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Publications
Publications (194)
Xylosandrus crassiusculus, a fungus-farming wood borer native to Southeastern Asia, is the most rapidly spreading invasive ambrosia species worldwide. Previous studies focusing on its genetic structure suggested the existence of cryptic genetic variation in this species. Yet, these studies used different genetic markers, focused on different geogra...
Native to Southeastern Asia, the ambrosia beetle Xylosandrus compactus is invasive worldwide. Its invasion is favoured by its cryptic lifestyle, symbiosis with a fungus that facilitates a broad range of host plants, and predominant sib-mating reproduction. X. compactus invaded Africa more than a century ago and the Americas and Pacific Islands in t...
Climate change affects the life cycle of many species. Yet, responses to yearly variation of weather can either help species track optimal conditions or be maladaptive. We analysed phenological data of 46,479 pine processionary moths (Thaumetopoea pityocampa) during 15 years along an altitudinal gradient in southern France. These larvae were sample...
Two coding-complete nucleotide sequences of a partitivirus (family Partitiviridae ) were discovered in transcriptomic data sets obtained from eggs of the Lepidoptera Thaumetopoea pityocampa . Each segment encodes a single open reading frame, and these two segments are predicted to encode an RNA-dependent RNA polymerase and a coat protein, respectiv...
The current climate change has marked impacts on the phenology of species, i.e. the timing of the various stages of their life cycle. Yet, to fully understand how phenological patterns can be modified according to changes in temperature regimes, it is of prime importance to rely on high quality historical data. Here, we propose a very valuable data...
Xylosandrus compactus and X. crassiusculus are two polyphagous ambrosia beetles originating from Asia and invasive in circumtropical regions worldwide. Both species were recently reported in Italy and further invaded several other European countries in the following years. We used the MaxEnt algorithm to estimate the suitable areas worldwide for bo...
The coding-complete genome sequences of an iteradensovirus (family Parvoviridae ) and an alphapermutotetra-like virus (family Permutotetraviridae ) were discovered from transcriptomic data sets obtained from Thaumetopoea pityocampa larvae collected in Portugal. Each of the coding-complete genome sequences of these viruses contains three main open r...
To investigate enemy pressure across the range of the pine processionary moth (Thaumetopoea pityocampa, Den. & Schiff.) as it spreads northwards in Europe because of climate change, a survey of 206 egg batches from historical and newly colonized areas at both the westernmost and the easternmost ends of the front was carried out in 2016–2018. Out of...
Predicting shifts in the distribution and abundance of pest organisms relies on an accurate forecasting of their response to climate change. The oak processionary moth (OPM) Thaumetopoea processionea causes serious damages to oak trees in forest, urban and other landscapes as well as severe allergic reactions to humans and animals. In the 1990’s an...
Speciation is nowadays recognized as a dynamic process in which the respective roles of forces driving ecological differentiation and reproductive isolation can change through time and space. Incipient speciation events are particularly useful to follow such processes that are not tractable when considering well-differentiated taxa. A promising cas...
Contact zones occur at the crossroad between specific dispersal routes and are facilitated by biogeographic discontinuities. Here, we focused on two Lepidoptera sister species that come in contact near the Turkish Straits System (TSS). We aimed to infer their phylogeographic histories in the Eastern Mediterranean and finely analyze their co-occurre...
The pine processionary moth Thaumetopoea pityocampa – T. wilkinsoni is one of the main defoliators of pine and cedar forests in the Mediterranean area. Its distribution is currently expanding northward and to higher altitudes due to climate warming. This species is associated with a rich community of predators and parasitoids. The specialist egg pa...
In the Mediterranean and temperate regions, an increase in the frequency and intensity of drought events has been recorded, probably due to climate change. In consequence, trees will more frequently experience hydric stress, a condition that can be expected to affect insect–tree interactions, while adaptation mechanisms may be further in course. Th...
Using data from RNAseq studies, we have established a catalog of viruses being associated to Lepidoptera that will help us to study viral communities ("virome").We have characterized a large variety of viruses in terms of size and families from expression data.
