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Quantitative risk assessment of largemouth bass (Micropterus salmoides) invasion in South Korea under different climate change scenarios

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Abstract

The number of invasive species threatening freshwater habitats are increasing globally, and can be accelerated by climate change. Thus, risk assessments of potential invasive species are required for establishing prevention measures, in which quantitative risk assessments provide results objectively. In this study, the invasion risk of largemouth bass (Micropterus salmoides) in four major river basins (the Han, Nakdong, Geum, and Yeongsan) in South Korea was evaluated using an ensemble of species distribution models (SDMs). A weighted ensemble of the SDMs was developed to predict the probability of largemouth bass occurrence in the present (2011–2015) and two future periods: 2050 (2046–2055) and 2080 (2076–2085). The invasion risk of largemouth bass was evaluated using two approaches: relative and absolute risk assessments. Both approaches predicted an increase in Tier 1 (the highest risk) areas under representative concentration pathway (RCP) 4.5; however, a decrease in the areas of concern under RCP 8.5. In particular, the upper streams of the Nakdong and Han river basins are expected to be at risk in the future. In addition, Tier 1 risk areas are predicted to shift northward under both RCP 4.5 and 8.5 scenarios, especially in the Nakdong River Basin. This study provides a quantitative risk assessment tool based on the SDMs for the management of largemouth bass invasion under climate change.

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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This study was supported by the Korea Environment Industry & Technology Institute (KEITI) through the Exotic Invasive Species Management Program, funded by the Korea Ministry of Environment (MOE) [RE201807019].

Funding

This study was supported by the Korea Environment Industry & Technology Institute through the Exotic Invasive Species Management Program, funded by the Korea Ministry of Environment [RE201807019].

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Contributions

Conceptualization: ZK, JJ, EH; data curation: ZK, YC; funding acquisition: SJK, K-GA, JJ; methodology: ZK, YC, TS; visualization: ZK, TS; writing—original draft: ZK; writing—review and editing: JJ.

Corresponding author

Correspondence to Jinho Jung.

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Kim, Z., Cho, Y., Shim, T. et al. Quantitative risk assessment of largemouth bass (Micropterus salmoides) invasion in South Korea under different climate change scenarios. Aquat Sci 86, 3 (2024). https://doi.org/10.1007/s00027-023-01017-y

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  • DOI: https://doi.org/10.1007/s00027-023-01017-y

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