The impact of altered precipitation variability on annual weed species

Robinson, Todd M. P.; Gross, Katherine L.

doi:10.3732/ajb.1000125

Cited by 34 publications

(29 citation statements)

References 30 publications

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“…In the context of global climate change, the precipitation pattern may be variable and result in more water supply heterogeneity, which is a considerable challenge faced by terrestrial ecosystems [10, 11, 12]. Longer periods between rainfall events and a tendency for lower precipitation during summer are expected in some regions [13, 14], such as northern China.…”

Section: Introductionmentioning

confidence: 99%

Dominance of an alien shrub Rhus typhina over a native shrub Vitex negundo var. heterophylla under variable water supply patterns

Tan

et al. 2017

PLoS ONE

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Temporal heterogeneity of a resource supply can have a profound effect on the interactions between alien and native plant species and their potential invasiveness. Precipitation patterns may be variable and result in a higher heterogeneity of water supply with global climate change. In this study, an alien shrub species, Rhus typhina, introduced to China from North America and a native shrub species, Vitex negundo var. heterophylla, were grown in monoculture and mixed culture under different water supply regimes, with four levels of water supply frequencies but with a constant level of total supplied water. After 60 days of treatments, the alien species was found to be the superior competitor in the mixed culture and was unaffected by changes in the water supply pattern. The dominance of R. typhina was mainly owing to its greater biomass and effective modulation of leaf physiology. However, in the mixed culture, V. negundo var. heterophylla exhibited both leaf- and whole-plant-level acclimations, including higher leaf length to petiole length and root to shoot biomass ratios, and lower specific leaf weight and leaf length to leaf width ratio. Plant height of V. negundo var. heterophylla was comparable to that of R. typhina in the mixed culture, which is a strategy to escape shading. Although water treatments had little effect on most traits in both species, the possible influence of water regimes should not be neglected. Compared with high-frequency water supply treatments, more individuals of V. negundo var. heterophylla died in low-water-frequency treatments when in competition with R. typhina, which may lead to species turnover in the field. The authors recommended that caution should be exercised when introducing R. typhina to non-native areas in the context of global climate change.

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Section: Introductionmentioning

confidence: 99%

Dominance of an alien shrub Rhus typhina over a native shrub Vitex negundo var. heterophylla under variable water supply patterns

Tan

et al. 2017

PLoS ONE

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“…Climate change involves rising temperatures Gillett et al 2011) and altered precipitation patterns, which also increase the probability for summer droughts in Europe (Bloomfield et al 2006;Lobell and Burke 2008;Robinson and Gross 2010). Weeds are influenced by these altered abiotic conditions (Dukes et al 2009;Singer et al 2013).…”

Section: Direct Effects Of Climate Change On Weedsmentioning

confidence: 99%

Impact of climate change on weeds in agriculture: a review

Peters

Breitsameter

Gerowitt

2014

Agron. Sustain. Dev.

217

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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“…Robinson and Gross studied how increased variability in precipitation would impact two common annual weeds in the USA, Chenopodium album and Setaria faberi Herrm. (giant foxtail) [126]. As might be expected, the impact of periodic droughts varied, depending on plant life stage, but overall, Chenopodium album showed greater resilience under prolonged dry periods than Setaria faberi.…”

Section: Responses To Increased Climate Variabilitymentioning

confidence: 77%

“…As might be expected, the impact of periodic droughts varied, depending on plant life stage, but overall, Chenopodium album showed greater resilience under prolonged dry periods than Setaria faberi. The authors concluded that predicted changes in the occurrence and severity of precipitation events are likely to alter relative abundances of agriculturally important weeds [126].…”

Section: Responses To Increased Climate Variabilitymentioning

confidence: 99%

“…This knowledge may provide some clues as to the ability of annual weeds to thrive in currently more mesic environments but predicted to experience more variable rainfall as the climate changes [126]. Robinson and Gross studied how increased variability in precipitation would impact two common annual weeds in the USA, Chenopodium album and Setaria faberi Herrm.…”

Section: Responses To Increased Climate Variabilitymentioning

confidence: 99%

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