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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >The impact of environmental variability on Atlantic mackerel Scomber scombrus larval abundance to the west of the British Isles
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The impact of environmental variability on Atlantic mackerel Scomber scombrus larval abundance to the west of the British Isles

机译：环境变化对不列颠群岛西部大西洋鲭鱼Scomber scombrus幼虫的丰度的影响

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The value of the Continuous Plankton Recorder (CPR) fish larvae dataset, with its extensive spatiotemporal coverage, has been recently demonstrated with studies on long-term changes over decadal scales in the abundance and distribution of fish larvae in relation to physical and biological factors in the North Sea. We used a similar approach in the west and southwest area of the UK shelf and applied a principal component analysis (PCA) using 7 biotic and abiotic parameters, combined with Hierarchical Cluster Analysis (HCA), to investigate the impact of environmental changes in the west and southwest area of the UK shelf on mackerel larvae during the period 1960-2004. The analysis revealed 3 main periods of time (1960-1968; 1969-1994; 1995-2004) reflecting 3 different ecosystem states. The results suggest a transition from an ecosystem characterized by low temperature, high salinity, high abundances of zooplankton and the larger phytoplankton groups, to a system characterized by higher temperature, lower salinities, lower abundances of zooplankton and larger phytoplankton and higher abundances of the small phytoplankton species. Analysis revealed a very weak positive correlation between the Second principal component and mackerel larvae yearly abundance, attributed to the North Atlantic Oscillation (NAO). The results presented here are in broad accord with recent investigations that link climatic variability and dynamics of mackerel reproduction. However, the growing body of literature that documents statistical correlations between environment and mackerel needs to be supplemented by local process studies, to gain more insight and to be able to predict mackerel response to climate change scenarios. Utilising the strength of the CPR dataset, namely its unique temporal coverage, in an analysis where other data (such as egg surveys) are drawn in to compensate for the spatial issues could prove to be the way forward. Crown Copyright (C) 2015 Published by Elsevier Ltd.
机译：最近，通过对十年来规模的长期变化，研究了幼体的丰度和分布与鱼类的物理和生物因素有关的连续浮游生物记录器（CPR）鱼幼体数据集的价值。北海。我们在英国大陆架的西部和西南部地区使用了类似的方法，并应用了使用7种生物和非生物参数的主成分分析（PCA），并结合了层次聚类分析（HCA），以调查西部环境变化的影响1960-2004年期间，英国和西南地区的鲭鱼幼体上的架子。分析揭示了反映3个不同生态系统状态的3个主要时间段（1960-1968年; 1969-1994年; 1995-2004年）。结果表明，从以低温，高盐度，高浮游植物和较大的浮游植物群为特征的生态系统过渡到以高温，低盐度，浮游动物的较低丰度和较大的浮游植物以及较高的小浮游生物为特征的系统浮游植物种类。分析显示，由于北大西洋涛动（NAO），第二主成分与鲭鱼幼虫的年丰度之间存在非常弱的正相关。这里提出的结果与将气候变化性和鲭鱼繁殖动态联系起来的最新研究大体一致。然而，越来越多的文献报道了环境与鲭鱼之间的统计相关性，需要通过本地过程研究来补充，以获得更多的见识并能够预测鲭鱼对气候变化情景的反应。利用CPR数据集的优势，即其独特的时间覆盖范围，在分析中引入其他数据（例如鸡蛋调查）以补偿空间问题的分析可能被证明是前进的道路。 Crown版权所有（C）2015，由Elsevier Ltd.发布。

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