Jérôme Rousselet - Academia.edu (original) (raw)

Papers by Jérôme Rousselet

HAL (Le Centre pour la Communication Scientifique Directe), 2015

HAL (Le Centre pour la Communication Scientifique Directe), Sep 14, 2016

HAL (Le Centre pour la Communication Scientifique Directe), Sep 11, 2017

HAL (Le Centre pour la Communication Scientifique Directe), Dec 6, 2018

HAL (Le Centre pour la Communication Scientifique Directe), Mar 20, 2019

HAL (Le Centre pour la Communication Scientifique Directe), 2015

HAL (Le Centre pour la Communication Scientifique Directe), Jan 12, 2021

HAL (Le Centre pour la Communication Scientifique Directe), Sep 4, 2001

HAL (Le Centre pour la Communication Scientifique Directe), Aug 25, 1996

HAL (Le Centre pour la Communication Scientifique Directe), Jan 8, 2013

Reference herein to any specific commercial products, process, or service by trade name, trademar... more Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favoring by the United States Government. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government, and shall not be used for advertising or product endorsement purposes. EEO Statement The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.

Red-banded needle blight of pines caused by the North American pathogens Dothistroma spp. has bee... more Red-banded needle blight of pines caused by the North American pathogens Dothistroma spp. has been devastating to radiata pine plantations in the Southern Hemisphere. However, the same pathogens are relatively benign in their North American ranges, where they infect a number of North American pines. This divergent response might indicate that some biotic or abiotic factor within the environment checks severity of infection across the native range of both the pines and their pathogens. In classical applications of biological control methods, the best source of biocontrol agents might be found within the natural range of the pathogen. Co-occurring communities of endophytic fungi found in pines within the native range of the pathogen provide a reservoir of potential biocontrol organisms. Seven single-endophyte treatments were applied to emerging needles of 7-year-old trees of Pinus ponderosa infected with red-banded needle blight. Penicillium goetzii isolated as an endophyte from root tissues of Pinus ponderosa reduced lesion extent by 7% on inoculated needles compared to untreated needles on Dothistroma-infected needles of P. ponderosa. Results from this study indicate that co-occurring endophytes present a potentially valuable tool for classical biocontrol of Dothistroma needle blight in intensive exotic pine plantations in the Southern Hemisphere and beyond. Natural enemy recruitment to the Asian chestnut gall wasp, Dryocosmus kuriphilus, a highly invasive pest of chestnut, Castanea spp., worldwide. Rieske-Kinney, L.

HAL (Le Centre pour la Communication Scientifique Directe), Oct 6, 2021

HAL (Le Centre pour la Communication Scientifique Directe), Jul 2, 2018

International audienceIn the last decades, population genetics has proved to be a powerful tool t... more International audienceIn the last decades, population genetics has proved to be a powerful tool to study differentiation and divergence of species at different spatial and temporal scales. Classical molecular markers, mostly mitochondrial sequences and microsatellite loci, were successfully used to characterize the natural structure of populations, to identify the environmental factors favouring or impeding gene flow, and to understand the driving forces of genetic differentiation. In the context of current global changes, population genetics was also used to disentangle the demographic processes during invasions and expansions and to characterize dispersion patterns. These approaches have often highlighted the complexity and the sometimes counterintuitive nature of the on-going scenarios. The development of new model-based methods, such as approximate Bayesian computation (ABC), allows quantitative inferences and the explicit comparison of alternative scenarios. The recent advent of Next Generation Sequencing (NGS) technologies has revolutionized the field of population genetics, and now allows the development of genome-wide approaches even in non-model organisms. These major improvements provide most powerful tools to analyse the evolution of both neutral and adaptive genetic diversity. Taking the pine processionary moth as a case example, we will illustrate how population genetics and genomics can be used in forest entomology and bring valuable answers regarding invasion and expansion processes. In particular, we could identify signs of both diffusive dispersal and long-range movements during the expansion of this species in France, which suggests man-aided movements possibly linked to host plant trade. We will also show how genomic markers (RAD-seq) were developed and allowed to deeply explore a case of recent allochronic differentiation in Portugal, which resulted in the occurrence of a phenologically-shifted and highly divergent population for which specific management strategies must be applied

