Abstract

In August 2016, the pelagic zooplankton (Cladocera, Copepoda, and Rotifera) and meroplankton (veligers of mollusks of g. Dreissena) were studied in four reservoirs of the Kama River (Kama, Votkinsk, and Nizhnekamsk reservoirs, and the Kama Reach of the Kuibyshev Reservoir). A total of 108 species were found; 14 species were new for the Kama River, including five crustaceans introduced from the Caspian Sea. Three of them (Heterocope caspia, Eurytemora caspica, and Cercopagis pengoi) spread northwards to the Kama Reservoir; two species (Cornigerius maeoticus and Calanipeda aquaedulcis) reached the upstream part of the Kuibyshev Reservoir’s Kama Reach. It is revealed that five southern species (Heterocope caspia, Diaphanosoma orghidani, Pompholyx sulcata, Conochiloides coenobasis and Asplanchna henrietta) first recorded in the Kama River in 2016, locally form high abundance. The summer zooplankton biomass averages 1.8 g/m³ in the Kama Reservoir, 1.3 g/m³ in the Niznekamsk Reservoir, 1.0 g/m³ in the Votkinsk Reservoir, and 0.5 g/m³ in the Kuibyshev Reservoir; its values are similar to those recorded in the 2000s. The changes in species composition, biological invasions, patterns of spatial distribution, and long-term changes in the zooplankton biomass are discussed.

中文翻译：

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卡马河水库浮游动物群落组成和丰度的长期变化

摘要

2016年8月，在卡马河的四个水库（卡马河，沃特金斯克和尼日涅姆卡姆斯克水库以及卡马河河段）研究了浮游浮游动物（克拉科德拉，角足纲动物和轮虫）和浮游动物（克雷德塞纳软体动物的浮游动物）。库比雪夫水库）。共发现108种。卡马河新增了14种，其中包括从里海引进的5种甲壳类。它们中的三个（海豹（Heterocope caspia），Eurytemora caspica和Cercopagis pengoi）向北扩散至卡马水库（Kama Reservoir）。两种（Cornigerius maeoticus和Calanipeda aquaedulcis）到达库比雪夫水库卡玛河段的上游。据透露，南方五种（Heterocope CASPIA，秀体orghidani，汗疱疹苏卡达，Conochiloides coenobasis和晶囊亨丽埃塔）第一记录在卡马河在2016年，局部形成高丰度。夏季浮游动物生物量平均为1.8g /米³的卡马水库，1.3克/米³的Niznekamsk水库，为1.0g / m ³的沃特金斯克水库，和0.5克/米³在库比雪夫水库中；它的值类似于2000年代记录的值。讨论了物种组成，生物入侵，空间分布模式以及浮游生物量长期变化的变化。