Biological invasions by amphibian and reptile species (i.e. herpetofauna) are numerous and widespread, having caused severe impacts on ecosystems, the economy and human health. However, there remains no synthesised assessment of the economic costs of these invasions. Therefore, using the most comprehensive database on the economic costs of invasive alien species worldwide (InvaCost), we analyse the costs caused by invasive alien herpetofauna according to taxonomic, geographic, sectoral and temporal dimensions, as well as the types of these costs. The cost of invasive herpetofauna totaled at 17.0 billion US$ between 1986 and 2020, divided split into 6.3 billion US$ for amphibians, 10.4 billion US$ for reptiles and 334 million US$ for mixed classes. However, these costs were associated predominantly with only two species (brown tree snake Boiga irregularis and American bullfrog Lithobates catesbeianus), with 10.3 and 6.0 billion US$ in costs, respectively. Costs for the remaining 19 reported species were relatively minor (< 0.6 billion US$), and they were entirely unavailable for over 94% of known invasive herpetofauna worldwide. Also, costs were positively correlated with research effort, suggesting research biases towards well-known taxa. So far, costs have been dominated by predictions and extrapolations (79%), and thus empirical observations for impact were relatively scarce. The activity sector most affected by amphibians was authorities-stakeholders through management (> 99%), while for reptiles, impacts were reported mostly through damages to mixed sectors (65%). Geographically, Oceania and Pacific Islands recorded 63% of total costs, followed by Europe (35%) and North America (2%). Cost reports have generally increased over time but peaked between 2011 and 2015 for amphibians and 2006 to 2010 for reptiles. A greater effort in studying the costs of invasive herpetofauna is necessary for a more complete understanding of invasion impacts of these species. We emphasise the need for greater control and prevention policies concerning the spread of current and future invasive herpetofauna.

Centro de Estudos Geográficos Instituto de Geografia e Ordenamento do Território IGOT Universidade de Lisboa Rua Branca Edmée Marques 1600 276 Lisbon Portugal

Department of Biology Carleton University Ottawa Canada

Department of River Ecology and Conservation Senckenberg Research Institute and Natural History Museum Frankfurt Gelnhausen Germany

Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses University of South Bohemia in České Budějovice Zátiší 728 2 389 25 Vodňany Czech Republic

Laboratório Associado Terra Lisbon Portugal

School of Biological Sciences Queen's University Belfast Belfast BT9 5DL UK

Université Paris Saclay CNRS AgroParisTech Ecologie Systématique Evolution 91405 Orsay France

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Seebens H, Bacher S, Blackburn TM, Capinha C, Dawson W, Dullinger S, Lenzner B, Liebhold A, Pattison Z, Pergl J, Pyšek P, Winter M, Essl F. Projecting the continental accumulation of alien species through to 2050. Glob. Change Biol. 2021;27(5):970–982. PubMed

Bellard C, Cassey P, Blackburn TM. Alien species as a driver of recent extinctions. Biol. Lett. 2016;12(2):20150623. PubMed PMC

Walsh JR, Carpenter SR, Vander Zanden MJ. Invasive species triggers a massive loss of ecosystem services through a trophic cascade. Proc. Natl. Acad. Sci. 2016;113(15):4081–4085. PubMed PMC

Linders TEW, Schaffner U, Eschen R, Abebe A, Choge SK, Nigatu L, Mbaabu PR, Shiferaw H, Allan E. Direct and indirect effects of invasive species: Biodiversity loss is a major mechanism by which an invasive tree affects ecosystem functioning. J. Ecol. 2019;107(6):2660–2672.

Diagne, C., Ballesteros-Mejia, L., Bodey, T., Cuthbert, R., Fantle-Lepczyk, J., Angulo, E., Dobigny, G., & Courchamp, F. Economic costs of invasive rodents worldwide: The tip of the iceberg (2021). PubMed PMC

Schaffner F, Medlock JM, Van Bortel AW. Public health significance of invasive mosquitoes in Europe. Clin. Microbiol. Infect. 2013;19(8):685–692. PubMed

Schaffner U, Steinbach S, Sun Y, Skjøth CA, de Weger LA, Lommen ST, Augustinus B, Bonini M, Karrer G, Šikoparija B, Thibaudon M, Müller-Schärer H. Biological weed control to relieve millions from Ambrosia allergies in Europe. Nat. Commun. 2020;11(1):1–7. PubMed PMC

Shackleton RT, Shackleton CM, Kull CA. The role of invasive alien species in shaping local livelihoods and human well-being: A review. J. Environ. Manag. 2019;229:145–157. PubMed

Clavero M, García-Berthou E. Invasive species are a leading cause of animal extinctions. Trends Ecol. Evol. 2005;20(3):110. PubMed

Crystal-Ornelas R, Lockwood JL. The ‘known unknowns’ of invasive species impact measurement. Biol. Invasions. 2020;22(4):1513–1525.