Our next aim is to validate the presence of these viruses from various natural populatio...
Thaumetopoea wilkinsoni Tams, 1924 occurs in the southeast Mediterranean basin and infests pine and cedar stands. Our objective was to decipher the biogeography of the species and, in particular, to explore its evolutionary history on the island of Crete. We collected 135 individuals from 14 sites on Crete, Turkey, Samos and Rhodes. We sequenced on...
We present a draft genome assembly with a de novo prediction and automated functional annotation of coding genes, and a reference transcriptome of the Adzuki bean borer, Ostrinia scapulalis, based on RNA sequencing of various tissues and developmental stages. The genome assembly spans 419 Mb, has a GC content of 37.4% and includes 26,120 predicted...
The pine processionary moth Thaumetopoea pityocampa (Lepidoptera: Notodontidae) is the main pine defoliator in the Mediterranean region. Its urticating larvae cause severe human and animal health concerns in the invaded areas. This species shows a high phenotypic variability for various traits, such as phenology, fecundity, and tolerance to extreme...
Understanding the processes of adaptive divergence, which may ultimately lead to speciation, is a major question in evolutionary biology. Allochronic differentiation refers to a particular situation where gene flow is primarily impeded by temporal isolation between early and late reproducers. This process has been suggested to occur in a large arra...
Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera: Notodontidae) is harmful to conifer trees because of defoliation and to public health because of the release of urticating setae from the caterpillars. Contact with setae by humans and domestic animals induces dermatitis, usually localized to the exposed areas. Recent studies demonstrat...
The winter pine processionary moth complex includes some major defoliating insects of Pinus and Cedrus forests in southern Europe and the Mediterranean Basin, where they also cause health problems to humans and animals. The complex includes at least two species that were separated recently based on molecular and morphological evidence: Thaumetopoea...
Extreme climate events such as heat waves are predicted to become more frequent with climate change, representing a challenge for many organisms. The pine processionary moth Thaumetopoea pityocampa is a Mediterranean pine defoliator, which typically lays eggs during the summer. We evaluated the effects of heat waves on egg mortality of three popula...
Divergence between populations sharing the same habitat can be initiated by different
reproductive times, leading to allochronic differentiation. A spatially localised allochronic
summer population (SP) of the pine processionary moth Thaumetopoea pityocampa, recently
discovered in Portugal, occurs in sympatry with the local winter population (WP)....
Allochronic speciation occurs when sympatric populations sharing similar feeding regimes diverge because they mate at different times. Such speciation mode is fascinating because it permits the study of subsequent adaptations and/or geographic range shifts undergone by the populations that face new ecological constraints. Moreover, exploring whethe...
ggene was designed to provide a variety of tools allowing to analyse microsatellite data recorded for geolocated individuals. The package largely relies on geostatistics. Amongst the numerous textbooks dedicated to geostatistical analysis, readers are referrred to Goovaerts (1997) and Isaaks and Srivastava (1989). Diggle and Ribeiro (2007) offer a...
Divergence between populations sharing the same habitat can be initiated by different reproductive times,
leading to allochronic differentiation. A spatially localized allochronic summer population (SP) of the pine
processionary moth Thaumetopoea pityocampa, recently discovered in Portugal, occurs in sympatry with the local
winter population (WP)....
Figure S1. Clade‐specific primer map.
Figure S2. Maximum likelihood consensus tree of the tRNALeu‐cox2 haplotypes found in this study (648 bp long, P and E stand for pityocampa and ENA clades, respectively).
Table S1. Fct values for the different number of groups (K) of population inferred by SAMOVA algorithm on the whole mtDNA dataset.
Table S2. Total number of alleles per locus and average null alleles percentage (%NA) per locus.
The pine processionary moth (Thaumetopoea pityocampa) is an important pest of coniferous forests at the southern edge of its range in Maghreb. Based on mitochondrial markers, a strong genetic differentiation was previously found in this species between western (pityocampa clade) and eastern Maghreb populations (ENA clade), with the contact zone bet...
