Interannual variability in lower trophic levels on the Alaskan Shelf
Interannual variability in lower trophic levels on the Alaskan Shelf
复制标题
DOI：
10.1016/j.dsr2.2017.04.023
复制
发表时间：
2018-01-01
影响因子：
3
通讯作者：
McQuatters-Gollop, Abigail
中科院分区：
文献类型：
--
作者：
Batten, Sonia D.;Raitsos, Dionysios E.;McQuatters-Gollop, Abigail
这项研究描述了连续浮游生物记录仪（CPR）计划的前16年的结果，该计划在阿拉斯加大陆架上对较低的营养级（仅限于较大的硬壳浮游植物和健壮的浮游动物类群）进行了采样。采样发生在从大陆架上的开阔海洋的沿着断面（2000年至2003年到威廉王子湾入口，2004年至2015年到库克湾），以提供每年春季至秋季的浮游生物丰度数据。我们记录了在这段时间内该地区的浮游生物群落的浓度和组成的年际变化。至少在某种程度上和通过相关关系，这可以归因于物理环境的变化，特别是温度的直接和间接影响。例如：春季混合层深度的影响春季硅藻高峰的时间和温暖的年份偏向于较小的桡足类物种。2000年至2013年，温度、硅藻丰度和浮游动物生物量之间存在显著的正相关关系，但在2014年和2015年的温暖年份中不存在。这些结果表明，异常变暖事件，如2014-2015年的“热浪”，可能从根本上影响典型的低营养水平模式，可能改变营养相互作用。
This study describes results from the first 16 years of the Continuous Plankton Recorder (CPR) program that has sampled the lower trophic levels (restricted to larger, hard-shelled phytoplankton and robust zooplankton taxa) on the Alaskan shelf. Sampling took place along transects from the open ocean across the shelf (to the entrance to Prince William Sound from 2000 to 2003 and into Cook Inlet from 2004 to 2015) to provide plankton abundance data, spring through autumn of each year. We document interannual variability in concentration and composition of the plankton community of the region over this time period. At least in part and through correlative relationships, this can be attributed to changes in the physical environment, particularly direct and indirect effects of temperature. For example; spring mixed layer depth is shown to influence the timing of the spring diatom peak and warmer years are biased towards smaller copepod species. A significant positive relationship between temperature, diatom abundance and zooplankton biomass existed from 2000 to 2013 but was not present in the warm years of 2014 and 2015. These results suggest that anomalous warming events, such as the "heat wave" of 2014-2015, could fundamentally influence typical lower trophic level patterns, possibly altering trophic interactions.