Multiscale control of bacterial production by phytoplankton dynamics and sea ice along the western Antarctic Peninsula: A regional and decadal investigation
Multiscale control of bacterial production by phytoplankton dynamics and sea ice along the western Antarctic Peninsula: A regional and decadal investigation
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DOI：
10.1016/j.jmarsys.2012.03.003
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发表时间：
2012-09-01
影响因子：
2.8
通讯作者：
Erickson, Matthew
中科院分区：
文献类型：
--
作者：
Ducklow, Hugh W.;Schofield, Oscar;Erickson, Matthew
我们提供了在南极半岛西部沿着的九次年度夏季巡航中收集的浮游植物和细菌产量以及相关水文特性的结果。这一区域受海冰覆盖的持续时间和范围的年际变化的影响很大，因此有必要进行十年尺度的研究。我们的研究区域从夏季冰川径流影响的近岸区域过渡到以南极绕极流为主的近海斜坡区域。夏季细菌组合是春季海冰退缩后季节性变暖和淡化的产物，并且在不断发展的水体中发生浮游生物演替。细菌的生产率平均为20 mg Cm（-2）d（-1），占初级生产力（PP）的比例很低（5%）。有显着的变化，BP地区和年份之间，反映了海冰，叶绿素和PP的变化。亮氨酸掺入量显著相关（r（2）在0.2-0.7之间，P
We present results on phytoplankton and bacterial production and related hydrographic properties collected on nine annual summer cruises along the western Antarctic Peninsula. This region is strongly influenced by inter-annual variations in the duration and extent of sea ice cover, necessitating a decade-scale study. Our study area transitions from a nearshore region influenced by summer runoff from glaciers to an offshore, slope region dominated by the Antarctic Circumpolar Current. The summer bacterial assemblage is the product of seasonal warming and freshening following spring sea ice retreat and the plankton succession occurring in that evolving water mass. Bacterial production rates averaged 20 mg C m(-2) d(-1) and were a low (5%) fraction of the primary production (PP). There was significant variation in BP between regions and years, reflecting the variability in sea ice, chlorophyll and PP. Leucine incorporation was significantly correlated (r(2) ranging 0.2-0.7, p