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76 results for “native invader”
Data from: Population genomic analyses reveal a history of range expansion and trait evolution across the native and invaded range of yellow starthistle (Centaurea solstitialis)
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 California's 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.
Data from: More invaders do not result in heavier impacts: the effects of nonnative bullfrogs on native anurans are mitigated by high densities of nonnative crayfish
1.With accelerating species introductions in an era of globalization, co-occurring alien species have become increasingly common. Understanding the combined ecological impacts of multiple invaders is not only crucial for wildlife managers attempting to ameliorate biodiversity loss but also provides key insights into invasion success and species coexistence mechanisms in natural ecosystems. Compared with much attentions given to single invader impacts, little is known about the impacts of multiple co-occurring invaders. 2.The American bullfrog (Lithobates catesbeianus = Rana catesbeiana) and the red swamp crayfish (Procambarus clarkii) are two aquatic invasive species in many different areas of the globe. They co-exist with native anurans in a variety of permanent lentic waters, which provide an ideal model system to explore the combined effects of multiple invaders from different trophic levels on native species. 3.Based on a global diet analysis covering 34 native and invasive bullfrog populations, and data from 10-year field surveys across 157 water bodies in the Zhoushan Archipelago, China, we observed a reduced impact of bullfrogs on native anurans at high crayfish densities when the two invaders co-occurred. 4.The global diet analysis showed that crayfish occurrence reduced the number of native anuran prey consumed by bullfrogs in both native and invasive populations. After accounting for pseudoreplication of different observations among water bodies, islands, and survey time, model averaging analyses based on generalized linear mixed models (GLMMs) showed a negative relationship between bullfrog density and native anuran densities for field observations of invasive bullfrogs alone and co-invaded observations with low crayfish density. However, this negative relationship disappeared when the two invaders co-occurred with high crayfish density. Structural equation modeling (SEM) analyses further validated that the impacts of bullfrogs on native frogs were mitigated by the negative interactions between crayfish and bullfrogs. 5.Our results provide novel evidence of a density-dependent antagonistic effect of two sympatric invaders from different trophic levels on native species. This study highlights the importance of considering complex interactions among co-invaders and native species when prioritizing conservation and management actions and will facilitate the development of a more precise framework to predict invasion impacts.
Data from: Twin introductions by independent invader mussel lineages are both associated with recent admixture with a native congener in Australia
Introduced species can impose profound impacts on the evolution of receiving communities with which they interact. If native and introduced taxa remain reproductively semi-isolated, human-mediated secondary contact may promote genetic exchange across newly created hybrid zones, potentially impacting native genetic diversity and invasive species spread. Here, we investigate the contributions of recent divergence histories and ongoing (post-introduction) gene flow between the invasive marine mussel, Mytilus galloprovincialis and a morphologically indistinguishable and taxonomically contentious native Australian taxon, Mytilus planulatus. Using transcriptome-wide markers, we demonstrate that two contemporary M. galloprovincialis introductions into southeastern Australia originate from genetically divergent lineages from its native range in the Mediterranean Sea and Atlantic Europe, where both introductions have led to repeated instances of admixture between introduced and endemic populations. Through increased genome-wide resolution of species relationships, combined with demographic modelling, we validate that mussels sampled in Tasmania are representative of the endemic Australian taxon (M. planulatus), but share strong genetic affinities to M. galloprovincialis. Demographic inferences indicate late-Pleistocene divergence times and historical gene flow between the Tasmanian endemic lineage and northern M. galloprovincialis, suggesting that native and introduced taxa have experienced a period of historical isolation of at least 100,000 years. Our results demonstrate that many genomic loci and sufficient sampling of closely related lineages in both sympatric (e.g., Australian populations) and allopatric (e.g., northern-hemisphere Mytilus taxa) ranges are necessary to accurately (i) interpret patterns of intraspecific differentiation and to (ii) distinguish contemporary invasive introgression from signatures left by recent divergence histories in high dispersal marine species. More broadly, our study fills a significant gap in systematic knowledge of native Australian biodiversity and sheds light on the intrinsic challenges for invasive species research when native and introduced species boundaries are not well-defined.
