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Integrated study on the effect of environmental changes on the fisheries resources in Ariake Sound

环境变化对有明湾渔业资源影响的综合研究

基本信息

批准号：
13854006
负责人：
NAKATA Hideaki
金额：
$ 78.87万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13854006/
关键词：
Ariake Sound marine environment fisheries resources transparency red tide tidal flat ecosystem ocean color satellite image endocrine disruptor 堆積物スナモグリ類エイ類環境ホルモン推積物

项目摘要

Integrating all of the results of this research, we have concluded as follows ; (1)It was revealed from numerical simulation of tidal currents that rapid extention of reclamation areas during late 1960s had accelerated eutrophication and subsequent environmental degradation of Ariake Sound. In addition, recent increase in transparency, which was probably caused by decrease in suspended sediment due to weakened tidal currents, apparently resulted in increase in red-tide frequency. (2)Fish catches have rapidly declined in 1990s, particularly in the latter half of 1990s, which might be resulted from environmental degradation in the bottom water like enlarged DO deficiency areas. On the other hand, rapid increase in the abundance of rays enhanced predatory pressure for shellfishes and competition for food among bottom dwelling species as well. (3)From the stable isotope analysis, it was revealed that benthic animals including some shellfishes on the estuarine sand-flat mainly eat phytoplankton originating from seawater, and that contribution of attached diatoms is not always large. (4)Further, several new findings were obtained on the implication of vertical stratification enhanced during the neap tide for primary production, utility of satellite remote sensing in monitoring red-tide outbreaks and suspended mud, and contamination of tidal flat fishes by endocrine disruptors. (5)As seen from a viewpoint of material budget, material balance between benthic tidal flat systems and pelagic plankton systems was maintained during 1960s, while decline in the tidal flat systems and subsequent deterioration of the pelagic systems symbolized by harmful red-tide outbreaks became prominent, resulting in losing the material balance in the ecosystem. The above results were presented at relevant academic meetings and symposiums, part of which will contribute to establishing the international framework for future collaborative research with Korean institutes and others.

综合本研究的所有结果，我们得出以下结论：(1)潮流数值模拟结果表明，20世纪60年代后期围垦面积的迅速扩大加速了有明湾富营养化和环境退化。此外，近期透明度的增加明显导致赤潮频率的增加，这可能是由于潮流减弱导致悬浮泥沙减少所致。(2) 90年代尤其是90年代后半期渔获量急剧下降，这可能是由于DO缺乏区域扩大等底层水体环境恶化所致。另一方面，鳐鱼数量的迅速增加增加了贝类的捕食压力和海底生物之间的食物竞争。(3)稳定同位素分析表明，河口滩涂底栖动物（包括部分贝类）主要以来源于海水的浮游植物为食，附着硅藻的贡献并不大。(4)此外，在小潮期间垂直分层增强对初级生产的影响、卫星遥感监测赤潮暴发和悬浮泥的应用以及内分泌干扰物对潮平鱼的污染等方面获得了一些新的发现。(5)从物质收支角度看，60年代底栖潮滩系统与中上层浮游生物系统的物质平衡基本保持，但以有害红潮爆发为标志的潮滩系统衰退和随后的中上层系统恶化变得突出，导致生态系统物质平衡丧失。上述成果已在相关学术会议和研讨会上发表，其中一部分将有助于建立与韩国机构和其他机构未来合作研究的国际框架。

项目成果

期刊论文数量（144）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

有明海の赤潮リモートセンシング

有明海赤潮遥感

DOI：
发表时间：
2004
期刊：
計測と制御 43
影响因子：
0
作者：
I.Suzuki;Y.Kanesaki;K.Mikami;N.Murata;石坂丞二
通讯作者：
石坂丞二

諫早湾における赤潮原因プランクトンの最近の変化

谏早湾赤潮浮游生物近期变化

DOI：
发表时间：
2003
期刊：
月刊海洋 34
影响因子：
0
作者：
Hiroaki Adachi;Satoshi Murakami;Ai Niino;Hiroyoshi Matsumura;Kazufumi Takano;Tsuyoshi Inoue;Yusuke Mori;Akihito Yamaguchi;Takatomo Sasaki;松岡數充
通讯作者：
松岡數充

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