期刊名称：Scientific Annals of the Danube Delta Institute
印刷版ISSN：1842-614X
电子版ISSN：2247-9902
出版年度：2013
卷号：18
期号：24
页码：249-260
语种：English
出版社：Institutul National de Cercetare-Dezvoltare Delta Dunarii
摘要：The present paper is dealing with the responses of phytoplankton community to the thermal gradient and the trend of development of Danube river phytoplankton population, measured in real-time using a submersible spectrofluorometer with automatic algae class determination and chlorophyll analysis. Depth profiles of the distribution of spectral algal groups have been recorded during field investigations carried out along Danube between Rasova (Danube Km 310.3) and Capidava (Danube Km 279) in order to reveal if the phytoplankton development is influenced by the warm water discharged from Nuclear Power Plant Cernavodă. A total number of 214 measurements (temperature, transparence, depth of measurements and phytoplankton biomass) have been performed in 2010 - 2011. Variation of phytoplankton along the investigated sector Danube does not have significant perturbation compared with general development of phytoplankton in the lower Danube river. Phytoplankton biomass decline under the influence of warm water discharges was not recorded during the entire sector of the thermal plume, sometimes being recorded an increase of the phytoplankton biomass which slightly exceeded the threshold of blooming for lotic ecosystems. The increasing or decreasing of chlorophyll-a concentration seams to be related more to the natural biological cycle than to the influence of discharged warm water. Phytoplankton populations from Danube River have a high capacity to adapt to the modification of the temperature. The variation of temperature dose not influence the natural algal class’s composition.
关键词：phytoplankton;submersible spectrophotometer;warm water discharge;Danube River;Nuclear Power Plant;Cernavodă;Romania
