Climate change will increase aflatoxin presence in US Corn
The impacts of climate change on agricultural production are a global concern and have already begun to occur (Kawasaki 2018 Am. J. Agric. Econ . 101 172–92; Ortiz-Bobea et al 2021 Nat. Clim. Change 11 306–12), with major drivers including warmer temperatures and the occurrence of extreme weather ev...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ac6435 |
| _version_ | 1797746967276683264 |
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| author | Jina Yu David A Hennessy Jesse Tack Felicia Wu |
| author_facet | Jina Yu David A Hennessy Jesse Tack Felicia Wu |
| author_sort | Jina Yu |
| collection | DOAJ |
| description | The impacts of climate change on agricultural production are a global concern and have already begun to occur (Kawasaki 2018 Am. J. Agric. Econ . 101 172–92; Ortiz-Bobea et al 2021 Nat. Clim. Change 11 306–12), with major drivers including warmer temperatures and the occurrence of extreme weather events (Lobell and Field 2007 Environ. Res. Lett. 2 014002; Challinor et al 2014 Nat. Clim. Chang e 4 287; Rosenzweig et al 2001 Glob. Change Hum. Health 2 90–104; Schlenker and Roberts 2009 Proc. Natl Acad. Sci. USA 106 15594–8; Lobell et al 2014 Science 344 516–9; Ortiz-Bobea et al 2019 Environ. Res. Lett. 14 064003). An important dimension of the climate change-crop yield relationship that has often been overlooked in the empirical literature is the influence that warming temperatures can have on plant damage arriving through biotic channels, such as pest infestation or fungal infection (Rosenzweig et al 2001 Glob. Change Hum. Health 2 90–104). Aflatoxins are carcinogenic chemicals produced by the fungi Aspergillus flavus and A. parasiticus, which commonly infect food crops. Currently, in the United States, aflatoxin is a perennial contaminant in corn grown in the South, but rare in the Corn Belt and northern states. Climate change may expand aflatoxin’s geographical prevalence, however; because hot, dry summers promote aflatoxin accumulation. Here we model aflatoxin risk as a function of corn plant growth stages and weather to predict US regions with high aflatoxin risk in 2031–2040, based on 16 climate change models. Our results suggest that over 89.5% of corn-growing counties in 15 states, including the Corn Belt, will experience increased aflatoxin contamination in 2031–2040 compared to 2011–2020. Interestingly, the results are spatially heterogeneous and include several southern counties expected to have lower aflatoxin risk, because the causative fungi become inactivated at very high temperatures. |
| first_indexed | 2024-03-12T15:44:23Z |
| format | Article |
| id | doaj.art-bb467d5038654f2bbf62c639104e2ce7 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:44:23Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-bb467d5038654f2bbf62c639104e2ce72023-08-09T15:32:37ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-0117505401710.1088/1748-9326/ac6435Climate change will increase aflatoxin presence in US CornJina Yu0https://orcid.org/0000-0003-0951-1395David A Hennessy1https://orcid.org/0000-0001-7293-9963Jesse Tack2https://orcid.org/0000-0003-1186-7462Felicia Wu3https://orcid.org/0000-0003-0493-0451Applied Economics, Division of Business and Management, Beijing Normal University—Hong Kong Baptist University United International College , Zhuhai, People’s Republic of ChinaDepartment of Economics, Iowa State University , Ames, IA, United States of AmericaDepartment of Agricultural Economics, Kansas State University , Manhattan, KS, United States of AmericaDepartment of Food Science and Human Nutrition, Michigan State University , East Lansing, MI, United States of America; Department of Agricultural, Food, and Resource Economics, Michigan State University , East Lansing, MI, United States of AmericaThe impacts of climate change on agricultural production are a global concern and have already begun to occur (Kawasaki 2018 Am. J. Agric. Econ . 101 172–92; Ortiz-Bobea et al 2021 Nat. Clim. Change 11 306–12), with major drivers including warmer temperatures and the occurrence of extreme weather events (Lobell and Field 2007 Environ. Res. Lett. 2 014002; Challinor et al 2014 Nat. Clim. Chang e 4 287; Rosenzweig et al 2001 Glob. Change Hum. Health 2 90–104; Schlenker and Roberts 2009 Proc. Natl Acad. Sci. USA 106 15594–8; Lobell et al 2014 Science 344 516–9; Ortiz-Bobea et al 2019 Environ. Res. Lett. 14 064003). An important dimension of the climate change-crop yield relationship that has often been overlooked in the empirical literature is the influence that warming temperatures can have on plant damage arriving through biotic channels, such as pest infestation or fungal infection (Rosenzweig et al 2001 Glob. Change Hum. Health 2 90–104). Aflatoxins are carcinogenic chemicals produced by the fungi Aspergillus flavus and A. parasiticus, which commonly infect food crops. Currently, in the United States, aflatoxin is a perennial contaminant in corn grown in the South, but rare in the Corn Belt and northern states. Climate change may expand aflatoxin’s geographical prevalence, however; because hot, dry summers promote aflatoxin accumulation. Here we model aflatoxin risk as a function of corn plant growth stages and weather to predict US regions with high aflatoxin risk in 2031–2040, based on 16 climate change models. Our results suggest that over 89.5% of corn-growing counties in 15 states, including the Corn Belt, will experience increased aflatoxin contamination in 2031–2040 compared to 2011–2020. Interestingly, the results are spatially heterogeneous and include several southern counties expected to have lower aflatoxin risk, because the causative fungi become inactivated at very high temperatures.https://doi.org/10.1088/1748-9326/ac6435aflatoxinclimate changeUnited States Corn Beltglobal food security |
| spellingShingle | Jina Yu David A Hennessy Jesse Tack Felicia Wu Climate change will increase aflatoxin presence in US Corn Environmental Research Letters aflatoxin climate change United States Corn Belt global food security |
| title | Climate change will increase aflatoxin presence in US Corn |
| title_full | Climate change will increase aflatoxin presence in US Corn |
| title_fullStr | Climate change will increase aflatoxin presence in US Corn |
| title_full_unstemmed | Climate change will increase aflatoxin presence in US Corn |
| title_short | Climate change will increase aflatoxin presence in US Corn |
| title_sort | climate change will increase aflatoxin presence in us corn |
| topic | aflatoxin climate change United States Corn Belt global food security |
| url | https://doi.org/10.1088/1748-9326/ac6435 |
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