151
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Shi J, Joshi J, Tielbörger K, Verhoeven KJF, Macel M. Costs and benefits of admixture between foreign genotypes and local populations in the field. Ecol Evol 2018; 8:3675-3684. [PMID: 29686848 PMCID: PMC5901173 DOI: 10.1002/ece3.3946] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 12/11/2022] Open
Abstract
Admixture is the hybridization between populations within one species. It can increase plant fitness and population viability by alleviating inbreeding depression and increasing genetic diversity. However, populations are often adapted to their local environments and admixture with distant populations could break down local adaptation by diluting the locally adapted genomes. Thus, admixed genotypes might be selected against and be outcompeted by locally adapted genotypes in the local environments. To investigate the costs and benefits of admixture, we compared the performance of admixed and within-population F1 and F2 generations of the European plant Lythrum salicaria in a reciprocal transplant experiment at three European field sites over a 2-year period. Despite strong differences between site and plant populations for most of the measured traits, including herbivory, we found limited evidence for local adaptation. The effects of admixture depended on experimental site and plant population, and were positive for some traits. Plant growth and fruit production of some populations increased in admixed offspring and this was strongest with larger parental distances. These effects were only detected in two of our three sites. Our results show that, in the absence of local adaptation, admixture may boost plant performance, and that this is particularly apparent in stressful environments. We suggest that admixture between foreign and local genotypes can potentially be considered in nature conservation to restore populations and/or increase population viability, especially in small inbred or maladapted populations.
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Affiliation(s)
- Jun Shi
- Institute of Evolution and Ecology Plant Ecology Group University of Tübingen Tübingen Germany.,Ningbo Academy of Agricultural Sciences Ningbo China
| | - Jasmin Joshi
- Biodiversity Research/Systematic Botany Institute of Biochemistry and Biology University of Potsdam Potsdam Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB) Institute of Biology Freie Universität Berlin Berlin Germany
| | - Katja Tielbörger
- Institute of Evolution and Ecology Plant Ecology Group University of Tübingen Tübingen Germany
| | - Koen J F Verhoeven
- Department of Terrestrial Ecology Netherlands Institute of Ecology (NIOO-KNAW) Wageningen the Netherlands
| | - Mirka Macel
- Institute of Evolution and Ecology Plant Ecology Group University of Tübingen Tübingen Germany.,Molecular Interaction Ecology Department of Plant Science Radboud University Nijmegen Nijmegen the Netherlands.,Plant Ecology and Phytochemistry Leiden Institute of Biology Leiden the Netherlands
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152
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A meta-analysis of the evolution of increased competitive ability hypothesis: genetic-based trait variation and herbivory resistance trade-offs. Biol Invasions 2018. [DOI: 10.1007/s10530-018-1724-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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153
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Lu-Irving P, Marx HE, Dlugosch KM. Leveraging contemporary species introductions to test phylogenetic hypotheses of trait evolution. CURRENT OPINION IN PLANT BIOLOGY 2018; 42:95-102. [PMID: 29754025 DOI: 10.1016/j.pbi.2018.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 04/18/2018] [Accepted: 04/22/2018] [Indexed: 06/08/2023]
Abstract
Plant trait evolution is a topic of interest across disciplines and scales. Phylogenetic studies are powerful for generating hypotheses about the mechanisms that have shaped plant traits and their evolution. Introduced plants are a rich source of data on contemporary trait evolution. Introductions could provide especially useful tests of a variety of evolutionary hypotheses because the environments selecting on evolving traits are still present. We review phylogenetic and contemporary studies of trait evolution and identify areas of overlap and areas for further integration. Emerging tools which can promote integration include broadly focused repositories of trait data, and comparative models of trait evolution that consider both intra and interspecific variation.
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Affiliation(s)
- Patricia Lu-Irving
- Department of Ecology and Evolutionary Biology, University of Arizona, PO Box 210088, Tucson, AZ 85721, USA.
| | - Hannah E Marx
- Department of Ecology and Evolutionary Biology, University of Arizona, PO Box 210088, Tucson, AZ 85721, USA
| | - Katrina M Dlugosch
- Department of Ecology and Evolutionary Biology, University of Arizona, PO Box 210088, Tucson, AZ 85721, USA
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154
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Shi J, Macel M, Tielbörger K, Verhoeven KJF. Effects of admixture in native and invasive populations of Lythrum salicaria. Biol Invasions 2018; 20:2381-2393. [PMID: 30956538 PMCID: PMC6417435 DOI: 10.1007/s10530-018-1707-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 03/13/2018] [Indexed: 11/30/2022]
Abstract
Intraspecific hybridization between diverged populations can enhance fitness via various genetic mechanisms. The benefits of such admixture have been proposed to be particularly relevant in biological invasions, when invasive populations originating from different source populations are found sympatrically. However, it remains poorly understood if admixture is an important contributor to plant invasive success and how admixture effects compare between invasive and native ranges. Here, we used experimental crosses in Lythrum salicaria, a species with well-established history of multiple introductions to Eastern North America, to quantify and compare admixture effects in native European and invasive North American populations. We observed heterosis in between-population crosses both in native and invasive ranges. However, invasive-range heterosis was restricted to crosses between two different Eastern and Western invasion fronts, whereas heterosis was absent in geographically distant crosses within a single large invasion front. Our results suggest that multiple introductions have led to already-admixed invasion fronts, such that experimental crosses do not further increase performance, but that contact between different invasion fronts further enhances fitness after admixture. Thus, intra-continental movement of invasive plants in their introduced range has the potential to boost invasiveness even in well-established and successfully spreading invasive species.
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Affiliation(s)
- Jun Shi
- 1Institute of Ecology and Evolution, Plant Ecology Group, University of Tübingen, 72076 Tübingen, Germany.,2Ningbo Academy of Agricultural Sciences, Ningbo, 315040 China
| | - Mirka Macel
- 1Institute of Ecology and Evolution, Plant Ecology Group, University of Tübingen, 72076 Tübingen, Germany.,3Department of Plant Science, Radboud University Nijmegen, P.O. Box 9010, 6500 NL Nijmegen, Netherlands
| | - Katja Tielbörger
- 1Institute of Ecology and Evolution, Plant Ecology Group, University of Tübingen, 72076 Tübingen, Germany
| | - Koen J F Verhoeven
- 4Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, Netherlands
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155
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Zhang NN, Yu JJ, Wang YH, Gong X. Molecular evidence for asymmetric hybridization in three closely related sympatric species. AOB PLANTS 2018; 10:ply011. [PMID: 29492242 PMCID: PMC5824843 DOI: 10.1093/aobpla/ply011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 02/07/2018] [Indexed: 05/14/2023]
Abstract
Natural hybridization is common in plants and results in different evolutionary consequences to hybridizing species. Pre- and post-zygotic reproductive isolating barriers can impede hybridization between closely related species to maintain their species integrity. In Northwest Yunnan, three Ligularia species (Ligularia cyathiceps, L. duciformis and L. yunnanensis) and four types of morphologically intermediate individuals were discovered growing together in an area subject to human disturbance. In this study, we used three low-copy nuclear loci to test the natural hybridization hypothesis and the hybridization direction was ascertained by three chloroplast DNA fragments. The results indicated there were two hybridization groups at the study site, L. cyathiceps × L. duciformis and L. duciformis × L. yunnanensis, and two types of morphologically intermediate individuals were produced by L. cyathiceps and L. duciformis, and another two types were produced by L. duciformis and L. yunnanensis, while no hybrids between L. cyathiceps and L. yunnanensis were observed. Both hybridizing groups showed bidirectional but asymmetric hybridization and the factors influencing the symmetry are discussed. Most hybrids produced by the two hybridization groups seemed to be F1 generation. Hybrids with different morphologies within the same hybridization group showed similar genetic components. The results suggest that although human disturbance may promote natural hybridization among the three Ligularia species bringing them together, hybrids are limited to F1s and therefore species boundaries might be maintained.
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Affiliation(s)
- Ning-Ning Zhang
- Plant Science Institute, School of Life Sciences, Yunnan University, 650201 Kunming, Yunnan, China
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 650201 Kunming, Yunnan, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Jiao-Jun Yu
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 650201 Kunming, Yunnan, China
| | - Yue-Hua Wang
- Plant Science Institute, School of Life Sciences, Yunnan University, 650201 Kunming, Yunnan, China
| | - Xun Gong
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 650201 Kunming, Yunnan, China
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156
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Zou J, Hu D, Mason AS, Shen X, Wang X, Wang N, Grandke F, Wang M, Chang S, Snowdon RJ, Meng J. Genetic changes in a novel breeding population of Brassica napus synthesized from hundreds of crosses between B. rapa and B. carinata. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:507-519. [PMID: 28703467 PMCID: PMC5811809 DOI: 10.1111/pbi.12791] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 06/29/2017] [Accepted: 07/07/2017] [Indexed: 05/20/2023]
Abstract
Introgression of genomic variation between and within related crop species is a significant evolutionary approach for population differentiation, genome reorganization and trait improvement. Using the Illumina Infinium Brassica 60K SNP array, we investigated genomic changes in a panel of advanced generation new-type Brassica napus breeding lines developed from hundreds of interspecific crosses between 122 Brassica rapa and 74 Brassica carinata accessions, and compared them with representative accessions of their three parental species. The new-type B. napus population presented rich genetic diversity and abundant novel genomic alterations, consisting of introgressions from B. rapa and B. carinata, novel allelic combinations, reconstructed linkage disequilibrium patterns and haplotype blocks, and frequent deletions and duplications (nonrandomly distributed), particularly in the C subgenome. After a much shorter, but very intensive, selection history compared to traditional B. napus, a total of 15 genomic regions with strong selective sweeps and 112 genomic regions with putative signals of selective sweeps were identified. Some of these regions were associated with important agronomic traits that were selected for during the breeding process, while others were potentially associated with restoration of genome stability and fertility after interspecific hybridization. Our results demonstrate how a novel method for population-based crop genetic improvement can lead to rapid adaptation, restoration of genome stability and positive responses to artificial selection.
