Architecture of an Antagonistic Tree/Fungus Network: The Asymmetric Influence of Past Evolutionary History

Compartmentalization and nestedness are common patterns in ecological networks. The aim of this study was to elucidate some of the processes shaping these patterns in a well resolved network of host/pathogen interactions.Based on a long-term (1972-2005) survey of forest health at the regional scale (all French forests; 15 million ha), we uncovered an almost fully connected network of 51 tree taxa and 157 parasitic fungal species. Our analyses revealed that the compartmentalization of the network maps out the ancient evolutionary history of seed plants, but not the ancient evolutionary history of fungal species. The very early divergence of the major fungal phyla may account for this asymmetric influence of past evolutionary history. Unlike compartmentalization, nestedness did not reflect any consistent phylogenetic signal. Instead, it seemed to reflect the ecological features of the current species, such as the relative abundance of tree species and the life-history strategies of fungal pathogens. We discussed how the evolution of host range in fungal species may account for the observed nested patterns.Overall, our analyses emphasized how the current complexity of ecological networks results from the diversification of the species and their interactions over evolutionary times. They confirmed that the current architecture of ecological networks is not only dependent on recent ecological processes

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NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocNANCY1-Bib. numérique (543959902) / SudocSudocFranceF

LE MYTHE DE LA PETITE SOURIS

NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Système A.R.T. (Atraumatic Restorative Treatment) (un nouveau système thérapeutique de restauration atraumatique pour la carie dentaire)

NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

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NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Enquête bucco-dentaire réalisée au cours du bilan des enfants de 4 ans de la P.M.I. de Moselle

NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Obésité de l'enfant et de l'adolescent (conséquences en odontologie pédiatrique)

NANCY1-SCD Pharmacie-Odontologie (543952101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

L'ANXIETE DE L'ENFANT AU CABINET DENTAIRE (EVALUATION PAR LE DESSIN)

LYON1-BU Santé Odontologie (693882213) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

SCELLEMENT DES SILLONS DES DENTS DE 6 ANS. BILAN DE L'ACTION DES CAISSES PRIMAIRES D'ASSURANCE MALADIE DE VANNES, SELESTAT ET HAGUENAU (1995-1996)

LYON1-BU Santé Odontologie (693882213) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF