Meso-zooplankton abundance and spatial distribution off Lutzow-Holm Bay during austral summer 2007-2008
Meso-zooplankton abundance and spatial distribution off Lutzow-Holm Bay during austral summer 2007-2008
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2007-2008 年南方夏季 Lutzow-Holm 湾中型浮游动物丰度和空间分布
DOI：
10.1016/j.polar.2016.09.002
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发表时间：
2017
期刊：
影响因子：
1.8
通讯作者：
and M. Fukuchi
中科院分区：
文献类型：
--
作者：
Makabe;R.;A. Tanimura;T. Tamura;D. Hirano;K. Shimada;F. Hashihama;and M. Fukuchi
2008年1月，在<s:1>佐霍尔姆湾（lzow - holm Bay）进行了60 μm网的垂直捕集，研究了局域尺度下浮游动物群落结构的空间差异。在0 ~ 100、100 ~ 200和200 ~ 500 m 3层采集的7个站点浮游动物样本均以oithonaspp、oncaeasp为主。、Ctenocalanus citer、Microcalanus pygmaeus和桡足动物nauplii。中浮游动物丰度的聚类分析显示，根据取样深度不同，中浮游动物丰度呈现出3个不同的类群，这可能是由于优势桡足类优先垂直分布所致。500 m以上综合丰度的聚类分析表明，观测区西部和东部边缘站（聚类A）的浮游动物群落结构与中心站（聚类B）不同。桡足动物丰富。,并且,着这可能是由于优势桡足类在招募和早期发育方面的差异，与冰缘华的时间和持续时间有关。这表明，这种优势类群的丰度和补充/发展的异质性可能是由海冰动态的局部异质性引起的。这可能会影响我们对浮游动物分布的理解。
To elucidate spatial differences in mesozooplankton community structure in local scale, vertical hauls using a 60-μm mesh closing net were carried out off Lützow-Holm Bay in January 2008. All of the zooplankton samples collected from three layers (0–100, 100–200, and 200–500 m) at seven stations were dominated byOithonaspp.,Oncaeaspp.,Ctenocalanus citer,Microcalanus pygmaeus, and copepod nauplii. The cluster analysis of mesozooplankton abundances showed three distinct groups according to sampling depth, which appeared to be due to the preferential vertical distribution of dominant copepods. The other cluster analysis on integrated abundance upper 500 m revealed that mesozooplankton community structures at stations located on the western and eastern edges of the observation area (Cluster A) differed from those at the central stations (Cluster B). Abundance of copepod nauplii,Oithonaspp., andC.citerdiffered between Clusters A and B, which was likely caused by differences in recruitment and early development in the dominant copepods, being associated with the timing and duration of ice edge blooms. This suggests that such heterogeneity in abundance and recruitment/development of dominant taxa was likely caused by local heterogeneity in sea ice dynamics. This may affect our understanding of zooplankton distribution.