Understanding the joint evolution of dispersal and host specialisation using phytophagous arthropods as a model group

Ravigné Virginie, Rodrigues Leonor R., Charlery De La Masseliere Maud, Facon Benoît, Kuczyński Lechosław, Radwan Jacek, Skoracka Anna, Magalhães Sara. 2024. Understanding the joint evolution of dispersal and host specialisation using phytophagous arthropods as a model group. Biological Reviews - Cambridge Philosophical Society, 99 : 219-237.

Résumé : Theory generally predicts that host specialisation and dispersal should evolve jointly. Indeed, many models predict that specialists should be poor dispersers to avoid landing on unsuitable hosts while generalists will have high dispersal abilities. Phytophagous arthropods are an excellent group to test this prediction, given extensive variation in their host range and dispersal abilities. Here, we explore the degree to which the empirical literature on this group is in accordance with theoretical predictions. We first briefly outline the theoretical reasons to expect such a correlation. We then report empirical studies that measured both dispersal and the degree of specialisation in phytophagous arthropods. We find a correlation between dispersal and levels of specialisation in some studies, but with wide variation in this result. We then review theoretical attributes of species and environment that may blur this correlation, namely environmental grain, temporal heterogeneity, habitat selection, genetic architecture, and coevolution between plants and herbivores. We argue that theoretical models fail to account for important aspects, such as phenotypic plasticity and the impact of selective forces stemming from other biotic interactions, on both dispersal and specialisation. Next, we review empirical caveats in the study of this interplay. We find that studies use different measures of both dispersal and specialisation, hampering comparisons. Moreover, several studies do not provide independent measures of these two traits. Finally, variation in these traits may occur at scales that are not being considered. We conclude that this correlation is likely not to be expected from large-scale comparative analyses as it is highly context dependent and should not be considered in isolation from the factors that modulate it, such as environmental scale and heterogeneity, intrinsic traits or biotic interactions. A stronger crosstalk between theoretical and empirical studies is needed to understand better the prevalence and basis of the correlation between dispersal and specialisation.

Mots-clés Agrovoc : évolution, relation hôte parasite, plasticité phénotypique, Arthropoda, distribution géographique

Mots-clés libres : Adaptation, Syndromes, Life-history strategies, Comparative analyses, Theoretical ecology, Host range, Experimental evolution, Biological syndromes, Local adaptation, Joint evolution, Theory

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Ravigné Virginie, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0002-4252-2574
• Rodrigues Leonor R., Université de Lisbonne (PRT)
• Charlery De La Masseliere Maud, Université de Lisbonne (PRT)
• Facon Benoît, INRAE (FRA)
• Kuczyński Lechosław, Adam Mickiewicz University (POL)
• Radwan Jacek, Adam Mickiewicz University (POL)
• Skoracka Anna, Adam Mickiewicz University (POL)
• Magalhães Sara, Université de Lisbonne (PRT) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/607268/)

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