ABSTRACT

Cladophora spp. constantly or periodically form floating and benthic mats in Crimean hypersaline lakes and lagoons. In 2017–2018, characteristics of the Cladophora mats and the microalgae on Cladophora filaments were studied employing field research and microscopy. The whole Cladophora mat has a vertical structure, including the upper and lower layers of the floating mat and benthic mat. In total, 50 species of microalgae were found: 40 of them belonged to Bacillariophyta (Bacillariophyceae and Mediophyceae), two to Haptophyta (Coccolithophyceae), four to Miozoa (Dinophyceae), one to Chlorophyta (Zygnematophyceae) and three to Cyanobacteria (Cyanophyceae). Floating layers of the mat differed significantly in species composition from the benthic mat. The total abundance of microalgae and their biomass on Cladophora (per unit area of filaments) varied widely within sampling sites from 3.79 × 10⁶ to 5.04 × 10⁸ cells m^–2 and 2.6 to 2197.8 mg m^–2. The total mass of microalgae achieved more than 32% of the mass of Cladophora, averaging 7.7% (standard deviation = 13.3).

摘要

枝藻属 不断或周期性地在克里米亚高盐度湖泊和泻湖中形成漂浮的和底栖的垫子。在 2017-2018 年，通过实地研究和显微镜研究了Cladophora垫子和Cladophora细丝上的微藻的特征。整个枝形藻地垫为垂直结构，包括上、下两层浮垫和底栖垫。总共发现了50种微藻：其中40种属于Bacillariophyta（Bacillariophyceae和Mediophyceae），2种属于Haptophyta（Coccolithophyceae），4种属于Miozoa（Dinophyceae），1种属于Chlorophyta（Zygnematophyceae）和3种属于Cygnematophyceacteria。垫子的漂浮层在物种组成上与底栖垫子有显着差异。Cladophora上微藻及其生物量的总丰度（每单位细丝面积）在采样点内变化很大，从 3.79 × 10 ⁶到 5.04 × 10 ^{8 个}细胞 m ^–2和 2.6 到 2197.8 mg m ^–2. 微藻的总质量达到了Cladophora质量的 32% 以上，平均为 7.7%（标准偏差 = 13.3）。