Spreading and Distribution of Exotic Weed Ammannia coccinea in Korea

황선민,; 길지현,; 김영하,; 김성열,

doi:10.5660/wts.2014.3.4.292

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…It is known to be a noxious alein weed in a rice paddy field for competition with rice in Korea (Jung et al, 2017;Kim et al, 2018). Hwang et al (2014) investigated its distribution and habitat types in Korea to obtain primary data for the management system of this species.…”

Section: Introductionmentioning

confidence: 99%

Modelling rice competition with Leptochloa fusca, Bidens frondosa and Ammannia coccinea in transplanted rice cultivation

Umurzokov,

Bo,

Cho

et al. 2024

Weed Research

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A 2‐year field experiment was conducted in Daejeon, South Korea, to investigate changes in the growth parameters of rice plants during the growth and model the rice yield loss as affected by the competition with Leptochloa fusca, Bidens frondosa and Ammannia coccinea under transplanted rice cultivation. Compared with B. frondosa and A. coccinea, L. fusca significantly reduced the number of tillers at the early growth stage, resulting in more reduction in the number of panicles and other yield components such as the number of spikelets, ripened grain ratio and the ultimate rice yield at the later growth stage. Among the components, the panicle number was the most negatively and positively correlated with weed density and rice yield, respectively. Cousens' rectangular hyperbola model predicted that weed competitiveness value represented by parameter β was 0.0337 and 0.0572 for L. fusca, 0.0124 and 0.0165 for B. frondosa and 0.0059 to 0.0061 for A. coccinea in 20.8 and 15.2 hill m−2 rice densities, respectively, indicating the competition effect of L. fusca on rice yield was greater than that of B. frondosa and A. coccinea. Weed densities corresponding to a 50% reduction in the rice yield were 27 and 18 for L. fusca, 81 and 61 for B. frondosa and 169–164 for A. coccinea in 20.8 and 15.2 hill m−2 rice densities, respectively. Weeds are more competitive in low‐density rice plots, leading to greater yield loss. In addition, the economic thresholds (ET) are positively correlated with rice densities and negatively correlated with weed competitiveness. Although low‐density rice transplanting may offer economic benefits during cultivation, optimal rice density and weed control strategies are important for securing a high yield. Therefore, the model and findings could be applied to decision‐making systems in rice farming where weed interference is present.

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Section: Introductionmentioning

confidence: 99%

Modelling rice competition with Leptochloa fusca, Bidens frondosa and Ammannia coccinea in transplanted rice cultivation

Umurzokov,

Bo,

Cho

et al. 2024

Weed Research

View full text Add to dashboard Cite

show abstract

Estimating global geographical distribution and ecological niche dynamics of Ammannia coccinea under climate change based on Biomod2

Zhang,

Hu,

Wang

et al. 2024

Preprint

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Invasive alien plants are a major threat to biodiversity and the agricultural economy. The invasive weed (Ammannia coccinea) can compete with rice in paddy fields, posing a potential threat to rice production. Despite the crucial importance of estimating the global geographical distribution and ecological niche dynamics of A. coccinea in order to implement effective early warning and control strategies and to ensure global agro-rice security, there has been a dearth of relevant research. This study employed biomod2 ensemble model based on environmental and species data to analyze the distribution range shift and ecological niche dynamics of A. coccinea under the current and future climate scenarios. The results showed that the potential suitability area of A. coccinea was mainly located in Southern North America, northern and south-eastern South America, south-western Europe, the Middle East, central Africa, western Asia, south-eastern Asia, with a gradual increase in the mid-high suitability habitat areas with time and radiation levels. Under future climate change scenarios, the centroid of the suitable area of A. coccinea may shift northwards to higher latitudes. The ecological niche of A. coccinea has shifted less and the overall ecological niche has maintained stability under different climate scenarios in the future compared to the current period. Temperature, precipitation, and the human impact index were the primary factors influencing the future distribution of A. coccinea. In conclusion, climate change was contributing to the expansion of A. coccinea's high habitability area and shifts its ecological niche, necessitating the implementation of effective transnational management strategies to mitigate the impact of this invasive species on rice production.

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Spreading and Distribution of Exotic Weed Ammannia coccinea in Korea

Cited by 2 publications

References 4 publications

Modelling rice competition with Leptochloa fusca, Bidens frondosa and Ammannia coccinea in transplanted rice cultivation

Modelling rice competition with Leptochloa fusca, Bidens frondosa and Ammannia coccinea in transplanted rice cultivation

Estimating global geographical distribution and ecological niche dynamics of Ammannia coccinea under climate change based on Biomod2

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