Zooplankton samples were collected using 505, 160 and 77 µm mesh nets around a power plant during four seasons in 2011. We measured total length of zooplankton and divided zooplankton into seven size classes in order to explore how zooplankton community size-structure might be altered by thermal discharge from power plant. The total length of zooplankton varied from 93.7 to 40 074.7 µm. The spatial distribution of mesozooplankton (200 −2 000 µm) populations were rarely affected by thermal discharge, while macro- (2 000 −10 000 µm) and megalo-zooplankton (>10 000 µm) had an obvious tendency to migrate away from the outfall of power plant. Thus, zooplankton community tended to become smaller and biodiversity reduced close to power plant. Moreover, we compared the zooplankton communities in three different mesh size nets. Species richness, abundance, evenness index and Shannon-Wiener diversity index of the 505 µm mesh size were significantly lower than those recorded from the 160 and 77 µm mesh size. Average zooplankton abundance was highest in the 77 µm mesh net ((27 690.0±1 633.7) ind./m³), followed by 160 µm mesh net ((9 531.1±1 079.5) ind./m³), and lowest in 505 µm mesh net ((494.4±104.7) ind./m³). The ANOSIM and SIMPER tests confirmed that these differences were mainly due to small zooplankton and early developmental stages of zooplankton. It is the first time to use the 77 µm mesh net to sample zooplankton in such an environment. The 77 µm mesh net had the overwhelming abundance of the copepod genus Oithona, as an order of magnitude greater than recorded for 160 µm mesh net and 100% loss through the 505 µm mesh net. These results indicate that the use of a small or even multiple sampling net is necessary to accurately quantify entire zooplankton community around coastal power plant.

中文翻译：

---

半封闭式海湾电厂在热应力作用下浮游动物群落的大小-结构变化及网孔尺寸选择

在2011年的四个季节中，使用505、160和77 µm网格网在电厂周围收集了浮游动物样本。我们测量了浮游动物的总长度，并将浮游动物分为七个大小等级，以探讨如何通过以下方式改变浮游动物群落的大小结构。发电厂的热量排放。浮游动物的总长度为93.7至40 074.7 µm。中游浮游动物（200 −2 000 µm）的空间分布很少受到热释放的影响，而大型浮游动物（2 000 −10 000 µm）和巨游浮游动物（> 10000 µm）有明显的迁移趋势。发电厂的排污口。因此，浮游植物群落趋于变小，靠近电厂的生物多样性减少。此外，我们在三种不同网眼尺寸的网中比较了浮游动物群落。物种丰富度 505 µm筛目的丰度，均匀度指数和Shannon-Wiener分集指数显着低于160和77 µm筛目的记录。77 µm网眼平均浮游动物的丰度最高（（27 690.0±1 633.7）ind./m³），其次是160 µm网状网（（9 531.1±1 079.5）ind./m ³），最低是505 µm网状网（（494.4±104.7）ind./m ³）。ANOSIM和SIMPER测试证实了这些差异主要是由于浮游动物较小和浮游动物的早期发育所致。在这样的环境下，这是第一次使用77 µm的网眼对浮游动物进行采样。77 µm筛网的the足类Oithona菌具有压倒性的丰富度，比160 µm筛网的记录数高一个数量级，并且通过505 µm筛网的损失为100％。这些结果表明，使用一个小的甚至多个采样网来准确量化沿海电厂周围的整个浮游动物群落是必要的。