Degradation mechanism on coastal ecosystems in shallow water as open multi-coupling systems and their conservation strategy

开放多重耦合系统浅水沿岸生态系统退化机制及其保护策略

基本信息

批准号：
17206052
负责人：
NADAOKA Kazuo
金额：
$ 31.2万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

1) Conducting field surveys in the fringing reef of the east coast of Ishigaki Island, we found characteristic features of advective diffusion process of red-silt and spatio-temporal variations of nutrients and phytoplankton. 2) Based on the results of field surveys and numerical simulations for the Shiraho reef of Ishigaki Island, we found the formation mechanism of coral slicks around the reef, and the release timing and density distributions in the water column of blue coral (Heliopora coerulea) larvae and their dependence on the tidal phase. 3) We developed a numerical 3-D current model incorporated with a coral canopy layer model and thereby found that the coral larvae may retain longer in the reef when released around neap tide. 4) We conducted long-term continuous measurements of terrestrial environmental loads from the Todoroki watershed adjacent to the above mentioned reef and developed a basic model for evaluating the land-based environmental discharge. 5) Developing microsat … More ellite markers and conducting genetic population analyses of crown-of-thorns starfish specimens taken from 23 sites in the Indo-Pacific regions including the Ryukyu Islands, we found that the gene flows are strongly governed by the magnitude of the ocean currents in the area concerned. With the numerical simulations of larval dispersal around the Kuroshio area, we reproduced the asymmetrical dispersal process along the area covering the Philippines, the Ryukyu Islands, Kyushu, Shikoku and Kii Peninsula, and clarified also with genetic population analyses that the Kuroshio may induce the secondary outbreaks. 6) We have indicated that coral cores may provide environmental fluctuation information over the past thousands years with the time resolution of 100 years, mangrove clay cores may provide information over the past 100 years with several years resolution, and coral annual rings may provide information of environments and terrestrial runoff in the past 100 years with 1 month resolution. Less

1）在Ishigaki岛东海岸的边缘礁进行现场调查时，我们发现了养分和浮游植物的红距和时空变化的高级差异过程的特征。 2）基于Ishigaki岛Shiraho礁的现场监测和数值模拟的结果，我们发现了珊瑚礁周围的珊瑚切片的形成机制，以及在蓝色珊瑚的水柱中的释放时间和密度分布（Heliopora 3）中的水柱（Heliopora 3）我们开发了一个数字模型，该模型与corail模型相结合时，该模型围绕着Coral Cansopy Cansopy Cansopy Cansopy模型，该模型围绕着Coral Cansopy模型， nea潮。 4）我们对从上述礁石附近的Todoroki流域进行了长期连续测量，对陆地环境负荷进行了长期测量，并开发了一种基本模型来评估陆基环境排放。 5）开发微面...更多的椭圆形标记和进行thorns冠状星鱼标本的遗传种群分析，从包括ryukyu群岛在内的印度太平洋地区的23个地点取走，我们发现该基因流由有关该地区的海洋货币的幅度强烈控制。随着黑发区域周围幼虫分散的数值模拟，我们在涵盖菲律宾，鲁岛群岛，九州，shikoku和kii peninsula的该地区的不对称扩散过程中，并通过遗传分析可能引起次要爆发。 6）我们已经指出，在过去的数千年中，岩心岩心可以通过100年的时间分辨率提供环境波动信息，红树林粘土核心可以在过去100年中提供信息，并分辨率为几年，并且在过去100年中可以提供1个月分辨率的环境和地面径流的信息。较少的