Acclimation effects on thermal locomotor performance of the invasive Polyphagous Shot Hole Borer beetle, Euwallacea fornicatus (Coleoptera: Curculionidae: Scolytinae)

Journal of Thermal Biology, Год журнала: 2025, Номер unknown, С. 104068 - 104068

Опубликована: Фев. 1, 2025

The Polyphagous Shot Hole Borer (PSHB; Euwallacea fornicatus, Coleoptera: Curculionidae: Scolytinae) is an invasive and destructive tree pest. To assess whether thermal acclimation influences E. fornicatus locomotion performance (i.e., induced plastic responses) that may influence invasion potential, beetles were acclimated to three temperatures (18 °C, 25 32 °C), four traits measured across six (13 18 23 28 33 °C 38 °C) per group construct curves, capturing critical minimum (Tmin), maximum (Tmax), breadth (Tbr), optimal rate (Umax). Substantial plasticity of curves was found in fornicatus. Generally, cold increased the range several locomotor without affecting levels, thereby supporting colder-is-better hypothesis. consequences these responses, using established here, movement rates at-risk orchard area South Africa predicted seasons while considering artificial warm spells. Cold-acclimated exhibited highest cumulative distance traveled both summer winter, warm-acclimated had lowest. Therefore, short-term variation significantly influenced performance, with notably improving dispersal a wide conditions. These findings highlight importance recent history when predicting potential. By integrating data microclimatic conditions functional models, this study offers valuable insights for spread, informing targeted management strategies, refining spatially explicit risk assessments mitigate impacts

Язык: Английский

---

The past, the recent, and the ongoing evolutionary processes of the worldwide invasive ascidian Styela plicata

Molecular Ecology, Год журнала: 2024, Номер 33(18)

Опубликована: Авг. 28, 2024

Abstract Invasive species are one of the main threats to global biodiversity and, within marine ecosystems, tunicates feature some prominent examples. Styela plicata is an ascidian inhabiting harbours in all temperate oceans and seas, thus being considered a thriving invasive species. However, this species' adaptive mechanisms, introduction history, population structure have never been completely elucidated. Here, by genotyping 87 S. individuals from 18 localities worldwide with 2b‐RADseq, we confirm presence four chromosome inversions, demonstrate structuring on species, detect local adaptation signals, infer historical demographic events. We show that North Carolina constitute unrelated population, Atlanto‐Mediterranean Pacific form their own genetic clusters substructuring, most evident split between northern southern Atlantic localities. The locality South presents intermediate position other two groups pointing hybrid origin recurrent gene flow. generate test models, providing evidence independent events Pacific, admixture originated Carolina. Finally, identify candidate loci for adaptation, functions involved cell processes, metabolism, development, ion transport, among others. Overall, study highlights complex processes , which led its current distribution, structure, footprint worldwide.

Язык: Английский

---

Monitoring a polyphagous shot hole borer infestation in an urban forest using Google street view in the City of Johannesburg, South Africa

Biological Invasions, Год журнала: 2025, Номер 27(6)

Опубликована: Май 28, 2025

Язык: Английский

---

Pathogenicity of Fusarium euwallaceae, symbiont of the polyphagous shot hole borer beetle, to selected stone fruit trees in South Africa

Journal of Plant Pathology, Год журнала: 2022, Номер 105(1), С. 5 - 13

Опубликована: Ноя. 21, 2022

Язык: Английский

---

The worldwide invasion history of a pest ambrosia beetle inferred using population genomics

Molecular Ecology, Год журнала: 2023, Номер 32(15), С. 4381 - 4400

Опубликована: Май 21, 2023

Abstract 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 existence of cryptic variation in this species. Yet, these used different markers, focused geographical areas and did not include Europe. Our first goal was determine worldwide based both mitochondrial genomic markers. second study X. ' invasion history global level identify origins We COI RAD sequencing design characterize 188 206 specimens worldwide, building comprehensive data set for any beetle date. The results were largely consistent between Two differentiated clusters invasive, albeit regions world. markers inconsistent only few found exclusively Japan. Mainland USA could have acted as source further expansion Canada Argentina through stepping stone bridgehead events. showed that Europe colonized by Cluster II complex including several arrivals from multiple area, possibly United States. also Spain directly Italy intracontinental dispersion. It unclear whether mutually exclusive allopatric distribution two due neutral effects or ecological requirements.

