Interdecadal variability in the Gulf of Maine zooplankton community, with potential impacts on fish recruitment
Interdecadal variability in the Gulf of Maine zooplankton community, with potential impacts on fish recruitment
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缅因湾浮游动物群落的年代际变化对鱼类补充的潜在影响
DOI：
10.1016/j.icesjms.2005.04.025
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发表时间：
2005
影响因子：
3.3
通讯作者：
B. Bailey
中科院分区：
文献类型：
--
作者：
A. Pershing;C. Greene;J. Jossi;L. O’Brien;J. Brodziak;B. Bailey
我们使用主成分分析(PCA)来探索NOAA的连续浮游生物记录器(CPR)调查中持续40多年的浮游动物丰度时间序列的年际变化。这项分析确定了一个分类群的复合体，包括CentroPages Typicus、Oithon Asp.、Pseudocalanus spp.和Metridia Lucens，它们遵循一个共同的年代际变化模式，其特征是这些分类群在1990年左右急剧增加，然后在2002年迅速下降。在20世纪80年代至90年代之间，所有这些分类群的冬季丰度都有很大比例的增加。这些变化可能是由西北大西洋大陆架大规模清新导致的冬季初级生产力增加所推动的。除了“群落转移”模式外，分析还发现了一种很强的年际变化模式，这种模式归因于先前所描述的晚期哲水蚤丰度的变化。为了探索这些模式对较高营养水平的影响，我们将浮游动物模式与缅因湾地区12个鱼类种群的补充时间序列进行了关联。发现了几个显著的相关性，表明浮游动物模式的变化可能反映了缅因湾生态系统的广泛变化。
We used principal component analysis (PCA) to explore interannual changes in a time-series lasting more than 40 years of zooplankton abundance from NOAA's Continuous Plankton Recorder (CPR) survey. This analysis identified a complex of taxa, includingCentropages typicus,Oithonaspp.,Pseudocalanusspp., andMetridia lucensthat followed a common pattern of interdecadal variability characterized by a dramatic increase in these taxa around 1990, followed by a rapid decline in 2002. All of these taxa showed a large proportional increase in winter abundance between the 1980s and 1990s. These changes could be driven by increased primary productivity during winter, caused by a large-scale freshening of the Northwest Atlantic Shelf. In addition to the “community shift” mode, the analysis found a strong mode of interannual variability attributed to previously described changes in the abundance of late-stageCalanus finmarchicus. To explore the impact of these modes on higher trophic levels, we correlated the zooplankton modes with recruitment time-series from 12 fish stocks from the Gulf of Maine region. Several significant correlations were found, suggesting that the changes in the zooplankton modes may reflect broad changes in the Gulf of Maine ecosystem.