黑海表层水域的营养动态

IF 0.7 Q4 OCEANOGRAPHY
N. Orekhova
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引用次数: 1

摘要

目的。水质和海洋生态系统可持续性的关键特征之一是养分供应,而养分供应是浮游植物繁殖的主要因素。20世纪中期以来,黑海西北部及其西部陆架的营养物浓度发生了显著变化,表现为无机氮、磷浓度增加,溶解硅含量减少,从而导致上述地区发生了强烈的人为富营养化。这项工作的目的是根据有关黑海表层水层营养物分布和动态的数据来评估黑海的现状。方法与结果。分析了2016-2019年Vodyanitsky教授号R/V巡航中获得的数据。正在研究的主要区域包括黑海的深海部分,以及俄罗斯经济区的克里米亚和高加索部分。获得的数据显示,沿海和开阔地区的营养物质浓度存在显著差异。结论。与2009-2014年相比,2016-2019年营养物浓度有所下降,说明黑海水体富营养化程度有所降低,水质有所改善。观测了海表层营养物浓度的年际变化。该层营养物浓度的空间变异性特征不明显。据推测,在海洋的中心深处,它们的浓度主要受水转移的物理过程的支配。除了物理运输外,沿海地区营养物质浓度的增加可能还与人为因素的影响有关,即从沿海来源流入的营养物质或由有机物质的生物地球化学过程形成的营养物质。项目编号:18-05-80028“克里米亚和刻赤海峡沿海地区缺氧和硫化氢条件发展中的水动力学和生物地球化学过程的研究和标度”(黑海沿海地区获得的数据分析)和21-55-52001“比较结构”。东海和黑海有和没有蓝藻原绿球藻的海洋浮游植物群落的功能和生态位分化”。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nutrients Dynamics in the Surface Waters of the Black Sea
Purpose. One of the key characteristics of water quality and marine ecosystems’ sustainability is nutrients supply, which are the main factors of phytoplankton bloom. Since the mid-20 th century, in the northwestern Black Sea and on its western shelf significant changes in nutrients concentrations took place, which were manifested in increase of the inorganic nitrogen and phosphorus concentrations and decrease of the dissolved silicon content, that in its turn, led to a strong anthropogenic eutrophication of the above-mentioned regions. The aim of the work is to assess the current state of the Black Sea based on the data on the nutrients distribution and dynamics in the surface water layer. Methods and Results. The data obtained in the cruises of R/V Professor Vodyanitsky in 2016–2019 were analyzed. The main regions under study included the deep part of the Black Sea, as well as the Crimean and Caucasian sectors of the economic zone of Russia. The data obtained showed significant variability in the nutrients concentration both in the coastal and open areas. Conclusions. A decrease of nutrients concentration in 2016–2019 as compared to that in 2009–2014 was noted, that can indicate a decrease in the eutrophication degree and an improvement of the Black Sea waters quality. Intra-annual variability of the nutrients concentration in the sea surface layer is observed. No pronounced features in spatial variability of the nutrients concentration in this layer were revealed. It is assumed that in the central deep part of the sea, their concentrations are governed mainly by the physical processes of water transfer. In addition to physical transport, the increased nutrients concentrations in the coastal areas are, probably, also related to influence of the anthropogenic factor, namely inflow of nutrients from the coastal sources or their formation resulting from the biogeochemical processes with organic matter. 0555-2021-0004, and the RFBR projects No. 18-05-80028 “Studies and scaling of water dynamics and biogeochemical processes in development of oxygen deficit and sulfidic conditions in coastal areas of the Crimea and the Kerch Strait” (analysis of the data obtained in the coastal regions of the Black Sea) and No. 21-55-52001 “Comparing structure, functions and niche differentiation in marine picophytoplankton communities with and without Prochlorococcus cyanobacteria in the East China Sea and the Black Sea”.
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来源期刊
Physical Oceanography
Physical Oceanography OCEANOGRAPHY-
CiteScore
1.80
自引率
25.00%
发文量
8
审稿时长
24 weeks
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