Florencio M, Lobo JM, Bini LM. Biases in global effects of exotic species on local invertebrates: A systematic review. Biol. Invasions. 2019;21(10):3043–3061.

Measey J, Basson A, Rebelo AD, Nunes AL, Vimercati G, Louw M, Mohanty NP. Why have a pet amphibian? Insights from YouTube. Front. Ecol. Evol. 2019;7:52.

Ossiboff RJ, Towe AE, Brown MA, Longo AV, Lips KR, Miller DL, Carter E, Gray M, Frasca S., Jr Differentiating Batrachochytrium dendrobatidis and B. salamandrivorans in amphibian chytridiomycosis using RNAScope in situ hybridization. Front. Vet. Sci. 2019;6:304. PubMed PMC

Kraus, F. Alien Reptiles and Amphibians: A Scientific Compendium and Analysis, vol. 4. (Springer Science & Business Media, 2009).

Kraus F. Impacts from invasive reptiles and amphibians. Annu. Rev. Ecol. Evol. Syst. 2015;46:75–97.

Ramsay, N. F., Ng, P. K. A., O'Riordan, R. M., & Chou, L. M. The red-eared slider (Trachemys scripta elegans) in Asia: A review. Biological invaders in inland waters: Profiles, distribution, and threats 161–174 (2007).

Lindsay MK, Zhang Y, Forstner MR, Hahn D. Effects of the freshwater turtle Trachemys scripta elegans on ecosystem functioning: An approach in experimental ponds. Amphibia-Reptilia. 2013;34(1):75–84.

Phillips BL, Shine R. An invasive species induces rapid adaptive change in a native predator: Cane toads and black snakes in Australia. Proc. R. Soc. B Biol. Sci. 2006;273(1593):1545–1550. PubMed PMC

Shanmuganathan T, Pallister J, Doody S, McCallum H, Robinson T, Sheppard A, Hardy C, Halliday D, Venables D, Voysey R, Tanja S, Hinds L, Hyatt A. Biological control of the cane toad in Australia: A review. Anim. Conserv. 2010;13:16–23.

Smart AS, Tingley R, Phillips BL. Estimating the benefit of quarantine: Eradicating invasive cane toads from islands. NeoBiota. 2020;60:117.

Reaser JK, Meyerson LA, Cronk Q, De Poorter MAJ, Eldrege LG, Green E, Kairo MTK, Latasi P, Mack R, Mauremootoo J, O'Dowd D, Orapa W, Sastroutomo S, Saunders AS, Thrainsson S, Vaiutu L. Ecological and socioeconomic impacts of invasive alien species in island ecosystems. Environ. Conserv. 2007;34:98–111.

Fritts TH. Economic costs of electrical system instability and power outages caused by snakes on the island of Guam. Int. Biodeterior. Biodegrad. 2002;49(2–3):93–100.

Rodda GH, Fritts TH, Chiszar D. The disappearance of Guam's wildlife. Bioscience. 1997;47(9):565–574.

Kraus, F. Reptiles and amphibians. In Encyclopedia of Biological Invasions 590–594. (University of California Press, 2011).

Kraus F. Global trends in alien reptiles and amphibians. Aliens Invasive Species Bull. 2009;28:13–18.

Capinha C, Marcolin F, Reino L. Human-induced globalization of insular herpetofaunas. Glob. Ecol. Biogeogr. 2020;29(8):1328–1349.

Reed RN, Kraus F. Invasive reptiles and amphibians: Global perspectives and local solutions. Anim. Conserv. 2010;13:3–4.

Wasserman RJ, Dick JT, Welch RJ, Dalu T, Magellan K. Site and species selection for religious release of non-native fauna. Conserv. Biol. 2019;33(4):969–971. PubMed

Li X, Liu X, Kraus F, Tingley R, Li Y. Risk of biological invasions is concentrated in biodiversity hotspots. Front. Ecol. Environ. 2016;14(8):411–417.