Язык: Английский

---

Fusarium kuroshium is the primary fungal symbiont of an ambrosia beetle, Euwallacea fornicatus, and can kill mango tree in Japan

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Дек. 7, 2023

This study identifies fungi associated with Euwallacea fornicatus and determines whether these fungal species play the role of primary symbiont. E. adults that emerged from branches infested trees in Okinawa main island, Japan, were collected used to isolate fungi. Fusarium kuroshium Penicillium citrinum most dominant associates females males, respectively. F. was much more frequently isolated head, including mycangia (fungus-carrying organs), than any other body parts. We inoculated healthy mango saplings or decemcellulare, both which symbionts infesting trees. decreased leaf stomatal conductance rate xylem sap-conduction area increased length discoloration saplings, thereby weakening killing some. These results suggest kuroshium, a mycangial fungus fornicatus, inhibits water flow is first report causes wilt disease it symbiont fornicatus.

Язык: Английский

---

Chromosome structural rearrangements in invasive haplodiploid ambrosia beetles revealed by the genomes of Euwallacea fornicatus and Euwallacea similis (Coleoptera, Curculionidae, Scolytinae)

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Июнь 29, 2024

Abstract Bark and ambrosia beetles are among the most ecologically economically damaging introduced plant pests worldwide, with life history traits including polyphagy, haplodiploidy, inbreeding polygyny symbiosis fungi contributing to their dispersal impact. Species vary in host tree ecologies, many attacking stressed or recently dead trees, such as globally distributed E. similis (Ferrari). Other species, like Polyphagous Shot Hole Borer (PSHB) Euwallacea fornicatus (Eichhoff), can attack over 680 plants is causing considerable economic damage several countries worldwide. Despite notoriety, publicly accessible genomic resources for Hopkins species scarce, hampering better understanding of invasive capabilities well modern control measures, surveillance management. Using a combination long short read sequencing platforms we assembled annotated high quality (BUSCO > 98% complete) chromosome level genomes these species. Comparative macro-synteny analysis showed an increased number chromosomes haplodiploid compared diploid outbred due fission events. This suggests that impact structure. Further, genome had higher relative proportion repetitive elements, up 17% more, than . Additionally, metagenomic assembly pipelines identified microbiota associated both Fusarium fungal symbionts novel Wolbachia strain. These will contribute how related evolution management pests. Significance Scolytinae significant forestry around world commonly translocated human trade wood products. Life haplodiploidy attributed successful establishment environments. widely attacks wide variety live trees. study reports this for, , which colonises The assemblies presented herein highly complete scaffolded pseudo-chromosomal level. analyses other highlight chromosomal rearrangements between outbreeding scolytinae Higher proportions transposable elements were may promote species’ ability first insects.

Язык: Английский

---

The past, the recent, and the ongoing evolutionary processes of the worldwide invasive ascidian Styela plicata

Authorea (Authorea), Год журнала: 2024, Номер unknown

Опубликована: Авг. 29, 2024

Invasive species are one of the main threats to global biodiversity and, within marine ecosystems, tunicates feature some prominent examples. Styela plicata is an ascidian inhabiting harbors in all temperate oceans and seas, thus being considered a thriving invasive species. However, this species' adaptive mechanisms, introduction history, population structure have never been completely elucidated. Here, by genotyping 87 S. individuals from 18 localities worldwide with 2b-RADseq, we confirm presence four chromosome inversions, demonstrate structuring on species, detect local adaptation signals, infer historical demographic events. The locality North Carolina constitutes utterly unrelated population, Atlanto-Mediterranean Pacific constitute their own genetic clusters, South presents intermediate position between other two groups. For each biogeographic highlight substructuring, most evident split Atlantic+Mediterranean Atlantic localities. We identify genomic drivers for adaptation, functions involved cell processes, metabolism, development, ion transport, among others. model ancient effective sizes, providing evidence three bottlenecks that could correspond different Finally, hybridization tests point having hybrid origin, likely resulting secondary contact populations. Overall, study highlights complex processes plicata, which led its current distribution, structure, footprint worldwide.

Язык: Английский

---

High haplotype diversity and strong phylogeographic structure in the invasive jellyfish Blackfordia virginica population highlight its complex demographic history in Korea

Marine Biodiversity, Год журнала: 2024, Номер 54(5)

Опубликована: Сен. 13, 2024

Язык: Английский

---

Fusarium species associated with Euwallacea xanthopus in South Africa, including two novel species

Mycologia, Год журнала: 2024, Номер unknown, С. 1 - 20

Опубликована: Сен. 26, 2024

Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) are small wood-boring insects that live in an obligate symbiosis with fungi, which serve as their primary food source. Beetles residing the genus

Язык: Английский

---