[pp.53-60]

Study on the Temporal Change of Coastal Vegetation and the Sand Accumulation on the Artificial Seashore

Keiko OSHIDA, Yukari MATSUNAGA, Akiharu KAMIHOGI （Nihon University / Tottori University / Osaka Prefecture University）

Abstract:
This study examined the temporal change in coastal plant distribution on an artificial beach and the effects of sand movement on coastal plant distribution. Regarding the temporal change in coastal plant distribution, Carex kobomugi inhabitation was dominant in the landward areas of Belt A and Belt C in 2003, but a Carex kobomugi and Calystegia soldanella combination was observed there in 2005. The coastal plant dominancy changed over the study period where there was a constant supply of sand. It was speculated that Carex kobomugi would first establish a colony by holding sand with those roots, which plays a role in reinforcing sand stability, and then other coastal plants, such as Calystegia soldanella , might appear there. In the landward area of Belt A, it was speculated that the influence of human pressure, including access to the study area by visitors to the neighboring artificial beach, would have an effect on changes in plant distribution. Namely, it was suggested that sand accumulation and human pressure would affect the temporal change in coastal plant distribution, and Carex kobomugi had no larger change in distribution and was stable, while Calystegia soldanella was extending its habitat over the Carex kobomugi dominant area.

Key Word:
coastal plants, Carex kobomugi, Calystegia soldanella, temporal change, sand accumulation, artificial seashore

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