Bellard C, Jeschke JM. A spatial mismatch between invader impacts and research publications. Conserv. Biol. 2016;30(1):230–232. PubMed

Diagne C, Leroy B, Gozlan RE, Vaissière AC, Assailly C, Nuninger L, Roiz D, Jourdain F, Jarić I, Courchamp F. InvaCost, a public database of the economic costs of biological invasions worldwide. Sci. Data. 2020;7(1):1–12. PubMed PMC

Diagne C, Leroy B, Vaissière AC, Gozlan RE, Roiz D, Jarić I, Salles JM, Corey J, Bradshaw C, Courchamp F. High and rising economic costs of biological invasions worldwide. Nature. 2021;592(7855):571–576. PubMed

Cuthbert, R. N., Diagne, C., Haubrock, P. J., Turbelin, A. J., & Courchamp, F. Are the “100 of the world’s worst” invasive species also the costliest? Biol. Invasions 1–10 (2021).

Cuthbert RN, Pattison Z, Taylor NG, Verbrugge L, Diagne C, Ahmed DA, Leroy B, Angulo E, Briski E, Capinha C, Catford J, Dalu T, Essl F, Gozlan R, Haubrock PJ, Kourantidou M, Kramer AM, Renault D, Wasserman R, Courchamp F. Global economic costs of aquatic invasive alien species. Sci. Total Environ. 2021;775:145238. PubMed

Haubrock PJ, Cuthbert RN, Yeo DC, Banerjee AK, Liu C, Diagne C, Courchamp F. Biological invasions in Singapore and Southeast Asia: Data gaps fail to mask potentially massive economic costs. NeoBiota. 2021;67:131–152.

Van Wilgen NJ, Gillespie MS, Richardson DM, Measey J. A taxonomically and geographically constrained information base limits non-native reptile and amphibian risk assessment: A systematic review. PeerJ. 2018;6:e5850. PubMed PMC

Cuthbert R, Bartlett A, Turbelin A, Haubrock P, Diagne C, Pattison Z, Courchamp F, Catford J. Economic costs of biological invasions in the United Kingdom. Neobiota. 2021;67:299–328.

Heringer G, Angulo E, Ballesteros-Mejia L, Capinha C, Courchamp F, Diagne C, Duboscq-Carra VG, Nuñez MA, Zenni RD. The economic costs of biological invasions in Central and South America: A first regional assessment. NeoBiota. 2021;67:401.

Paini DR, Sheppard AW, Cook DC, De Barro PJ, Worner SP, Thomas MB. Global threat to agriculture from invasive species. Proc. Natl. Acad. Sci. 2016;113(27):7575–7579. PubMed PMC

Capinha C, Seebens H, Cassey P, García-Díaz P, Lenzner B, Mang T, Moser D, Pyšek P, Rödder D, Scalera R, Winter M, Dullinger S, Essl F. Diversity, biogeography and the global flows of alien amphibians and reptiles. Divers. Distrib. 2017;23(11):1313–1322.

Kumschick S, Measey GJ, Vimercati G, De Villiers FA, Mokhatla MM, Davies SJ, et al. How repeatable is the Environmental Impact Classification of Alien Taxa (EICAT)? Comparing independent global impact assessments of amphibians. Ecol. Evol. 2017;7(8):2661–2670. PubMed PMC

Diagne C, Catford JA, Essl F, Nuñez MA, Courchamp F. What are the economic costs of biological invasions? A complex topic requiring international and interdisciplinary expertise. NeoBiota. 2020;63:25.

Diagne C, Turbelin A, Moodley D, Novoa A, Leroy B, Angulo E, Adamjy T, Dia C, Ahmed T, Tambo J, Dobigny G, Courchamp F. The economic costs of biological invasions in Africa: A growing but neglected threat? NeoBiota. 2021;67:11–51.

Bradshaw CJ, Hoskins AJ, Haubrock PJ, Cuthbert RN, Diagne C, Leroy B, Andrews L, Page B, Cassey P, Sheppard AW, Courchamp F. Detailed assessment of the reported economic costs of invasive species in Australia. NeoBiota. 2021;67:511–550.

