Abstract Larval and early juvenile fishes were sampled from the eastern Bering Sea (EBS) shelf from 2001 to 2005, and in 2007. Data from these collections were used to examine spatial and temporal patterns in species assemblage structure and abundance. The years 2001–2005 were unusual because the EBS water temperature was ‘warm’ compared with the long‐term mean temperature. In contrast, 2007 was a ‘cold’ year. The abundance of the five most numerous taxa at 12 stations common to all years sampled (1996–2005, 2007) were significantly different among years. Larval and early juvenile stage Theragra chalcogramma (walleye pollock), a commercially important gadid, were by far the most abundant fish in all years. Bottom depth alone best explained assemblage structure in most years, but in others, bottom depth and water column temperature combined and percent sea‐ice coverage were most important. Abundance of T. chalcogramma larvae increases with water column temperature until 5°C and then becomes level. Higher abundances of Gadus macrocephalus (Pacific cod) larvae occur in years with the greatest percent sea‐ice cover as indicated by GAM analysis. Larvae of Lepidopsetta polyxystra (northern rock sole) increase in abundance with increasing maximum wind speed, but decrease at a later date during the last winter storm. The data are consistent with the hypothesis that oceanographic conditions, specifically water temperature and sea‐ice coverage, affect the spatial and temporal pattern of larval abundances. In general, ichthyoplankton species assemblages can be important early indicators of environmental change in the Bering Sea and potentially other subarctic seas as well.

中文翻译：

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1996-2007年白令海东部陆架夏季浮游鱼类群落的时空格局

摘要 2001 年至 2005 年和 2007 年，从白令海东部 (EBS) 陆架对幼鱼和早期幼鱼进行了采样。这些收集的数据用于检查物种组合结构和丰度的时空模式。2001-2005 年是不寻常的，因为与长期平均温度相比，EBS 水温“温暖”。相比之下，2007年是“寒冷”的一年。在所有采样年份（1996-2005、2007 年）共有的 12 个站点中，数量最多的五个分类群的丰度在年份之间存在显着差异。幼体和幼鱼早期 Theragra chalcogramma（大眼鳕）是一种重要的商业鱼类，是所有年份中数量最多的鱼类。在大多数年份，仅底部深度就可以最好地解释组合结构，但在其他年份，底部深度和水体温度相结合以及海冰覆盖百分比是最重要的。T. chalcogramma 幼虫的丰度随着水柱温度的增加而增加，直到 5°C，然后变成水平。GAM 分析表明，在海冰覆盖百分比最大的年份，Gadus macrocephalus（太平洋鳕鱼）幼虫的丰度更高。Lepidopsetta polyxystra（北岩底）的幼虫随着最大风速的增加而大量增加，但在最后一次冬季风暴期间会减少。这些数据与海洋条件，特别是水温和海冰覆盖率影响幼虫丰度的时空格局的假设一致。一般来说，