Ageratina Adenophora (Asteraceae) New Species to the Italian Alien Flora and Observations on Its Environmental Threats

Guacchio, Emanuele Del

doi:10.2478/hacq-2013-0008

Cited by 6 publications

(10 citation statements)

References 13 publications

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“…The spread of the invasive plant A. adenophora is considered to be a severe problem in more than 30 countries in Asia, Africa, Oceania, Europe and North America (Del Guacchio, 2013;Heystek, Wood, Neser, & Kistensamy, 2011;Muniappan, Raman, & Reddy, 2009;Parsons & Cuthbertson, 2001;Qiang, 1998;Yu et al, 2016). Native to Mexico, this apomictic (Bala & Gupta, 2014;Hao et al, 2010), triploid Asteraceae (Baker, 1965;Bala & Gupta, 2014) grows gregariously as a subshrub in moist tropical and subtropical mountainous regions across the globe (Stone, Smith, & Tunison, 1992;Wan et al, 2010;Wang & Wang, 2006;Yu et al, 2016).…”

Section: About the Speciesmentioning

confidence: 99%

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Datta

Schweiger

Kühn

2019

Journal of Biogeography

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Aim Ecological inferences drawn from studies on niche dynamics of invasive species are often limited due to difficulties in disentangling evolutionary adaptations of the fundamental niche from demographic and interspecific processes shaping the realized niche. We used Ageratina adenophora, an invasive plant with restricted evolutionary potential to investigate shifts in the realized climatic niche independent of potential evolutionary adaptations. Location Native Mexican range; exotic ranges in Asia, the USA, the Canary Islands and Australia. Taxon Invasive Asteraceae A. adenophora (Spreng.) R.M.King & H.Rob. Commonly known as Crofton weed. Methods We compiled a robust occurrence dataset of A. adenophora for its native Mexican range and four exotic ranges (Asia, USA, Canary Islands, and Australia) and quantified pairwise niche overlap (Schoener's D) and niche dynamic (stable, unfilling and expansion) indices between the native and exotic ranges in reduced climatic space using smoothed occurrence densities. Niche shift was statistically tested using niche equivalency tests. Results The value of niche overlap (Schoener's D) differed considerably, ranging from relatively high between Mexico and Asia to low between Mexico and Australia. The niche dynamic indices indicated highest level of niche stability in Asia while highest degree of unstable niche was detected in Australia due to both niche expansion and unfilling. The niche similarity tests indicated that the native niche is more similar to the exotic niche than any randomly sampled niche from the exotic range. However, the niche equivalency tests showed evidence of niche differentiation as the observed niche overlap was lower than expected by chance for all pairwise comparisons. Jointly these tests indicate that despite the similarity, the native niche is not perfectly identical to any of the exotic niches. Main conclusions The current study has direct implications for understanding range expansion of invasive species even in the absence of evolutionary adaptation. Our study indicates that invasive species can occupy different, non‐consistent realized climatic niches in different parts of the world, thus limiting the transferability of species distribution models and corresponding risk assessments or future projections.

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Section: About the Speciesmentioning

confidence: 99%

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Datta

Schweiger

Kühn

2019

Journal of Biogeography

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“…A . adenophora is native to Mexico (Qiang, 1998 ) and was introduced as an ornamental plant to other regions, including the United Kingdom (Auld & Martin, 1975 ), Hawaii (Muniappan et al., 2009 ), Australia (Auld, 1969 ), India (Bhatt et al., 2012 ; Poudel et al, 2019 ), South Africa (Kluge, 1991 ), Nepal (Tiwari, 2005 ), and Italy (Del Guacchio, 2013 ). A .…”

Section: Introductionmentioning

confidence: 99%

Predicting the potential global distribution of Ageratina adenophora under current and future climate change scenarios