Dorcas ME, Willson JD, Reed RN, Snow RW, Rochford MR, Miller MA, Meshaka W, Andreadis P, Mazzotti F, Romagosa C, Hart KM. Severe mammal declines coincide with proliferation of invasive Burmese pythons in Everglades National Park. Proc. Natl. Acad. Sci. 2012;109(7):2418–2422. PubMed PMC

Mazzotti FJ, Rochford M, Vinci J, Jeffery BM, Eckles JK, Dove C, Sommers KP. Implications of the 2013 Python Challenge® for ecology and management of Python molorus bivittatus (Burmese Python) in Florida. Southeast. Nat. 2016;15(sp8):63–74.

Smith BJ, Cherkiss MS, Hart KM, Rochford MR, Selby TH, Snow RW, Mazzotti FJ. Betrayal: Radio-tagged Burmese pythons reveal locations of conspecifics in Everglades National Park. Biol. Invasions. 2016;18(11):3239–3250.

Easteal S. The history of introductions of Bufo marinus (Amphibia: Anura); A natural experiment in evolution. Biol. J. Lin. Soc. 1981;16(2):93–113.

Haubrock, P. J., Bernery, C., Cuthbert, R. N., Liu, C., Kourantidou, M., Leroy, B., Turbelin, A., Kramer, A. M., Verbrugge, L., Diagne, C., Courchamp, F., & Gozlan, R. E. What is the recorded economic cost of alien invasive fishes worldwide? (2021).

Angulo, E., Hoffmann, B., Ballesteros-Mejia, L., Taheri, A., Balzani, P., Renault, D., Cordonnier, M., Bellard, C., Diagne, C., Ahmed, D. A., Watari, Y., & Courchamp, F. Economic costs of invasive alien ants worldwide. (2021).

Kouba, A., Oficialdegui, F., Cuthbert, R., Kourantidou, M., Tricarico, E., Leroy, B., Gozlan, R., Courchamp, F., & Haubrock, P. Feeling the pinch: Global economic costs of crayfish invasions and comparison with other aquatic crustaceans (2021).

Dufresnes C, Di Santo L, Leuenberger J, Schuerch J, Mazepa G, Grandjean N, et al. Cryptic invasion of Italian pool frogs (Pelophylax bergeri) across Western Europe unraveled by multilocus phylogeography. Biol. Invasions. 2017;19(5):1407–1420.

Kumschick S, Vimercati G, De Villiers FA, Mokhatla MM, Davies SJ, Thorp CJ, et al. Impact assessment with different scoring tools: How well do alien amphibian assessments match? NeoBiota. 2017;33:53. PubMed

Crystal-Ornelas R, Hudgins EJ, Cuthbert RN, Haubrock PJ, Fantle-Lepczyk J, Angulo E, Kramer AM, Ballesteros-Mejia L, Leroy B, Leung B, Lopez-Lopez E, Diagne C, Courchamp F. Economic costs of biological invasions within North America. NeoBiota. 2021;67:485.

Angulo E, Diagne C, Ballesteros-Mejia L, Adamjy T, Ahmed DA, Akulov E, Banerjee A, Capinha C, Dia C, Dobigny G, Duboscq-Carra V, Golivets M, Haubrok PJ, Heringer G, Kirichencko N, Kourantidou M, Liu C, Nuñez M, Renault D, Courchamp F. Non-English languages enrich scientific knowledge: The example of economic costs of biological invasions. Sci. Total Environ. 2021;775:144441. PubMed

Taylor, R., & Edwards, G. A review of the impact and control of cane toads in Australia with recommendations for future research and management approaches. A report to the Vertebrate Pests Committee from the National Cane Toad Taskforce (2005).

Burnett K, Pongkijvorasin S, Roumasset J. Species invasion as catastrophe: The case of the brown tree snake. Environ. Resour. Econ. 2012;51(2):241–254.

Haubrock, P. J., Cuthbert, R. N., Ricciardi, A., Diagne, C., & Courchamp, F. Massive economic costs of invasive bivalves in freshwater ecosystems (2021).

Pimentel D, Zuniga R, Morrison D. Update on the environmental and economic costs associated with alien-invasive species in the United States. Ecol. Econ. 2005;52(3):273–288.

Fantle-Lepczyk JE, Haubrock PJ, Kramer AM, Cuthbert RN, Turbelin AJ, Crystal-Ornelas R, Diagne C, Courchamp F. Economic costs of biological invasions in the United States. bioRxiv. 2021;89:89. PubMed

European Environment Agency. The impacts of invasive alien species in Europe. Publications Office of the European Union (2013).

Measey J, Davies SJ, Vimercati G, Rebelo A, Schmidt W, Turner A. Invasive amphibians in southern Africa: A review of invasion pathways. Bothalia-Afr. Biodivers. Conserv. 2017;47(2):1–12.

