Invasive species and climate change: Conyza canadensis (L.) Cronquist as a tool for assessing the invasibility of natural plant communities along an aridity gradient

Har-Edom, Or-Leyl; Sternberg, Marcelo

doi:10.1007/s10530-009-9640-z

Cited by 11 publications

(10 citation statements)

References 28 publications

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“…For the Sea of Galilee, the most important water resource in the region, the changes in temperature and wind which effect evaporation along with the changes in rainfall threaten to change the biological makeup of this natural reservoir [ Rimmer et al , 2011; Hambright et al , 1994]. In addition, some natural plant communities may become vulnerable to invasive species because of reduced rainfall [ Har‐Edom and Sternberg , 2010].…”

Section: Resultsmentioning

confidence: 99%

Extreme value indicators in highly resolved climate change simulations for the Jordan River area

et al. 2011

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.[1] Understanding changing trends and frequency of extreme rainfall and temperature events is extremely important for optimal planning in many sectors, including agriculture, water resource management, health, and even economics. For people living in the Jordan River region of the Middle East such changes can have immediate devastating impacts as water resources are already scarce and overexploited and summer temperatures in the desert regions can reach 45°C or higher. Understanding shifts in frequency and intensity of extreme events can provide crucial information for planning and adaptation. In this paper we present results from regional climate model simulations with RegCM3 and MM5 centered on the eastern Mediterranean region. Our analysis focuses on changes in extreme temperature and rainfall events. We show that maximum daily summer temperature is expected to increase by between 2.5°C and 3°C, with an increase in warm spell length. Precipitation extremes are expected to increase with longer dry spells, shorter wet spells, and increases in heavy rainfall. Model agreement for the control period 1961-1990 is higher in the southern region than in the north, perhaps because of the complex topography, suggesting that even small differences in spatial scale play an important role. In addition, we notice that the chosen global model plays an important role in determining future temperature trends, while the choice of regional climate model is critical for understanding how precipitation is expected to evolve.

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Section: Resultsmentioning

confidence: 99%

Extreme value indicators in highly resolved climate change simulations for the Jordan River area

et al. 2011

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“…This can particularly be expected for annual invasive species, which may have an ability to exploit resources earlier, more rapidly or to a greater extent than native perennials (Leffler et al 2011). Consistent with the fluctuating resource theory, a number of studies on invasive annual plants have shown that natural or experimental increase in rainfall facilitated invasion, while drought decreased the success of alien species (Hobbs and Mooney 1991;Dukes and Mooney 1999;Suttle et al 2007;Har-Edom and Sternberg 2010;Suazo et al 2012). Alternatively, alien species with rapid resource acquisition may be favored when drought causes plant mortality in the resident native vegetation, or limits the growth or reproduction of the resident species, which cannot immediately recover when drought stress is alleviated (Jiménez et al 2011;Diez et al 2012;Manea et al 2016).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 87%

Experimental drought indirectly enhances the individual performance and the abundance of an invasive annual weed

et al. 2020

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During environmental change, invasive species may be favored by increased resource input or reduced resource use of the resident community. Plasticity in certain plant traits of invasive species may be one possible mechanism behind their ability to quickly exploit unused resources. We tested whether rainfall manipulations (severe drought, moderate drought, watering) alter the growth and reproductive success of the invasive annual Conyza canadensis, and if it translates into a change in the abundance of the species in a semiarid perennial grassland in Central Hungary. Overall, C. canadensis exhibited greater individual performance and higher abundance in drought plots than in control and watered plots. At individual level, plants showed the strongest response to moderate drought: they grew 2.5-times taller than in control and watered plots, and produced twice and 2.5-times more seeds than in watered and control plots, respectively. Reproductive phenology was advanced in response to rain exclusions. Although severe drought caused 40% mortality, the cumulative performance of C. canadensis, expressed as plot-level aboveground biomass, was consistently greater in severe drought plots than in control and watered plots throughout the 3 years of the study. The higher performance of C. canadensis in drought plots is most likely due to the decreased abundance and, thus, decreased competitive effect of previously dominant perennial grasses caused by the rain exclusions. We conclude that drier summers that suppress perennial grasses will favor this alien annual forb, and phenotypic plasticity in growth and reproduction may contribute to its invasion success.

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“…The vigorous vegetative growth of A. ochroleuca in wadi channels and abandoned fields compared to the drier habitats, such as sandy plains and mountain ranges, could result from enhanced soil water availability and nutrients. In arid and semi-arid regions, soil water availability, especially water pulses in streams, largely determines the growth and productivity of plant communities [ 55 , 56 ], particularly those of invasive herbaceous species [ 57 ]. Plant populations in habitats with low soil moisture availability and nutrients often have low growth rates and small leaves [ 58 ].…”

Section: Discussionmentioning

confidence: 99%

Functional Traits Plasticity of the Invasive Herb Argemone ochroleuca Sweet in Different Arid Habitats

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Al‐Rowaily

El‐Bana

et al. 2020

Plants

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Understanding the strategies and mechanisms of invasive species could guide their control and management especially in arid ecosystems. This study compares the vegetative and reproductive functional traits of the invasive Mexican poppy (Argemone ochroleuca), in seven habitat types, in southwestern Saudi Arabia. The results showed that the aboveground phenological attributes such as plant height, leaf area, and leaf dry mass attained the highest values in the wadi channels, whereas these attributes attained the lowest values in the mountain ranges. Maximum specific leaf area, root parameters, and all reproductive traits were recorded in the abandoned fields. In contrast to all other habitats, populations from abandoned fields had a greater investment of resources in belowground structures, while the population growing in the wadi channels and mountain ranges habitat allocated more energy to vegetative parts. The plasticity in vegetative and reproductive resource allocation in A. ochroleuca is an important mechanism in determining its colonizing ability in different habitat types and expanding the distribution range. The present data of the functional traits of A. ochroleuca agree with the resource fluctuation hypothesis, where the plant flourished in the abandoned fields that attained the highest values of organic matter and nutrients. Therefore, the restoration of these disturbed habitats could improve the resistance toward invasion by this noxious weed.

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Invasive species and climate change: Conyza canadensis (L.) Cronquist as a tool for assessing the invasibility of natural plant communities along an aridity gradient

Cited by 11 publications

References 28 publications

Extreme value indicators in highly resolved climate change simulations for the Jordan River area

Extreme value indicators in highly resolved climate change simulations for the Jordan River area

Experimental drought indirectly enhances the individual performance and the abundance of an invasive annual weed

Functional Traits Plasticity of the Invasive Herb Argemone ochroleuca Sweet in Different Arid Habitats

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