Intra-annual seasonal variability of surface zooplankton distribution patterns along a 110°E transect of the Southern Ocean in the austral summer of 2011/12
Intra-annual seasonal variability of surface zooplankton distribution patterns along a 110°E transect of the Southern Ocean in the austral summer of 2011/12
复制标题
2011/2012年南半球夏季沿南大洋东经110°横断面表面浮游动物分布模式的年内季节性变化
DOI：
10.1016/j.polar.2016.06.009
复制
发表时间：
2017
期刊：
影响因子：
1.8
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Takahashi;K.T.;Hosie;G.W.;Odate;T.
季节循环可以洞察浮游动物与环境之间的相互作用。然而，在南大洋开展的年度内季节性研究很少。利用连续浮游生物记录仪，分别于2011年12月、2012年1月和3月对110°E子午线三个断面的小型和中型浮游动物的组成、分布和丰度进行了调查。极锋带和南极带的浮游动物丰度在白天和黑夜都很高，共179.0-300.9个−3。在极锋带和南极带的群落中，小型的桡足类占绝对优势。各样带浮游动物总丰度相对一致。3月份亚利桑那州夜间的丰度水平仍然很高，桡足类的丰度很高。这种季节性波动似乎受到新人口招募的影响。除1月初AZ地区的有孔虫外，大多数核心种/分类群的丰度都呈下降趋势。多船年度内季节性调查将有助于查明其各种区域和/或季节分布模式，以及环境变化对南大洋中上层生态系统的影响。
Seasonal cycles can provide insight into the interactions between zooplankton and the environment. However, few intra-annual seasonal studies have been undertaken in the Southern Ocean. We investigated the composition, distribution, and abundance of micro- and meso-zooplankton along the 110°E meridian with three transects in December 2011, January and March 2012 using a Continuous Plankton Recorder. High zooplankton abundance was recorded in the Polar Frontal Zone (PFZ) and the Antarctic Zone (AZ) in both day and night at all transects with 179.0–300.9 ind. m−3. The small copepodsOithona similis,Ctenocalanus citer, and copepodites indet (copepod indeterminable) were dominant in the PFZ and AZ communities. Total zooplankton abundance was comparatively consistent among transects. Nighttime abundance levels remained high in the AZ in March with high abundance of copepodites indet. This seasonal fluctuation appeared to be influenced by recruitment of new populations. Most core species/taxa, except forO. similis,C. citer, and foraminiferans in the AZ area in early January, exhibited a diel decrease in abundance. A multi-ship intra-annual seasonal survey will help detect their various regional and/or seasonal distribution patterns, and the impacts of environmental change on Southern Ocean pelagic ecosystems.