Biological Invasions

Identifying the invasion routes of non-native species is crucial to understanding invasions and c... more Identifying the invasion routes of non-native species is crucial to understanding invasions and customizing management strategies. The box tree moth, Cydalima perspectalis, is native to Asia and was recently accidentally introduced into Europe as a result of the ornamental plant trade. Over the last 15 years, it has spread across the continent and has reached the Caucasus and Iran. It is threatening Buxus trees in both urban areas and forests. To investigate the species’ invasion routes, native and invasive box tree moth populations were sampled, and moth’s genetic diversity and structure were compared using microsatellite markers. Our approximate Bayesian computation analyses strongly suggest that invasion pathways were complex. Primary introductions originating from eastern China probably occurred independently twice in Germany and once in the Netherlands. There were also possibly bridgehead effects, where at least three invasive populations may have served as sources for other in...

HAL (Le Centre pour la Communication Scientifique Directe), Mar 1, 2022

L’evolution recente de l’aire de la processionnaire vers le nord, vers l’est et en altitude depui... more L’evolution recente de l’aire de la processionnaire vers le nord, vers l’est et en altitude depuis plusieurs annees, est clairement correlee a l’elevation constatee des temperatures en particulier en hiver. Elle va donc continuer a progresser. Il est possible de lutter ponctuellement contre la chenille avec des methodes relativement respectueuses de l’environnement. A moyen terme, on evitera dans les zones de presence actuelles ou futures de planter des pins attractifs pour l’insecte en zone frequentee par l’homme, et de constituer des boisements de pins qui soient attractifs le moins longtemps possible pour l’insecte en evitant les trop faibles densites ou en les protegeant par une lisiere feuillue.

2016 International Congress of Entomology, 2016

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Distributed under a Creative Commons Attribution-ShareAlike| 4.0 International License

Urban Forestry & Urban Greening, 2016

HIGHLIGHTS  The pine processionary moth, an urticating forest defoliator insect, is widely distr... more HIGHLIGHTS  The pine processionary moth, an urticating forest defoliator insect, is widely distributed in association to various conifer species in the city of Orléans (France)  The spatial distribution of the insect is patchy with areas of high level of infestation  Pinus nigra, P. pinaster and P. sylvestris are the most attacked tree species  Trees used for ornamental purposes may be selected amongst species rarely attacked by the insect Abstract (297/300 words) There is a growing recognition that urban trees provide various valuable benefits and services such as enhanced human wellbeing. However, they also have a cost in terms of public health either directly (allergies) or by harboring species representing health risk for humans. This paper focuses on such a forest insect species, the pine processionary moth Thaumetopoea pityocampa. Its caterpillars develop gregariously during winter in a conspicuous silk nest in coniferous hosts. When disturbed, the larvae release urticating hairs that cause human or animal serious health problems. The purpose of our survey was to (1) inventory all individual trees belonging to potential host species and estimate the density of T. pityocampa (2) assess the spatial pattern of the insect population at the city scale. We conducted an exhaustive inventory of potential coniferous host trees in five municipalities (ca. 5000 ha) in the north of Orléans, France. Each tree was identified, geo-referenced and the number of moth nests it hosted was counted. A total of 9321 urban trees representing 11 coniferous taxonomic units were investigated. The distribution of T. pityocampa exhibited a marked spatial structure citywide. Geostatistics allowed to draw risk maps revealing strong patchiness. We provide the first estimate of T. pityocampa host tree preference in an urban context and found that Pinus nigra, P. pinaster and P. sylvestris were the most attacked trees. We also report numerous cases of T. pityocampa occurrence on the exotic ornamental Himalayan cedar Cedrus deodara. The management implications of our findings are twofold: (1) risk maps constitute a useful framework for communication and public information, and can help developing control strategies; (2) some species frequently used for ornamental purposes are poor quality hosts regarding T. pityocampa and should therefore be preferred in public place usually frequented by vulnerable people (schools, nurseries, hospitals).