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Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate

BACKGROUND: Climate warming presents physiological challenges to insects, manifesting as loss of key life‐history fitness traits and survival. For interacting host–parasitoid species, physiological responses to heat stress may vary, thereby potentially uncoupling trophic ecological relationships. He...

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Autores principales: Mutamiswa, Reyard, Chikowore, Gerald, Nyamukondiwa, Casper, Mudereri, Bester Tawona, Khan, Zeyaur Rahman, Chidawanyika, Frank
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Ltd. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9796525/
https://www.ncbi.nlm.nih.gov/pubmed/35775140
http://dx.doi.org/10.1002/ps.7062
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author Mutamiswa, Reyard
Chikowore, Gerald
Nyamukondiwa, Casper
Mudereri, Bester Tawona
Khan, Zeyaur Rahman
Chidawanyika, Frank
author_facet Mutamiswa, Reyard
Chikowore, Gerald
Nyamukondiwa, Casper
Mudereri, Bester Tawona
Khan, Zeyaur Rahman
Chidawanyika, Frank
author_sort Mutamiswa, Reyard
collection PubMed
description BACKGROUND: Climate warming presents physiological challenges to insects, manifesting as loss of key life‐history fitness traits and survival. For interacting host–parasitoid species, physiological responses to heat stress may vary, thereby potentially uncoupling trophic ecological relationships. Here, we assessed heat tolerance traits and sensitivity to prevailing and future maximum temperatures for the cereal stemborer pests, Chilo partellus, Busseola fusca and Sesamia calamistis and their endo‐parasitoids, Cotesia sesamiae and Cotesia flavipes. We further used the machine learning algorithm, Maximum Entropy (MaxEnt), to model current and potential distribution of these species. RESULTS: The mean critical thermal maxima (CT (max)) ranged from 39.5 ± 0.9°C to 44.6 ± 0.6°C and from 46.8 ± 0.7°C to 48.5 ± 0.9°C for parasitoids and stemborers, with C. sesamiae and Ch. partellus exhibiting the lowest and highest CT (max) respectively. From the current climate to the 2050s scenario, parasitoids recorded a significant reduction in warming tolerance compared with their hosts. Habitat suitability for all stemborer–parasitoid species was spatially heterogeneous under current and future climatic scenarios. Cotesia sesamiae C. flavipes and B. fusca exhibited significant habitat loss, whereas Ch. partellus and S. calamistis showed a significant habitat gain under future 2050s predictions. Model metrics based on mean area under the curve ranged from 0.72 to 0.84 for all species, indicating a good predictive performance of the models. CONCLUSION: These results suggest C. sesamiae and C. flavipes may face survival constraints or extirpation compared with their pest hosts when environmental temperature reaches their upper thermal limits earlier, likely reducing pest regulation through density‐mediated effects. The results demonstrate potential destabilization of stemborer–parasitoid trophic systems potentially compromising biocontrol efficacy under climate warming. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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spelling pubmed-97965252022-12-30 Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate Mutamiswa, Reyard Chikowore, Gerald Nyamukondiwa, Casper Mudereri, Bester Tawona Khan, Zeyaur Rahman Chidawanyika, Frank Pest Manag Sci Research Articles BACKGROUND: Climate warming presents physiological challenges to insects, manifesting as loss of key life‐history fitness traits and survival. For interacting host–parasitoid species, physiological responses to heat stress may vary, thereby potentially uncoupling trophic ecological relationships. Here, we assessed heat tolerance traits and sensitivity to prevailing and future maximum temperatures for the cereal stemborer pests, Chilo partellus, Busseola fusca and Sesamia calamistis and their endo‐parasitoids, Cotesia sesamiae and Cotesia flavipes. We further used the machine learning algorithm, Maximum Entropy (MaxEnt), to model current and potential distribution of these species. RESULTS: The mean critical thermal maxima (CT (max)) ranged from 39.5 ± 0.9°C to 44.6 ± 0.6°C and from 46.8 ± 0.7°C to 48.5 ± 0.9°C for parasitoids and stemborers, with C. sesamiae and Ch. partellus exhibiting the lowest and highest CT (max) respectively. From the current climate to the 2050s scenario, parasitoids recorded a significant reduction in warming tolerance compared with their hosts. Habitat suitability for all stemborer–parasitoid species was spatially heterogeneous under current and future climatic scenarios. Cotesia sesamiae C. flavipes and B. fusca exhibited significant habitat loss, whereas Ch. partellus and S. calamistis showed a significant habitat gain under future 2050s predictions. Model metrics based on mean area under the curve ranged from 0.72 to 0.84 for all species, indicating a good predictive performance of the models. CONCLUSION: These results suggest C. sesamiae and C. flavipes may face survival constraints or extirpation compared with their pest hosts when environmental temperature reaches their upper thermal limits earlier, likely reducing pest regulation through density‐mediated effects. The results demonstrate potential destabilization of stemborer–parasitoid trophic systems potentially compromising biocontrol efficacy under climate warming. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. John Wiley & Sons, Ltd. 2022-07-18 2022-11 /pmc/articles/PMC9796525/ /pubmed/35775140 http://dx.doi.org/10.1002/ps.7062 Text en © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Articles
Mutamiswa, Reyard
Chikowore, Gerald
Nyamukondiwa, Casper
Mudereri, Bester Tawona
Khan, Zeyaur Rahman
Chidawanyika, Frank
Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title_full Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title_fullStr Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title_full_unstemmed Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title_short Biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
title_sort biogeography of cereal stemborers and their natural enemies: forecasting pest management efficacy under changing climate
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9796525/
https://www.ncbi.nlm.nih.gov/pubmed/35775140
http://dx.doi.org/10.1002/ps.7062
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