Joint species distributions reveal the combined effects of host plants, abiotic factors and species competition as drivers of species abundances in fruit flies

Facon Benoît, Hafsi Abir, Charlery De La Masseliere Maud, Robin Stéphane, Massol François, Dubart Maxime, Chiquet Julien, Frago Enric, Chiroleu Frédéric, Duyck Pierre François, Ravigné Virginie. 2021. Joint species distributions reveal the combined effects of host plants, abiotic factors and species competition as drivers of species abundances in fruit flies. Ecology Letters, 24 (9) : 1905-1916.

https://doi.org/10.1111/ele.13825

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Url - jeu de données - Entrepôt autre : http://doi.org/10.5281/zenodo.4569532 / Url - autre : https://doi.org/10.1101/2020.12.07.414326

Quartile : Outlier, Sujet : ECOLOGY

Résumé : The relative importance of ecological factors and species interactions for shaping species distributions is still debated. The realised niches of eight sympatric tephritid fruit flies were inferred from field abundance data using joint species distribution modelling and network inference, on the whole community and separately on three host plant groups. These estimates were then confronted the fundamental niches of seven fly species estimated through laboratory-measured fitnesses on host plants. Species abundances depended on host plants, followed by climatic factors, with a dose of competition between species sharing host plants. The relative importance of these factors mildly changed among the three host plant groups. Despite overlapping fundamental niches, specialists and generalists had almost distinct realised niches, with possible competitive exclusion of generalists by specialists on Cucurbitaceae. They had different assembly rules: Specialists were mainly influenced by their adaptation to host plants, while generalist abundances varied regardless of their fundamental host use.

Mots-clés Agrovoc : écologie animale, Tephritidae, distribution des populations, plante hôte, facteur climatique, compétition interspécifique, facteurs abiotiques, modélisation

Mots-clés complémentaires : Niche écologique

Mots-clés libres : Community ecology, Niche modelling, Performance, Phytophagous insects, Preference, Specialisation

Classification Agris : L20 - Écologie animale
H10 - Ravageurs des plantes
U10 - Informatique, mathématiques et statistiques

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

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