Journal of the Graduate School of Biosphere Science, Hiroshima University Volume 49
2010-12-24 発行

広島湾奥部の海底におけるアオサ等海藻類の堆積状況(予報)

Accumulation of Ulva spp. (Chlorophyta) and other seaweed thalli on the shallow sea bottom of Hiroshima Bay (A preliminary survey)
Yoshida, Goro
Uchimura, Masayuki
Hiraoka, Masanori
Terawaki, Toshinobu
Arai, Shogo
file
abstract
Biomass of Ulva spp. (Chlorophyta) causing ‘green tide’ and other seaweeds accumulated on shallow sea bottom in inner area of Hiroshima Bay was estimated by trawl-net and SCUBA surveys. Thirty-eight species of seaweed and seagrass was sampled, but Ulva spp. was dominant occupying 64-100 % in biomass of all samples. Ulva spp. was sampled most abundantly at the stations shallower than 5 m, and it was indicated that sea bottom with a gentle slope, and located offshore of sandy beaches or tidal-flats offers a suitable condition for Ulva growth.
subject
アオサ類
グリーンタイド
現存量
広島湾
小型底曳き網
biomass
green tide
Hiroshima Bay
trawl net
Ulva spp.