Yanli²,

Liu

et al. 2021

Ecology and Evolution

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Aim Invasive alien species (IAS) threaten ecosystems and humans worldwide, and future climate change may accelerate the expansion of IAS. Predicting the suitable areas of IAS can prevent their further expansion. Ageratina adenophora is an invasive weed over 30 countries in tropical and subtropical regions. However, the potential suitable areas of A. adenophora remain unclear along with its response to climate change. This study explored and mapped the current and future potential suitable areas of Ageratina adenophora. Location Global. Taxa Asteraceae A. adenophora (Spreng.) R.M.King & H.Rob. Commonly known as Crofton weed. Methods Based on A. adenophora occurrence data and climate data, we predicted its suitable areas of this weed under current and future (four RCPs in 2050 and 2070) by MaxEnt model. We used ArcGIS 10.4 to explore the potential suitable area distribution characteristics of this weed and the “ecospat” package in R to analyze its altitudinal distribution changes. Results The area under the curve (AUC) value (>0.9) and true skill statistics (TSS) value (>0.8) indicated excelled model performance. Among environment factors, mean temperature of coldest quarter contributed most to the model. Globally, the suitable areas for A. adenophora invasion decreased under climate change scenarios, although regional increases were observed, including in six biodiversity hotspot regions. The potential suitable areas of A. adenophora under climate change would expand in regions with higher elevation (3,000–3,500 m). Main conclusions Mean temperature of coldest quarter was the most important variable influencing the potential suitable area of A. Adenophora. Under the background of a warming climate, the potential suitable area of A. adenophora will shrink globally but increase in six biodiversity hotspot regions. The potential suitable area of A. adenophora would expand at higher elevation (3,000–3,500 m) under climate change. Mountain ecosystems are of special concern as they are rich in biodiversity and sensitive to climate change, and increasing human activities provide more opportunities for IAS invasion.

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“…It has commonly been believed that the weed spread naturally to China during the 1940s from Myanmar along the international highway (Wang & Wang, ; Dong et al ., ). It was first recorded from New Zealand in 1931 (Webb, ), Nepal in 1952 (Tiwari et al ., ), South Africa in 1958 (Henderson, ) and recently Italy in 2013 (Del Guacchio, ). Currently, it has naturalised in 40 countries from tropical to temperate regions of the world (Fig.…”

Section: Geographic Distribution Habitat and Dispersal Pathwaymentioning

confidence: 99%

“…After more than 100 years of introduction outside its native range, the invasive nature of A. adenophora was first reported in Australia during the 1940s, in Hawaii during the 1950s and in California (USA) during the 1960s (Auld, ). Currently, it is considered one of the worst invasive weeds in Asia, Africa and Oceania (Muniappan et al ., ), while the invasiveness and its impact appear relatively low in Europe (Del Guacchio, ).…”

Section: Geographic Distribution Habitat and Dispersal Pathwaymentioning

confidence: 99%

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Biology and management of the invasive weed Ageratina adenophora (Asteraceae): current state of knowledge and future research needs

et al. 2019

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Summary Biological invasion is increasing worldwide and the management of invasive species is becoming an important priority for vegetation managers. Success of invasive species management depends on a thorough understanding of the biology of the organism in question and the effectiveness of current management efforts, in order to identify the best practices for management improvement. In this review, we synthesised current biological knowledge of a noxious invasive weed Ageratina adenophora to identify knowledge gaps and assessed management efforts to identify best practices. Finally, we proposed some priority areas for future research to fill knowledge gaps and improve management. Our analysis showed that A. adenophora has already invaded 40 countries, mainly in Asia, Oceania, Africa and Europe. Phenotypic plasticity, allelopathic interference and invasion‐mediated changes in the soil microbial community are the proposed mechanisms that facilitate rapid spread of this weed. However, allelopathy as a mechanism of invasion success of this weed has not been supported by ecologically meaningful experiments. Though mechanical, chemical and biological control measures have been used, their success remains limited and the weed continues to spread in new regions. Among seven biological control agents examined to date, gall fly (Procecidochares utilis) and leaf spot fungus (Passalora ageratinae) have been effective in limited areas to suppress growth of this weed. Some perennial native grasses (e.g. Setaria sphacellata and Lolium perenne) have shown potential to competitively suppress A. adenophora. In conclusion, understanding the invasion mechanisms, exploring further to identify effective biological control agents, combined with approaches of ecological restoration, could help in the management of this weed.

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Ageratina Adenophora (Asteraceae) New Species to the Italian Alien Flora and Observations on Its Environmental Threats

Cited by 6 publications

References 13 publications

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Niche expansion of the invasive plant species Ageratina adenophora despite evolutionary constraints

Predicting the potential global distribution of Ageratina adenophora under current and future climate change scenarios

Biology and management of the invasive weed Ageratina adenophora (Asteraceae): current state of knowledge and future research needs

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