著者

畠瀬 頼子 小栗 ひとみ 松江 正彦

出版者

公益社団法人 日本造園学会

雑誌

ランドスケープ研究 (ISSN:13408984)

巻号頁・発行日

vol.73, no.5, pp.421-426, 2010 (Released:2011-07-22)

参考文献数

17

被引用文献数

5 1

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We aimed to investigate the control effect of season and time of mowing on Coreopsis lanceolata. To this end, we conducted a 2-year mowing experiment on the vegetation of gravely beds of Kiso River. Mowing was conducted either once, twice, or thrice a year, in June, October, and/or February, since 2007. We observed that the number of flowering shoots decreased in the plot mowed in February (once) ; in plots mowed in June and February and in October and February (twice) ; and in plots mowed in June, October, and February (thrice). In addition, overall, mowing had no effect of reducing the number of individuals, but the number decreased in plots selectively-removed only in June. This experiment shows that mowing in February is effective in decreasing the flowering of Coreopsis lanceolata, and mowing more than once (in February and another season) enhances this effectiveness. Moreover, in this 2-year experiment, we found that mowing does not decrease the number of individuals of Coreopsis lanceolata.

著者

畠瀬 頼子 小栗 ひとみ 藤原 宣夫 宇津木 栄津子 戸井 可名子 井本 郁子 松江 正彦

出版者

公益社団法人 日本造園学会

雑誌

ランドスケープ研究 (ISSN:13408984)

巻号頁・発行日

vol.72, no.5, pp.537-542, 2009 (Released:2010-06-24)

参考文献数

20

被引用文献数

4 3 1

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We conducted a survey on vegetation change and performed a germination test for the topsoil seed bank after vegetation management of the herbaceous community dominated by the invasive alien species Coreopsis lanceolata on the riverbed of the Kiso River. We observed that although a large number of C. lanceolata seedlings were established, few flowering shoots emerged in the year following vegetation management (removal). The extended summed dominance ratio of C. lanceolata decreased, while that of Potentilla chinensis and Galium verum-domestic species growing on the gravelly riverbed-increased. However, the number of alien species of annual and biennial plants markedly increased after the removal. The germination test showed that this increase was caused by germination and establishment from the seed bank in the disturbed area after the removal. The test also showed that the seed supply of Artemisia capillaris and Dianthus superbus var. longicalycinus-domestic species growing on the gravelly riverbed and, in small numbers, in the surveyed and surrounding areas-was low. In this study, the removal proved effective in controlling the flowering of C. lanceolata; however, the problem of increase in the number of alien species of annual and biennial plants remains to be resolved.

著者

畠瀬 頼子 小栗 ひとみ 松江 正彦

出版者

Japanese Institute of Landscape Architecture

雑誌

ランドスケープ研究 (ISSN:13408984)

巻号頁・発行日

vol.71, no.5, pp.553-556, 2008

被引用文献数

2 6

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In Japan, Coreopsis lanceolata has been invading riverbed vegetation and is designated as an invasive alien species. A study regarding its occurrence and the vegetation transition in the riverbed of Kiso River was conducted. Comparing the vegetation maps of 1979, 1996 and 2006 revealed that over time, the area of the wet grassland had decreased. However, the forest area and bamboo/dwarf bamboo community had increased. Contrastingly, the area of the dry grassland tends to change little and is sustained. C. lanceolata occurred in 70% of the area of the dry grassland and 50% of the area of shrubs in 2006. C. lanceolata occurred frequently in the Artemisia capillaris-Anaphalis margaritacea subsp. yedoensis community and Zoysia japonica-Potentilla chinensis community in 2006. This study reports regarding some types of the dry grassland including the communities with the specific native plants that was sustained for a long time and is invaded easily by C. lanceolata.

著者

畠瀬 頼子

出版者

日本緑化工学会

雑誌

日本緑化工学会誌 (ISSN:09167439)

巻号頁・発行日

vol.34, no.3, 2009-02-28

参考文献数

9

著者

畠瀬 頼子 小栗 ひとみ 松江 正彦

出版者

公益社団法人 日本造園学会

雑誌

ランドスケープ研究 (ISSN:13408984)

巻号頁・発行日

vol.71, no.5, pp.553-556, 2008-03-31 (Released:2009-05-08)

参考文献数

18

被引用文献数

7 6

---

In Japan, Coreopsis lanceolata has been invading riverbed vegetation and is designated as an invasive alien species. A study regarding its occurrence and the vegetation transition in the riverbed of Kiso River was conducted. Comparing the vegetation maps of 1979, 1996 and 2006 revealed that over time, the area of the wet grassland had decreased. However, the forest area and bamboo/dwarf bamboo community had increased. Contrastingly, the area of the dry grassland tends to change little and is sustained. C. lanceolata occurred in 70% of the area of the dry grassland and 50% of the area of shrubs in 2006. C. lanceolata occurred frequently in the Artemisia capillaris-Anaphalis margaritacea subsp. yedoensis community and Zoysia japonica-Potentilla chinensis community in 2006. This study reports regarding some types of the dry grassland including the communities with the specific native plants that was sustained for a long time and is invaded easily by C. lanceolata.