Climate change and international trade can exacerbate the invasion risk of the red imported fire ant Solenopsis invicta around the globe

Li, Dexian; Li, Zixin; Wang, Xiaoxia; Wang, Li; Khoso, Abdul Ghaffar; Liu, Deguang

doi:10.1127/entomologia/2023/1686

Cited by 3 publications

(2 citation statements)

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“…The red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), native to the Paraná River basin, South America, is globally recognised as one of the 100 most dangerous invasive species [1][2][3]. In recent years, with climate change and global economic development [4], its distribution has expanded to include tropical and subtropical areas of the Americas, India, Africa, Pacific islands, and so on, and it has invaded more than 10 provinces and cities in China [5]. These ants are extremely aggressive and territorial; for example, they attack other vertebrate or invertebrate animals to negatively affect the ecological balance [4,6], eat the seeds and roots of crops [7], and destroy power and communication facilities [8].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, with climate change and global economic development [4], its distribution has expanded to include tropical and subtropical areas of the Americas, India, Africa, Pacific islands, and so on, and it has invaded more than 10 provinces and cities in China [5]. These ants are extremely aggressive and territorial; for example, they attack other vertebrate or invertebrate animals to negatively affect the ecological balance [4,6], eat the seeds and roots of crops [7], and destroy power and communication facilities [8]. Moreover, when humans or livestock are attacked by S. invicta, they experience red and swollen skin accompanied by burning, and allergic individuals may develop symptoms such as pus-filled blisters, itching, anaphylactic shock, and even death [2,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Analyses of Reproductive Caste Types Reveal Vitellogenin Genes Involved in Queen Fertility in Solenopsis invicta

Liu,

Xu,

Zhang

et al. 2023

IJMS

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The red imported fire ant (Solenopsis invicta Buren) is a social pest species with a robust reproductive ability that causes extensive damage. Identification of the genes involved in queen fertility is critical in order to better understand the reproductive biology and screening for the potential molecular targets in S. invicta. Here, we used the mRNA deep sequencing (RNA-seq) approach to identify differentially expressed genes (DEGs) in the transcriptomes of three reproductive caste types of S. invicta, including queen (QA) and winged female (FA) and male (MA) ants. The genes that were specific to and highly expressed in the queens were then screened, and the Vg2 and Vg3 genes were chosen as targets to explore their functions in oogenesis and fertility. A minimum of 6.08 giga bases (Gb) of clean reads was obtained from all samples, with a mapping rate > 89.78%. There were 7524, 7133, and 977 DEGs identified in the MA vs. QA, MA vs. FA, and FA vs. QA comparisons, respectively. qRT–PCR was used to validate 10 randomly selected DEGs, including vitellogenin 2 (Vg2) and 3 (Vg3), and their expression patterns were mostly consistent with the RNA-seq data. The S. invicta Vgs included conserved domains and motifs that are commonly found in most insect Vgs. SiVg2 and SiVg3 were highly expressed in queens and winged females and were most highly expressed in the thorax, followed by the fat body, head, and epidermis. Evaluation based on a loss-of-function-based knockdown analysis showed that the downregulation of either or both of these genes resulted in smaller ovaries, less oogenesis, and less egg production. The results of transcriptional sequencing provide a foundation for clarifying the regulators of queen fertility in S. invicta. The functions of SiVg2 and SiVg3 as regulators of oogenesis highlight their importance in queen fecundity and their potential as targets of reproductive disruption in S. invicta control.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Analyses of Reproductive Caste Types Reveal Vitellogenin Genes Involved in Queen Fertility in Solenopsis invicta

Liu,

Xu,

Zhang

et al. 2023

IJMS

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Total Length–Weight Relationships and Condition Factor of Invasive Procambarus clarkii (Girard, 1852) in Caohai Lake, China

Zhang,

Xiong,

Wang

et al. 2024

Journal of Applied Ichthyology

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Caohai Lake, hailed as a gem on the Yunnan–Guizhou Plateau, is currently being faced with serious biological invasion threats. Among the most influential invasive species, the Procambarus clarkii (Girard, 1852) is causing various adverse effects on the lake’s ecosystem. However, there has been little attention paid to this issue for a long time. In light of this, this study conducted a sample collection in August 2022 to investigate the total length–weight relationships (LWRs) and condition factors (K) of the target species with the aim of providing fundamental data for the upcoming ecological restoration in Caohai Lake. The results are as follows: (1) P. clarkii was distributed throughout the lake, with females exhibiting larger body sizes than males; (2) the LWRs were expressed as: W♂ = 2 × 10−6 TL3.66 (R2 = 0.90 and n = 227); W♀ = 4 × 10−6 TL3.39 (R2 = 0.95 and n = 259), both showing positive allometric growth pattern and indicating, the weight gain rate of males is significantly faster than that of females during the growth period; (3) the K was 0.27 ± 0.04%, indicating robustness in P. clarkii in the lake. These findings underscore that urgent scientific measures should be taken to handle the rapid invasion of P. clarkii in Caohai Lake.

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Toxic effects of cadmium on the growth and predation capacity of the predator Orius sauteri

Kou,

Zhu,

Wang

et al. 2024

CABI Agric Biosci

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The heavy metal cadmium (Cd) leads to significant bottom-up effects on food chains of plants, herbivores, and predators in agroecosystems. Through the transfer and accumulation of Cd. In addition to the indirect effects of this cascading effects, predators Orius sauteri fed with artificial diets containing Cd also have a direct effect. We found that O. sauteri fed with sucrose solutions containing Cd at high concentrations of 125 mg/L and 625 mg/L significantly decreased the survival of the 3rd and 5th instar, female, and male adults (except 125 mg/L) of O. sauteri. However, the survival of O. sauteri nymphs was significantly increased when they fed with low concentrations of 1 mg/L, 5 mg/L and 25 mg/L Cd sucrose solutions. Cd stress has differing effects on the LC50 of each age of O. sauteri, the lowest LC50 for male adults (153 mg/L), followed by 3rd instar nymphs (192 mg/L), 5th instar nymphs (289 mg/L) and female adults (383 mg/L). It is interesting that 1 mg/L, 5 mg/L, and 25 mg/L of sucrose solutions containing Cd significantly improved the predation capacity of the nymphs of O. sauteri to the Bemisia tabaci pupa. The predation ability of the male adults of O. sauteri on B. tabaci pupa were significantly improved, but significantly decreased in the female adults when they fed with 125 mg/L and 625 mg/L sucrose solutions containing Cd. This difference needs to be studied in depth in the future, controlling Cd contamination and protecting natural enemies to enhance the biological control of pests. Graphical Abstract

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Climate change and international trade can exacerbate the invasion risk of the red imported fire ant Solenopsis invicta around the globe

Cited by 3 publications

References 0 publications

Comparative Analyses of Reproductive Caste Types Reveal Vitellogenin Genes Involved in Queen Fertility in Solenopsis invicta

Comparative Analyses of Reproductive Caste Types Reveal Vitellogenin Genes Involved in Queen Fertility in Solenopsis invicta

Total Length–Weight Relationships and Condition Factor of Invasive Procambarus clarkii (Girard, 1852) in Caohai Lake, China

Toxic effects of cadmium on the growth and predation capacity of the predator Orius sauteri

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