Features of Fluorescence Profiles and Species Composition of Phytoplankton in the Black Sea and the Sea of Azov

Fundamental and Applied Hydrophysics Pub Date : 2024-01-09 DOI:10.59887/2073-6673.2023.16(4)-6

О. B. Kudinov, V. Suslin, R. I. Lee, D. A. Ryabokon

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Abstract

The aim of this work was to study the properties of vertical fluorescence intensity (FI) profiles of phytoplankton pigments (chlorophyll-a, phycocyanin, phycoerythrin, and beta-carotene) using data on the phytoplankton species composition obtained during the cruise 114 of the R/V ‘Professor Vodyanitsky’. The analysis of covariance matrices of phytoplankton pigment FI profiles in the upper 50-meter layer of the Black Sea indicates that the pigment composition of phytoplankton changes with depth, which may be associated with changes in its species composition. At the same time, 80 % variability of phytoplankton pigment FI profiles in the upper 20-meter layer is described by the first eigenvector. It agrees well with direct observations of the phytoplankton species composition, indicating the dominance of one phytoplankton division in the 20-meter layer. In addition, there are regional peculiarities: for example, the average FI values of the phytoplankton pigments in the Sea of Azov are significantly higher than those in the Black Sea, which is associated with a higher concentration of phytoplankton in the Sea of Azov.

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黑海和亚速海浮游植物的荧光图谱和物种组成特征

这项工作的目的是利用 "Vodyanitsky 教授号 "考察船在 114 号巡航期间获得的浮游植物物种组成数据，研究浮游植物色素（叶绿素-a、藻蓝蛋白、藻红蛋白和β-胡萝卜素）垂直荧光强度（FI）剖面的特性。对黑海上层 50 米浮游植物色素 FI 剖面协方差矩阵的分析表明，浮游植物的色素组成随深度变化而变化，这可能与其物种组成的变化有关。同时，上 20 米层浮游植物色素 FI 图谱 80% 的变化是由第一个特征向量描述的。这与浮游植物物种组成的直接观测结果十分吻合，表明在 20 米水层中，浮游植物的一个分支占主导地位。此外，还存在区域特殊性：例如，亚速海浮游植物色素的平均 FI 值明显高于黑海，这与亚速海浮游植物浓度较高有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fundamental and Applied Hydrophysics

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