Abstract

Phytoplankton composition, development, and distribution, as well as hydrooptical characteristics, were studied in mesotrophic drainless Lake Krasilovskoe (Altai krai, Russia) in March and August 2017, and February 2018. Phytoplankton comprised 147 taxa with a rank below genus. In winter, the phytoplankton abundance was 0.03–1.06 × 10⁶ cells/L, biomass 0.2–12.2 g/m³, and Chl a content 1.8–24.1 mg/m³ at a snow depth of 0.13–0.34 m, ice thickness of 0.56–0.70 m, and water temperature of 0.1–4.5°C. Summer phytoplankton was characterized by higher values of indicators of development (0.11–1.74 × 10⁶ cells/L, 0.6–18.2 g/m³, and 27.5–83.4 mg/m³ Chl a, respectively). A positive relationship between the Chl a content and the absorption coefficient in the range of 400–460 and 670–800 nm and the total phytoplankton abundance and absorption coefficient in the range of 520–580 nm was found both in winter and summer periods. This indicates that active photosynthesis in algae takes place not only in summer, but also during the ice period.

中文翻译：

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利用水光学特性分析大陆水域生物群落的状态

摘要

于2017年3月，8月和2018年2月在中营养营养性无排水的克拉西洛夫斯科湖（俄罗斯阿尔泰边疆区）研究了浮游植物的组成，发育和分布以及水光学特性。浮游植物包括147个分类低于属的类群。在冬季，浮游植物丰度为0.03-1.06×10 ⁶个细胞/ L，生物质0.2-12.2克/米³，和叶绿素一个内容1.8-24.1毫克/米³以0.13-0.34微米的雪深，的冰厚0.56-0.70 m，水温为0.1-4.5°C。夏季浮游植物的特征在于较高的发育指标值（0.11–1.74×10 ⁶细胞/L、0.6–18.2 g / m ³和27.5–83.4 mg / m ³ Chl a， 分别）。叶绿素之间的正关系 一个内容并在400-460和670-800纳米，520-580纳米范围内的总浮游植物丰度和吸收系数的范围内的吸收系数在冬季和夏季期间被发现两者。这表明藻类中的活跃光合作用不仅发生在夏季，而且发生在冰期。