Populations of a widespread invader and co-occurring native species vary in phenotypic plasticity
<p class="MsoListBulletCxSpFirst"><span>Phenotypic plasticity can promote plant invasions and enhance impacts on native species but little is known about variation in plasticity among invader populations compared to native species. Variation in plasticity among invader populations could inform more precise predictions of invader spread and impacts across heterogeneous resource environments.</span></p> <p class="MsoListBulletCxSpMiddle"><span> We used a common garden experiment with sun and shade treatments to test for variation in plasticity among 12 populations of an invasive grass, and to determine if the invader exhibited greater plasticity than six native species that co-occur in the Southeast US.</span></p> <p class="MsoListBulletCxSpMiddle"><span>Principal component analysis revealed that invader populations from different native ranges consistently varied from each other and native species in traits linked to more favorable phenotypes under resource limitation. Overall, the invader exhibited greater plasticity than native species, as demonstrated by higher plasticity index values for traits such as plant height, leaf mass ratio, and root shoot ratio.</span></p> <p class="MsoListBulletCxSpLast"><span>Variation in phenotypic plasticity among invader<i> </i>populations suggests the potential for evolution of plasticity, and greater plasticity of invader populations than native species may underlie invader dominance. Differences in plasticity among populations appears to play an important role in predictions of the spread and potentially the impacts of invasive species.</span></p>
Effects of time since invasion and control actions on a coastal ecosystem invaded by non-native pine trees
<p><span>Invasive non-native trees cause structural and functional changes in plant communities, which tend to </span><span>increase over time since invasion. Native vegetation responses after control operations provide important information for restoration.</span></p> <p><span>We evaluated the effects of time since invasion and of pine control on plant community structure and on functional traits in a </span><span>coastal open ecosystem in southern Brazil</span><span>. We compared richness, diversity, abundance and cover of woody and non-woody native plant species, as well as species composition and community-weighted means (CWM)</span> <span>based on functional traits (</span><span>dispersal syndrome, fruit type, maximum height, and shade tolerance) of plant communities</span><span>, in four conditions: a non-invaded area, an area where pines were controlled (managed area), an area of recent invasion, and an area invaded longer ago.</span></p> <p><span>Woody species abundance, richness and diversity declined over time since invasion. However, while abundance recovered to the point of not differing from the non-invaded condition in areas where pines were controlled, species diversity and richness were lower in the managed area than in the area that was never invaded. The effects of pine invasion on richness and diversity of non-woody plants did not increase over time, but plant cover progressively diminished. </span></p> <p><span>Woody and non-woody species composition varied between the four conditions. Species composition similarity was lower between conditions for non-woody than for woody species. CWM differed between the older invasion and the other conditions, determined especially by native plant height and shade tolerance. Taller plants and m</span><span>ore shade tolerant native species were exclusively sampled in the older invasion.</span></p> <p><span>Synthesis and application. Pine invasion reduced species abundance, plant cover, richness, and diversity, altering the composition of plant community. The escalation of negative temporal effects of pine invasion was observed on the composition of woody and non-woody species and on functional traits. Although pine control favored the natural regeneration of non-woody species, diversity of woody species in the area submitted to pine control was lower than in the non-invaded condition. Restoration activities are therefore required to increase woody species diversity. These results provide relevant guidance for the restoration of coastal ecosystems following invasive pine control. </span></p>
Supplementary material 1 from: Krivak-Tetley FE, Sullivan-Stack J, Garnas JR, Zylstra KE, Höger L-O, Lombardero MJ, Liebhold AM, Ayres MP (2022) Demography of an invading forest insect reunited with hosts and parasitoids from its native range. NeoBiota 72: 81-107. https://doi.org/10.3897/neobiota.72.75392
Tables S1, S2, Figures S1–S4
Supplementary material 1 from: Del Rio-Hortega L, Martín-Forés I, Castro I, De Miguel JM, Acosta-Gallo B (2022) Network-based analysis reveals differences in plant assembly between the native and the invaded ranges. NeoBiota 72: 157-181. https://doi.org/10.3897/neobiota.72.72066
Table S1. Species ID for each country and type of species
Supplementary material 1 from: Chen D, van Kleunen M (2022) Competitive effects of plant invaders on and their responses to native species assemblages change over time. NeoBiota 73: 19-37. https://doi.org/10.3897/neobiota.73.80410
Table S1–S6, Figs S1–S3
Supplementary material 1 from: Cocos D, Klapwijk MJ, Schroeder M (2023) Tree species preference and impact on native species community by the bark beetle Ips amitinus in a recently invaded region. In: Jactel H, Orazio C, Robinet C, Douma JC, Santini A, Battisti A, Branco M, Seehausen L, Kenis M (Eds) Conceptual and technical innovations to better manage invasions of alien pests and pathogens in forests. NeoBiota 84: 349-367. https://doi.org/10.3897/neobiota.84.86586
Ips amitinus description, table S1
Data from: More invaders do not result in heavier impacts: the effects of nonnative bullfrogs on native anurans are mitigated by high densities of nonnative crayfish
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Data from: Get smart: native mammal develops toad-smart behavior in response to a toxic invader
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Data from: Twin introductions by independent invader mussel lineages are both associated with recent admixture with a native congener in Australia
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Behavioural plasticity in a native species is related to foraging resilience in the presence of an aggressive invader
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Populations of a widespread invader and co-occurring native species vary in phenotypic plasticity
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Effects of time since invasion and control actions on a coastal ecosystem invaded by non-native pine trees
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Data from: Population genomic analyses reveal a history of range expansion and trait evolution across the native and invaded range of yellow starthistle (Centaurea solstitialis)
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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