Abstract

In 2021, Acanthocyclops trajani Mirabdullayev et Defaye, 2002, was first recorded in the Vistula Lagoon of the Baltic Sea. This species quickly spread throughout the water area of the Lagoon. In summer, A. trajani reached its maximum development (up to 92 thous. ind./m³, 2.4 g/m³); it was a dominant, forming a particularly high proportion of zooplankton in the most polluted, desalinated, and eutrophicated eastern part of the Vistula Lagoon. As a result of predatory feeding, A. trajani exerted significant pressure on the planktonic communities of the lagoon; its diet in August exceeded the production of nonpredatory zooplankton. The pressure on zooplankton increased even more due to the mass development of Cercopagis pengoi (Ostroumov, 1891), with which the new species entered into competitive relationships. The main reasons for the successful naturalization of A. trajani in the Vistula Lagoon, apparently, include some features of its biology, the structure of the plankton community with the presence of unoccupied trophic niches, the continued eutrophication of this waterbody, decreasing pressure of the invasive mollusk Rangia cuneata (G.B. Sowerby, 1831), and the local climate warming noted in recent decades.

中文翻译：

---

波罗的海维斯瓦河泻湖中棘突棘突龙（桡足类，独眼龙科）的首次记录

摘要

2021年，Acanthocyclops trajani Mirabdullayev et Defaye, 2002首次在波罗的海的维斯瓦泻湖中被记录到。该物种迅速传播到整个泻湖水域。夏季，A. trajani达到最大发育（可达 92 千 ind./m ³ , 2.4 g/m ³）；在维斯瓦泻湖污染最严重、海水淡化和富营养化的东部地区，它占据了主导地位，在浮游动物中所占比例特别高。由于掠食性进食，特拉贾尼对泻湖的浮游生物群落造成了巨大的压力。八月份它的饮食量超过了非掠食性浮游动物的产量。由于Cercopagis pengoi的大规模发展（Ostroumov，1891），新物种与它们建立了竞争关系，浮游动物的压力进一步增加。显然， A. trajani在维斯瓦泻湖成功归化的主要原因包括其生物学的一些特征、浮游生物群落的结构以及未占据的营养位的存在、该水体的持续富营养化、水体压力的降低。入侵性软体动物Rangia cuneata (GB Sowerby, 1831)，以及近几十年来注意到的当地气候变暖。