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Development of evaluation tools for countermeasure technologies harnessing marine ecosystem

开发利用海洋生态系统的对策技术评价工具

基本信息

批准号：
18560764
负责人：
TABETA Shigeru
金额：
$ 2.49万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560764/
关键词：
marine ecosystem model carbon budget artificial upwelling semi-refractory organic matters C N ratio food economy model food self-sufficiency rate

项目摘要

A coupled physical-biological model was developed to simulate the nitrogen and carbon cycles to evaluate the technologies harnessing marine ecosystems. The model is focusing on the degradation of particulate organic matter (POM), because the process should much affects on the efficiency of the biological pump which transport carbon from the surface to the deep layer. The employed ecosystem model is based on KKYS which is one of the most popular nitrogen cycle model, but some new compartments such as Bacteria (BAC), Semi-Refractory POM (SR-POM) and dissolved inorganic carbon (DIC) are also considered. The model is tuned by the laboratory experimental data in which the seawater sampled at the target site was used. The performance of the developed model is compared to that of the original KKYS to discuss the availability of the model. Then, the model is applied to simulate the ecosystem behaviour in the target area where the artificial upwelling generator is installed. The long-term carbon budget is also estimated by vertical one-dimensional ecosystem model using the parameters determined from the results of the three-dimensional model. It is clarified that CO2 budget gradually changes because the vertical profile of C/N ratio is affected due to the decomposition of refractory organic matters.A food economic model including fishery products is also developed by expanding IFPSIM which was originally made for analyzing agricultural economic polices. Fishery products are introduced by categorizing fish species according to patterns of supply and demand, modeling production and demand for typical fish species, and then extending the model to all fishery products. In simulations using the developed model, it is demonstrated that self-sufficiency in fishery products, which do not rely on feed grain, would make a substantial contribution to overall self-sufficiency in sources of essential animal protein.

开发了一个物理-生物耦合模型来模拟氮和碳循环，以评估利用海洋生态系统的技术。该模型将重点放在颗粒有机物(POM)的降解上，因为这一过程将对生物泵的效率产生很大影响，生物泵将碳从表层输送到深层。所采用的生态系统模型是基于最流行的氮循环模型之一的KKYS模型，但也考虑了细菌(BAC)、半难降解POM(SR-POM)和溶解无机碳(DIC)等新的分区。模型由实验室实验数据进行修正，实验数据取自目标点的海水。将改进后的模型与原KKYS模型的性能进行了比较，讨论了该模型的有效性。然后，应用该模型对安装人工上升流发生器的目标区的生态系统行为进行了模拟。利用三维生态系统模型的结果确定的参数，利用垂直一维生态系统模型估算了长期碳收支。通过对原来用于分析农业经济政策的IFPSIM模型进行扩展，建立了一个包含渔业产品的粮食经济模型。介绍渔业产品的方法是根据供需模式对鱼类品种进行分类，对典型鱼类品种的生产和需求进行建模，然后将该模型扩展到所有渔业产品。在使用开发的模型的模拟中，证明了不依赖饲料谷物的渔业产品的自给自足将对基本动物蛋白来源的总体自给自足做出重大贡献。