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- Author:
- John F. Gaskin, et al. ; John A. Goolsby; Marie-Claude Bon; Massimo Cristofaro; Paul-André Calatayud; Show all 5 Authors
- Source:
- Invasive plant science and management 2022 v.15 no.2 pp. 67-71
- ISSN:
- 1939-747X
- Subject:
- Megathyrsus maximus; Neotropics; administrative management; biological control; biological control agents; forage grasses; genetic similarity; genotype; invasive species; mites; Cote d'Ivoire; Florida; Kenya; South Africa; Texas; Uganda; Zambia
- Abstract:
- ... Megathyrsus maximus is nonnative in the neotropics, with a tall form that is commonly used as a forage grass and a smaller-statured form that is considered invasive in south Texas, USA. Biological control researchers are challenged to find an agent that will attack the short form, but not the desirable tall form in other parts of the neotropics. We conducted molecular analyses on 155 Megathyrsus m ...
- DOI:
- 10.1017/inp.2022.7
- https://doi.org/10.1017/inp.2022.7
- Author:
- John F. Gaskin, et al. ; Stacy B. Endriss; Christa E. Fettig; Ruth A. Hufbauer; Andrew P. Norton; René F. H. Sforza; Show all 6 Authors
- Source:
- Biological invasions 2021 v.23 no.6 pp. 1901-1914
- ISSN:
- 1387-3547
- Subject:
- Verbascum thapsus; amplified fragment length polymorphism; ecological invasion; gene flow; genetic similarity; genetic variation; genotype; introduced plants; invasive species; outcrossing; population structure; provenance; species diversity; Belgium; Eurasia; Germany; Western United States
- Abstract:
- ... Plant invasions are rarely homogenous. Processes such as selection, drift, gene flow, and founding events can rapidly shape the genetic diversity and spatial population structure of an invasion. We investigated the diversity, origins and population structure of Verbascum thapsus (common mullein), an introduced plant in North America. Despite this species being facultatively outcrossing, we found t ...
- Handle:
- 10113/7389723
- DOI:
- 10.1007/s10530-021-02480-0
- https://doi.org/10.1007/s10530-021-02480-0
- Author:
- John F. Gaskin, et al. ; Jennifer Andreas; Brenda J. Grewell; Patrick Haefliger; Nathan E. Harms; Show all 5 Authors
- Source:
- Aquatic botany 2021 v.173 pp. 103400
- ISSN:
- 0304-3770
- Subject:
- Butomus umbellatus; aquatic plants; asexual reproduction; biological control; botany; genetic variation; genotype; host specificity; invasive species; plant pathogens; ploidy; population structure; Canada; Netherlands
- Abstract:
- ... Flowering rush (Butomus umbellatus) is an invasive aquatic plant in northern USA and southern Canada. To better understand the pattern of invasion in North America and implications for management, we investigated genetic diversity and population structure of the more recent western North American invasion and compared it to the earlier eastern North America invasion using 80 variable AFLP loci. We ...
- Handle:
- 10113/7374969
- DOI:
- 10.1016/j.aquabot.2021.103400
- https://doi.org/10.1016/j.aquabot.2021.103400
- Author:
- John F. Gaskin, et al. ; Soo‐Rang Lee; Young‐Dong Kim; Show all 3 Authors
- Source:
- Journal of systematics and evolution 2019 v.57 no.3 pp. 247-255
- ISSN:
- 1674-4918
- Subject:
- Bayesian theory; Tamarix chinensis; Tamarix ramosissima; genetic variation; genome; genotyping by sequencing; phylogeny; phytogeography; single nucleotide polymorphism; taxonomy; China; Korean Peninsula; Yellow Sea
- Abstract:
- ... The taxonomy and phylogenetic relationships of related taxa are important for understanding the biology of a species. Also, spatial distribution of genetic variation may offer insights into history of range shifts and demographic changes. The genus Tamarix L. from the Old World is a taxonomically challenging group that has widely expanded its range in the recent past. We examined genomic diversity ...
