Scale invariance in the spatial-dynamics of biological invasions

Liebhold, Andrew M.; Keitt, Timothy H.; Goel, Nikunj; Bertelsmeier, Cléo

doi:10.3897/neobiota.62.53213

Cited by 10 publications

(8 citation statements)

References 35 publications

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“…Besides, examining raw area data (Fig. S3 ), we observe some periods of rapid expansion, which is coherent with the stratified diffusion process described by Leibhold et al 16 , in which the three stages of invasion (i.e., arrival, establishment, and expansion) are continuously repeating across spatial (from local to continental) scales. In any case, B. terrestris in the southern part of South America is still expanding its range, rapidly increasing across different habitats (i.e., sclerophyllous scrublands, dry forests, temperate rainforests, and the Patagonian steppe) in Argentina and Chile 23 , 25 , 26 .…”

Section: Resultssupporting

confidence: 86%

“…However, thinking on a more general level, a species undergoes three distinct stages during its invasive dynamics regardless of each species' specific traits or responses: an initial establishment phase, an expansion phase, and a saturation phase 15 . This pattern is often repeated over time at different spatial scales 16 , explaining lags and episodic expansions of most invasive species. These stages reflects different spatial expansion dynamics that can be represented with three simple theoretical scenarios (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Invasion dynamics of the European bumblebee Bombus terrestris in the southern part of South America

Fontúrbel

Murúa

Vieli

2021

Sci Rep

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Invasive species are one of the main biodiversity loss drivers. Some species can establish and thrive in novel habitats, impacting local communities, as is the case of managed pollinators. In this regard, an invasive species' expansion process over time is critical for its control and management. A good example is the European bumblebee Bombus terrestris, which has rapidly invaded the southern part of South America after being repeatedly introduced in Chile for crop pollination since 1997. We assessed the temporal dynamics of B. terrestris invasion in Argentina and Chile by compiling 562 occurrence points from 2000 to 2019. We used two estimators (minimum convex polygon and 95% fixed kernel) to estimate the increase of the invaded area over time. We found that the area invaded by B. terrestris in the southern part of South America presents a linear increase over time, which was consistent for both estimators. In this scenario, species traits, environmental characteristics, and introduction dynamics facilitate a rapid invasion process that will continue to expand, reaching other South American countries in the near future. As this bumblebee is a super-generalist, it probably will expand across South America, as climate niche modelling predicts, if no actions were taken.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Invasion dynamics of the European bumblebee Bombus terrestris in the southern part of South America

Fontúrbel

Murúa

Vieli

2021

Sci Rep

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“…Leaf mined samples tended to be quite rare in our field surveys and thus represented a relatively small sample size, sometimes being comprised of only a single leaf mine (Table 3). This is to be expected in early incursions undergoing range and host expansions (Liebhold et al 2020). Nonetheless, analysis of samples collected during our survey indicate expansions in the known geographic and host range of L. sativae .…”

Section: Discussionmentioning

confidence: 51%

A molecular method for biomonitoring of an exotic plant-pest: Leafmining for environmental DNA

Pirtle¹,

Rooyen

Maino³

et al. 2020

Preprint

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1. Understanding how invasive species respond to novel environments is limited by a lack of sensitivity and throughput in conventional biomonitoring methods. Arthropods in particular are often difficult to monitor due to small size, rapid lifecycles, and/or visual similarities with co-occurring species. This is true for the agromyzid leafminer, Liriomyza sativae, a global pest of vegetable and nursery industries that has recently established in Australia. 2. A highly robust method based on environmental DNA (eDNA) was developed exploiting traces of DNA left inside 'empty' leaf mines, which are easier to collect and persist longer in the environment than the insect. This extended the window of possible diagnosis to at least 28 days since a leaf mine became empty. The test allowed for visually indistinguishable leafmining damage caused by L. sativae to be genetically differentiated from that of other flies. 3. Field application resulted in the identification of new local plant hosts for L. sativae, including widely distributed weeds and common garden crops, with important implications for the pest's ability to spread. Moreover, the test allowed for the confirmation of L. sativae on an island with a previously unconfirmed population. 4. The developed eDNA method is likely to become an important tool for L. sativae and other leafmining species of biosecurity significance, which, historically, have been difficult to detect, diagnose and monitor. More generally, eDNA is emerging as a highly sensitive and labour-efficient surveillance tool for difficult to survey species to improve outcomes for agricultural industries, global health, and the environment.

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“…11 Liebhold (2020) Scale invariance in the spatial-dynamics of biological invasions. https://doi.org/10.3897/neobiota.62.53213…”

Section: Supplementary Materialsmentioning

confidence: 99%

Frameworks used in invasion science: progress and prospects

Wilson¹,

Bacher²,

Daehler³

et al. 2020

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Our understanding and management of biological invasions relies on our ability to classify and conceptualise the phenomenon. This need has stimulated the development of a plethora of frameworks, ranging in nature from conceptual to applied. However, most of these frameworks have not been widely tested and their general applicability is unknown. In order to critically evaluate frameworks in invasion science, we held a workshop on ‘Frameworks used in Invasion Science’ hosted by the DSI-NRF Centre of Excellence for Invasion Biology in Stellenbosch, South Africa, in November 2019, which led to this special issue. For the purpose of the workshop we defined a framework as “a way of organising things that can be easily communicated to allow for shared understanding or that can be implemented to allow for generalisations useful for research, policy or management”. Further, we developed the Stellenbosch Challenge for Invasion Science: “Can invasion science develop and improve frameworks that are useful for research, policy or management, and that are clear as to the contexts in which the frameworks do and do not apply?”. Particular considerations identified among meeting participants included the need to identify the limitations of a framework, specify how frameworks link to each other and broader issues, and to improve how frameworks can facilitate communication. We believe that the 24 papers in this special issue do much to meet this challenge. The papers apply existing frameworks to new data and contexts, review how the frameworks have been adopted and used, develop useable protocols and guidelines for applying frameworks to different contexts, refine the frameworks in light of experience, integrate frameworks for new purposes, identify gaps, and develop new frameworks to address issues that are currently not adequately dealt with. Frameworks in invasion science must continue to be developed, tested as broadly as possible, revised, and retired as contexts and needs change. However, frameworks dealing with pathways of introduction, progress along the introduction-naturalisation-invasion continuum, and the assessment of impacts are being increasingly formalised and set as standards. This, we argue, is an important step as invasion science starts to mature as a discipline.

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Scale invariance in the spatial-dynamics of biological invasions

Cited by 10 publications

References 35 publications

Invasion dynamics of the European bumblebee Bombus terrestris in the southern part of South America

Invasion dynamics of the European bumblebee Bombus terrestris in the southern part of South America

A molecular method for biomonitoring of an exotic plant-pest: Leafmining for environmental DNA

Frameworks used in invasion science: progress and prospects

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