Anton A, Geraldi NR, Ricciardi A, Dick JT. Global determinants of prey naiveté to exotic predators. Proc. R. Soc. B. 2020;287(1928):20192978. PubMed PMC

Rico-Sánchez AE, Haubrock PJ, Cuthbert RN, Angulo E, Ballesteros-Mejia L, López-López E, Duboscq-Carra VG, Nuñez MA, Diagne C, Courchamp F. Economic costs of invasive alien species in Mexico. NeoBiota. 2021;67:459–483.

McNeely, J. Invasive species: A costly catastrophe for native biodiversity. Land Use Water Resour. Res.1(1732-2016-140260) (2001).

Sax DF, Gaines SD. Species invasions and extinction: The future of native biodiversity on islands. Proc. Natl. Acad. Sci. 2008;105:11490–11497. PubMed PMC

Christie M, Fazey I, Cooper R, Hyde T, Kenter JO. An evaluation of monetary and non-monetary techniques for assessing the importance of biodiversity and ecosystem services to people in countries with developing economies. Ecol. Econ. 2012;83:67–78.

Essl F, Dullinger S, Rabitsch W, Hulme PE, Hülber K, Jarošík V, Kleinbauer I, Krausmann F, Kühn I, Nentwig W, Vilá M, Genovesi P, Gherardi F, Desprez-Loustau ML, Roques A, Pyšek P. Socioeconomic legacy yields an invasion debt. Proc. Natl. Acad. Sci. 2011;108(1):203–207. PubMed PMC

Seebens H, Blackburn TM, Dyer EE, Genovesi P, Hulme PE, Jeschke JM, Pagad S, Pyšek P, Winter M, Arianoutsou M, Bacher S, Blasius B, Brundu G, Capinha C, Celesti-Grapow L, Dawson W, Dullinger S, Fuentes N, Jäger H, Kartesz J, Kenis M, Kreft H, Kühn I, Lenzner B, Liebhold A, Mosena A, Moser D, Nishhino M, Pearman D, Pergl J, Rabitsch W, Rojas-Sandoval J, Roques A, Rorke S, Rossinelli S, Roy HE, Scalera R, Schindler S, Štajerová K, Tokarska-Guzik B, Van Kleunen M, Walker K, Weigelt P, Yamanaka T, Essl F. No saturation in the accumulation of alien species worldwide. Nat. Commun. 2017;8(1):1–9. PubMed PMC

Ahmed, D. A., Hudgins, E. J., Cuthbert, R. N., Kourantidou, M., Diagne, C., Haubrock, P. J., et al. Managing biological invasions: The cost of inaction. Biol. Invasions. 1–20. (2022).

Leung B, Lodge DM, Finnoff D, Shogren JF, Lewis MA, Lamberti G. An ounce of prevention or a pound of cure: Bioeconomic risk analysis of invasive species. Proc. R. Soc. Lond. Ser. B Biol. Sci. 2002;269(1508):2407–2413. PubMed PMC

Haubrock PJ, Cuthbert RN, Hudgins EJ, Crystal-Ornelas R, Kourantidou M, Moodley D, et al. Geographic and taxonomic trends of rising biological invasion costs. Sci. Total Environ. 2022;817:152948. PubMed

Kopecký O, Kalous L, Patoka J. Establishment risk from pet-trade freshwater turtles in the European Union. Knowl. Manag. Aquat. Ecosyst. 2013;410:02.

Mohanty NP, Measey J. The global pet trade in amphibians: Species traits, taxonomic bias, and future directions. Biodivers. Conserv. 2019;28(14):3915–3923.

Altherr S, Lameter K. The rush for the rare: Reptiles and amphibians in the European pet trade. Animals. 2020;10:2085. PubMed PMC

Cuthbert RN, Diagne C, Hudgins EJ, Turbelin A, Ahmed DA, Albert C, et al. Biological invasion costs reveal insufficient proactive management worldwide. Sci. Total Environ. 2022;819:153404. PubMed

Ricciardi, A. Invasive species. In Ecological Systems 161–178. (Springer, 2013).

Leroy, B., Kramer, A. M., Vaissière, A. C., Courchamp, F., & Diagne, C. Analysing global economic costs of invasive alien species with the invacost R package. bioRxiv (2020).

Recent advances in availability and synthesis of the economic costs of biological invasions