[pp.119-128]

The Propagule Banks of the Drained Sites and Remnant Wetlands in the Ogura-ike Area of Kyoto, Japan: Implications for Re

Ayumi IMANISHI, Junichi IMANISHI, Hitoshi MATSUMOTO, Yukihiro MORIMOTO and Yosihiro NATUHARA （Kyoto University / Nagoya University）

Abstract:
We examined the availability of the propagule banks of drained sites and remnant wetlands for vegetative restoration in the Ogura-ike area. Both the extant vegetation and the propagule banks in the remnant wetlands were poor, while 42 wetland species including 11 endangered species germinated from the soil of the drained sites. This result indicates that drained land has better potential for vegetative restoration than do remnant wetlands in the Ogura-ike area. It is believed that species that adapt to the rice cultivation cycle could re-establish themselves even after drainage because drained land has been used as paddy fields and is periodically flooded. However, most of the wetland species that germinated from the soil of the drained sites were annuals. There are some limitations to restoring extinct perennials and/or floating-leaved species from propagule banks alone in sites that were drained at least 60 years ago.

Key Word:
nature restoration, reclaimed land, paddy field, seed bank, Characeae species

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