4.7 Article

Geographic and taxonomic trends of rising biological invasion costs

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 817, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.scitotenv.2022.152948

Keywords

Time-series trends; Long term data; meta-analysis; meta-regression; InvaCost; Invasive alien species; Socio-economic impact

Funding

  1. French National Research Agency [ANR-14-CE02-0021]
  2. BNP Paribas Foundation Climate Initiative
  3. Invacost project - AXA Research Fund Chair of Invasion Biology
  4. Research Fellowship fromthe Alexander von Humboldt Foundation

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Invasive alien species (IAS) pose a growing global ecological problem, with increasing economic costs and research interest. The costs of IAS, as well as the literature reporting these costs, have been found to increase significantly over time. These trends vary globally, with North America and Oceania accumulating the most cost literature, and Oceania, Europe, Africa, and North America experiencing the steepest increase in monetary costs. Certain taxonomic groups, such as flatworms, mammals, flowering plants, and vascular plants, show significantly increasing costs. These findings highlight the importance of understanding regional differences in cost reporting and the need for continued research on the impacts of biological invasions.
Invasive alien species (IAS) are a growing global ecological problem. Reports on the socio-economic impacts of biological invasions are accumulating, but our understanding of temporal trends across regions and taxa remains scarce. Accordingly, we investigated temporal trends in the economic cost of IAS and cost-reporting literature using the InvaCost database and meta-regression modelling approaches. Overall, we found that both the cost reporting literature and monetary costs increased significantly over time at the global scale, but costs increased faster than reports. Differences in global trends suggest that cost literature has accumulated most rapidly in North America and Oceania, while monetary costs have exhibited the steepest increase in Oceania, followed by Europe, Africa and North America. More-over, the costs for certain taxonomic groups were more prominent than others and the distribution also differed spa-tially, reflecting a potential lack of generality in cost-causing taxa and disparate patterns of cost reporting. With regard to global trends within the Animalia and Plantae kingdoms, costs for flatworms, mammals, flowering and vascular plants significantly increased. Our results highlight significantly increasing research interest and monetary impacts of biological invasions globally, but uncover key regional differences driven by variability in reporting of costs across countries and taxa. Our findings also suggest that regions which previously had lower research effort (e.g., Africa) ex-hibit rapidly increasing costs, comparable to regions historically at the forefront of invasion research. While these in-creases may be driven by specific countries within regions, we illustrate that even after accounting for research effort (cost reporting), costs of biological invasions are rising.

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