Some new seeding methods of seaweed and the basic of how to use for reforestation
2015
Nakajima, Y. (Ecosystem Research Center of Coastal Area Co., Ltd., Koto-ku, Tokyo (Japan))
Lack of seed of seaweeds is considered to be one of the significant factors that continue barren ground called Isoyake in Japan. 'Spore bag method' using a net bag filled with mature seaweed was most commonly-used method of seeding. As the freshness of seaweed was faded soon, so the duration of seeding became shorter. Then a seeding method called 'Submerged mid-layer nets' was thought up. The new method intended to extend the freshness of seaweed has developed into 'Open spore bag method' widely-used for seaweed restoration in various regions in Japan. In this paper, three seeding methods designed in the same light are introduced. The first one is 'U-bolts method' for Sargassaceae growing on intertidal zine. The second one is 'Plastic net method' for Lessoniaceae growing on upper sublittoral zone. The last one is 'Small net method' for both species above-mentioned growing on sublittoral calm zone. The habitats of seaweed are mainly determined by the condition of light and wave action. Therefore, the basic of seeding is transplanting the seaweed to a similar environment inhabiting before.
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