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This report is an outcome of the high degree of cooperation and collaboration that exists between the implementing partners of the Australia Aid-funded Climate and Ocean Support Program in the Pacific (COSPPac). specifically the Bureau of Meteorology (BoM), the Pacific Community (SPC) and Pacific Regional Environmental Programme (SPREP) together with the valuable ongoing support from the national meteorological services in the IS partner countries and territories.

The global increase in biological invasions is placing growing pressure on the management of ecological and economic systems. However, the effectiveness of current management expenditure is difficult to assess due to a lack of standardised measurement across spatial, taxonomic and temporal scales. Furthermore, there is no quantification of the spending difference between pre-invasion (e.g. prevention) and post-invasion (e.g. control) stages, although preventative measures are considered to be the most cost-effective. Here, we use a comprehensive database of invasive alien species economic costs (InvaCost) to synthesise and model the global management costs of biological invasions, in order to provide a better understanding of the stage at which these expenditures occur.

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