首页> 外文期刊>海洋理工学会誌 >鉄を利用した藻場再生技術導入に関わる沿岸域の環境評価手法に関する研究
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鉄を利用した藻場再生技術導入に関わる沿岸域の環境評価手法に関する研究

机译:引入铁质海藻床再生技术的沿海环境评价方法研究

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摘要

Barren grounds in coastal area are serious problems in Japan and throughout the world. Although several reasons were proposed to account for barren grounds, the shortage of dissolved iron has been especially focused in recent years. Supplying steelmaking slag and humus materials, such as compost, was proposed for restoring seaweed beds. Iron concentration in seawater could be increased if a mixture of slag and compost were supplied, since complexes, iron-humates, were produced from iron in slag and humic substances in compost. The field experiment was attempted on the side of Sea of Japan in Hokkaido and the restoration of seaweed bed from barren ground could be confirmed. This method contributes not only to restoration of coastal environment, but also to the efficient use of by-products and unutilized biomass. However, dependence of seaweed beds on water environment of coastal sea, such as dissolved iron concentration, should be understood more precisely so that this method is installed without negative impact on coastal ecosystem. In this study, two topics were investigated for understanding relationship between dissolved iron concentration and the growth of seaweed beds. The first was to evaluate the linkage between forest, river and sea based on iron. The dissolved iron concentration in seawater and river water, and the amount of humic substances and iron in soil were investigated in Okushiri Island, Hokkaido. The second was to develop a model of the seaweed growth in coastal ecosystem for evaluating the main possible factor that reduces seaweed beds. The importance of dissolved iron in seawater for the growth of seaweeds was found with this model. The model is useful for understanding the conditions of coastal environment and for deciding an appropriate method for restoration of seaweed beds from barren grounds.%浅海岩礁域の海藻群落が衰退・消失する磯焼け(Fujita,2002)が日本や世界各地で深刻な問題となっているが,その発生要因としては,海水温上昇,ウニヤアイゴ・ブダイなどの植食動物によるに食害など様々な要因が挙げられている.
机译:在日本乃至全世界,沿海地区的贫瘠土地都是严重的问题。尽管提出了几个理由来解释贫瘠的土地,但近年来铁的短缺特别受到关注。建议提供炼钢炉渣和腐殖质材料,例如堆肥,以恢复海藻床。如果提供矿渣和堆肥的混合物,可以提高海水中的铁浓度,因为从矿渣中的铁和堆肥中的腐殖质产生复合物铁腐殖酸盐。在北海道的日本海一侧进行了野外试验,可以确认从贫瘠的土地中恢复海藻床。这种方法不仅有助于恢复沿海环境,而且有助于有效利用副产物和未利用的生物量。但是,应更准确地了解海藻床对沿海海域水环境的依赖性,例如溶解铁的浓度,以便安装该方法时不会对沿海生态系统产生负面影响。在这项研究中,研究了两个主题以了解溶解铁浓度与海藻床生长之间的关系。首先是评估基于铁的森林,河流和海洋之间的联系。在北海道奥ushi里岛调查了海水和河水中的溶解铁浓度以及土壤中的腐殖质和铁含量。第二个是开发沿海生态系统中海藻生长的模型,以评估减少海藻床的主要可能因素。通过该模型发现了海水中溶解的铁对于海藻生长的重要性。该模型对于理解沿海环境条件以及确定从贫瘠的土地中恢复海藻床的合适方法非常有用。%浅海岩礁域の海藻聚集が衰退・消失する矶焼け(Fujita,2002)が日本や世界各地で深刻な问题となっているが,その発生要因としては,海水温上升,ウニヤアイゴ・ブダイなどの植食动物によるに食害など様々な要因が挙げられている。

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  • 来源
    《海洋理工学会誌》 |2011年第1期|p.13-20|共8页
  • 作者

    山本光夫;

  • 作者单位

    東京大学教養学部;

    〒153-8902 東京都目黒区駒場3-8-1;

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  • 正文语种 jpn
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