The invading weeds within the Western Mediterranean Basin

Guillerm, J. L.; Floc’h, E. Le; Maillet, J.; Boulet, C.

doi:10.1007/978-94-009-1876-4_5

Cited by 36 publications

(39 citation statements)

References 15 publications

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“…Consequently, divergence in introduced regions would reflect prior divergence of source populations in the native range. Historical records of S. inaequidens range expansion make this explanation unlikely, particularly in regards to the transects explored in this study, where the species migration progression has been well documented by botanists (e.g., Ernst 1998;Guillerm et al 1990;Jovet and Vilmorin 1975;Lebeau et al 1978). In both regions, the species was first restricted to local sites of introduction (vicinity of wool factories) and started to spread to new localities in the 1970s.…”

Section: Non-adaptive Mechanisms Leading To Clinal Variationmentioning

confidence: 86%

“…It reached Gent, Namur and Charleroi (Belgium) in the 1970s (Lebeau et al 1978) and Amsterdam (The Netherlands) in 1985 (Ernst 1998). In southern France, the species was initially collected in 1936 in the wool-processing center of Mazamet (Guillerm et al 1990;Senay 1944). It was only after 1950 that the species began its expansion.…”

Section: Study Species and Invasion Historymentioning

confidence: 99%

“…By the 1970s, the species was considered an agricultural weed in southwestern France, well within the first introduction region (Jovet and Vilmorin 1975). In the early 1980s, the species reached the Mediterranean coast from Mazamet (Guillerm et al 1990). A decade later, even though the species was mainly distributed along roads and railways, it was considered a threat to natural habitats (Michez 1995).…”

Section: Study Species and Invasion Historymentioning

confidence: 99%

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Clinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe

Monty

Mahy

2008

Oecologia

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Abstract:The dynamics of plant population differentiation may be integral in predicting aspects of introduced species invasion. In the present study, we tested the hypothesis that European populations of Senecio inaequidens (Asteraceae), an invasive species with South African origins, differentiated during migration from two independent introduction sites into divergent altitudinal and climatic zones. We carried out 2 years of common garden experiments with eight populations sampled from Belgian and ten populations from French altitudinal transects. The Belgian transect followed a temperature and precipitation gradient. A temperature and summer drought gradient characterized the French transect. We evaluated differentiation and clinal variation in plants germinated from field-collected seed using the following traits: days to germination, days to flowering, height at maturity, final plant height and aboveground bio-mass. Results showed that S. inaequidens populations differentiated in growth traits during invasion. During the 1st year of sampling, the results indicated clinal variation for growth traits along both the Belgium and French altitudinal transects. Data from the 2nd year of study demonstrated that with increasing altitude, a reduction in three growth traits, including plant height at maturity, final plant height and aboveground biomass, was detected along the French transect, but no longer along the Belgian one. Phenological traits did not exhibit a clear clinal variation along altitudinal transects. The possible evolutionary causes for the observed differentiation are discussed.

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Section: Non-adaptive Mechanisms Leading To Clinal Variationmentioning

confidence: 86%

Section: Study Species and Invasion Historymentioning

confidence: 99%

Section: Study Species and Invasion Historymentioning

confidence: 99%

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Clinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe

Monty

Mahy

2008

Oecologia

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“…Weed communities with a history of frequent herbicide treatments often lack keystone species, which lead to less stable arable communities that are often prone to the establishment of arable newcomers and invasive species (Fox and Fox 1986). Invaders often exert symptoms of becoming new keystone species themselves (Guillerm et al 1990;Clements and Ditommaso 2011).…”

Section: Niche Shiftsmentioning

confidence: 99%

“…areas, including exotic and potentially invasive species such as Panicum dichotomiflorum and Datura stramonium (Guillerm et al 1990;Breitsameter et al 2014). Some late emergers such as Chenopodium spp.…”

mentioning

confidence: 99%

Impact of climate change on weeds in agriculture: a review

Peters

Breitsameter

Gerowitt

2014

Agron. Sustain. Dev.

208

116

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Over the past decades, climate change has induced transformations in the weed flora of arable ecosystems in Europe. For instance, thermophile weeds, late-emerging weeds, and some opportunistic weeds have become more abundant in some cropping systems. The composition of arable weed species is indeed ruled by environmental conditions such as temperature and precipitation. Climate change also influences weeds indirectly by enforcing adaptations of agronomic practice. We therefore need more accurate estimations of the damage potential of arable weeds to develop effective weed control strategies while maintaining crop yield. Here we review the mechanisms of responses of arable weeds to the direct and indirect effects of climate change. Climate change effects are categorized into three distinct types of shifts occurring at different scales: (1) range shifts at the landscape scale, (2) niche shifts at the community scale, and (3) trait shifts of individual species at the population scale. Our main conclusions are changes in the species composition and new species introductions are favored, which facilitate major ecological and agronomical implications. Current research mainly considers processes at the landscape scale. Processes at the population and community scales have prevalent importance to devise sustainable management strategies. Trait-climate and niche-climate relationships warrant closer consideration when modeling the possible future distribution and damage potential of weeds with climate change.

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CHARACTERIZATION OF INVASIVE CONYZA SPECIES (ASTERACEAE) IN EUROPE: QUANTITATIVE TRAIT AND ISOZYME ANALYSIS

Thébaud

Abbott

1995

American J of Botany

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The genus Conyza (A'steraceae) represents one of the foremost examples of intercontinental plant invasions from the New World to the Old World that has resulted in a number of taxonomic problems owing to the dearth of knowledge concerning the biosystematics of the genus. In this study, quantitative trait and enzyme electrophoresis analysis was used to assess the pattern ofvariation within and among five short-lived taxa ofConyza (c. blakei, C. bonariensis, C. canade'tiSrs, Ci floribunda, C. sumatrensis), introduced into Europe, and to test the hypothesis of a recent hybrid origin of C. floribunda. The five taxa exhibit marked differences in morphological and life-history characteristics that are concordant with divergence in genes encoding isozymes. In addition, a recent hybrid origin of C. floribunda is clearly not supported by either quantitative or electrophoretic data. These findings suggest that the five taxa differentiated genetically in their native range prior to their introduction in Europe. As formerly suggested by Arthur Cronquist (Bulletin of the Torrey Botanical Club 70: 629-{j32, 1943), C. canadensis appears to be more closely related to the genus Erigeron than the other taxa. The electrophoretic results also confirm that this particular species is diploid, while the presence ofmultiple bands and fixed heterozygosity demonstrates that the other Conyza taxa are all genetic allopolyploids. Both quantitative and electrophoretic data suggest the presence of two groups among the polyploid taxa: one comprising C. bonariensis and C. sumatrensis, the other C. blakei and C.floribunda. The latter grouping is supported by the observation that C. blakei and C. floribunda, both native to Argentina, exhibit a striking ability to shift from semel parous to iteroparous reproduction, while the other taxa are strictly semelparous.

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The invading weeds within the Western Mediterranean Basin

Cited by 36 publications

References 15 publications

Clinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe

Clinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe

Impact of climate change on weeds in agriculture: a review

CHARACTERIZATION OF INVASIVE CONYZA SPECIES (ASTERACEAE) IN EUROPE: QUANTITATIVE TRAIT AND ISOZYME ANALYSIS

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