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Affiliation(s)
- Jun Zou
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Dandan Hu
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Annaliese S. Mason
- Department of Plant BreedingIFZ Research Centre for BiosystemsLand Use and NutritionJustus Liebig UniversityGiessenGermany
| | - Xueqi Shen
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Xiaohua Wang
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Nian Wang
- College of Horticulture & Forestry SciencesHuazhong Agricultural UniversityWuhanChina
| | - Fabian Grandke
- Department of Plant BreedingIFZ Research Centre for BiosystemsLand Use and NutritionJustus Liebig UniversityGiessenGermany
| | - Meng Wang
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Shihao Chang
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
| | - Rod J. Snowdon
- Department of Plant BreedingIFZ Research Centre for BiosystemsLand Use and NutritionJustus Liebig UniversityGiessenGermany
| | - Jinling Meng
- National Key Laboratory of Crop Genetic ImprovementHuazhong Agricultural UniversityWuhanChina
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157
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Hybridization can facilitate species invasions, even without enhancing local adaptation. Proc Natl Acad Sci U S A 2018; 113:10210-4. [PMID: 27601582 DOI: 10.1073/pnas.1605626113] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The founding population in most new species introductions, or at the leading edge of an ongoing invasion, is likely to be small. Severe Allee effects-reductions in individual fitness at low population density-may then result in a failure of the species to colonize, even if the habitat could support a much larger population. Using a simulation model for plant populations that incorporates demography, mating systems, quantitative genetics, and pollinators, we show that Allee effects can potentially be overcome by transient hybridization with a resident species or an earlier colonizer. This mechanism does not require the invocation of adaptive changes usually attributed to invasions following hybridization. We verify our result in a case study of sequential invasions by two plant species where the outcrosser Cakile maritima has replaced an earlier, inbreeding, colonizer Cakile edentula (Brassicaceae). Observed historical rates of replacement are consistent with model predictions from hybrid-alleviated Allee effects in outcrossers, although other causes cannot be ruled out.
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158
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159
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Yabu MHS, Vidotto-Magnoni AP, Casimiro ACR, Garcia DAZ, Costa ADA, Prado FDD, Porto-Foresti F, Orsi ML. First record of non-native hybrid catfish Pseudoplatystoma reticulatum × Leiarius marmoratus in the Upper Paraná River basin, Brazil. JOURNAL OF FISH BIOLOGY 2018; 92:261-267. [PMID: 29194600 DOI: 10.1111/jfb.13505] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 10/26/2017] [Indexed: 06/07/2023]
Abstract
The aim of this study is to report the presence of a three non-native hybrid long-whiskered catfishes (family Pimelodidae) in the Upper Paraná River basin, Brazil. Genetic analyses demonstrated that the three presumptive hybrids were a result of the crossbreeding of Pseudoplatystoma reticulatum (central Amazonas River basin and Lower Paraná River) and Leiarius marmoratus (Amazonas, Essequibo and Orinoco rivers), producing a hybrid commonly known in Brazil as cachandiá. The potential threat to biodiversity, due to possible genetic contamination, competition and predation of wild stocks, of such artificially produced hybrid fishes is discussed.
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Affiliation(s)
- M H S Yabu
- Programa de Pós-graduação em Ciências Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
| | - A P Vidotto-Magnoni
- Laboratório de Ecologia de Peixes e Invasões Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
| | - A C R Casimiro
- Laboratório de Ecologia de Peixes e Invasões Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
| | - D A Z Garcia
- Programa de Pós-graduação em Ciências Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
| | - A D A Costa
- Programa de Pós-graduação em Ciências Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
| | - F D D Prado
- Laboratório de Genética de Peixes, Universidade Estadual Paulista, Departamento de Ciências Biológicas, Faculdade de Ciências, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, CEP 17.033-360, Bauru, São Paulo, Brazil
| | - F Porto-Foresti
- Laboratório de Genética de Peixes, Universidade Estadual Paulista, Departamento de Ciências Biológicas, Faculdade de Ciências, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, CEP 17.033-360, Bauru, São Paulo, Brazil
| | - M L Orsi
- Laboratório de Ecologia de Peixes e Invasões Biológicas, Universidade Estadual de Londrina, Centro de Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86.057-970, Londrina, Paraná, Brazil
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160
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Tamate S, Iwasaki WM, Krysko KL, Camposano BJ, Mori H, Funayama R, Nakayama K, Makino T, Kawata M. Inferring evolutionary responses of Anolis carolinensis introduced into the Ogasawara archipelago using whole genome sequence data. Sci Rep 2017; 7:18008. [PMID: 29269734 PMCID: PMC5740155 DOI: 10.1038/s41598-017-17852-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 12/01/2017] [Indexed: 12/30/2022] Open
Abstract
Invaded species often can rapidly expand and establish in novel environments through adaptive evolution, resulting in devastating effects on native communities. However, it is unclear if genetic variation at whole-genomic levels is actually reduced in the introduced populations and which genetic changes have occurred responding to adaptation to new environments. In the 1960s, Anolis carolinensis was introduced onto one of the Ogasawara Islands, Japan, and subsequently expanded its range rapidly throughout two of the islands. Morphological comparison showed that lower hindlimb length in the introduced populations tended to be longer than those in its native Florida populations. Using re-sequenced whole genomic data, we estimated that the effective population size at the time of introduction was actually small (less than 50). We also inferred putative genomic regions subject to natural selection after this introduction event using SweeD and a method based on Tajima's D, π and F ST . Five candidate genes that were potentially subject to selection were estimated by both methods. The results suggest that there were standing variations that could potentially contribute to adaptation to nonnative environments despite the founder population being small.
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Affiliation(s)
- Satoshi Tamate
- Department of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Watal M Iwasaki
- Department of Evolutionary Studies of Biosystems, SOKENDAI (The Graduate University for Advanced Studies), Hayama, Japan
| | - Kenneth L Krysko
- Division of Herpetology, Florida Museum of Natural History, 1659 Museum Road, University of Florida, Gainesville, FL, 32611, USA
| | - Brian J Camposano
- Forest Management Bureau, Florida Forest Service, Florida Department of Agriculture and Consumer Services, 3125 Conner Boulevard, I-255, Tallahassee, FL, 32399, USA
| | - Hideaki Mori
- Japan Wildlife Research Center, Ogasawara Division, Okumura, Chichijima, Ogasawara, Tokyo, 100-2101, Japan
| | - Ryo Funayama
- United Center for Advanced Research and Translational Medicine, Graduate School of Medicine, Tohoku University, 2-1 Seiryo, Aoba, Sendai, 980-8575, Japan
| | - Keiko Nakayama
- United Center for Advanced Research and Translational Medicine, Graduate School of Medicine, Tohoku University, 2-1 Seiryo, Aoba, Sendai, 980-8575, Japan
| | - Takashi Makino
- Department of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan.
| | - Masakado Kawata
- Department of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan.
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161
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Kovach RP, Hand BK, Hohenlohe PA, Cosart TF, Boyer MC, Neville HH, Muhlfeld CC, Amish SJ, Carim K, Narum SR, Lowe WH, Allendorf FW, Luikart G. Vive la résistance: genome-wide selection against introduced alleles in invasive hybrid zones. Proc Biol Sci 2017; 283:rspb.2016.1380. [PMID: 27881749 DOI: 10.1098/rspb.2016.1380] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 10/25/2016] [Indexed: 12/11/2022] Open
Abstract
Evolutionary and ecological consequences of hybridization between native and invasive species are notoriously complicated because patterns of selection acting on non-native alleles can vary throughout the genome and across environments. Rapid advances in genomics now make it feasible to assess locus-specific and genome-wide patterns of natural selection acting on invasive introgression within and among natural populations occupying diverse environments. We quantified genome-wide patterns of admixture across multiple independent hybrid zones of native westslope cutthroat trout and invasive rainbow trout, the world's most widely introduced fish, by genotyping 339 individuals from 21 populations using 9380 species-diagnostic loci. A significantly greater proportion of the genome appeared to be under selection favouring native cutthroat trout (rather than rainbow trout), and this pattern was pervasive across the genome (detected on most chromosomes). Furthermore, selection against invasive alleles was consistent across populations and environments, even in those where rainbow trout were predicted to have a selective advantage (warm environments). These data corroborate field studies showing that hybrids between these species have lower fitness than the native taxa, and show that these fitness differences are due to selection favouring many native genes distributed widely throughout the genome.
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Affiliation(s)
- Ryan P Kovach
- Northern Rocky Mountain Science Center, US Geological Survey, Missoula, MT 59802, USA
| | - Brian K Hand
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA
| | - Paul A Hohenlohe
- Institute for Bioinformatics and Evolutionary Studies, Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Ted F Cosart
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | | | | | - Clint C Muhlfeld
- Northern Rocky Mountain Science Center, US Geological Survey, Missoula, MT 59802, USA.,Flathead Biological Station, University of Montana, Polson, MT 59860, USA
| | - Stephen J Amish
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Kellie Carim
- Wildlife Biology Program, University of Montana, Missoula, MT 59812, USA
| | - Shawn R Narum
- Hagerman Genetics Laboratory, Columbia River Inter-Tribal Fish Commission, Hagerman, ID 83332, USA
| | - Winsor H Lowe
- Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Fred W Allendorf
- Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Gordon Luikart
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
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162
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Mondon A, Owens GL, Poverene M, Cantamutto M, Rieseberg LH. Gene flow in Argentinian sunflowers as revealed by genotyping-by-sequencing data. Evol Appl 2017; 11:193-204. [PMID: 29387155 PMCID: PMC5775495 DOI: 10.1111/eva.12527] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 07/26/2017] [Indexed: 01/04/2023] Open
Abstract
Gene flow can have several different applied consequences, ranging from extinction to the escape of transgenes to the evolution of weedy or invasive lineages. Here, we describe patterns of hybridization and gene flow involving domesticated and wild sunflowers in Argentina. To address the risks of introgression of variants from the cultivated sunflower into invasive wild Helianthus, we used genotyping‐by‐sequencing (GBS) to genotype 182 samples from 11 sites in Argentina, along with previously published data from samples from the native range (North America), to determine the native source populations of the Argentinian samples and to detect admixture. We unexpectedly discovered two distinctive forms of H. petiolaris in Argentina, one from H. petiolaris subsp. petiolaris as expected, but the other from an unknown source. Extensive admixture was observed among Argentinian sunflowers, largely confirming phenotypic predictions. While many hybrids are F1s, there were signals consistent with introgression from the domesticated sunflower into H. petiolaris. Whether this introgression is incidental or a causal driver of invasiveness is not yet clear, but it seems likely that genes found in the domesticated sunflower genome (whether engineered or not) will quickly find their way into wild Argentinian sunflower populations.
