Establishing a management plan for the invasive alien species Rudbeckia laciniata L. on multiple spatial scales: large-scale map for strategy and small-scale map for specific action.
Thematic mapping is an effective tool for the management of alien species. The spatial scale of this thematic mapping is a key issue because maps at different scales can serve different purposes. Large-scale maps are useful for policy planning, such as eradication or mitigation, whereas small-scale maps are useful for the implementation of management strategies. In this case study we established a thematic map for management of Rudbeckia laciniata L. in the town of Kokonoe, covering a part of Kujyu-Aso National Park. On a large scale, we divided the current distribution range of this species into zones for eradication, suppression of expansion, and monitoring. On a smaller scale, we set priorities for eradication work on many R. laciniata populations in the eradication zone. A comprehensive management plan, i.e., a thematic map, should contain these multi-scale maps. We have organised a series of such mapping procedures for conducting effective management by citizen volunteers, municipal government, and the national park office.