Abstract

The structure of phytoplankton of the Sea of Japan (Peter the Great Bay), located in the zone influenced by the technical ecosystem of Vladivostok thermal electric power station (VTES-2) (Vladivostok), has been studied throughout the year in the period 2014‒2015. Thermal pollution is two-stage: in the water intake trough, the water temperature rises by 2–3°C compared to background values; directly in the VTES-2 cooling system, by 10–12°C. In the first case, an increase compared to background (reference) areas in the abundance of algae and an extension of the summer–autumn vegetation season of phytoplankton by 1.5–2.0 months were noted. After passing through the cooling system of the power plant, the species composition of phytoplankton changes insignificantly (similarity coefficient value 0.82), but is enriching in benthic diatoms (22 species) from the biofouling of the intake trough. The difference in the values of indices of the total density and biomass of microalgae before and after passing through the cooling system of the power plant during the year did not exceed one order of magnitude. The study revealed that the VTES-2 technical ecosystem significantly affects the quantitative change in phytoplankton at the stage of long-term, but insignificant, thermal effect in the water intake trough, as well as during short-term passage through the cooling system.

中文翻译：

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发电厂（符拉迪沃斯托克）的技术生态系统对日本海浮游植物的影响

摘要

位于海参period火力发电厂（VTES-2）（符拉迪沃斯托克）的技术生态系统影响的地区的日本海（彼得大湾）浮游植物的结构已在2014年全年进行了研究‒2015年。热污染分为两个阶段：在进水槽中，水温与背景温度相比上升了2-3°C；直接在VTES-2冷却系统中冷却10–12°C。在第一种情况下，藻类丰富度与背景（参考）面积相比有所增加，浮游植物的夏秋季植被季节延长了1.5-2.0个月。经过电厂的冷却系统后，浮游植物的种类组成变化不大（相似系数值为0.82），但由于进水槽的生物污染而使底栖硅藻（22种）富集。年内，通过电厂冷却系统前后的微藻总密度和生物量指标值的差异不超过一个数量级。研究表明，VTES-2技术生态系统在长期（但不重要）对取水槽的热效应以及短期通过冷却系统的过程中，会显着影响浮游植物的数量变化。