- DOI:
- 10.1111/jse.12432
- https://doi.org/10.1111/jse.12432
5. Geographic and genetic variation in susceptibility of Butomus umbellatus to foliar fungal pathogens
- Author:
- John F. Gaskin, et al. ; Nathan Harms; Judy Shearer; James T. Cronin; Show all 4 Authors
- Source:
- Biological invasions 2020 v.22 no.2 pp. 535-548
- ISSN:
- 1387-3547
- Subject:
- Butomus umbellatus; bioassays; biological control; climatic zones; diploidy; disease incidence; disease resistance; disease susceptibility; ecological invasion; environmental factors; fungal diseases of plants; genetic variation; genotype; genotype-environment interaction; geographical distribution; host plants; host-pathogen relationships; introduced species; pathogenicity; pathogens; plant damage; spatial distribution; surveys; triploidy; weeds; United States
- Abstract:
- ... Large-scale patterns of plant invasions may reflect regional heterogeneity in biotic and abiotic factors and genetic variation within and between invading populations. Having information on how effects of biotic resistance vary spatially can be especially important when implementing biological control because introduced agents may have different impacts through interactions with host-plant genotyp ...
- Handle:
- 10113/6828067
- DOI:
- 10.1007/s10530-019-02109-3
- https://doi.org/10.1007/s10530-019-02109-3
- Author:
- John F. Gaskin, et al. ; Jose L. Villar; M. Ángeles Alonso; Ana Juan; Manuel B. Crespo; Show all 5 Authors
- Source:
- Journal of systematics and evolution 2019 v.57 no.5 pp. 488-507
- ISSN:
- 1674-4918
- Subject:
- Tamarix gallica; Tamarix hispida; Tamarix karelinii; Tamarix parviflora; intergenic DNA; leaves; phylogeny; plant taxonomy; plastid DNA; trees; Africa; Canary Islands; Europe; Middle East
- Abstract:
- ... Tamarix is one of the taxonomically most complex genera among the angiosperms, and there is little consensus regarding its infrageneric classification. Here we present the most complete phylogenetic reconstruction of the genus to date. This includes a DNA phylogenetic tree based on nuclear ribosomal ITS, and a plastid DNA phylogeny based on three intergenic spacers (trnS‐trnG, ndhF‐rpl32, and trnQ ...
- DOI:
- 10.1111/jse.12478
- https://doi.org/10.1111/jse.12478
- Author:
- John F. Gaskin, et al. ; Charles A. Braman; Adam M. Lambert; A. Zeynep Özsoy; Ellen N. Hollstien; Kirsten A. Sheehy; Tara McKinnon; Patrick Moran; John A. Goolsby; Thomas L. Dudley; Show all 10 Authors
- Source:
- Insects 2021 v.12 no.7 pp. -
- ISSN:
- 2075-4450
- Subject:
- Aphytis melinus; Arundo donax; Citrus; Phragmites; adults; biological control; biological control agents; genetic variation; haplotypes; oviposition; parasitism; parasitoids; phenology; phylogeny; univoltine habit; voltinism; watersheds; California
- Abstract:
- ... Arundo donax (giant reed) is invasive in Mediterranean, sub-, and tropical riparian systems worldwide. The armored scale Rhizaspidiotus donacis is approved for biocontrol in North America, but an adventive population was recently discovered in southern California. We documented this population’s distribution, phylogeny, phenology, potential host spillover to Phragmites spp., and potential for para ...
- DOI:
- 10.3390/insects12070588
- https://doi.org/10.3390/insects12070588
- Author:
- John F. Gaskin, et al. ; Aaron C. Rhodes; Robert M. Plowes; John A. Goolsby; Boaz Musyoka; Paul-André Calatayud; Massimo Cristofaro; Eric D. Grahmann; Dino J. Martins; Lawrence E. Gilbert; Show all 10 Authors
- Source:
- Biological invasions 2021 v.23 no.12 pp. 3653-3669
- ISSN:
- 1387-3547
- Subject:
- Megathyrsus maximus; biodiversity; biological control; ecological function; economic valuation; environmental impact; forage production; globalization; invasive species; pastures; perennial grasses; rangelands
- Abstract:
- ... On a global scale, invasive grasses threaten biodiversity and ecosystem function. Nevertheless, the importation of forage grasses is a significant economic force driven by globalization. Pastureland and rangeland are of critical economic and ecological importance, but novel grass species may lead to invasion. Recognizing that economically important species can also be ecologically damaging creates ...