Phenology allows organisms to overcome seasonally variable conditions through life cycle adjustment. Changes in phenology can drastically modify the evolutionary trajectory of a population, while a shift in the reproductive time may cause allochronic differentiation. The hypothesis of heritable reproductive time was experimentally tested, by studyi...
We recently showed that ranges of the two species of the pine processionary moth complex, Thaumetopoea pityocampa (Dennis & Schiffermüller) and T. wilkinsoni Tams (Lepidoptera: Notodontidae), two dangerous and allergic forest pests in the Mediterranean Basin, contact in Turkey and few individuals bearing molecular evidences of a possible hybridizat...
We recently showed that ranges of the two species of the pine processionary moth complex, Thaumetopoea pityocampa (Dennis & Schiffermüller) and T. wilkinsoni Tams (Lepidoptera: Notodontidae), two dangerous and allergic forest pests in the Mediterranean Basin, contact in Turkey and few individuals bearing molecular evidences of a possible hybridizat...
This chapter presents the evolutionary history of Thaumetopoea species associated with pines, at different temporal and spatial scales. It corresponds to recent discoveries and ongoing works using sequencing technologies and population genetics. Most of the subchapters focus on the winter pine processionary moths T. pityocampa/T. wilkinsoni includi...
Seventeen polymorphic microsatellite markers were developed for the pine processionary moth, Thaumetopoea pityocampa and organized in three multiplex. The number of alleles ranged from 1 to 18 and observed heterozygosities from 0.068 to 0.892. Tests of cross-amplifications are also reported, and show that these loci can be used in divergent clades...
The expansion of the pine processionary moth with climate warming is likely to modify the interactions with its associated arthropod and vertebrate communities of parasitoids, predators and competitors. A first section details the response of some egg parasitoids to moth expansion. Then, we investigate how insectivorous vertebrates (specialist bird...
The pine processionary moths, Thaumetopoea pityocampa and T. wilkinsoni are among the most important Mediterranean pine defoliators. Although recent studies suggest that the two species may coexist in Turkey, the relevant literature is lacking precise information on the occurrence and exact distributions of the two species in this country. In parti...
AimThe pine processionary moth (PPM) is a species complex containing two congeneric taxa, namely Thaumetopoea pityocampa and Thaumetopoea wilkinsoni, with a circum-Mediterranean distribution and a strong geographical structure. We developed comparative phylogeographies for two of the main natural enemies of the PPM, the egg parasitoids Baryscapus s...
- contents -
# 4.1. PPM range expansion and expected genetic footprints
# 4.2. Past northward expansion: genetic imprints of a diffusive dispersal
- 4.2.1. A ‘northern purity, southern richness’ pattern within the Spanish-French lineage
- 4.2.2. Genetic signs of diffusive dispersal within the French populations
# 4.3. Current expansion: a combinati...
La partie est intégrée dans le Chapter 4: Genetic diversity and structure at different spatial scales in the Processionary Moths
The expansion of the pine processionary moth with climate warming is likely to modify the interactions with its associated arthropod and vertebrate communities of parasitoids, predators and competitors. A first section details the response of some egg parasitoids to moth expansion. Then, we investigate how insectivorous vertebrates (specialist bird...
La partie est intégrée dans le Chapter 4: Genetic diversity and structure at different spatial scales in the Processionary Moths
La partie est intégrée dans le Chapitre 7: Ecological Responses of Parasitoids, Predators and Associated Insect Communities to the Climate-Driven Expansion of the Pine Processionary Moth
This chapter presents the evolutionary history of Thaumetopoea species associated with pines, at different temporal and spatial scales. It corresponds to recent discoveries and ongoing works using sequencing technologies and population genetics. Most of the subchapters focus on the winter pine processionary moths T. pityocampa/T. wilkinsoni includi...
La partie est intégrée dans le Chapter 4: Genetic diversity and structure at different spatial scales in the Processionary Moths
Bactrocera tau (Walker), a major invasive pest worldwide, was first described in Fujian (China) in 1849 and has dispersed to tropical and subtropical Asia and the South Pacific region. Few data are available on its colonization history and expansion processes. This pilot study attempted to reconstruct the colonization history and pathways of this p...