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Affiliation(s)
- Ana Mondon
- Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS) CCT Bahía Blanca Provincia de Buenos Aires Argentina
| | - Gregory L Owens
- Department of Botany and Biodiversity Research Centre University of British Columbia Vancouver BC Canada
| | - Mónica Poverene
- Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS) CCT Bahía Blanca Provincia de Buenos Aires Argentina.,Dpto. Agronomía Universidad Nacional del Sur (UNS) Bahía Blanca Argentina
| | - Miguel Cantamutto
- Estación Experimental Agropecuaria Instituto Nacional de Tecnología Agropecuaria (INTA) Hilario Ascasubi Argentina
| | - Loren H Rieseberg
- Department of Botany and Biodiversity Research Centre University of British Columbia Vancouver BC Canada
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163
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Wódkiewicz M, Chwedorzewska KJ, Bednarek PT, Znój A, Androsiuk P, Galera H. How much of the invader's genetic variability can slip between our fingers? A case study of secondary dispersal of Poa annua on King George Island (Antarctica). Ecol Evol 2017; 8:592-600. [PMID: 29321896 PMCID: PMC5756844 DOI: 10.1002/ece3.3675] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 10/24/2017] [Accepted: 11/08/2017] [Indexed: 01/13/2023] Open
Abstract
We studied an invasion of Poa annua on King George Island (Maritime Antarctic). The remoteness of this location, its geographic isolation, and its limited human traffic provided an opportunity to trace the history of an invasion of the species. Poa annua was recorded for the first time at H. Arctowski Polish Antarctic Station in the austral summer of 1985/6. In 2008/9, the species was observed in a new locality at the Ecology Glacier Forefield (1.5 km from “Arctowski”). We used AFLP to analyze the genetic differences among three populations of P. annua: the two mentioned above (Station and Forefield) and the putative origin of the introduction, Warsaw (Poland). There was 38% genetic variance among the populations. Pairwise ФPT was 0.498 between the Forefield and Warsaw populations and 0.283 between Warsaw and Station. There were 15 unique bands in the Warsaw population (frequency from 6% to 100%) and one in the Station/Forefield populations (which appears in all analyzed individuals from both populations). The Δ(K) parameter indicated two groups of samples: Warsaw/Station and Forefield. As indicated by Fu's Fs statistics and an analysis of mismatch distribution, the Forefield population underwent a bottleneck and/or founder effect. The Forefield population was likely introduced by secondary dispersal from the Station population.
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Affiliation(s)
- Maciej Wódkiewicz
- Biological and Chemical Research Centre Faculty of Biology University of Warsaw Warsaw Poland
| | | | - Piotr T Bednarek
- Plant Breeding and Acclimatization Institute - National Research Institute Błonie Poland
| | - Anna Znój
- Institute of Biochemistry and Biophysics Polish Academy of Sciences Warsaw Poland
| | - Piotr Androsiuk
- Department of Plant Physiology, Genetics and Biotechnology University of Warmia and Mazury in Olsztyn Olsztyn Poland
| | - Halina Galera
- Biological and Chemical Research Centre Faculty of Biology University of Warsaw Warsaw Poland
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164
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Hyldgaard B, Lambertini C, Brix H. Phylogeography reveals a potential cryptic invasion in the Southern Hemisphere of Ceratophyllum demersum, New Zealand's worst invasive macrophyte. Sci Rep 2017; 7:16569. [PMID: 29185467 PMCID: PMC5707378 DOI: 10.1038/s41598-017-16712-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 11/16/2017] [Indexed: 11/13/2022] Open
Abstract
Ceratophyllum demersum (common hornwort) is presently considered the worst invasive submerged aquatic macrophyte in New Zealand. We explored the global phylogeographic pattern of the species, based on chloroplast and nuclear DNA, in order to identify the origin of the invasive populations in New Zealand and to clarify if there were multiple introductions. The phylogeographic study identified geographically differentiated gene pools in North America, tropical Asia, Australia, and South Africa, likely native to these regions, and a recent dispersal event of a Eurasian-related haplotype to North America, New Zealand, Australia, and South Africa. At least two different invasive genotypes of this Eurasian-related haplotype have been found in New Zealand. One genotype is closely related to genotypes in Australia and South Africa, while we could not trace the closest relatives of the other genotype within our C. demersum sample set. Contrasting spectra of genetic distances in New Zealand and in a region within the native range (Denmark), suggest that the invasive population was founded by vegetative reproduction, seen as low genetic distances among genotypes. We also discovered the introduction of the same Eurasian-related haplotype in Australia and South Africa and that a cryptic invasion may be occurring in these continents.
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Affiliation(s)
- Benita Hyldgaard
- Department of Bioscience, Section of Aquatic Biology, Aarhus University, Aarhus, Denmark.
- Department of Food Science, Section of Plants, Food and Climate, Aarhus University, Aarslev, Denmark.
| | - Carla Lambertini
- Department of Bioscience, Section of Aquatic Biology, Aarhus University, Aarhus, Denmark
| | - Hans Brix
- Department of Bioscience, Section of Aquatic Biology, Aarhus University, Aarhus, Denmark
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165
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Cesari M, Maistrello L, Piemontese L, Bonini R, Dioli P, Lee W, Park CG, Partsinevelos GK, Rebecchi L, Guidetti R. Genetic diversity of the brown marmorated stink bug Halyomorpha halys in the invaded territories of Europe and its patterns of diffusion in Italy. Biol Invasions 2017. [DOI: 10.1007/s10530-017-1611-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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166
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Discovery and validation of species–specific diagnostic SNP markers for the endangered San Diego fairy shrimp (Branchinecta sandiegonensis) and the versatile fairy shrimp (Branchinecta lindahli). CONSERV GENET RESOUR 2017. [DOI: 10.1007/s12686-017-0912-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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167
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Boecklen WJ. Topology of syngameons. Ecol Evol 2017; 7:10486-10491. [PMID: 29299231 PMCID: PMC5743628 DOI: 10.1002/ece3.3507] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 07/27/2017] [Accepted: 08/31/2017] [Indexed: 11/10/2022] Open
Abstract
Syngameons are sets of species linked by interspecific hybridization. Common observations regarding the structure of syngameons are that hybridization propensity is not uniform across species and that patterns of hybridization are dominated by a few species. I use computer simulations to test these claims in naturally occurring syngameons selected from the literature and from personal observation. Natural syngameons, especially those involving plants, typically exhibit nonrandom structure: The first three order statistics for the number of hybrid partners and the variance in the number of hybrid partners are larger than chance alone would predict. The structure of two insect syngameons examined is not significantly different from random. To test a hypothesis that variation in hybridization propensity across species in natural syngameons is simply an artifact of hybridization opportunity, I examine the structure of four artificial syngameons (fertility relationships) produced by full diallel crosses. Three of four artificial syngameons exhibit nonrandom structure, as the observed variation in number of successful crosses is larger than chance alone would predict. In general, there are no significant results involving the order statistics. Finally, I discuss biogeographic, ecological, and phylogenetic hypotheses for variation in hybridization propensity across species in natural syngameons.
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168
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Ben-Shlomo R. Invasiveness, chimerism and genetic diversity. Mol Ecol 2017; 26:6502-6509. [PMID: 28950415 DOI: 10.1111/mec.14364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 08/11/2017] [Accepted: 09/13/2017] [Indexed: 01/09/2023]
Abstract
Adaptation for invasiveness should comprise the capability to exploit and prosper in a wide range of ecological conditions and is therefore expected to be associated with a certain level of genetic diversity. Paradoxically, however, invasive populations are established by only a few founders, resulting in low genetic diversity. As a conceivable way of attaining high genetic diversity and high variance of gene expression even when a small number of founders is involved in invasiveness, I suggest here chimerism, a fusion between different individuals-a common phenomenon found in numerous phyla. The composite entity offers the chimeric organism genetic flexibility and higher inclusive fitness that depends on the joint genomic fitness of the original partners. The ability to form a chimeric entity is also applied to subsequent generations, and consequently, the level of genetic diversity does not decline over generations of population establishment following invasion.
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Affiliation(s)
- Rachel Ben-Shlomo
- Department of Biology and the Environment, University of Haifa - Oranim, Tivon, Israel
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169
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A quantitative genetic framework highlights the role of epistatic effects for grain-yield heterosis in bread wheat. Nat Genet 2017; 49:1741-1746. [PMID: 29038596 DOI: 10.1038/ng.3974] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 09/21/2017] [Indexed: 12/15/2022]
Abstract
Increasing wheat yield is a key global challenge to producing sufficient food for a growing human population. Wheat grain yield can be boosted by exploiting heterosis, the superior performance of hybrids compared with midparents. Here we present a tailored quantitative genetic framework to study the genetic basis of midparent heterosis in hybrid populations derived from crosses among diverse parents. We applied this framework to an extensive data set assembled for winter wheat. Grain yield was assessed for 1,604 hybrids and their 135 parental elite breeding lines in 11 environments. The hybrids outperformed the midparents by 10% on average, representing approximately 15 years of breeding progress in wheat, thus further substantiating the remarkable potential of hybrid-wheat breeding. Genome-wide prediction and association mapping implemented through the developed quantitative genetic framework showed that dominance effects played a less prominent role than epistatic effects in grain-yield heterosis in wheat.
