The Relationship between Substrate Crevasse and the Seaweed Bed Formation in Wakasa Bay, Sea of Japan

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  • 若狭湾における基質空隙と藻場形成との関係について
  • ワカサワン ニ オケル キシツ クウゲキ ト モバ ケイセイ ト ノ カンケイ ニ ツイテ

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Abstract

Seaweed beds have recently declined and changed into barren ground in some Japanese coastal areas. On the other hand, the seaweed beds are important for production of fishery resources and conservation of marine environment. Experimental study to form a seaweed bed by preventing invading herbivores was arranged at the western part of Wakasa Bay, Sea of Japan. By using a net over the artificial constructions where Sargassum patens had not previously grown, young S. patens were able to survive. The effect of the covering net on the substrate crevasses where some herbivores may inhabit. To form a submarine forest effectively in this area. it was suggested that it is necessary to prevent herbivores from hiding in the substrate crevasses as habitats.

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