- DOI:
- 10.1007/s10530-021-02607-3
- https://doi.org/10.1007/s10530-021-02607-3
- Author:
- John F. Gaskin, et al. ; Jeffrey L. Littlefield; Show all 2 Author
- Source:
- Invasive plant science and management 2017 v.10 no.2 pp. 119-124
- ISSN:
- 1939-747X
- Subject:
- DNA; Rhaponticum repens; amplified fragment length polymorphism; biological control; genotype; herbicides; invasive species; outcrossing; perennials; plants (botany); rhizomes; seed development; shoots; Montana
- Abstract:
- ... Russian knapweed is an outcrossing perennial invasive weed in North America that can spread by both seed and horizontal rhizomic growth leading to new shoots. The predominant mode of spread at the local scale and dispersal at the long-distance scale informs control but has not been quantitatively researched. We used amplified fragment-length polymorphisms (AFLPs) of DNA collected from 174 shoots i ...
- Author:
- John F. Gaskin, et al. ; Jose A. Andrés; Steven M. Bogdanowicz; Kimberly R. Guilbault; Ruth A. Hufbauer; Urs Schaffner; Philip Weyl; Livy Williams; Show all 8 Authors
- Source:
- Invasive plant science and management 2019 v.12 no.2 pp. 89-96
- ISSN:
- 1939-747X
- Subject:
- Elaeagnus angustifolia; alleles; biological control; biological control agents; chloroplast DNA; efficacy testing; genetic variation; haplotypes; invasive species; loci; microsatellite repeats; monitoring; plants (botany); population genetics; population structure; riparian areas; Western United States
- Abstract:
- ... Invasions can be genetically diverse, and that diversity may have implications for invasion management in terms of resistance or tolerance to control methods. We analyzed the population genetics of Russian-olive (Elaeagnus angustifolia L.), an ecologically important and common invasive tree found in many western U.S. riparian areas. We found three cpDNA haplotypes and, using 11 microsatellite loci ...
- DOI:
- 10.1017/inp.2019.16
- https://doi.org/10.1017/inp.2019.16
- Author:
- John F Gaskin, et al. ; Mark Schwarzländer; Robert D Gibson; Heather Simpson; Diane L Marshall; Esther Gerber; Hariet Hinz; Show all 7 Authors
- Source:
- AoB PLANTS pp. -
- ISSN:
- 2041-2851
- Subject:
- Isatis tinctoria; biological control agents; cultivars; dyes; ecological invasion; genetic variation; humans; invasive species; natural selection; outcrossing; population structure; surveys; Eastern United States; Eurasia; Germany; Switzerland; Ukraine; Western United States
- Abstract:
- ... Population structure and genetic diversity of invasions are the result of evolutionary processes such as natural selection, drift and founding events. Some invasions are also molded by specific human activities such as selection for cultivars and intentional introduction of desired phenotypes, which can lead to low genetic diversity in the resulting invasion. We investigated the population structu ...
- DOI:
- 10.1093/aobpla/ply020
- CHORUS:
- 10.1093/aobpla/ply020
- https://doi.org/10.1093/aobpla/ply020
- Author:
- John F. Gaskin, et al. ; Erin Espeland; Casey D. Johnson; Diane L. Larson; Jane M. Mangold; Rachel A. McGee; Chuck Milner; Shishir Paudel; Dean E. Pearson; Lora B. Perkins; Chadley W. Prosser; Justin B. Runyon; Sharlene E. Sing; Zachary A. Sylvain; Amy J. Symstad; Daniel R. Tekiela; Show all 16 Authors
- Source:
- Rangeland ecology & management 2021 v.78 pp. 235-249
- ISSN:
- 1550-7424
- Subject:
- administrative management; ecology; grasslands; indigenous species; invasive species; rangelands; Saskatchewan; Texas
- Abstract:
- ... The Great Plains of North America encompass approximately 1,300,000 km² of land from Texas to Saskatchewan. The integrity of these lands is under continual assault by long-established and newly-arrived invasive plant species, which can threaten native species and diminish land values and ecological goods and services by degrading desired grassland resources. The Great Plains are a mixture of priva ...