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170
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Hybridization rate and genotypic diversity of apomictic hybrids between native (Taraxacum japonicum) and introduced (T. officinale) dandelions in western Japan. CONSERV GENET 2017. [DOI: 10.1007/s10592-017-1014-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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171
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Chapuis E, Lamy T, Pointier JP, Juillet N, Ségard A, Jarne P, David P. Bioinvasion Triggers Rapid Evolution of Life Histories in Freshwater Snails. Am Nat 2017; 190:694-706. [PMID: 29053358 DOI: 10.1086/693854] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Biological invasions offer interesting situations for observing how novel interactions between closely related, formerly allopatric species may trigger phenotypic evolution in situ. Assuming that successful invaders are usually filtered to be competitively dominant, invasive and native species may follow different trajectories. Natives may evolve traits that minimize the negative impact of competition, while trait shifts in invasives should mostly reflect expansion dynamics, through selection for colonization ability and transiently enhanced mutation load at the colonization front. These ideas were tested through a large-scale common-garden experiment measuring life-history traits in two closely related snail species, one invasive and one native, co-occurring in a network of freshwater ponds in Guadeloupe. We looked for evidence of recent evolution by comparing uninvaded or recently invaded sites with long-invaded ones. The native species adopted a life history favoring rapid population growth (i.e., increased fecundity, earlier reproduction, and increased juvenile survival) that may increase its prospects of coexistence with the more competitive invader. We discuss why these effects are more likely to result from genetic change than from maternal effects. The invader exhibited slightly decreased overall performances in recently colonized sites, consistent with a moderate expansion load resulting from local founder effects. Our study highlights a rare example of rapid life-history evolution following invasion.
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172
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Tseng M. The Effect of Parasitism and Interpopulation Hybridization on Aedes albopictus (Diptera: Culicidae) Fitness. JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:1236-1242. [PMID: 28419266 DOI: 10.1093/jme/tjx075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Indexed: 06/07/2023]
Abstract
Recent research in mosquito population genetics suggests that interpopulation hybridization has likely contributed to the rapid spread of the container-breeding mosquitoes. Here, I used laboratory experiments to investigate whether interpopulation Aedes (Stegomyia) albopictus (Skuse) F1 and F2 hybrids exhibit higher fitness than parental populations, and whether hybrid mosquito performance is related to infection by the coevolved protozoan parasite Ascogregarina taiwanensis (Lien and Levine). Overall, there were significant differences in development time, wing length, and survival between the two parental mosquito populations, but no difference in per capita growth rate r. Hybrid mosquitoes were generally intermediate in phenotype to the parentals, except that F2 females were significantly larger than the midparent average. In addition, As. taiwanensis parasites produced fewest oocysts when they were reared in hosts of hybrid origin. These data suggest that hybridization between previously isolated mosquito populations can result in slight increases in potential mosquito reproductive success, via increased hybrid body size, and via the temporary escape from coevolved parasites. These findings are significant because studies have shown that even slight hybrid vigor can have positive fitness consequences for population persistence. Although this was a laboratory experiment extending only to the F2 generation, many other invasive insects also carry coevolved parasites, and thus the patterns seen in this mosquito system may be broadly relevant.
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Affiliation(s)
- Michelle Tseng
- Department of Zoology, University of British Columbia, 4200-6270 University Blvd., Vancouver, BC, V6T 1Z4
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173
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Dormontt EE, Prentis PJ, Gardner MG, Lowe AJ. Occasional hybridization between a native and invasive Senecio species in Australia is unlikely to contribute to invasive success. PeerJ 2017; 5:e3630. [PMID: 28828245 PMCID: PMC5562138 DOI: 10.7717/peerj.3630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 07/11/2017] [Indexed: 11/29/2022] Open
Abstract
Background Hybridization between native and invasive species can facilitate introgression of native genes that increase invasive potential by providing exotic species with pre-adapted genes suitable for new environments. In this study we assessed the outcome of hybridization between native Senecio pinnatifolius var. pinnatifolius A.Rich. (dune ecotype) and invasive Senecio madagascariensis Poir. to investigate the potential for introgression of adaptive genes to have facilitated S. madagascariensis spread in Australia. Methods We used amplified fragment length polymorphisms (141 loci) and nuclear microsatellites (2 loci) to genotype a total of 118 adults and 223 seeds from S. pinnatifolius var.pinnatifolius and S. madagascariensis at one allopatric and two shared sites. We used model based clustering and assignment methods to establish whether hybrid seed set and mature hybrids occur in the field. Results We detected no adult hybrids in any population. Low incidence of hybrid seed set was found at Lennox Head where the contact zone overlapped for 20 m (6% and 22% of total seeds sampled for S. pinnatifolius var. pinnatifolius and S. madagascariensis respectively). One hybrid seed was detected at Ballina where a gap of approximately 150 m was present between species (2% of total seeds sampled for S. madagascariensis). Conclusions We found no evidence of adult hybrid plants at two shared sites. Hybrid seed set from both species was identified at low levels. Based on these findings we conclude that introgression of adaptive genes from S. pinnatifolius var. pinnatifolius is unlikely to have facilitated S. madagascariensis invasions in Australia. Revisitation of one site after two years could find no remaining S. pinnatifolius var. pinnatifolius, suggesting that contact zones between these species are dynamic and that S. pinnatifolius var. pinnatifolius may be at risk of displacement by S. madagascariensis in coastal areas.
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Affiliation(s)
- Eleanor E Dormontt
- The Environment Institute, School of Biological Sciences, University of Adelaide, Adelaide, South Australia, Australia
| | - Peter J Prentis
- Institute for Future Environments, School of Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Michael G Gardner
- School of Biological Sciences, Flinders University of South Australia, Adelaide, South Australia, Australia
| | - Andrew J Lowe
- The Environment Institute, School of Biological Sciences, University of Adelaide, Adelaide, South Australia, Australia
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174
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Konowalik K, Proćków M, Proćków J. Climatic niche of Selinum alatum (Apiaceae, Selineae), a new invasive plant species in Central Europe and its alterations according to the climate change scenarios: Are the European mountains threatened by invasion? PLoS One 2017; 12:e0182793. [PMID: 28806731 PMCID: PMC5555634 DOI: 10.1371/journal.pone.0182793] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 07/04/2017] [Indexed: 02/04/2023] Open
Abstract
In recent years, a few established populations of Selinum alatum have been found in the Eastern Carpathians outside its native range that is the Caucasus and the Armenian Highlands. The species is spreading predominantly in Poland where it can outcompete native plants in certain cases. This study addresses a potential climatic niche of the plant with the special aims to illuminate future spreading and indicate areas suitable for invasion. Our results show that the extent of the favourable habitat of the species is broader than currently known. This suggests that the plant has the ability to become a potential new element in some semi-natural or disturbed ecosystems associated with mountainous areas, especially in Central and Southern Europe. Future (2070) models mostly rendered similar suitability maps, but showed slight differences over particular areas and a contraction of suitable habitats, mainly in the northern part of the non-native range.
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Affiliation(s)
- Kamil Konowalik
- Department of Plant Biology, Institute of Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | | | - Jarosław Proćków
- Department of Plant Biology, Institute of Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
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175
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Klonner G, Dullinger I, Wessely J, Bossdorf O, Carboni M, Dawson W, Essl F, Gattringer A, Haeuser E, van Kleunen M, Kreft H, Moser D, Pergl J, Pyšek P, Thuiller W, Weigelt P, Winter M, Dullinger S. Will climate change increase hybridization risk between potential plant invaders and their congeners in Europe? DIVERS DISTRIB 2017; 23:934-943. [PMID: 28781572 PMCID: PMC5518762 DOI: 10.1111/ddi.12578] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
AIM Interspecific hybridization can promote invasiveness of alien species. In many regions of the world, public and domestic gardens contain a huge pool of non-native plants. Climate change may relax constraints on their naturalization and hence facilitate hybridization with related species in the resident flora. Here, we evaluate this possible increase in hybridization risk by predicting changes in the overlap of climatically suitable ranges between a set of garden plants and their congeners in the resident flora. LOCATION Europe. METHODS From the pool of alien garden plants, we selected those which (1) are not naturalized in Europe, but established outside their native range elsewhere in the world; (2) belong to a genus where interspecific hybridization has been previously reported; and (3) have congeners in the native and naturalized flora of Europe. For the resulting set of 34 alien ornamentals as well as for 173 of their European congeners, we fitted species distribution models and projected suitable ranges under the current climate and three future climate scenarios. Changes in range overlap between garden plants and congeners were then assessed by means of the true skill statistic. RESULTS Projections suggest that under a warming climate, suitable ranges of garden plants will increase, on average, while those of their congeners will remain constant or shrink, at least under the more severe climate scenarios. The mean overlap in ranges among congeners of the two groups will decrease. Variation among genera is pronounced; however, and for some congeners, range overlap is predicted to increase significantly. MAIN CONCLUSIONS Averaged across all modelled species, our results do not indicate that hybrids between potential future invaders and resident species will emerge more frequently in Europe when climate warms. These average trends do not preclude, however, that hybridization risk may considerably increase in particular genera.
