Фитомикробентос солоноватоводных заливов Килийской дельты Дуная
Loading...
Date
2017
Authors
Козийчук, Элина
Щербак, Владимир
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Представлены результаты натурных исследований фитомикробентоса в водах с различной соленостью - от 2,00 до 12,00%о. В солоноватоводных заливах Килийской дельты Дуная установлена зависимость интенсивности развития донных микроводорослей от солености воды: 2,00-5,00, 6,00-8,00 и 9,00-12,00%о. В зоне диапазона солености 2,00-5,00%о увеличивались показатели видового богатства, численности и биомассы фитомикробентоса за счет развития пресноводных видов-олигогалобов разных отделов, при этом доля солоноватоводных видов-мезогалсбов уменьшалась. В зоне выхода в море, при повышении солености до 9,00-12,00%о, наблюдалось интенсивное развитие солоноватоводных и морских форм фитомикробентоса, с малой долей пресноводно-олигогалобных, что повлекло за собой увеличение показателей видового богатства, численности и биомассы донных микроводорослей. В градиенте значений от 6,00 до 8,00%о качественные и количественные показатели развития фитомикробентоса были минимальными, вероятно вследствие действия зоны "критической солености" для донных микроводорослей. Встречались в малом количестве как пресноводные, так и солоноватоводные формы фитомикробентоса.
Results of the study of phytomicrobenthos in water bodies differing in their salinity (from 2.00 to 12.00‰) are given in the paper. In brackishwater bays of the Kiliya delta of the Danube River, relationship was established between the intensity of benthic microalgae development and water salinity: 2.00-5.00, 6.00-8.00, and 9.00-12.00‰. At water salinity of 2.00–5.00‰, species richness, numbers, and biomass of phytomicrobenthos increased at the expense of the development of freshwater oligohalobes, whereas the content of brackishwater mesohalobes decreased. The increase in water salinity to 9.00-12.00‰ was accompanied by the increase in phytomicrobenthos species richness, numbers, and biomass at the expense of the development of its brackishwater and marine forms. In this case, the contribution of freshwater oligohalobes was rather low. At water salinity of 6.00-8.00‰, the intensity of phytomicrobenthos development and its species richness were minimal probably as a result of the influence of the zone of "critical salinity" on benthic microalgae. Both freshwater and brackishwater forms of phytomicrobenthos were found.
Results of the study of phytomicrobenthos in water bodies differing in their salinity (from 2.00 to 12.00‰) are given in the paper. In brackishwater bays of the Kiliya delta of the Danube River, relationship was established between the intensity of benthic microalgae development and water salinity: 2.00-5.00, 6.00-8.00, and 9.00-12.00‰. At water salinity of 2.00–5.00‰, species richness, numbers, and biomass of phytomicrobenthos increased at the expense of the development of freshwater oligohalobes, whereas the content of brackishwater mesohalobes decreased. The increase in water salinity to 9.00-12.00‰ was accompanied by the increase in phytomicrobenthos species richness, numbers, and biomass at the expense of the development of its brackishwater and marine forms. In this case, the contribution of freshwater oligohalobes was rather low. At water salinity of 6.00-8.00‰, the intensity of phytomicrobenthos development and its species richness were minimal probably as a result of the influence of the zone of "critical salinity" on benthic microalgae. Both freshwater and brackishwater forms of phytomicrobenthos were found.
Description
Keywords
фитомикробентос, Килийская дельта Дуная, солоноватоводные заливы, соленость воды, доминирующий комплекс, phytomicrobenthos, the Kiliya delta of the Danube River, brackishwater bays, water salinity, dominant complex
Citation
Козийчук Э. Ш. Фитомикробентос солоноватоводных заливов Килийской дельты Дуная / Э. Ш. Козийчук, В. И. Щербак // Гидробиологический журнал. - 2017. - Т. 53, № 2. - С. 22-36.