Abstract In order to understand the effects of some physical (temperature and salinity) and chemical (dissolved oxygen, nitrate and chlorophyll a) factors on the abundance and distribution of cladoceran species, zooplankton samples were seasonally collected between August 2015 and July 2016 from three stations near the entrance to the Boğaziçi Lagoon in Güllük Bay (Aegean Sea, Turkey) using a WP2 plankton net with a mesh size of 200 μm. Four cladoceran species – Penilia avirostris, Pseudevadne tergestina, Evadne spinifera and Pleopis polyphemoides – were found during all sampling events throughout the study period. They showed high abundance in August (4774 ind. m−3) and October (10 706 ind. m−3) as the dominant zooplankton group. The abundance of Penilia avirostris – the dominant cladoceran at all sampling locations – was estimated up to 10 871 ind. m−3 in October. Pseudevadne tergestina was the second dominant cladoceran. In September, only Pseudevadne tergestina and Pleopis polyphemoides were found in samples in small numbers. The abundance of cladocerans varied significantly throughout the seasons. Two physicochemical factors, temperature and dissolved oxygen, were the main drivers of changes in the cladoceran composition.

中文翻译：

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与生产泻湖中环境因素相关的海洋枝角类动物分布和丰度的时空变化（Güllük 湾，西南爱琴海，土耳其）

摘要 为了了解一些物理（温度和盐度）和化学（溶解氧、硝酸盐和叶绿素 a）因素对枝角类物种丰度和分布的影响，于 2015 年 8 月至 2016 年 7 月从三个站点季节性采集浮游动物样本。在 Güllük 湾（土耳其爱琴海）的 Boğaziçi 泻湖入口附近，使用 WP2 浮游生物网，网孔尺寸为 200 μm。在整个研究期间的所有采样事件中都发现了四种枝角类动物——Penilia avirostris、Pseudevadne tergestina、Evadne spinifera 和 Pleopis polyphemoides。它们在 8 月 (4774 ind. m-3) 和 10 月 (10 706 ind. m-3) 显示出高丰度，作为主要的浮游动物群。Penilia avirostris - 所有采样地点的主要枝角类动物 - 的丰度估计高达 10 871 ind。10 月的 m−3。Pseudevadne tergestina 是第二大优势枝角类动物。9 月，仅在少量样本中发现了 Pseudevadne tergestina 和 Pleopis polyphemoides。枝角类动物的数量在整个季节变化很大。温度和溶解氧这两个物理化学因素是枝角类动物组成变化的主要驱动因素。