- DOI:
- 10.1016/j.rama.2020.04.003
- https://doi.org/10.1016/j.rama.2020.04.003
- Author:
- John F. Gaskin, et al. ; Monica L. Pokorny; Jane M. Mangold; Show all 3 Authors
- Source:
- Biological invasions 2016 v.18 no.7 pp. 2067-2075
- ISSN:
- 1387-3547
- Subject:
- Bayesian theory; Iris pseudacorus; aquatic plants; biological control; ecological invasion; genetic techniques and protocols; genotype; invasive species; leaves; outcrossing; rhizomes; seed dispersal; United States
- Abstract:
- ... Invasive aquatic plants typically reproduce vegetatively, but there have been conflicting hypotheses of invasive aquatic yellow flag iris dispersing primarily by seed versus rhizome fragmentation. We performed genetic analysis of 20 aquatic yellow flag iris populations across the Pacific Northwest, USA, with leaf tissue taken from plants between 2 and 5 m apart. We found 167 unique genotypes in 17 ...
- Handle:
- 10113/62764
- DOI:
- 10.1007/s10530-016-1151-0
- https://doi.org/10.1007/s10530-016-1151-0
- Author:
- John F. Gaskin, et al. ; Samalesu G. Mayonde; Glynis V. Cron; Marcus J. Byrne; Show all 4 Authors
- Source:
- Biological invasions 2016 v.18 no.12 pp. 3575-3594
- ISSN:
- 1387-3547
- Subject:
- Tamarix; amplified fragment length polymorphism; biological control; genetic variation; genotype; hybridization; hybrids; internal transcribed spacers; introduced species; invasive species; phylogeny; population structure; provenance; transcription (genetics); Eurasia; South Africa; United States
- Abstract:
- ... Hybridization is regarded as a rapid mechanism for increasing genetic variation that can potentially enhance invasiveness. Tamarix hybrids appear to be the dominant genotypes in their invasions. Exotic Tamarix are declared invasive in South Africa and the exotic T. chinensis and T. ramosissima are known to hybridize between themselves, and with the indigenous T. usneoides. However, until now, it w ...
- DOI:
- 10.1007/s10530-016-1249-4
- https://doi.org/10.1007/s10530-016-1249-4
- Author:
- John F. Gaskin, et al. ; Chandra E. Moffat; David J. Ensing; Rosemarie A. De Clerck-Floate; Jason Pither; Show all 5 Authors
- Source:
- American journal of botany 2015 v.102 no.7 pp. 1145-1159
- ISSN:
- 0002-9122
- Subject:
- Hieracium; Pilosella; amplified fragment length polymorphism; biodiversity; ecosystems; genetic variation; interspecific hybridization; introgression; invasive species; morphometry; plant morphology
- Abstract:
- ... • Premise of the study: Accurate assessments of biodiversity are paramount for understanding ecosystem processes and adaptation to change. Invasive species often contribute substantially to local biodiversity; correctly identifying and distinguishing invaders is thus necessary to assess their potential impacts. We compared the reliability of morphology and molecular sequences to discriminate six p ...
- Handle:
- 10113/61246
- DOI:
- 10.3732/ajb.1400466
- https://doi.org/10.3732/ajb.1400466
16. A new species of Kali (Salsoloideae, Chenopodiaceae) from Sicily, supported by molecular analysis
- Author:
- John F. Gaskin, et al. ; Cristian Brullo; Salvatore Brullo; Gianpietro Giusso del Galdo; G. Frederic Hrusa; Cristina Salmeri; Show all 6 Authors
- Source:
- Phytotaxa 2015 v.201 no.4 pp. 256-277
- ISSN:
- 1179-3163
- Subject:
- Salsola; annuals; conservation status; cortex; ecology; introduced plants; leaves; new combination; new species; phytogeography; plant morphology; plant taxonomy; polyphyly; Asia; Europe; North America; Northern Africa; Sicily; South Africa; South Australia
- Abstract:
- ... Nomenclatural and taxonomical considerations on Kali, a controversial genus recently segregated from the polyphyletic Salsola s. l. (Chenopodiaceae), are provided. Morphologically, Kali groups annual plants with leaves ending in a spine and lacking hypodermis, having also a cortex alternate to longitudinal chlorenchymatous striae. The species of this genus mainly have a paleo-temperate distributio ...
