Abstract
The herbicide glyphosate, sold under a variety of commercial names including Roundup® and Vision®, has long been viewed as an environmentally friendly herbicide. In the 1990s, however, after nearly 20 years of use, the first tests were conducted on the herbicide’s effects on amphibians in Australia. The researchers found that the herbicide was moderately toxic to Australian amphibians. The leading manufacturer of glyphosate-based herbicides, Monsanto, declared that the researchers were wrong. Nearly 10 years later, my research group began examining the effects of the herbicides on North American amphibians. Based on an extensive series of experiments, we demonstrated that glyphosate-based herbicides can be highly toxic to larval amphibians. Monsanto declared that we were also wrong. These experiments have formed the basis of a spirited debate between independent, academic researchers, and scientists that either work as consultants for Monsanto or have a vested interest in promoting the application of the herbicide to control undesirable plants in forests and agriculture. The debate also moved into unexpected arenas, including the use of glyphosate-based herbicides in the Colombian drug war in South America where a version of Roundup is being used to kill illegal coca plantations. In 2008, the US EPA completed a risk assessment for the effects of glyphosate-based herbicides on the endangered California red-legged frog (Rana aurora draytonii) and concluded that it could adversely affect the long-term persistence of the species. More recent data from Colombia have confirmed that the herbicides not only pose a risk to tadpoles in shallow wetlands, but that typical applications rates also can kill up to 30% of adult frogs. As one reflects over the past decade, it becomes clear that our understanding of the possible effects of glyphosate-based herbicides on amphibians has moved from a position of knowing very little and assuming no harm to a position of more precise understanding of which concentrations and conditions pose a serious risk.
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Notes
- 1.
- 2.
In the case of glyphosate-based herbicides, the most common reported units are milligrams of acid equivalents per liter (mg a.e./L).
- 3.
http://mac10.umc.pitt.edu/m/FMPro?-db=ma.fp5&-format=d.html&-lay=a&-sortfield=date&-sortorder=descend&keywords=relyea&-max=50&-recid=36262&-find= (last accessed June 2010).
- 4.
http://www.monsanto.com/monsanto/content/products/productivity/roundup/bkg_amphib_05a.pdf (last accessed June 2010).
- 5.
See errata Ecol Appl 19:276.
- 6.
http://mac10.umc.pitt.edu/m/FMPro?-db=ma.fp5&-format=d.html&-lay=a&-sortfield=date&-sortorder=descend&keywords=relyea&-max=50&-recid=36355&-find= (last accessed June 2010).
- 7.
https://www.uoguelph.ca/research/summaries/2006/table1-oac.shtml.
(last accessed June 2010).
- 8.
Database search of AmphibiaWeb conducted on 11/02/09; http://www.amphibiaweb.org/.
- 9.
http://www.biologicaldiversity.org/news/press_releases/rlf-10-19-2006.html (accessed June 2010).
References
Battaglin WA, Rice KC, Focazio MJ, Salmons S, Barry RX (2009) The occurrence of glyphosate, atrazine, and other pesticides in vernal pools and adjacent streams in Washington, DC, Maryland, Iowa, and Wyoming, 2005–2006
Baylis AD (2000) Why glyphosate is a global herbicide: strengths, weaknesses and prospects. Pest Manag Sci 56:299–308
Bernal MH, Solomon KR, Carrasquilla G (2009a) Toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval colombian frogs 1. Laboratory acute toxicity. J Toxicol Environ Health A 72:961–965
Bernal MH, Solomon KR, Carrasquilla G (2009b) Toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval and juvenile colombian frogs 2. Field and laboratory microcosm acute toxicity. J Toxicol Environ Health A 72:966–973
Berrill M, Bertram S, Pauli B (1997) Effects of pesticides on amphibian embryos and larvae. In: Green D (ed) Amphibians in decline: Canadian studies of a global problem. Society for the Study of Amphibians and Reptiles, St. Louis, MO, pp 233–245
Bidwell JR, Gorrie JR (1995) Acute toxicity of a herbicide to selected frog species. Department of Environmental Protection. Technical Series 79, Perth
Brain RA, Solomon KR (2009) Comparisons of the hazards posed to amphibians by the glyphosate spray control program versus the chemical and physical activities of coca production in Colombia. J Toxicol Environ Health A 72:937–948
Carey S, Crk T, Flaherty C, Hurley P, Hetrick J, Moore K, Termes SC (2008) Risks of glyphosate use to federally threatened California red-legged frog (Rana aurora draytonii). US EPA, Washington, DC