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Affiliation(s)
- Günther Klonner
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
| | - Iwona Dullinger
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
- Institute of Social EcologyFaculty for Interdisciplinary StudiesAlps Adria UniversityViennaAustria
| | - Johannes Wessely
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
| | - Oliver Bossdorf
- Institute of Evolution & EcologyUniversity of TübingenTübingenGermany
| | - Marta Carboni
- Laboratoire d'Écologie Alpine (LECA), CNRSUniversity of Grenoble AlpesGrenobleFrance
| | - Wayne Dawson
- Department of Biology, EcologyUniversity of KonstanzKonstanzGermany
- Department of BiosciencesDurham UniversityDurhamUK
| | - Franz Essl
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
| | - Andreas Gattringer
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
| | - Emily Haeuser
- Department of Biology, EcologyUniversity of KonstanzKonstanzGermany
| | - Mark van Kleunen
- Department of Biology, EcologyUniversity of KonstanzKonstanzGermany
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhouChina
| | - Holger Kreft
- Biodiversity, Macroecology & BiogeographyUniversity of GoettingenGöttingenGermany
| | - Dietmar Moser
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
| | - Jan Pergl
- Department of Invasion EcologyInstitute of BotanyThe Czech Academy of SciencesPrůhoniceCzech Republic
| | - Petr Pyšek
- Department of Invasion EcologyInstitute of BotanyThe Czech Academy of SciencesPrůhoniceCzech Republic
- Department of EcologyFaculty of ScienceCharles UniversityPragueCzech Republic
| | - Wilfried Thuiller
- Laboratoire d'Écologie Alpine (LECA), CNRSUniversity of Grenoble AlpesGrenobleFrance
| | - Patrick Weigelt
- Biodiversity, Macroecology & BiogeographyUniversity of GoettingenGöttingenGermany
| | - Marten Winter
- German Centre for Integrative Biodiversity Research (iDiv)Halle‐Jena‐LeipzigLeipzigGermany
| | - Stefan Dullinger
- Department of Botany and Biodiversity ResearchFaculty of Life SciencesUniversity of ViennaViennaAustria
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176
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Fraimout A, Debat V, Fellous S, Hufbauer RA, Foucaud J, Pudlo P, Marin JM, Price DK, Cattel J, Chen X, Deprá M, François Duyck P, Guedot C, Kenis M, Kimura MT, Loeb G, Loiseau A, Martinez-Sañudo I, Pascual M, Polihronakis Richmond M, Shearer P, Singh N, Tamura K, Xuéreb A, Zhang J, Estoup A. Deciphering the Routes of invasion of Drosophila suzukii by Means of ABC Random Forest. Mol Biol Evol 2017; 34:980-996. [PMID: 28122970 PMCID: PMC5400373 DOI: 10.1093/molbev/msx050] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Deciphering invasion routes from molecular data is crucial to understanding biological invasions, including identifying bottlenecks in population size and admixture among distinct populations. Here, we unravel the invasion routes of the invasive pest Drosophila suzukii using a multi-locus microsatellite dataset (25 loci on 23 worldwide sampling locations). To do this, we use approximate Bayesian computation (ABC), which has improved the reconstruction of invasion routes, but can be computationally expensive. We use our study to illustrate the use of a new, more efficient, ABC method, ABC random forest (ABC-RF) and compare it to a standard ABC method (ABC-LDA). We find that Japan emerges as the most probable source of the earliest recorded invasion into Hawaii. Southeast China and Hawaii together are the most probable sources of populations in western North America, which then in turn served as sources for those in eastern North America. European populations are genetically more homogeneous than North American populations, and their most probable source is northeast China, with evidence of limited gene flow from the eastern US as well. All introduced populations passed through bottlenecks, and analyses reveal five distinct admixture events. These findings can inform hypotheses concerning how this species evolved between different and independent source and invasive populations. Methodological comparisons indicate that ABC-RF and ABC-LDA show concordant results if ABC-LDA is based on a large number of simulated datasets but that ABC-RF out-performs ABC-LDA when using a comparable and more manageable number of simulated datasets, especially when analyzing complex introduction scenarios.
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Affiliation(s)
- Antoine Fraimout
- Institut de Systématique, Évolution, Biodiversité, ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, Paris, France
| | - Vincent Debat
- Institut de Systématique, Évolution, Biodiversité, ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, Paris, France
| | - Simon Fellous
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France
| | - Ruth A Hufbauer
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France.,Colorado State University, Fort Collins, CO
| | - Julien Foucaud
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France
| | - Pierre Pudlo
- Centre de Mathématiques et Informatique, Aix-Marseille Université, Marseille, France
| | - Jean-Michel Marin
- Institut Montpelliérain Alexander Grothendieck, Université de Montpellier, Montpellier, France
| | - Donald K Price
- Tropical Conservation Biology & Environmental Science, University of Hawaii at Hilo, HI
| | - Julien Cattel
- Laboratoire de Biométrie et Biologie Evolutive, UMR CNRS 5558, Université Claude Bernard Lyon 1, Villeurbanne, France
| | - Xiao Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, Yunnan Province, People's Republic of China
| | - Marindia Deprá
- Programa de Pós Graduação em Genética e Biologia Molecular, Programa de Pós Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | | | - Masahito T Kimura
- Graduate School of Environmental Earth Science, Hokkaido Daigaku University, Sapporo, Hokkaido Prefecture, Japan
| | - Gregory Loeb
- Department of Entomology, Cornell University, Ithaca, NY
| | - Anne Loiseau
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France
| | - Isabel Martinez-Sañudo
- Dipartimento di Agronomia Animali Alimenti Risorse Naturali e Ambiente, Universita degli Studi di Padova, Padova, Italy
| | - Marta Pascual
- Departament de Genètica, Universitat de Barcelona, Barcelona, Spain
| | | | - Peter Shearer
- Mid-Columbia Agricultural Research and Extension Center, Oregon State University, Hood River, OR
| | - Nadia Singh
- Department of Genetics, North Carolina State University, Raleigh, NC
| | - Koichiro Tamura
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Anne Xuéreb
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France
| | - Jinping Zhang
- MoA-CABI Joint Laboratory for Bio-safety, Chinese Academy of Agricultural Sciences, BeiXiaGuan, Haidian Qu, China
| | - Arnaud Estoup
- INRA, Centre de Biologie et de Gestion des Populations (UMR INRA IRD Cirad Montpellier SupAgro), Montferrier-Sur-Lez, France
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177
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Pertierra LR, Aragón P, Shaw JD, Bergstrom DM, Terauds A, Olalla-Tárraga MÁ. Global thermal niche models of two European grasses show high invasion risks in Antarctica. GLOBAL CHANGE BIOLOGY 2017; 23:2863-2873. [PMID: 27976462 DOI: 10.1111/gcb.13596] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/28/2016] [Accepted: 12/03/2016] [Indexed: 06/06/2023]
Abstract
The two non-native grasses that have established long-term populations in Antarctica (Poa pratensis and Poa annua) were studied from a global multidimensional thermal niche perspective to address the biological invasion risk to Antarctica. These two species exhibit contrasting introduction histories and reproductive strategies and represent two referential case studies of biological invasion processes. We used a multistep process with a range of species distribution modelling techniques (ecological niche factor analysis, multidimensional envelopes, distance/entropy algorithms) together with a suite of thermoclimatic variables, to characterize the potential ranges of these species. Their native bioclimatic thermal envelopes in Eurasia, together with the different naturalized populations across continents, were compared next. The potential niche of P. pratensis was wider at the cold extremes; however, P. annua life history attributes enable it to be a more successful colonizer. We observe that particularly cold summers are a key aspect of the unique Antarctic environment. In consequence, ruderals such as P. annua can quickly expand under such harsh conditions, whereas the more stress-tolerant P. pratensis endures and persist through steady growth. Compiled data on human pressure at the Antarctic Peninsula allowed us to provide site-specific biosecurity risk indicators. We conclude that several areas across the region are vulnerable to invasions from these and other similar species. This can only be visualized in species distribution models (SDMs) when accounting for founder populations that reveal nonanalogous conditions. Results reinforce the need for strict management practices to minimize introductions. Furthermore, our novel set of temperature-based bioclimatic GIS layers for ice-free terrestrial Antarctica provide a mechanism for regional and global species distribution models to be built for other potentially invasive species.
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Affiliation(s)
- Luis R Pertierra
- Área de Biodiversidad, Department de Biología, Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, C/Tulipán S/N, Móstoles, Madrid, 28933, Spain
| | - Pedro Aragón
- Department de Biogeografía y Cambio Global, Museo Nacional de Ciencias Naturales, C/José Abascal 2, Madrid, Madrid, 28006, Spain
| | - Justine D Shaw
- Antarctic Conservation and Management, Australian Antarctic Division, 203 Channel Hwy, Kingston, TAS, 7050, Australia
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, The University of Queensland, St Lucia, Qld, 4072, Australia
| | - Dana M Bergstrom
- Antarctic Conservation and Management, Australian Antarctic Division, 203 Channel Hwy, Kingston, TAS, 7050, Australia
| | - Aleks Terauds
- Antarctic Conservation and Management, Australian Antarctic Division, 203 Channel Hwy, Kingston, TAS, 7050, Australia
| | - Miguel Ángel Olalla-Tárraga
- Área de Biodiversidad, Department de Biología, Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, C/Tulipán S/N, Móstoles, Madrid, 28933, Spain
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178
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Závada T, Malik RJ, Kesseli RV. Population structure in chicory ( Cichorium intybus): A successful U.S. weed since the American revolutionary war. Ecol Evol 2017. [PMID: 28649334 PMCID: PMC5478081 DOI: 10.1002/ece3.2994] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Plant invasions are recognized as major drivers of ecosystem change, yet the precise cause of these invasions remains unknown for many species. Frequency and modes of introductions during the first, transport and colonization, stages of the invasion process as well as phenotypic changes due to plasticity or changing genetic diversity and adaptation during later establishment and expansion stages can all influence the "success" of invasion. Here, we examine some of these factors in, and the origin of, a very successful weed, Cichorium intybus (chicory) which was introduced to North America in the 18th century and which now can be found in all 48 continental U.S. states and much of Canada. We genotyped a Eurasian collection of 11 chicory cultivars, nine native populations and a North American collection of 20 introduced wild populations which span the species range (592 individuals in total). To detect the geographic sources of North American chicory populations and to assess the genetic diversity among cultivars, native, and introduced populations, we used both a sequenced cpDNA region and 12 nuclear simple sequence repeat (SSR), microsatellite loci. Four cpDNA haplotypes were identified and revealed clear geographic subdivisions in the chicory native range and an interspecific hybrid origin of Radicchio group. Nuclear data suggested that domesticated lines deliberately introduced to North America were major contributors to extant weedy populations, although unintended sources such as seed contaminants likely also played important roles. The high private allelic richness and novel genetic groups were detected in some introduced populations, suggesting the potential for local adaptation in natural sites such as deserts and nature reserves. Our findings suggest that the current populations of weedy U.S. chicory have evolved primarily from several sources of domesticated and weedy ancestors and subsequent admixture among escaped lineages.
