著者

吉田 司 芝 修一 小山 義明 新井 義昭 鈴木 輝明

出版者

日本水産工学会

雑誌

水産工学 (ISSN:09167617)

巻号頁・発行日

vol.40, no.3, pp.205-210, 2004-02-27

参考文献数

9

被引用文献数

2

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Seasonal changes of Zostera marina L and physical environment factors (underwater irradiance, Sandybottom quality etc.) were examined off Miya in the Mikawa Bay, Aichi Prefecture, from 2000 to 2001 Japan.Z. marina forming seagrass beds grew densely from February to June, and declined from July to October.While a large number of juveniles geiminated from their seed started to appear toward the middle ofOctober, and Z. marina grew densely again in the following spring. Most of the Z. marina off Miya was annual.Vertical distribution range of Z. marina beds were from D.L. +0.5m to -1.6m depth. From the site irradianceconditions in the seagrass bed, the deepest bottom of Z. marina possible growth was estimated to beD.L.-1.8m. The high temperature in the summer was the important cause that the Z. marina beds weredecreased. Surface layer of the bottom was reductive conditions enough to germinate. These observationssuggest that Z. marina of annual plant requires calm environmental conditions as one of the required suitableconditions for successful seagrass bed formation.