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Jego L, Li R, Roudine S, Ma CS, Le Lann C, Ma G, van Baaren J. Parasitoid ecology along geographic gradients: lessons for climate change studies. CURRENT OPINION IN INSECT SCIENCE 2023; 57:101036. [PMID: 37061184 DOI: 10.1016/j.cois.2023.101036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 05/20/2023]
Abstract
One method to study the impact of climate change on host-parasitoid relationships is to compare populations along geographical gradients in latitude, altitude, or longitude. Indeed, temperatures, which vary along geographic gradients, directly shape the life traits of parasitoids and indirectly shift their populations through trophic interactions with hosts and plants. We explored the pros and cons of using these comparisons along gradients. We highlighted that the longitudinal gradients, although understudied, are well correlated to winter warming and summer heat waves and we draw attention to the impact of the increase in extreme events, which will probably be the determining parameters of the effect of climate change on host-parasitoid relationships.
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Affiliation(s)
- Lena Jego
- UMR-CNRS 6553 ECOBIO, Université de Rennes, Campus de Beaulieu, Avenue du Gal Leclerc, 35042 Rennes cedex, France
| | - Ruining Li
- UMR-CNRS 6553 ECOBIO, Université de Rennes, Campus de Beaulieu, Avenue du Gal Leclerc, 35042 Rennes cedex, France; Climate Change Biology Research Group, State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; School of Life Science, Institutes of Life Science and Green Development, Hebei University, 071002 Baoding, China
| | - Sacha Roudine
- UMR-CNRS 6553 ECOBIO, Université de Rennes, Campus de Beaulieu, Avenue du Gal Leclerc, 35042 Rennes cedex, France
| | - Chun-Sen Ma
- Climate Change Biology Research Group, State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193 Beijing, China; School of Life Science, Institutes of Life Science and Green Development, Hebei University, 071002 Baoding, China
| | - Cécile Le Lann
- UMR-CNRS 6553 ECOBIO, Université de Rennes, Campus de Beaulieu, Avenue du Gal Leclerc, 35042 Rennes cedex, France
| | - Gang Ma
- Climate Change Biology Research Group, State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193 Beijing, China
| | - Joan van Baaren
- UMR-CNRS 6553 ECOBIO, Université de Rennes, Campus de Beaulieu, Avenue du Gal Leclerc, 35042 Rennes cedex, France.
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Benoist R, Paquet S, Decourcelle F, Guez J, Jeannette R, Calatayud PA, Le Ru B, Mougel F, Kaiser L. Role of egg-laying behavior, virulence and local adaptation in a parasitoid's chances of reproducing in a new host. JOURNAL OF INSECT PHYSIOLOGY 2020; 120:103987. [PMID: 31785239 DOI: 10.1016/j.jinsphys.2019.103987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
Understanding the ability of parasitoid insects to succeed in new host populations is a relevant question for biological control and adaptive mechanisms. Cotesia typhae is an African parasitoid specialized on the moth Sesamiae nonagrioides, also called the Mediterranean corn borer. Two Kenyan strains of C. typhae differ in their virulence against a new host population from France. We explored behavioral and physiological hypotheses about this differentiation. Cotesia genus belongs to a group of Hymenoptera in which females inject a domesticated virus in their host to overcome its resistance. Since viral particles are injected along with eggs and since the strain with the higher virulence injects more eggs, we hypothesized that virulence could be explained by the quantity of virus injected. To test this assumption, we measured the injected quantities of eggs and viral particles (estimated by viral DNA segments) of each parasitoid strain along several ovipositions, to vary these quantities. Unexpectedly, results showed that virulence against the French host was not correlated to the injected quantities of eggs or viral segments, indicating that virulence differentiation is explained by other causes. The virulence against the respective natural hosts of the two C. typhae strains was also measured, and results suggest that local adaptation to a more resistant natural host may explain the pre-adaptation of one strain to the new host population. We also identified a differentiation of oviposition strategy and subsequent offspring number between the parasitoid strains, which is important in a biocontrol perspective.
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Affiliation(s)
- R Benoist
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - S Paquet
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - F Decourcelle
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - J Guez
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - R Jeannette
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - P-A Calatayud
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France; icipe: International Center of Insect Physiology and Ecology, Duduville Campus, Kasarani, P. O. Box 30772-00100, Nairobi, Kenya
| | - B Le Ru
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - F Mougel
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
| | - L Kaiser
- Laboratory: Evolution, Génomes, Comportement et Ecologie (CNRS, IRD, Université Paris Sud, Université Paris-Saclay), Campus CNRS, Bat. 13, 12 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
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