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Affiliation(s)
- Tomáš Závada
- Biology Department University of Massachusetts Boston Boston MA USA.,Present address: Sterling College Craftsbury Common VT USA and
| | - Rondy J Malik
- Biology Department University of Massachusetts Boston Boston MA USA.,Present address: Department of Ecosystem Science and Management Pennsylvania State University University Park PA USA
| | - Rick V Kesseli
- Biology Department University of Massachusetts Boston Boston MA USA
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179
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Wavrek M, Heberling JM, Fei S, Kalisz S. Herbaceous invaders in temperate forests: a systematic review of their ecology and proposed mechanisms of invasion. Biol Invasions 2017. [DOI: 10.1007/s10530-017-1456-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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180
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Wronski T, Bariyanga JD, Sun P, Plath M, Apio A. Pastoralism versus Agriculturalism-How Do Altered Land-Use Forms Affect the Spread of Invasive Plants in the Degraded Mutara Rangelands of North-Eastern Rwanda? PLANTS (BASEL, SWITZERLAND) 2017; 6:E19. [PMID: 28498334 PMCID: PMC5489791 DOI: 10.3390/plants6020019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/12/2017] [Accepted: 05/08/2017] [Indexed: 11/19/2022]
Abstract
Lantana camara L. (Verbenaceae) originates from tropical Central and South America and has become invasive in about 50 countries. It causes problems when invading rangelands due to its toxicity to livestock and its tendency to form dense, monotonous thickets. Its invasiveness can partly be explained by the high tannin content largely protecting the species from being browsed, its tolerance to a wide range of environmental conditions, as well as its general preference for anthropogenically disturbed habitats. The dispersal of L. camara is facilitated by birds and other animals consuming its drupes (endozoochory), and so both wild and domestic ungulates could contribute to its spread. In our study, we investigated the distribution of L. camara in the Mutara rangelands of north-eastern Rwanda, an area that faced dramatic landscape changes in recent decades. We assessed 23 ecological factors and factors related to land-use and conservation-political history. Major effects on the local abundance of L. camara were found in that the relative canopy cover of L. camara was negatively correlated with the occurrence of other shrubs (suggesting competition for space and nutrients), while encounter rates of houses, 'living fences' (Euphorbia tirucalli L.) and cattle tracks were positively correlated with L. camara cover. Hence, the spread of non-native L. camara in the Mutara rangelands appears to be linked to landscape alterations arising from the transformation of rangelands supporting traditional pastoralist communities to other agricultural land-use forms.
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Affiliation(s)
- Torsten Wronski
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
- Faculty of Science, School of Natural Sciences and Psychology, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
| | - Jean Damascene Bariyanga
- Department of Biology, College of Science and Technology, School of Science, University of Rwanda, P.O. Box 117, Huye, Rwanda.
| | - Ping Sun
- Department of Biology, College of Science and Technology, School of Science, University of Rwanda, P.O. Box 117, Huye, Rwanda.
| | - Martin Plath
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
| | - Ann Apio
- Jomo Kenyatta University of Agriculture and Technology, Kigali Campus, P.O. Box 3373, Kigali, Rwanda.
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181
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Suzuki-Ohno Y, Morita K, Nagata N, Mori H, Abe S, Makino T, Kawata M. Factors restricting the range expansion of the invasive green anole Anolis carolinensis on Okinawa Island, Japan. Ecol Evol 2017. [PMID: 28649347 PMCID: PMC5478079 DOI: 10.1002/ece3.3002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The green anole Anolis carolinensis invaded the Ogasawara Islands in Japan, drove various native species to extinction, and its distribution expanded 14 years after initial establishment. A. carolinensis invaded Okinawa Island, but it has not expanded its distribution in more than 25 years, although its density is extremely high in the southern region. To determine whether A. carolinensis has the potential to expand its distribution on Okinawa Island, we performed phylogenetic analysis of mitochondrial ND2 DNA sequences to study the origin of A. carolinensis that invaded Okinawa Island. We further used a species distribution model (MaxEnt) based on the distribution of native populations in North America to identify ecologically suitable areas on Okinawa Island. Nucleotide sequence analysis shows that the invader A. carolinensis originated in the western part of the Gulf Coast and inland areas of the United States and that a portion of the anoles on Okinawa was not introduced via the Ogasawara Islands. The MaxEnt predictions indicate that most areas in Okinawa Island are suitable for A. carolinensis. Therefore, A. carolinensis may have the potential to expand its distribution in Okinawa Island. The predictions indicate that habitat suitability is high in areas of high annual mean temperature and urbanized areas. The values of precipitation in summer in the northern region of Okinawa Island were higher compared with those of North America, which reduced the habitat suitability in Okinawa Island. Adaptation to low temperatures, an increase in the mean temperature through global warming, and an increase in open environments through land development will likely expand the distribution of A. carolinensis in Okinawa Island. Therefore, we must continue to monitor the introduced populations and be alert to the possibility that city planning that increases open environments may cause their range to expand.
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Affiliation(s)
- Yukari Suzuki-Ohno
- Department of Ecology and Evolutionary Biology Graduate School of Life Sciences Tohoku University Sendai Miyagi Japan
| | - Kenjiro Morita
- Department of Ecology and Evolutionary Biology Graduate School of Life Sciences Tohoku University Sendai Miyagi Japan
| | - Nobuaki Nagata
- Department of Ecology and Evolutionary Biology Graduate School of Life Sciences Tohoku University Sendai Miyagi Japan
| | - Hideaki Mori
- Ogasawara Division Japan Wildlife Research Center Tokyo Japan
| | - Shintaro Abe
- Naha Nature Conservation Office Ministry of the Environment Naha Okinawa Japan
| | - Takashi Makino
- Department of Ecology and Evolutionary Biology Graduate School of Life Sciences Tohoku University Sendai Miyagi Japan
| | - Masakado Kawata
- Department of Ecology and Evolutionary Biology Graduate School of Life Sciences Tohoku University Sendai Miyagi Japan
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182
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Genetic Diversity in Relict and Fragmented Populations of Ulmus glabra Hudson in the Central System of the Iberian Peninsula. FORESTS 2017. [DOI: 10.3390/f8050143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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183
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Yang M, He Z, Huang Y, Lu L, Yan Y, Hong L, Shen H, Liu Y, Guo Q, Jiang L, Zhang Y, Greenberg AJ, Zhou R, Ge X, Wu CI, Shi S. The emergence of the hyperinvasive vine, Mikania micrantha (Asteraceae), via admixture and founder events inferred from population transcriptomics. Mol Ecol 2017; 26:3405-3423. [PMID: 28370790 DOI: 10.1111/mec.14124] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 03/20/2017] [Accepted: 03/21/2017] [Indexed: 01/14/2023]
Abstract
Biological invasions that involve well-documented rapid adaptations to new environments provide unequalled opportunities for testing evolutionary hypotheses. Mikania micrantha Kunth (Asteraceae), a perennial herbaceous vine native to tropical Central and South America, successfully invaded tropical Asia in the early 20th century. It is regarded as one of the most aggressive weeds in the world. To elucidate the molecular and evolutionary processes underlying this invasion, we extensively sampled this weed throughout its invaded range in South-East and South Asia and surveyed its genetic structure using variants detected from population transcriptomics. Clustering results suggest that more than one source population contributed to this invasion. Computer simulations using genomewide genetic variation support a scenario of admixture and founder events during invasion. The genes differentially expressed between native and invasive populations were found to be involved in oxidative and high light intensity stress responses, pointing to a possible ecological mechanism of adaptation. Our results provide a foundation for further detailed mechanistic and population studies of this ecologically and economically important invasion. This line of research promises to provide new mitigation strategies for invasive species as well as insights into mechanisms of adaptation.
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Affiliation(s)
- Ming Yang
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Ziwen He
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Yelin Huang
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Lu Lu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Yubin Yan
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Lan Hong
- College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
| | - Hao Shen
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong, China
| | - Ying Liu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Qiang Guo
- Shenzhen Wildlife Protection Administration, Shenzhen, China
| | - Lu Jiang
- Shenzhen Wildlife Protection Administration, Shenzhen, China
| | - Yanwu Zhang
- Shenzhen Wildlife Protection Administration, Shenzhen, China
| | | | - Renchao Zhou
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
| | - Xuejun Ge
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong, China
| | - Chung-I Wu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China.,Department of Ecology and Evolution, University of Chicago, Chicago, IL, USA
| | - Suhua Shi
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, Sun Yat-sen University, Guangzhou, China
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184
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Evolutionary responses to climate change in a range expanding plant. Oecologia 2017; 184:543-554. [PMID: 28409227 PMCID: PMC5487849 DOI: 10.1007/s00442-017-3864-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 04/04/2017] [Indexed: 12/22/2022]
Abstract
To understand the biological effects of climate change, it is essential to take into account species’ evolutionary responses to their changing environments. Ongoing climate change is resulting in species shifting their geographical distribution ranges poleward. We tested whether a successful range expanding plant has rapidly adapted to the regional conditions in its novel range, and whether adaptation could be driven by herbivores. Furthermore, we investigated if enemy release occurred in the newly colonized areas and whether plant origins differed in herbivore resistance. Plants were cloned and reciprocally transplanted between three experimental sites across the range. Effects of herbivores on plant performance were tested by individually caging plants with either open or closed cages. There was no indication of (regional) adaptation to abiotic conditions. Plants originating from the novel range were always larger than plants from the core distribution at all experimental sites, with or without herbivory. Herbivore damage was highest and not lowest at the experimental sites in the novel range, suggesting no release from enemy impact. Genotypes from the core were more damaged compared to genotypes from newly colonized areas at the most northern site in the novel range, which was dominated by generalist slug herbivory. We also detected subtle shifts in chemical defenses between the plant origins. Genotypes from the novel range had more inducible defenses. Our results suggest that plants that are expanding their range with climate change may evolve increased vigor and altered herbivore resistance in their new range, analogous to invasive plants.