- Handle:
- 10113/60535
- DOI:
- 10.11646/phytotaxa.201.4.2
- https://doi.org/10.11646/phytotaxa.201.4.2
- Author:
- John F. Gaskin, et al. ; Adam S. Birken; David J. Cooper; Show all 3 Authors
- Source:
- Biological invasions 2012 v.14 no.3 pp. 693-699
- ISSN:
- 1387-3547
- Subject:
- Tamarix; amplified fragment length polymorphism; ecological invasion; hybridization; hybrids; invasive species; rivers; Utah
- Abstract:
- ... Hybridization is proposed as one process that can enhance a plant species’ invasive ability. We quantified the levels of hybridization of 180 saltcedar plants (Tamarix spp.) of varying ages that span the history of an invasion along the Green River, Utah, USA. Plants ranging in establishment dates from 1930s to 2004 were analyzed using Amplified Fragment Length Polymorphisms. All plants sampled, e ...
- Handle:
- 10113/55119
- DOI:
- 10.1007/s10530-011-0110-z
- https://doi.org/10.1007/s10530-011-0110-z
- Author:
- John F. Gaskin, et al. ; Marianna Szűcs; Mark Schwarzländer; Show all 3 Authors
- Source:
- Biological control 2011 v.58 no.1 pp. 44-52
- ISSN:
- 1049-9644
- Subject:
- weed control; hybrids; amplified fragment length polymorphism; biological control agents; coasts; introgression; introduced species; plant-insect relations; weeds; climatic factors; biological control; Longitarsus jacobaeae; ecological succession; biotypes; Jacobaea vulgaris; California; Italy; Oregon; Switzerland; Montana
- Abstract:
- ... Evaluation of past and current biological control programs using molecular tools can clarify establishment success of agent biotypes, and can contribute to our understanding of best practice for natural enemy importations. The flea beetle, Longitarsus jacobaeae Waterhouse (Coleoptera: Chrysomelidae) has successfully controlled the weed tansy ragwort, Jacobaea vulgaris Gaertn., in Pacific coastal a ...
- Handle:
- 10113/50278
- DOI:
- 10.1016/j.biocontrol.2011.03.010
- https://doi.org/10.1016/j.biocontrol.2011.03.010
- Author:
- John F. Gaskin, et al. ; Wyatt I. Williams; Jonathan M. Friedman; Andrew P. Norton; Show all 4 Authors
- Source:
- Evolutionary Applications 2014 v.7 no.3 pp. 381-393
- ISSN:
- 1752-4571
- Subject:
- Tamarix ramosissima; biological control; biological control agents; defoliation; evolution; genetic variation; insects; introduced species; introgression; invasive species; latitude; natural enemies; roots; Western United States
- Abstract:
- ... Evolution has contributed to the successful invasion of exotic plant species in their introduced ranges, but how evolution affects particular control strategies is still under evaluation. For instance, classical biological control, a common strategy involving the utilization of highly specific natural enemies to control exotic pests, may be negatively affected by host hybridization because of shif ...
- Handle:
- 10113/58596
- DOI:
- 10.1111/eva.12134
- PubMed:
- 24665340
- PubMed Central:
- PMC3962298
- https://doi.org/10.1111/eva.12134
- Author:
- John F. Gaskin, et al. ; José L. Villar; Mª Ángeles Alonso; Ana Juan; Manuel B. Crespo; Show all 5 Authors
- Source:
- Taxon 2014 v.63 no.5 pp. 1140-1141
- ISSN:
- 0040-0262
- Subject:
- Tamarix ramosissima; biological nomenclature; botanists; herbaria; lakes; lectotypes; plant taxonomy; India; Kazakhstan; West Asia
- Abstract:
- ... Ledebour described Tamarix ramosissima in 1829 from plants collected in Kazakhstan (Lake Noor Zaisan). In the protologue he overlooked T. pentandra Pall. (l.c.) and T. pallasii Desv. (l.c.), two earlier names which apply to the same biological entity, also widespread through Central and Western Asia. During the 19th Century, most botanists considered T. ramosissima as a synonym of T. pallasii (Boi ...
- Handle:
- 10113/59758
- DOI:
- 10.12705/635.33
- https://doi.org/10.12705/635.33