K. D. Korobchenkova, S. V. Aleksandrov, A. S. Semenova, Zh. I. Stont, M. O. Ulyanova
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引用次数: 0
Abstract
The patterns of changes in the composition and quantity of zooplankton and concentration of chlorophyll a in the estuary of the Pregolya River and adjacent waters of the Baltic Sea are considered depending on hydrological and meteorological conditions in 2021–2022. Three zones of the estuary were identified: estuarine, mixing, and marine. In the water mixing zone, there are salinity gradients, the position of which is influenced by wind forcing and river discharge. The largest concentration of chlorophyll a was noted in the estuarine zone and at the boundary of the water mixing zone, where the flow of nutrients from the drainage area is most noticeable. The removal of water from the lagoon affects the concentration of chlorophyll a and the composition of zooplankton. The estuarine zone is characterized by the highest level of eutrophication, where it approaches the threshold of hypertrophy; in the marine zone, the concentrations of chlorophyll a corresponded to eutrophic water. Depending on the inflow–outflow phenomena, the proportion of zooplankton species differs in relation to changes in salinity, and there is a sharp increase in deaths of organisms of species not adapted to a given salinity.
摘要 根据 2021-2022 年的水文和气象条件，研究了普雷戈利亚河河口及波罗的海邻近水域浮游动物的组成和数量以及叶绿素 a 浓度的变化规律。确定了河口的三个区域：河口区、混合区和海洋区。在水体混合区，存在盐度梯度，其位置受风力和河流排水量的影响。叶绿素 a 的最大浓度出现在河口区和水体混合区的边界，这里是排水区营养物质流动最明显的地方。泻湖的水量减少会影响叶绿素 a 的浓度和浮游动物的组成。河口区的富营养化程度最高，接近富营养化临界值；在海洋区，叶绿素 a 的浓度与富营养化水体相对应。根据流入-流出现象，浮游动物物种的比例随盐度的变化而变化，不适应特定盐度的物种的死亡数量急剧增加。
期刊介绍：
Oceanology, founded in 1961, is the leading journal in all areas of the marine sciences. It publishes original papers in all fields of theoretical and experimental research in physical, chemical, biological, geological, and technical oceanology. The journal also offers reviews and information about conferences, symposia, cruises, and other events of interest to the oceanographic community.
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