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185
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Krojerová-Prokešová J, Barančeková M, Kawata Y, Oshida T, Igota H, Koubek P. Genetic differentiation between introduced Central European sika and source populations in Japan: effects of isolation and demographic events. Biol Invasions 2017. [DOI: 10.1007/s10530-017-1424-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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186
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Sloan DB, Havird JC, Sharbrough J. The on-again, off-again relationship between mitochondrial genomes and species boundaries. Mol Ecol 2017; 26:2212-2236. [PMID: 27997046 PMCID: PMC6534505 DOI: 10.1111/mec.13959] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 11/16/2016] [Accepted: 11/18/2016] [Indexed: 12/12/2022]
Abstract
The study of reproductive isolation and species barriers frequently focuses on mitochondrial genomes and has produced two alternative and almost diametrically opposed narratives. On one hand, mtDNA may be at the forefront of speciation events, with co-evolved mitonuclear interactions responsible for some of the earliest genetic incompatibilities arising among isolated populations. On the other hand, there are numerous cases of introgression of mtDNA across species boundaries even when nuclear gene flow is restricted. We argue that these seemingly contradictory patterns can result from a single underlying cause. Specifically, the accumulation of deleterious mutations in mtDNA creates a problem with two alternative evolutionary solutions. In some cases, compensatory or epistatic changes in the nuclear genome may ameliorate the effects of mitochondrial mutations, thereby establishing coadapted mitonuclear genotypes within populations and forming the basis of reproductive incompatibilities between populations. Alternatively, populations with high mitochondrial mutation loads may be rescued by replacement with a more fit, foreign mitochondrial haplotype. Coupled with many nonadaptive mechanisms of introgression that can preferentially affect cytoplasmic genomes, this form of adaptive introgression may contribute to the widespread discordance between mitochondrial and nuclear genealogies. Here, we review recent advances related to mitochondrial introgression and mitonuclear incompatibilities, including the potential for cointrogression of mtDNA and interacting nuclear genes. We also address an emerging controversy over the classic assumption that selection on mitochondrial genomes is inefficient and discuss the mechanisms that lead lineages down alternative evolutionary paths in response to mitochondrial mutation accumulation.
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Affiliation(s)
- Daniel B Sloan
- Department of Biology, Colorado State University, Fort Collins, CO, 80523, USA
| | - Justin C Havird
- Department of Biology, Colorado State University, Fort Collins, CO, 80523, USA
| | - Joel Sharbrough
- Department of Biology, Colorado State University, Fort Collins, CO, 80523, USA
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187
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188
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Bouhours J, Mesgaran MB, Cousens RD, Lewis MA. Neutral hybridization can overcome a strong Allee effect by improving pollination quality. THEOR ECOL-NETH 2017. [DOI: 10.1007/s12080-017-0333-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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189
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Human disturbance, habitat degradation and niche shift: the case of the endemic Calendula maritima Guss. (W Sicily, Italy). RENDICONTI LINCEI 2017. [DOI: 10.1007/s12210-017-0611-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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190
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Tarkhnishvili D, Murtskhvaladze M, Anderson CL. Coincidence of genotypes at two loci in two parthenogenetic rock lizards: how backcrosses might trigger adaptive speciation. Biol J Linn Soc Lond 2017. [DOI: 10.1093/biolinnean/blw046] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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191
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Barker BS, Andonian K, Swope SM, Luster DG, Dlugosch KM. Population genomic analyses reveal a history of range expansion and trait evolution across the native and invaded range of yellow starthistle (Centaurea solstitialis). Mol Ecol 2017; 26:1131-1147. [PMID: 28029713 DOI: 10.1111/mec.13998] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/11/2016] [Accepted: 12/19/2016] [Indexed: 12/25/2022]
Abstract
Identifying sources of genetic variation and reconstructing invasion routes for non-native introduced species is central to understanding the circumstances under which they may evolve increased invasiveness. In this study, we used genome-wide single nucleotide polymorphisms to study the colonization history of Centaurea solstitialis in its native range in Eurasia and invasions into the Americas. We leveraged this information to pinpoint key evolutionary shifts in plant size, a focal trait associated with invasiveness in this species. Our analyses revealed clear population genomic structure of potential source populations in Eurasia, including deep differentiation of a lineage found in the southern Apennine and Balkan Peninsulas and divergence among populations in Asia, eastern Europe and western Europe. We found strongest support for an evolutionary scenario in which western European populations were derived from an ancient admixture event between populations from eastern Europe and Asia, and subsequently served as the main genetic 'bridgehead' for introductions to the Americas. Introductions to California appear to be from a single source region, and multiple, independent introductions of divergent genotypes likely occurred into the Pacific Northwest. Plant size has evolved significantly at three points during range expansion, including a large size increase in the lineage responsible for the aggressive invasion of the California interior. These results reveal a long history of colonization, admixture and trait evolution in C. solstitialis, and suggest routes for improving evidence-based management decisions for one of the most ecologically and economically damaging invasive species in the western United States.
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Affiliation(s)
- Brittany S Barker
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA
| | - Krikor Andonian
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, 95064, USA
| | - Sarah M Swope
- Department of Biology, Mills College, Oakland, CA, 94613, USA
| | - Douglas G Luster
- USDA-ARS Foreign Disease-Weed Science Research Unit, Ft. Detrick, MD, 21702, USA
| | - Katrina M Dlugosch
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA
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192
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Geng SL, Chen Q, Cai WL, Cao AC, Ou-Yang CB. Genetic variation in the invasive weed Mikania micrantha (Asteraceae) suggests highways as corridors for its dispersal in southern China. ANNALS OF BOTANY 2017; 119:457-464. [PMID: 28028017 PMCID: PMC5314642 DOI: 10.1093/aob/mcw218] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/01/2016] [Accepted: 09/10/2016] [Indexed: 05/24/2023]
Abstract
BACKGROUND AND AIMS Roads as corridors of seed or fruit spatial dispersal have major impacts on the establishment and spread of invasive species, but their precise role in population genetic variation remains poorly understood. The South American weed Mikania micrantha has spread rapidly across southern China since its introduction to the Shenzhen area in 1984. This study investigated how its genetic diversity is distributed along highways, and whether highways have acted as corridors for the rapid expansion of M. micrantha METHODS: Twenty-seven roadside populations were sampled along four highways in southern China, and 787 samples were examined using 12 microsatellite markers. Variation in genetic diversity among populations was quantified and patterns of genetic differentiation were analysed. KEY RESULTS A high level of genetic diversity was found at both the species and the population levels in this self-incompatible plant (expected heterozygosity = 0·497 and 0·477, respectively; allelic richness = 2·580 and 2·521, respectively). The Wright F-statistic value among populations (0·044, P < 0·01) and the analysis of molecular variance (91 % of genetic variation residing within populations, 9 % among populations within highways and 0 % among the four highways) showed a relatively low level of genetic differentiation among populations, while the principal coordinate and cluster analyses also indicated a lack of clear geographical genetic structure among populations. The calculated Nm value of 5·5 signifies strong gene flow. CONCLUSIONS The pattern of genetic variation is consistent with facilitated dispersal along highways. The genetic admixtures among the roadside populations imply the occurrence of multiple population introductions during colonization. The long-distance dispersal of seeds associated with vehicular transportation on highways may have played important roles in shaping the genetic variation. This finding highlights the importance of highways as corridors for the spread of M. micrantha in southern China.
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Affiliation(s)
- Shi-Lei Geng
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Quan Chen
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Wen-Li Cai
- College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Ao-Cheng Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China
| | - Can-Bin Ou-Yang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China
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193
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A molecular approach to understand the riddle of the invasive success of the tarantula, Brachypelma vagans, on Cozumel Island, Mexico. BIOCHEM SYST ECOL 2017. [DOI: 10.1016/j.bse.2016.12.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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194
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Against all odds: reconstructing the evolutionary history of Scrophularia (Scrophulariaceae) despite high levels of incongruence and reticulate evolution. ORG DIVERS EVOL 2017. [DOI: 10.1007/s13127-016-0316-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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195
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Hirsch H, Hensen I, Wesche K, Renison D, Wypior C, Hartmann M, von Wehrden H. Non-native populations of an invasive tree outperform their native conspecifics. AOB PLANTS 2017; 8:plw071. [PMID: 27742647 PMCID: PMC5206335 DOI: 10.1093/aobpla/plw071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 09/20/2016] [Indexed: 05/31/2023]
Abstract
Introduced plants often face new environmental conditions in their non-native ranges. To become invasive, they need to overcome several biotic and abiotic filters that may trigger adaptive changes in life-history traits, like post-germination processes. Such early life cycle traits may play a crucial role in the colonization and establishment success of invasive plants. As a previous study revealed that seeds of non-native populations of the woody Siberian elm, Ulmus pumila, germinated faster than those of native populations, we expected growth performance of seedlings to mirror this finding. Here, we conducted a common garden greenhouse experiment using different temperature and watering treatments to compare the biomass production of U. pumila seedlings derived from 7 native and 13 populations from two non-native ranges. Our results showed that under all treatments, non-native populations were characterized by higher biomass production and enhanced resource allocation to aboveground biomass compared to the native populations. The observed enhanced growth performance of non-native populations might be one of the contributing factors for the invasion success of U. pumila due to competitive advantages during the colonization of new sites.
