Features of the Distribution of Black Sea Ichthyoplankton in Conditions of Activation of Atmospheric Processes in the Summer Hydrological Season of 2021

IF 1.3 4区地球科学 Q4 OCEANOGRAPHY

Oceanology Pub Date : 2024-08-26 DOI:10.1134/s0001437024700176

T. N. Klimova, A. A. Subbotin, I. V. Vdodovich, Yu. A. Zagorodnyaya, D. A. Zabrodin

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Abstract

The article presents the species diversity, abundance, and distribution features of ichthyoplankton and fodder zooplankton in the northern Black Sea in summer 2021. The intensification of cyclonic activity over the Black Sea in June–July slowed the formation of summer-type thermal stratification in the studied water area. At the beginning of July, only 13 species of eggs and fish larvae were observed in ichthyoplankton of the Crimean Peninsula, and their average abundance was 29 and 2 ind./m², respectively. At the beginning of August, summer-type vertical thermal stratification off the coast of the Caucasus had already formed. The number of ichthyoplankton species increased to 20. Activation of atmospheric processes in June–July intensified the intraseasonal wind “pumping” of the upper layer of the sea. The Black Sea Rim Current transformed into a pronounced jet over the continental slope, oriented alongshore, partially extending to the shelf. This did not affect the spawning activity of mass fish species. The average abundance of eggs in the shelf and deep-water zone was about 160 ind./m², and the average abundance of larvae on the shelf was almost five times higher, 452 ind./m².

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2021 年夏季水文季节大气过程激活条件下的黑海鱼类浮游生物分布特征

摘要本文介绍了 2021 年夏季黑海北部鱼类浮游生物和饲料浮游动物的物种多样性、丰度和分布特征。6-7 月间黑海上空气旋活动的加强减缓了研究水域夏季型热分层的形成。7 月初，在克里米亚半岛的鱼类浮游生物中仅观察到 13 种鱼卵和鱼幼体，其平均丰度分别为 29 和 2 ind./m2。8 月初，高加索沿岸已形成夏季型垂直热分层。鱼类种类增至 20 种。6-7 月间大气过程的激活加强了海洋上层的季内风 "抽吸"。黑海环流在大陆坡上空转变为明显的喷流，面向沿岸，部分延伸至陆架。这并未影响大量鱼类的产卵活动。陆架和深水区鱼卵的平均丰度约为 160 ind./m2，而陆架上幼体的平均丰度几乎高出五倍，达到 452 ind./m2。

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来源期刊

Oceanology 地学-海洋学

CiteScore

2.00

自引率

20.00%

发文量

审稿时长

6-12 weeks

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.