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Interannual variability of phyto-bacterioplankton biomass and production in coastal and offshore waters of the Baltic Sea

机译:波罗的海沿岸和近海水域浮游细菌生物量和产量的年际变化

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摘要

The microbial part of the pelagic food web is seldom characterized in models despite its major contribution to biogeochemical cycles. In the Baltic Sea, spatial and temporal high frequency sampling over three years revealed changes in heterotrophic bacteria and phytoplankton coupling (biomass and production) related to hydrographic properties of the ecosystem. Phyto- and bacterioplankton were bottom-up driven in both coastal and offshore areas. Cold winter temperature was essential for phytoplankton to conform to the successional sequence in temperate waters. In terms of annual carbon production, the loss of the spring bloom (diatoms and dinoflagellates) after mild winters tended not to be compensated for by other taxa, not even summer cyanobacteria. These results improve our ability to project Baltic Sea ecosystem response to short- and long-term environmental changes.Electronic supplementary materialThe online version of this article (doi:10.1007/s13280-015-0662-8) contains supplementary material, which is available to authorized users.
机译:尽管远洋食物网对生物地球化学循环有重大贡献,但很少在模型中进行特征描述。在波罗的海,三年来的时空高频采样显示,异养细菌和浮游植物耦合(生物量和产量)的变化与生态系统的水文特征有关。在沿海和近海地区,浮游植物和浮游细菌是自下而上驱动的。寒冷的冬季温度对于浮游植物在温带水域中要符合演替序列至关重要。在年度碳产量方面,冬季温和后春季开花(硅藻和鞭毛鞭毛虫)的损失往往无法通过其他类群来补偿,甚至夏天的蓝细菌也无法弥补。这些结果提高了我们预测波罗的海生态系统对短期和长期环境变化的反应的能力。电子补充材料本文的在线版本(doi:10.1007 / s13280-015-0662-8)包含补充材料,可用于授权用户。

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