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Affiliation(s)
- Heidi Hirsch
- Department of Botany and Zoology, Centre for Invasion Biology, Stellenbosch University, Matieland, South Africa
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Isabell Hensen
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Karsten Wesche
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Senckenberg Museum of Natural History Goerlitz, Am Museum 1, 02826 Goerlitz, Germany
| | - Daniel Renison
- Centro de Ecología y Recursos Naturales Renovables - Dr. Ricardo Luti (CERNAR - FCEFyN - UNC) and Instituto de Investigaciones Biológicas y Tecnológicas (IIByT - CONICET - UNC), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina
| | - Catherina Wypior
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Matthias Hartmann
- Herbarium PRC & Department of Botany, Charles University in Prague, Benátská 2, 12801 Praha, Czech Republic
| | - Henrik von Wehrden
- Institute of Ecology/Faculty of Sustainability, Centre of Methods, Leuphana University, Scharnhorststraße 1, 21335 Lueneburg, Germany
- Research Institute of Wildlife Ecology, Savoyen Strasse 1, 1160 Vienna, Austria
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196
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Ortego J, Gugger PF, Sork VL. Impacts of human-induced environmental disturbances on hybridization between two ecologically differentiated Californian oak species. THE NEW PHYTOLOGIST 2017; 213:942-955. [PMID: 27621132 DOI: 10.1111/nph.14182] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/04/2016] [Indexed: 05/15/2023]
Abstract
Natural hybridization, which can be involved in local adaptation and in speciation processes, has been linked to different sources of anthropogenic disturbance. Here, we use genotypic data to study range-wide patterns of genetic admixture between the serpentine-soil specialist leather oak (Quercus durata) and the widespread Californian scrub oak (Quercus berberidifolia). First, we estimated hybridization rates and the direction of gene flow. Second, we tested the hypothesis that genetic admixture increases with different sources of environmental disturbance, namely anthropogenic destruction of natural habitats and wildfire frequency estimated from long-term records of fire occurrence. Our analyses indicate considerable rates of hybridization (> 25%), asymmetric gene flow from Q. durata into Q. berberidifolia, and a higher occurrence of hybrids in areas where both species live in close parapatry. In accordance with the environmental disturbance hypothesis, we found that genetic admixture increases with wildfire frequency, but we did not find a significant effect of other sources of human-induced habitat alteration (urbanization, land clearing for agriculture) or a suite of ecological factors (climate, elevation, soil type). Our findings highlight that wildfires constitute an important source of environmental disturbance, promoting hybridization between two ecologically well-differentiated native species.
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Affiliation(s)
- Joaquín Ortego
- Department of Integrative Ecology, Estación Biológica de Doñana, EBD-CSIC, Avda. Américo Vespucio s/n, E-41092, Seville, Spain
| | - Paul F Gugger
- Appalachian Laboratory, University of Maryland Center for Environmental Science, 301 Braddock Road, Frostburg, MD, 21532, USA
| | - Victoria L Sork
- Department of Ecology and Evolutionary Biology, University of California, Box 957239, Los Angeles, CA, 90095, USA
- Institute of the Environment and Sustainability, University of California, Box 951496, Los Angeles, CA, 90095-1496, USA
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197
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Li M, Chen S, Zhou R, Fan Q, Li F, Liao W. Molecular Evidence for Natural Hybridization between Cotoneaster dielsianus and C. glaucophyllus. FRONTIERS IN PLANT SCIENCE 2017; 8:704. [PMID: 28536587 PMCID: PMC5422516 DOI: 10.3389/fpls.2017.00704] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/18/2017] [Indexed: 05/06/2023]
Abstract
Hybridization accompanied by polyploidization and apomixis has been demonstrated as a driving force in the evolution and speciation of many plants. A good example to study the evolutionary process of hybridization associated with polyploidy and apomixis is the genus Cotoneaster (Rosaceae), which includes approximately 150 species, most of which are polyploid apomicts. In this study, we investigated all Cotoneaster taxa distributed in a small region of Malipo, Yunnan, China. Based on the morphological characteristics, four Cotoneaster taxa were identified and sampled: C. dielsianus, C. glaucophyllus, C. franchetii, and a putative hybrid. Flow cytometry analyses showed that C. glaucophyllus was diploid, while the other three taxa were tetraploid. A total of five low-copy nuclear genes and six chloroplast regions were sequenced to validate the status of the putative hybrid. Sequence analyses showed that C. dielsianus and C. glaucophyllus are distantly related and they could be well separated using totally 50 fixed nucleotide substitutions and four fixed indels at the 11 investigated genes. All individuals of the putative hybrid harbored identical sequences: they showed chromatogram additivity for all fixed differences between C. dielsianus and C. glaucophyllus at the five nuclear genes, and were identical with C. glaucophyllus at the six chloroplast regions. Haplotype analysis revealed that C. dielsianus possessed nine haplotypes for the 11 genes, while C. glaucophyllus had ten, and there were no shared haplotypes between the two species. The putative hybrid harbored two haplotypes for each nuclear gene: one shared with C. dielsianus and the other with C. glaucophyllus. They possessed the same chloroplast haplotype with C. glaucophyllus. Our study provided convincing evidence for natural hybridization between C. dielsianus and C. glaucophyllus, and revealed that all hybrid individuals were derivatives of one initial F1 via apomixes. C. glaucophyllus served as the maternal parent at the initial hybridization event. We proposed that anthropological disturbance provided an opportunity for hybridization between C. dielsianus and C. glaucophyllus, and a tetraploid F1 successfully bred many identical progenies via apomixis. Under this situation, species integrity could be maintained for these Cotoneaster species, but attentions should be kept for this new-born hybrid.
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Affiliation(s)
- Mingwan Li
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Sufang Chen
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
- *Correspondence: Sufang Chen
| | - Renchao Zhou
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Qiang Fan
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
| | - Feifei Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental SciencesBeijing, China
- College of Life and Environmental Sciences, Minzu University of ChinaBeijing, China
- Feifei Li
| | - Wenbo Liao
- Guangdong Key Laboratory of Plant Resources, Key Laboratory of Biodiversity Dynamics, Conservation of Guangdong Higher Education Institutes, Sun Yat-sen UniversityGuangzhou, China
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198
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Zenni RD, Dickie IA, Wingfield MJ, Hirsch H, Crous CJ, Meyerson LA, Burgess TI, Zimmermann TG, Klock MM, Siemann E, Erfmeier A, Aragon R, Montti L, Le Roux JJ. Evolutionary dynamics of tree invasions: complementing the unified framework for biological invasions. AOB PLANTS 2016; 9:plw085. [PMID: 28039118 PMCID: PMC5391705 DOI: 10.1093/aobpla/plw085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/09/2016] [Accepted: 11/16/2016] [Indexed: 05/24/2023]
Abstract
Evolutionary processes greatly impact the outcomes of biological invasions. An extensive body of research suggests that invasive populations often undergo phenotypic and ecological divergence from their native sources. Evolution also operates at different and distinct stages during the invasion process. Thus, it is important to incorporate evolutionary change into frameworks of biological invasions because it allows us to conceptualize how these processes may facilitate or hinder invasion success. Here, we review such processes, with an emphasis on tree invasions, and place them in the context of the unified framework for biological invasions. The processes and mechanisms described are pre-introduction evolutionary history, sampling effect, founder effect, genotype-by-environment interactions, admixture, hybridization, polyploidization, rapid evolution, epigenetics, and second-genomes. For the last, we propose that co-evolved symbionts, both beneficial and harmful, which are closely physiologically associated with invasive species, contain critical genetic traits that affect the evolutionary dynamics of biological invasions. By understanding the mechanisms underlying invasion success, researchers will be better equipped to predict, understand, and manage biological invasions.
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Affiliation(s)
- Rafael Dudeque Zenni
- Setor de Ecologia, Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brazil. Programa de Pós-Graduação em Ecologia Aplicada, Caixa Postal 3037, CEP 37200-000 - Lavras-MG - Brazil
| | - Ian A Dickie
- Bio-protection Research Centre, Lincoln University, Lincoln 7647, New Zealand
| | - Michael J Wingfield
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Heidi Hirsch
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - Casparus J Crous
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
- Centre for Ecology, Evolution and Environmental Changes, Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal
| | - Laura A Meyerson
- Department of Natural Resources Science, University of Rhode Island, Kingston, RI, USA
| | - Treena I Burgess
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, 6150 Australia
| | - Thalita G Zimmermann
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Metha M Klock
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Evan Siemann
- Biosciences Department, Rice University, Houston, TX, USA
| | | | - Roxana Aragon
- Instituto de Ecologia Regional, Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, CONICET. Tucuman, Argentina
| | - Lia Montti
- Instituto de Ecologia Regional, Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, CONICET. Tucuman, Argentina
| | - Johannes J Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
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199
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Gaskin JF. The role of hybridization in facilitating tree invasion. AOB PLANTS 2016; 9:plw079. [PMID: 28028055 PMCID: PMC5391693 DOI: 10.1093/aobpla/plw079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 08/29/2016] [Accepted: 11/10/2016] [Indexed: 05/31/2023]
Abstract
Hybridization events can generate additional genetic diversity upon which natural selection can act and at times enhance invasiveness of the species. Invasive tree species are a growing ecological concern worldwide, and some of these invasions involve hybridization events pre- or post-introduction. There are 20 hybrid invasive tree taxa in 15 genera (11 plant families) discussed here. When reported, abundance of hybrids comprised 10-100% of an invasion, the remainder being parental taxa. In seven hybrid taxa researchers identified phenotypes that may make hybrids better invaders. Twelve hybrid tree taxa involved introgression and more hybrids involved all non-native taxa than native x non-native taxa. Three hybrid tree taxa were the result of intentional crosses and all hybrid taxa involved intentional introduction of either one or more parental taxon or the hybrid itself. The knowledge gaps present in some hybrid tree taxa can weaken our effectiveness in predicting and controlling invasions, as hybrids can add a level of complexity to an invasion by being morphologically cryptic, causing genetic pollution of a native parental taxon, presenting novel genotypes for which there may not be coevolved biological control agents, or evolving adaptive traits through increased genetic variation.
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Affiliation(s)
- John F Gaskin
- USDA Agricultural Research Service, 1500 North Central Avenue, Sidney, Montana, USA 59270
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