Yuji Hara, Wakayama University, Wakayama, Japan

Maki Ryu, Fransje hooimeijer, steffen nijhuis, & Arjan timmeren, TU Delft, Delft, The Netherlands

Presentation Title: Agricultural land development processes differentiate wetland restoration methods toward creating an ecological network in Japan based on the Netherlands




The current proposal by the national government of Japan for an ecological network in the Osaka city region was partially influenced by ecological networks in the Netherlands. However, the government specified the physical spatial pattern of these wetland restoration sites without considering a historical geographic viewpoint for both Japan and the Netherlands. On the field project scale, there are similarities in wetland restoration processes and measures in the coastal reclaimed land (unused industrial sites) between Japan (e.g., Osaka Nankou Bird Sanctuary) and the Netherlands (e.g., Oostvaardersplassen). On the other hand, there are differences in wetland restoration measures in the farmlands between Japan (the restoration of abandoned rice paddy fields) and the Netherlands (e.g., Tiengemeten, the conversion of dry fields to natural wetlands) that must be considered before any major projects are undertaken.


Key Lessons Learned

Regional considerations and historical geography perspectives are very important when ecological networks and restoration projects are being planned.


Policy/Practice Implications of Research

Although 'good' planning practices of foreign counties can be valuable in developing ecological networks/nature restorations in one’s own country, directly importing those ideas and practices without any consideration of regional conditions can be problematic.  A consideration of the historical/geographical backgrounds of both the ideas and the local region is necessary.


Knowledge Gaps and Needs

The potential for vegetation recovery; biodiversity baselines; and, local variation of resilience at the regional level are future research needs.


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