Chen CY, Hathaway KM, Folt CL (2004) Multiple stress effects of Vision® herbicide, pH, and food on zooplankton and larval amphibian species from forest wetlands. Environ Toxicol Chem 23:823–831
Dayton L (1995) Our frogs: are they heading for the last round-up? Sydney Morning Herald, 13 September
Edginton AN, Sheridan PM, Stephenson GR, Thompson DG, Boermans HJ (2004) Comparative effects of pH and Vision® herbicide on two life stages of four anuran amphibian species. Environ Toxicol Chem 23:815–822
Edwards WM, Triplett GB Jr, Kramer RM (1980) A watershed study of glyphosate transport in runoff. J Environ Qual 9:661–665
Folmar LC, Sanders HO, Julin AM (1979) Toxicity of the herbicide glyphosate and several of its formulations to fish and aquatic invertebrates. Arch Environ Contam Toxicol 8:269–278
Giesy JP, Dobson S, Solomon KR (2000) Ecotoxicological risk assessment for Roundup® herbicide. Rev Environ Contam Toxicol 167:35–120
Gosner KL (1960) A simplified table for staging anuran embryos and larvae with notes on identification. Herpetologica 16:183–190
Grube A, Donaldson D, Kiely T, Wu L (2011) Pesticide industry sales and usage: 2006 and 2007 market estimates. US EPA, Washington, DC
Hand E (2005) Study finds herbicide is deadly for amphibians. St. Louis Dispatch. August 10
Hayes TB (2004) There is no denying this: defusing the confusion about atrazine. Bioscience 54:1138–1149
Howe CM, Berrill M, Pauli BD, Helbring CC, Werry K, Veldhoen N (2004) Toxicity of glyphosate-cased pesticides to four North American frog species. Environ Toxicol Chem 23:1928–1938
Jones R, Leahy J, Mahoney M, Murray L, Odenkirchen E, Petrie R, Stangel C, Sunzenauer I, Vaituzis Z, Williams AJ (2004) Overview of the ecological risk assessment process in the Office of Pesticide Programs, U.S. Environmental Protection Agency. US EPA, Washington, DC
Jones DK, Hammond JR, Relyea RA (2009) Highly lethal effects of endosulfan across nine species of tadpoles: lag effects and family-level sensitivity. Environ Toxicol Chem 28:1939–1945
Jones DK, Hammond JR, Relyea RA (2010) Roundup® and amphibians: the importance of concentration, application time, and stratification. Environ Toxicol Chem 29:2016–2025
Jones DK, Hammond JR, Relyea RA (2011) Competitive stress can make the herbicide Roundup® more deadly to larval amphibians. Environ Toxicol Chem 30:446–454
Kiely T, Donaldson D, Grube A (2004) Pesticides industry sales and usage: 2000 and 2001 market estimates. US EPA, Washington, DC
Lajmanovich RC, Sandoval MT, Peltzer PM (2003) Induction of mortality and malformation in Scinax nasicus tadpoles exposed to glyphosate formulations. Bull Environ Contam Toxicol 70:612–618
Leonard C (2010) Monsanto 3Q net income sags on weak Roundup sales. Associated Press. June 30, 2010
Lubick N (2007) Drugs, pesticides, and politics – a potent mix in Colombia. Environ Sci Technol 41:3403–3406
Lubick N (2009) Environmental impact of cocaine strategy assessed. Nature News. November 12
Lynch JD, Arroyo SB (2009) Risks to Colombian amphibian fauna from cultivation of coca (Erythroxylum coca): a geographical analysis. J Toxicol Environ Health A 72:974–985
Mann RM, Bidwell JR (1999) The toxicity of glyphosate and several glyphosate formulations to four species of southwestern Australian frogs. Arch Environ Contam Toxicol 36:193–199
Mann RM, Bidwell JR (2000) Application of the FETAX protocol to assess the developmental toxicity of nonylphenol ethoxylate to Xenopus laevis and two Australian frogs. Aquat Toxicol 51:19–29
Mann RM, Bidwell JR (2001) The acute toxicity of agricultural surfactants to the tadpoles of four Australian and two exotic frogs. Environ Poll 114:195–205
Mann RM, Bidwell JR, Tyler MJ (2003) Toxicity of herbicide formulations to frogs and the implications for product registration: a case study from Western Australia. Appl Herpetol 1:13–22
Marshall EJP, Solomon KR, Carrasquilla G (2009) Coca (Erythroxylum coca) control is affected by glyphosate formulations and adjuvants. J Toxicol Environ Health A 72:930–936
Michaels D (2008) Doubt is their product. Oxford University Press, New York, NY
Monsanto (2009) Annual Report to Shareholders
Polis GA, Strong DR (1996) Food web complexity and community dynamics. Am Nat 147:813–846
Relyea RA (2003) Predator cues and pesticides: a double dose of danger for amphibians. Ecol Appl 13:1515–1521
Relyea RA (2004a) Synergistic impacts of malathion and predatory stress on six species of North American tadpoles. Environ Toxicol Chem 23:1080–1084
