Spatio-temporal variation in the zooplankton prey of lesser sandeels: species and community trait patterns from the Continuous Plankton Recorder
Spatio-temporal variation in the zooplankton prey of lesser sandeels: species and community trait patterns from the Continuous Plankton Recorder
复制标题
小沙鳗浮游动物猎物的时空变化：来自连续浮游生物记录仪的物种和群落特征模式
DOI：
10.1093/icesjms/fsac101
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发表时间：
2022
影响因子：
3.3
通讯作者：
Nager, Ruedi G
中科院分区：
文献类型：
--
作者：
Olin, Agnes B;Banas, Neil S;Johns, David G;Heath, Michael R;Wright, Peter J;Nager, Ruedi G
浮游生物群落的物候、分布和大小组成正在迅速变化以应对气候变暖。这可能导致食饵性鱼类的猎物领域发生变化，而食饵性鱼类在向海洋食物链上游转移能量方面发挥着关键作用。在这里，我们使用60多年的连续浮游生物记录仪的数据，以探讨在北海，法罗群岛和冰岛南部的食饵性较小的沙（Ammodytes marinus）的猎物领域的关键类群和社区特征的时间趋势。我们发现在猎物场显着的空间变化，与Calanuscopepods一般是更常见的北方部分的研究区域。在北海西部，估计量的可用能量在猎物领域已经减少了50%以上，自20世纪60年代以来，这种减少是伴随着小桡足类的丰度下降，并在每年的猎物丰度峰值的时间转移。此外，估计的平均猎物社区的身体大小增加了几个考虑的位置。总体而言，我们的研究结果指出了区域研究的猎物领域的重要性，并提醒我们不要仅根据关键类群或平均群落特征的大规模趋势来推断生态后果。
The phenology, distribution, and size composition of plankton communities are changing rapidly in response to warming. This may lead to shifts in the prey fields of planktivorous fish, which play a key role in transferring energy up marine food chains. Here, we use 60 + years of Continuous Plankton Recorder data to explore temporal trends in key taxa and community traits in the prey field of planktivorous lesser sandeels (Ammodytes marinus) in the North Sea, the Faroes and southern Iceland. We found marked spatial variation in the prey field, withCalanuscopepods generally being much more common in the northern part of the study area. In the western North Sea, the estimated amount of available energy in the prey field has decreased by more than 50% since the 1960s. This decrease was accompanied by declining abundances of small copepods, and shifts in the timing of peak annual prey abundances. Further, the estimated average prey community body size has increased in several of the locations considered. Overall, our results point to the importance of regional studies of prey fields, and caution against inferring ecological consequences based only on large-scale trends in key taxa or mean community traits.