Bessudova Anna, Galachyants Yuri, Firsova Alena, Hilkhanova Diana, Nalimova Maria, Marchenkov Artyom, Mikhailov Ivan, Sakirko Maria, Likhoshway Yelena
Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, 664033 Irkutsk, Russia.
Life (Basel). 2023 Oct 13;13(10):2052. doi: 10.3390/life13102052.
Hydroelectric dams create new ecosystems such as reservoirs. Several hydroelectric dams forming shallow reservoirs were built on the Angara River flowing out of Lake Baikal. The first of them in downstream Angara is Irkutsk Reservoir, with several shallow bays. Since silica-scaled chrysophytes are effective bioindicators for aquatic ecosystems, this paper aimed to determine their distribution, taxonomic structure and species richness in South Baikal and Irkutsk Reservoir, which have different environmental parameters. Thirty-one species were found using scanning and transmission electron microscopy. Only seven of them inhabited South Baikal in June 2023 at 3.66-4.51 °C and pH 7.80-8.24, with , f. and being prevalent. Only one species () was dominant in Irkutsk Reservoir at all stations at a water temperature of 5.33-11.55 °C and pH 8.10-8.52, alongside three other abundant species, cf. , and The maximum number of species (23) was found in a shallow bay of the reservoir at maximal values of temperature (11.5 °C) and pH (8.57) and minimal values of phosphate and nitrate concentrations during the study. The enrichment of Irkutsk Reservoir in species of silica-scaled chrysophytes was due both to cosmopolitan widespread and polyzonal species as well as to rare boreal, arctic-boreal, and unknown, possibly new species.
水电站大坝创造了新的生态系统，如水库。在流出贝加尔湖的安加拉河上建造了几座形成浅水库的水电站大坝。其中位于安加拉河下游的第一座是伊尔库茨克水库，有几个浅湾。由于具硅质鳞片的金藻是水生生态系统的有效生物指示物，本文旨在确定它们在环境参数不同的贝加尔湖南部和伊尔库茨克水库中的分布、分类结构和物种丰富度。通过扫描电子显微镜和透射电子显微镜发现了31个物种。2023年6月，在贝加尔湖南部，水温3.66 - 4.51°C、pH值7.80 - 8.24的条件下，只有7个物种存在，其中 、 f. 和 较为常见。在伊尔库茨克水库，水温5.33 - 11.55°C、pH值8.10 - 8.52时，所有站点只有一个物种（ ）占主导地位，还有其他三个丰富物种，即 cf. 、 和 。在研究期间，水库的一个浅湾在温度（11.5°C）和pH值（8.