Deciphering the colonization processes by which introduced pests invade new areas is essential to limit the risk of further expansion and/or multiple introductions. We here studied the invasion history of the maritime pine bast scale Matsucoccus feytaudi. This host-specific insect does not cause any damage in its native area, but it devastated mari...
The pine processionary moth, Thaumetopoea pityocampa, is a Mediterranean insect that typically reproduces in the summer while larvae develop in the winter. A phenologically atypical population, hereafter named "summer population" (SPPM), was detected in 1997 in the region of Leiria, Portugal. For this peculiar population, reproduction occurs in May...
The pine processionary moth Thaumetopoea pityocampa is a Mediterranean lepidopteran defoliator that experiences a rapid range expansion towards higher latitudes and altitudes due to the current climate warming. Its phenology - the time of sexual reproduction - is certainly a key trait for the local adaptation of the processionary moth to climatic c...
Fifteen microsatellite markers were developed for Pissodes validirostris. The number of alleles per locus ranged from 2 to 13 and observed heterozygosity from 0.033 to 0.900. These markers will be useful to confirm the infra-specific phylogeographic patterns of this seed-feeding weevil, potential vector of the pitch canker disease of pine trees, th...
Allochrony that is reproductive isolation by time may further lead to divergence of reproductive adaptive traits in response to different environmental pressures over time. A unique "summer" population of the pine processionary moth Thaumetopoea pityocampa, reproductively isolated from the typical winter populations by allochronic differentiation,...
A case of allochronic differentiation, where genetic isolation is due to a shift in the reproductive period, has been shown recently in the pine processionary moth (PPM; Thaumetopoea pityocampa) in Portugal. The PPM is a Mediterranean Lepidoptera which reproduces in summer and whose larvae develop during winter. A population with a ”shifted” phenol...
Inexpensive short-read sequencing technologies applied to reduced representation genomes is revolutionizing genetic research, especially population genetics analysis, by allowing the genotyping of massive numbers of single-nucleotide polymorphisms (SNP) for large numbers of individuals and populations. Restriction site-associated DNA (RAD) sequenci...
Molecular markers produced by next-generation sequencing (NGS) technologies are revolutionizing genetic research. However, the costs of analysing large numbers of individual genomes remain prohibitive for most population genetics studies. Here, we present results based on mathematical derivations showing that, under many realistic experimental desi...
The genus contains the processionary moths, a group of lepidopteran associated with forest trees, well known for the social behaviour of the larvae and for carrying urticating setae. The taxonomy of the genus is partly unresolved and a phylogenetic approach is lacking. The goal of this work is to produce a phylogeny for and to identify the main tra...
The secondary structure of
rrnL
domain I in Noctuoidea moths.
(PDF)
PCR conditions used to amplify/sequence mitochondrial/nuclear genes.
(PDF)
S2.1-S2.38. ML phylogenetic trees obtained from selected ALNs.
(PDF)
List of traits analyzed in the
Thaumetopoea
genus.
(PDF)
The EC-supported Network of Excellence Evoltree (http://www.evoltree.eu) formed a group of scientists involved in and actively contributing to Jointly Executed Research Activities on community genetics in forest ecosystems. In addition to the main authors, the group includes S. Augu-stin, M. Brandle, C. Burban, J. Burczyk, S. Cavers, I. Chybicki, C...
1 Various factors such as climate and resource availability influence the geographical distributions of organisms. Species sensitive to small temperature variations are known to experience rapid distribution shifts as a result of current global warming, sometimes leading to new threats to agriculture and forests. Tomicus piniperda and Tomicus destr...
Most invasive species established in Europe originate from either Asia or North America, but little is currently known about the potential of the Anatolian Peninsula (Asia Minor) and/or the Near East to constitute invasion sources. Mediterranean forests are generally fragile ecosystems that can be threatened by invasive organisms coming from differ...
