諫早湾潮受け堤防締め切り(1997 年 4 月 14 日)後の提内の干陸地に生育する夏の種子植物相(予報)

概要

論文の詳細を見る
Many studies had been done about the distribution of halophytes (Tsuda 1947,Hatanaka 1956,Kuranari and Iwamura 1976,1977,Iwamura 1987,Nakanishi 1989,Ejima et al. 1990,Takahashi et al. 1991). However, there have been a few study as to weeds invaded into the dried land after the reclamation (Kobayashi 1952,Jinno and Ida, 1988). Now, 3,550 ha of a inner part of Isahaya Bay was closed for the reclamation in April 14,1997. Since water level is kept at -1 m of sea level standardized at Tokyo Bay, a broad dried land was emerged. As a desalinization was progressed, many spermatophytic plants (glycophytes), so called weeds invaded into the dried land. 14 study sites were set on the dreid land inside the bank, and investigations based on the relation between the flora and soil properties were done from July to August in 1977. Soil salinity was storongly desalinized at the mouth area of river, since soils of habitats was gravelly sand. Clayey soils were also considerably desalinized at sites where fresh water was lifted from a back creek by a lift pump. Then, many weeds grew on such sites. On the other hands, the desalinization of clayey soils near the bank already constructed, where the lift pump was not set, was progressing more slowly. Therefore, since the soil salinity was still considerably high, weeds did not grow except for halophytes, such as Suaeda japonica. Moreover, plants did not grow on reduced soils. 108 plant species including some halophytes were found. Plant species of high emergence rate were Sonchus oleraceus, Eclipata prostrata and Rumex japonicus etc. among plants investigated. Halophytes, especially those of the seashore did not spread so much on dried lands. Hereafter, I would like to study the succession of spermatophytes on dried land insidethe bank.
1998-03-25

著者

陣野信孝
長崎大学教育学部

諫早湾潮受け堤防締め切り(1997 年 4 月 14 日)後の提内の干陸地に生育する夏の種子植物相(予報)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク