Rapid evolution of an invasive weed

Turner, Kathryn G.; Hufbauer, Ruth A.; Rieseberg, Loren H.

doi:10.1111/nph.12634

Cited by 79 publications

(94 citation statements)

References 57 publications

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“…Herbaceous TPIs may have the ability to expand in some VU and RI ecoregions of risk hotspots with low nutrition resources such as northern Europe and central Australia ( Fig. 1; Eskelinen and Harrison 2014;Kremer 2014;Turner et al 2014). Therefore, we should guard against the entry of TPIs into these VU and RI ecoregions to maximize their capacity to prevent and control plant invasion (Foxcroft et al 2011;O'Donnell et al 2012;Duursma et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Risk hotspots for terrestrial plant invaders under climate change at the global scale

Wan

Wang

2016

Environ Earth Sci

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Terrestrial plant invaders (TPIs) have a large potential to threaten plant diversity under climate change.To prevent the spread of TPIs under climate change, we must identify the risk hotspots for TPIs. However, the risk hotspots for TPIs have not yet been explicitly addressed at the global scale under climate change. Here, we selected 336 TPIs from the Invasive Species Specialist Group list and used species distribution modelling and Hot Spot Analysis to map the risk hotspots of TPIs based on the terrestrial ecoregions in the current, low and high gas concentration scenarios. The risk hotspots of TPIs were mainly distributed in South America, Europe, Australia, New Zealand and northern and southern Africa. Climate change may decrease the areas of hotspots that allow for TPI expansion, but the potential distribution probabilities of TPIs may increase in the high concentration scenario. Furthermore, TPIs, particularly herbaceous and woody ones, might still expand into critical or endangered ecoregions of these risk hotspots in the current, low and high concentration scenarios. We also need to focus on the impact of TPI expansion on both vulnerable and relatively stable ecoregions due to the increasing potential distribution probabilities of TPIs in risk hotspots and should integrate climate change into the risk assessment of plant invasion in the vulnerable and relatively stable ecoregions.

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Section: Discussionmentioning

confidence: 99%

Risk hotspots for terrestrial plant invaders under climate change at the global scale

Wan

Wang

2016

Environ Earth Sci

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“…2013; Turner et al. 2014), but these attempts are complicated by the variability of favored strategies between different habitats (Lachmuth et al. 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Phenotypic differentiation was demonstrated in two previous glasshouse common garden experiments, which compared phenotypes of 57 populations of native and invasive C. diffusa under benign and stressful conditions, including drought, flood, nutrient deficiency, and herbivory (Turner et al. 2014). Increased fitness in invasive populations as a result of phenotypic differentiation would represent a possible causal driver of invasion.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, our experimental design allowed us to examine performance under more realistic field conditions (as compared to the previous glasshouse study from Turner et al. 2014), while minimizing potential “home range” biases.…”

Section: Introductionmentioning

confidence: 99%

“…Further, we test whether patterns of genetically based phenotypic variation are in agreement with a resource allocation trade-offs (Hypothesis 1b) by comparing plant traits from both ranges in the presence or absence of experimentally applied water addition and limitation, a trade-off implicated in a previous study (Turner et al. 2014). We test whether invasive populations of C. diffusa perform better than native populations in a field setting in the naturalized range and whether performance is correlated with phenotype under water limitation.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive plasticity and niche expansion in an invasive thistle

Turner

Fréville

Rieseberg

2015

Ecology and Evolution

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Phenotypic differentiation in size and fecundity between native and invasive populations of a species has been suggested as a causal driver of invasion in plants. Local adaptation to novel environmental conditions through a micro-evolutionary response to natural selection may lead to phenotypic differentiation and fitness advantages in the invaded range. Local adaptation may occur along a stress tolerance trade-off, favoring individuals that, in benign conditions, shift resource allocation from stress tolerance to increased vigor and fecundity and, therefore, invasiveness. Alternately, the typically disturbed invaded range may select for a plastic, generalist strategy, making phenotypic plasticity the main driver of invasion success. To distinguish between these hypotheses, we performed a field common garden and tested for genetically based phenotypic differentiation, resource allocation shifts in response to water limitation, and local adaptation to the environmental gradient which describes the source locations for native and invasive populations of diffuse knapweed (Centaurea diffusa). Plants were grown in an experimental field in France (naturalized range) under water addition and limitation conditions. After accounting for phenotypic variation arising from environmental differences among collection locations, we found evidence of genetic variation between the invasive and native populations for most morphological and life-history traits under study. Invasive C. diffusa populations produced larger, later maturing, and therefore potentially fitter individuals than native populations. Evidence for local adaptation along a resource allocation trade-off for water limitation tolerance is equivocal. However, native populations do show evidence of local adaptation to an environmental gradient, a relationship which is typically not observed in the invaded range. Broader analysis of the climatic niche inhabited by the species in both ranges suggests that the physiological tolerances of C. diffusa may have expanded in the invaded range. This observation could be due to selection for plastic, “general-purpose” genotypes with broad environmental tolerances.

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The Distribution of Genetic Variance Across Phenotypic Space and the Response to Selection

Blows

McGuigan

2016

Invasion Genetics

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Rapid evolution of an invasive weed

Cited by 79 publications

References 57 publications

Risk hotspots for terrestrial plant invaders under climate change at the global scale

Risk hotspots for terrestrial plant invaders under climate change at the global scale

Adaptive plasticity and niche expansion in an invasive thistle

The Distribution of Genetic Variance Across Phenotypic Space and the Response to Selection

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