北太平洋における微小動物プランクトンの捕食関数の定量化と3次元海洋モデルでの応用

我们采用了不同的方法，包括数据收集和综合、现场实验和动态模型开发，以探讨在浮游生物模型中哪种类型的功能反应最适合描述微型浮游动物的捕食行为。首先，通过汇编稀释实验的汇集全球数据集，并辅之以我们自己的实验，我们展示了明确展示海洋微型浮游动物的正确功能反应类型的难度。其次，利用蒙特卡罗方法对嵌入一维模型的三种不同浮游生物生态系统模型进行了参数优化，结果表明，与类型1和类型2相比，Holling类型3是最优选择，但参数不可辨识性问题随着参数个数的增加而变得严重。第三，我们将Holling 3型功能响应应用于北太平洋连续的基于尺寸的模式和3D ROMS模式，该模式与观测结果(包括硝酸盐、叶绿素、初级生产力和分级叶绿素)显示出很好的一致性。这种浮游生物生态系统模型具有几个独特的特征，包括铁限制、浮游植物适应和动态大小结构。

We applied different approaches including data collection and synthesis, in situ experiments, and dynamic model development to investigate what type of functional response is the most appropriate for describing microzooplankton grazing in plankton models. First, by compiling a pooled global dataset of dilution experiments, complemented by our own experiments, we demonstrated the difficulty of unequivocally demonstrating the right type of functional response for marine microzooplankton. Second, using Monte-Carlo parameter optimization techniques for three different plankton ecosystem models embedded within a 1D model, we found that Holling type 3 is the best option compared with type 1 and 2, although the problem of parameter unidentifiability becomes severe as the number of parameters increases. Third, we have applied the Holling type 3 functional response within a continuous size-based model coupled with a 3D ROMS model in the North Pacific, which shows good agreement with the observations including nitrate, chlorophyll, primary production, and size-fractionated chlorophyll. This plankton ecosystem model has several unique features including iron limitation, phytoplankton acclimation, and dynamic size structure.