Meroplanktonic distribution and circulation in a coastal retention zone of the northern California upwelling system
Meroplanktonic distribution and circulation in a coastal retention zone of the northern California upwelling system
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北加州上升流系统沿海滞留区的浮游生物分布和环流
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Largier
中科院分区：
文献类型：
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作者：
S. Wing;L. Botsford;Stephen V. Ralston;J. Largier
123°00′W）主要发生在上升流的松弛期间，当时温暖的海水从法拉隆湾向极地流动。在1994年和1995年期间，我们采样的浮游幼虫分布和水文南部和北部的点雷耶斯在上升流测试是否高浓度的螃蟹和岩鱼幼虫集中在源的放松流南部的点雷耶斯。雷耶斯角外的上升流羽流和“上升流阴影”（由北方海湾较温暖、含盐量较低的海水表示）在这两年都很明显，锋面区域也很明显，标志着三种不同类型的水之间的边界：（1）新上升流，（2）海洋，（3）旧金山弗朗西斯科湾外流。此外，还有第四种类型，称为海湾水，是这三种类型的混合物。幼虫的cancrid，pinnotherid，和“沿海”螃蟹和岩鱼的浓度高南部的雷耶斯点，但低或没有在新涌上来的水点以北。在上升流阴影内，这些部分浮游生物分类群与不同的水团有关。几种潮间带蟹类和早期巨蟹集中在旧金山弗朗西斯科湾流出水，沿海海湾水晚期巨蟹，早期和晚期pinnotherid蟹，和岩鱼集中在新涌和海湾水之间的锋面区域。在所研究的分类群中，只有岩鱼在近海的海水中被发现。观察到的高浓度的meroplankton表明，Farallones湾是一个重要的保留区的幼虫，解决到沿海人口在海湾和北部通过极地运输在上升流放松。
123°00′W) occurs primarily during relaxation from upwelling, when warm water flows poleward from the Gulf of the Farallones. During 1994 and 1995 we sampled planktonic larval distributions and hydrography both south and north of Point Reyes during upwelling to test whether high concentrations of crab and rockfish larvae were concentrated in the source of the relaxation flow to the south of Point Reyes. An upwelling plume off Point Reyes and an “upwelling shadow,” indicated by warmer, less saline water in the northern Gulf, were evident in both years, as were frontal regions that marked the boundaries between water types of three different types: (1) newly upwelled, (2) oceanic, and (3) San Francisco Bay outflow. In addition, there was a fourth type, termed Gulf water, that was a mixture of these three types. Concentrations of larvae of cancrid, pinnotherid, and “coastal” crabs and rockfishes were high south of Point Reyes but were low or absent in the newly upwelled water north of the point. Within the upwelling shadow, these meroplankton taxa were associated with different water masses. Several intertidal crab species and early‐stage cancrid crabs were concentrated in San Francisco Bay outflow water, and coastal Gulf water late‐stage cancrid crabs, early‐ and late‐stage pinnotherid crabs, and rockfishes were concentrated at the frontal region between newly upwelled and Gulf water. Of the taxa examined, only rockfishes were found offshore in oceanic water. The high concentrations of meroplankton observed suggest that the Gulf of the Farallones is an important retention area for larvae that settle into coastal populations in the Gulf and to the north via poleward transport during upwelling relaxation.