ファン・小山・盛・内田・紙本・中原-坪田・坪田 2023
ファンほか（2023）
- ファン=クイン=チ・小山克輝・盛 沢鵬・内田慎治・紙本由佳理・中原-坪田美保・坪田博美. 2023. 広島県廿日市市宮島ドンドン川砂防堰堤予定地の維管束植物フロラ. 厳島研究 19: (1)-(15). [Phan, Q. C., Koyama, Y., Sheng, Z.-P., Uchida, S., Kamimoto, Y., Nakahara-Tsubota, M. & Tsubota, H. 2023. Vascular plant flora of the area surrounding the Dondon-gawa River on Miyajima Island, Hiroshima Prefecture, SW Japan, before the proposed construction of an erosion-control dam. Studies of the Itsukushima Island 19: (1)–(15).]
Abstract
Phan, Q. C., Koyama, Y., Sheng, Z.-P., Uchida, S., Kamimoto, Y., Nakahara-Tsubota, M. & Tsubota, H. 2023. Vascular plant flora of the area surrounding the Dondon-gawa River on Miyajima Island, Hiroshima Prefecture, SW Japan, before the proposed construction of an erosion-control dam. Studies of the Itsukushima Island 19: (1)–(15).
Miyajima (Itsukushima) Island, Hatsukaichi City, Hiroshima Prefecture, is a protected area that serves as the core and buffer zones of Itsukushima Shrine, a World Heritage Site. The Dondon-gawa River on Miyajima Island has its upper stream located on a mountain slope and flows through the town area. A dam is planned to be built on the river to prevent erosion. Since the construction of the dam will involve removing forest and will also affect the plants on the forest floor, we investigated vascular plants to evaluate the species composition and distribution in the planned dam construction area. We confirmed the presence of 124 species (1 lycopod, 12 ferns, 102 angiosperms, and 9 gymnosperms; including both native and naturalized species). Some specimens were unidentifiable by morphology because of dwarfing and unconfirmed flowering due to deer browsing and therefore required DNA barcoding for identification. We also found in the forest bed some rare species listed in the Red List of Hiroshima Prefecture. Consideration should be given to the dam's location for the conservation of these species, together with an assessment of the environmental impact of the dam's placement.
Keywords
- conservation, erosion-control dam, flora, alien species, rare species, biodiversity