temperature – 23 °С, pH – 7.9) P. lacustris is a filamentous benthic species, the cells of which are not calcified here, as in freshwater conditions, but are covered with a slimy sheath. It was found in fouling of bushes of green algae Cladophora glomerata (Linnaeus) Kützing and Ulva flexuosa Wulfen, as well as blue-green (Calothrix C.Agardh ex Bornet & Flahault and Oscillatoria sp.) on a concrete slab in July 2020. The thickets of Potamogeton perfoliatus L., Ruppia maritima L., and Stuckenia pectinata (L.) Börner predominated in the coastal area of the estuary. Color illustrations of the vegetative and generative organs of P. lacustris are presented, its diagnostic macroscopic and microscopic characteristics are shown, which turned out to be somewhat larger than the data of the determinants. The ecological characteristics of the algae habitat meet the known requirements. This rare species is known in about 50 localities in Europe, North America, Australia and Africa. In many countries P. lacustris is considered an endangered species and is included in the protected red lists.

Keywords: Pleurocladia lacustris, rare species, Dnieper Estuary, Black Sea, Ukraine

Full text: PDF 732K

1. Arnoldi W. 1909. Streblonema longiseta n. spec. Flora. 99: 452–472. https://doi.org/10.1016/S0367-1615(17)32278-4
2. Eloranta P., Kwandrans J., Kusel-Fetzmann E. 2011. In: Süsswasserflora von Mitteleuropa. Vol. 7. Heidelberg: Spektr. Akad. Verlag. 155 p.
3. Guiry M.D., Guiry G.M. 2020. AlgaeBase. World-wide electron. publ. Nat. Univ. Ireland, Galway. http://www.algaebase.org; searched on 30 July 2020
4. Ilyin Yu.P., Ryabinin A.I., Shibaeva S.A., Klimenko N.P., Mezentseva I.V., Malchenko Yu.A., Sadykova L.V. 2006. Sci. works Ukr. Res. Hydromet. Inst. 255: 152–165. [Ильин Ю.П., Рябинин А.И., Шибаева С.А., Клименко Н.П., Мезенцева И.В., Мальченко Ю.А., Садыкова Л.В. 2006. Результаты мониторинга гидрохимического состояния и загрязнения Азовского и Черного морей в 2001-2005 гг. Наук. праці УкрНДГМІ. 255: 152-165].
5. Kalugina-Gutnik А.А. 1975. Fitobenthos of Black Sea. Кyiv: Naukova Dumka. 274 p. [Калугина-Гутник А.А. 1975. Фитобентос Черного моря. Киев: Наук. думка. 274 с.].
6. Moshkova N.О., Frolova І.О. 1983. In: Identification manual of freshwater algae of the Ukrainian RSR. Issue XII. Кyiv: Naukova Dumkа. 208 p. [Мошкова Н.О., Фролова І.О. 1983. Червоні та бурі водорості (Phodophyta, Phaeophyta). В кн.: Визначначник прісноводних водоростей Української РСР. Вип. ХІІ. Київ: Наук. думка. 208 с.].
7. de Reviers B., Rousseau F., Draisma S.G.A. 2007. In: Unravelling the Algae: the past, present, and future of algal systematics. Boca Raton: CRC Press. Pp. 267–284. https://doi.org/10.1201/9780849379901.ch14
8. Тkachenkо F.P., Yakuba I.P. 2019. Algologia. 29(3): 278–286. [Ткаченко Ф.П., Якуба И.П. 2019. Содержание фукоксантина в некоторых черноморских бурых водорослях (Phaeophyceae, Ochrophyta). Aльгология. 29(3): 278-286]. https://doi.org/10.15407/alg29.03.278
9. Vinogradova K.L., Gollerbach М.М., Zauer L.М., Sdobnikovа N.V. 1980. In: Identification manual of freshwater algae of the USSR. Issue 13. Leningrad: Naukа. 248 p. [Виноградова К.Л., Голлербах М.М., Зауер Л.М., Сдобникова Н.В. 1980. Зеленые, красные и бурые водоросли. В кн.: Определитель пресноводных водорослей СССР. Вып. 13. Л.: Наука. 248 с.].
10. Vishnyakov V.S. 2018. Algologia. 28(1): 78–88. [Вишняков В.С. 2018. Первая находка пресноводной бурой водоросли Heribaudiella fluviatilis (Phaeophyceae) в Сибири (Россия). Альгология. 28(1): 78–88. https://doi.org/10.15407/alg28.01.078
11. Voronikhin N.N. 1932. Bot. J. USSR. 17(3): 265–325. [Воронихин Н.Н. 1932. К познанию флоры и растительности водорослей пресных водоемов Крыма. Бот. журн. СССР. 17(3): 265-325].
12. Wehr J.D. 2016. Brown algae (Phaeophyceae) in rivers. In: River algae. Cham: Springer Int. Publ. Pp. 129–151. https://doi.org/10.1007/978-3-319-31984-1_6
13. Wehr J.D., Stancheva R., Truhn K., Sheath R.G. 2013. Discovery of the rare freshwater brown alga Pleurocladia lacustris (Ectocarpales, Phaeophyceae) in California streams. West. North Amer. Nat. 73(2): 148–157. https://doi.org/10.3398/064.073.0204
14. Wilce R.T. 1966. Pleurocladia lacustris in Arctic America. J. Phycol. 2: 57–66. https://doi.org/10.1111/j.1529–8817.1966.tb04595.x https://www.ncbi.nlm.nih.gov/pubmed/27053316