摘要
2001年11月2—3日和12月8—10日在台湾南湾12个测站分别用2种锥形浮游生物网(网长 180cm,网口直径 45cm,筛绢网目孔径 333μm和 200μm)采集表层和底层(水深约50m)92份浮游动物样品。共鉴定出管水母31种,其中有7种是台湾周围海域新记录。舟状玫瑰水母Rosacea cymbiformis 为我国海域首次记录。爪室水母 Chelophyes appendiculata、巴斯水母Bassia bassensis、拟双生水母 Diphyes bojani、异双生水母 Diphyes dispar、小拟多面水母Abylopsis eschscholtzi 和扭歪爪室水母Chelophyes contorta 为优势种,它们分别占11月和12月管水母类总量的76%和63%以上。南湾管水母类的种类数和个体丰度均以 12 月(25种,1.99个·m-3)明显多于11月(19种,0.438个·m-3),这与12月外海高盐水团增强有关。大部分测站表层的种类和个体数多于底层。讨论了2种网型浮游生物网的采集效果,并比较了南湾与邻近海域同期管水母类种类数、丰度的季节变化和区系性质。
Zooplankton surveys were carried out in November 2-3 and December 8-10, 2001 at 12 sampling stations in the Nanwan Bay of Taiwan Island. Up to 92 zooplanktonic samples were collected from the subsurface and bottom layers with two conical plankton nets (180cm in length, 45cm in opening diameter, 333 μm and 200 μm in mesh size). Totally 31 species of siphonophores were identified. Among them, 7 species were new records in the waters around the Taiwan Island, of which Rocacea cymbiformis was a new record in China. These samples were dominated by Chelophyes appendiculata, Bassia bassensis, Diphyes bojani, Diphyes dispar, Abylopsis eschscholtzi and Chelophyes contorta, which accounted for over 76% and 63% of the total abundance in November and December. The species number and siphonophores abundance were more and higher in December (25 species, 1.99 ind·m^(-3)) than in November (19 species, (0.438) ind·m^(-3)), and in the subsurface water layer than in the bottom layer at most sampling stations. In early winter, the offshore hyperhyline water mass was the main factor influencing the distribution. The sampling efficiency of two plankton nets were discussed and the seasonal variations of species number and abundance of siphonophores in the Nanwan Bay and in the neighbouring waters were compared.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2005年第1期41-49,共9页
Journal of Tropical Oceanography
基金
台湾NSC计划(902621 B019001 A10)
福建省自然科学基金项目(D97009)