Relyea RA (2004b) The growth and survival of five amphibian species exposed to combinations of pesticides. Environ Toxicol Chem 23:1737–1742
Relyea RA (2005a) The impact of insecticides and herbicides on the biodiversity and productivity of aquatic communities. Ecol Appl 15:618–627
Relyea RA (2005b) The lethal impact of Roundup® on aquatic and terrestrial amphibians. Ecol Appl 15:1118–1124
Relyea RA (2005c) The lethal impacts of Roundup and predatory stress on six species of North American tadpoles. Arch Environ Contam Toxicol 48:351–357
Relyea RA (2006) Response to Thompson et al. Letter to the editor, “The impact of insecticides and herbicides on the biodiversity and productivity of aquatic communities”. Ecol Appl 16:2027–2034
Relyea RA, Jones DK (2009) The toxicity of Roundup Original MAX® to 13 species of larval amphibians. Environ Toxicol Chem 28:2004–2008
Relyea RA, Mills N (2001) Predator-induced stress makes the pesticide carbaryl more deadly to grey treefrog tadpoles (Hyla versicolor). Proc Natl Acad Sci USA 98:2491–2496
Relyea RA, Schoeppner NM, Hoverman JT (2005) Pesticides and amphibians: the importance of community context. Ecol Appl 15:1125–1134
Smith GR (2001) Effects of acute exposure to a commercial formulation of glyphosate on the tadpoles of two species of anurans. Bull Environ Contam Toxicol 67:483–488
Solomon KR, Thompson DG (2003) Ecological risk assessment for aquatic organisms from over-water uses of glyphosate. J Toxicol Environ Health B Crit Rev 6:289–324
Solomon KR, Anadón A, Carrasquilla G, Cerdeira AL, Marshall J, Sanin L-H (2007) Coca and poppy eradication in Colombia: environmental and human health assessment of aerially applied glyphosate. Rev Environ Contam Toxicol 190:43–125
Struger J, Thompson D, Staznik B, Martin P, McDaniel T, Marvin C (2008) Occurrence of glyphosate in surface waters of southern Ontario. Bull Environ Contam Toxicol 80:378–384
Stuart SN, Chanson JS, Cox NA, Young BE, Rodrigues ASL, Fischman DL, Waller RW (2004) Status and trends of amphibian declines and extinctions worldwide. Science 306:1783–1786
Taylor BE, Scott DE, Gibbons JW (2006) Catastrophic reproductive failure, terrestrial survival, and persistence of the marbled salamander. Conserv Biol 20:792–801
Thompson DG, Wojtaszek BF, Staznik B, Chartrand DT, Stephenson GR (2004) Chemical and biomonitoring to assess potential acute effects of Vision® herbicide on native amphibian larvae in forest wetlands. Environ Toxicol Chem 23:843–849
Thompson DG, Solomon KR, Wojtaszek BF, Edginton AN, Stephenson GR (2006) Letter to the editor, “The impact of insecticides and herbicides on the biodiversity and productivity of aquatic communities”. Ecol Appl 16:2022–2027
US EPA (1993) R.E.D. Facts – Glyphosate. United States Environmental Protection Agency. EPA-739-F-93-011
US CIA (2000) Plan Colombia’s potential impact on the Andean cocaine trade: an examination of two scenarios. Intelligence Report 19 September 2000. DCI Crime and Narcotics Center
US GAO (2008) Plan Colombia: drug reduction goals were not fully met, but security has improved; U.S. agencies need more detailed plans for reducing assistance. Report 09–71
US Senate (2005) Department of State, Foreign Operations, and Related Programs Appropriations Bill, 2006. Report 109–96
WHO (1994) International programme on chemical safety. Environmental Health Criteria 159 – Glyphosate. World Health Organization, Geneva, Switzerland
Williams BK, Semlitsch RD (2009) Larval responses of three Midwestern anurans to chronic, low-dose exposures of four herbicides. Archiv Environ Contam Toxicol 58:819–827
Wojtaszek BF, Staznik B, Chartrand DT, Stephenson GR, Thompson DG (2004) Effects of Vision® herbicide on mortality, avoidance response, and growth of amphibian larvae in two forest wetlands. Environ Toxicol Chem 23:832–842
Acknowledgments
This chapter was improved by the comments of Christine Bishop, Will Brogan, Rickey Cothran, Maya Groner, John Hammond, Jason Hoverman, Jessica Hua, Heather Shaffery, Aaron Stoler, and several anonymous reviewers. I also thank the National Science Foundation for their continued support of my research. For the record, I have never accepted any funding from antipesticide groups.
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Relyea, R.A. (2011). Amphibians Are Not Ready for Roundup® . In: Elliott, J., Bishop, C., Morrissey, C. (eds) Wildlife Ecotoxicology. Emerging Topics in Ecotoxicology, vol 3. Springer, New York, NY. https://doi.org/10.1007/978-0-387-89432-4_9
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