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

北太平洋微型浮游动物捕食功能的量化及其在 3D 海洋模型中的应用

• 批准号: 16K21701
• 负责人: Chen Bingzhang
• 金额: $ 2.58万
• 依托单位: Japan Agency for Marine-Earth Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2016
• 资助国家: 日本
• 起止时间: 2016-04-01 至 2018-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16K21701/
• 关键词: Functional response; Marine phytoplankton; Microzooplankton; Dilution experiment; Ecosystem modeling; Parameter optimization; Regional Ocean Model; Dilution technique; Plankton modeling; North Pacific

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.

我们采用了不同的方法，包括数据收集和合成，原位实验，动态模型的开发，以调查什么类型的功能响应是最适合描述微型浮游动物的浮游生物模型中的放牧。首先，通过汇编一个汇集的全球稀释实验数据集，并辅以我们自己的实验，我们证明了明确证明海洋微型浮游动物功能反应的正确类型的困难。 其次，使用蒙特-卡罗参数优化技术嵌入在一个一维模型中的三个不同的浮游生物生态系统模型，我们发现，Holling类型3是最好的选择相比，类型1和2，虽然参数不可识别的问题变得严重的参数的数量增加。第三，我们已经应用了Holling类型3功能响应在一个连续的基于尺寸的模型，再加上一个三维ROMS模型在北太平洋，这表明良好的协议与观测，包括硝酸盐，叶绿素，初级生产，和尺寸分级叶绿素。该浮游生物生态系统模型具有铁限制、浮游植物适应和动态大小结构等特点。

项目成果

Modeling the effect of phytoplankton size diversity on productivity in the ocean using the 'adaptive dynamics' approach

使用“自适应动力学”方法模拟浮游植物大小多样性对海洋生产力的影响

• 发表时间: 2018
• 作者: Chen Bingzhang;Smith Sherwood Lan
• 通讯作者: Smith Sherwood Lan

Estimating microzooplankton grazing functions from dilution experiments in the ocean

通过海洋稀释实验估计微型浮游动物的放牧功能

• 发表时间: 2016
• 作者: CHEN BINGZHANG ;Laws Edward A.
• 通讯作者: Laws Edward A.

Incorporating optimality into plankton modeling

将最优性纳入浮游生物建模中

• 发表时间: 2017
• 作者: Chen Bingzhang;Smith Sherwood Lan
• 通讯作者: Smith Sherwood Lan

Why primary production peaks at surface during summer in the oligotrophic open ocean?

为什么贫营养公海的初级生产力在夏季在表面达到峰值？

• 发表时间: 2017
• 作者: Chen Bingzhang;Smith Sherwood Lan;Chen Bingzhang
• 通讯作者: Chen Bingzhang

Why primary production peaks at surface during summer in the oligotrophic open ocean

为什么贫营养公海的初级生产力在夏季在表面达到峰值

• 发表时间: 2017
• 作者: Chen Bingzhang;Smith Sherwood Lan
• 通讯作者: Smith Sherwood Lan