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夏季白令海浮游动物的分布

【标题】夏季白令海浮游动物的分布

【Title】DISTRIBUTION OF THE ZOOPLANKTON IN BERING SEA IN SUMMER

【作者】 林景宏; 戴燕玉; 林茂; 杨清良; 张金标; 林更铭

【Author】 Lin Jinghong ; Dai Yanyu ;

【期刊】极地研究

【Journal】

【期刊年份】2002

【卷】14

【期】

【关键词】 白令海; 浮游动物; 分布

【Keywords】

【摘要】本文报道了 1 999年夏季白令海中部浮游动物的分布特征。初步鉴定共有 90种浮游动物 ,它们分别隶属于北极、亚北极、大洋冷水和世界广温等四种生态类群 ,但以亚北极类群为主导 ,尤以太平洋亚北极外海广深种布氏真哲水蚤、羽哲水蚤、晶额哲水蚤和太平洋腹水蚤等占优势 ,呈现太平洋亚北极外海浮游动物的群落特征。在水平方向上 ,浮游动物总生物量 (均值为42 5 .4mg/m3)介于 70— 1 1 30mg/m3之间 ,呈现南侧高于北侧 ,周边高于中央的平面分布格局。在垂直方向上 ,5 0 0m以浅水域浮游动物总生物量日均值以 5 0— 0m层最高 ( 4 3% ) ,2 0 0— 1 0 0m层最低 ( 8.4% )。此外 ,在 1 0 0m以浅水层中浮游动物总生物量的垂直分布具显著的昼夜变化 ,高值层呈现白天下降、夜晚上升的分布节律 ,不同种群浮游动物分布的水层不尽相同 ,甚至同一种群不同发育阶段的个体分布的水层亦不同。

【Abstract】A total of 90 species of zooplankton were found and recorded in samples collected in the Bering Sea (55° 59′-60° 40′N, 173° 21′E-175° 54′W) by the Chinese First Arctic Scientific Expedition during the period from July to August in 1999. These species can divided into 4 ecological groups of arctic, sub arctic, oceanic cool water and world wide eurytherma, The most important group was sub arctic whidh was dominated by Eucalanus bungii , Calanus plumchrus , C. cristatus and Metridia pacifica and characterised by sub arctic community of the pacific ocean. The total zooplankton biomass reached 425.4mg/m 3 , showing a high to low biomass distribution from south to north and from peripheral to centre. Vertically, it was high (43%) in layer of 50-0m and low (8.4%) in layers of 200-100m in deep waters (<500m) and the pattern varied significantly with maximum biomass moving to deeper waters during the daytime and toward the surface at night in shallow waters (<100m). The distribution of populations were different in water layers and ever it varied with different developing stages for the same population.

【基金/项目】

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