Institute of Biophysics; Federal Research Center "Krasnoyarsk Science Center" of the Siberian Branch of the Russian Academy of Sciences; Krasnoyarsk; Russia; Institute of Fundamental Biology and Biotechnology; Siberian Federal University; Krasnoyarsk; Russia.
Krasnoyarsk Branch of the Federal State Budget Scientific Institution "Russian Federal Research Institute of Fisheries and Oceanography"; Krasnoyarsk; Russia.
Zootaxa. 2023 Jun 21;5306(3):331-348. doi: 10.11646/zootaxa.5306.3.2.
This study provides first data on species composition of trichopterans inhabiting water moss, Fontinalis antipyretica Hedw., in the middle reaches of the Yenisei River. Analysis of Trichoptera larvae collected from samples of water moss in tail waters of the Krasnoyarsk Hydroelectric Plant in 2008-2021 revealed nine species of the order, which belonged to four families. Among them, six species belonging to the Limnephilidae family have not been mentioned in previous studies of the Yenisei invertebrates. Images of species are provided. One species, Apatania crymophyla McLachlan, was the most dense in all samples of water moss. The densities of A. crymophyla in samples of water moss in 2021 ranged within 1.2-7.0 thousand individuals / kg f.w. Other representatives of the order occurred in samples of water moss sporadically or consistently but in very low densities, which did not allow reliable quantification of their abundances. Consequently, numerous large clumps of water moss in the fast-flowing waters of the Yenisei favor an abundance of Trichoptera larvae, providing these insects refuge, food, and material for their cases. However, the reasons for the predominance of one species, A. crymophyla, are to be elucidated in further studies. The present study suggests that the contributions of Trichoptera and the total invertebrate community inhabiting water moss to biomass and energy budgets in the Yenisei have been usually underestimated before now. Hence, seasonal trends of species composition and abundance of invertebrates associated with water moss in the Yenisei River, including comparison with the entire zoobenthic community, are to be studied in the future.
本研究首次提供了栖息于水藓（Fontinalis antipyretica Hedw.）中的蜉蝣目物种组成的数据，该水藓分布于叶尼塞河中游。对 2008 年至 2021 年克拉斯诺亚尔斯克水电站尾水中水藓样本中采集的蜉蝣幼虫进行分析，揭示了该目九个物种，分属于四个科。其中，六个属于 Limnephilidae 科的物种在叶尼塞无脊椎动物的先前研究中并未被提及。提供了物种的图像。一种物种，Apatania crymophyla McLachlan，在所有水藓样本中最为密集。2021 年水藓样本中 A. crymophyla 的密度在 1.2-7.0 千个个体/公斤鲜重之间。该目其他代表在水藓样本中偶有出现或持续出现，但密度非常低，无法可靠地量化它们的丰度。因此，叶尼塞急流中的大量水藓簇为蜉蝣幼虫提供了丰富的栖息地，为它们提供了庇护、食物和筑巢材料。然而，一种物种 A. crymophyla 占优势的原因有待进一步研究阐明。本研究表明，以前通常低估了蜉蝣目以及栖息于水藓中的整个无脊椎动物群落对叶尼塞生物量和能量预算的贡献。因此，未来需要研究叶尼塞河与水藓相关的无脊椎动物物种组成和丰度的季节性趋势，包括与整个底栖动物群落的比较。
