Formation mechanism and environmental drivers of Alexandrium catenella bloom events in the coastal waters of Qinhuangdao, China

Wu, Haiyan; Dong, Chenfan; Zheng, Guanchao; Zhang, Zhihua; Zhang, Ya-Ya; Tan, Zhijun; Gu, Haifeng

doi:10.1016/j.envpol.2022.120241

Cited by 10 publications

(3 citation statements)

References 41 publications

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“…The PSTs were analyzed according to published methods [80,81], with minor adjustments. In brief, 5 ± 0.05 g of homogenized shellfish samples were extracted with 5 mL of an aqueous 1% acetic acid solution and vortexed for 90 s. The above-formed liquid was collected, boiled at 100 • C for 5 min, cooled in cold water until it reached room temperature, and centrifuged for 10 min at 4500 rpm.…”

Section: Psts Extractionmentioning

confidence: 99%

“…The A and B mobile phases consisted of water and 95% acetonitrile in water, respectively, both containing 2 mM ammonium formate and 50 mM formic acid. The elution gradient was as follows: 80% B, held for 3 min; linear gradient to 40% B for 5 min and held for 2 min; and then back to 80% B within 1 min and held for 2 min [80,81]. The LC-MS/MS conditions are listed in Table S2, and the other parameters are provided in Table S3.…”

Section: Lc-ms/ms Analysismentioning

confidence: 99%

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Contamination Status and Risk Assessment of Paralytic Shellfish Toxins in Shellfish along the Coastal Areas of China

Zheng,

Xu,

et al. 2024

Marine Drugs

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Paralytic shellfish toxins (PSTs) are widely distributed in shellfish along the coast of China, causing a serious threat to consumer health; however, there is still a lack of large-scale systematic investigations and risk assessments. Herein, 641 shellfish samples were collected from March to November 2020, and the PSTs’ toxicity was detected via liquid chromatography–tandem mass spectrometry. Furthermore, the contamination status and potential dietary risks of PSTs were discussed. PSTs were detected in 241 shellfish samples with a detection rate of 37.60%. The average PST toxicities in mussels and ark shells were considerably higher than those in other shellfish. The PSTs mainly included N-sulfonylcarbamoyl toxins (class C) and carbamoyl toxins (class GTX), and the highest PST toxicity was 546.09 μg STX eq. kg−1. The PST toxicity in spring was significantly higher than those in summer and autumn (p < 0.05). Hebei Province had the highest average PST toxicity in spring. An acute exposure assessment showed that consumers in Hebei Province had a higher dietary risk, with mussels posing a significantly higher dietary risk to consumers. This research provides reference for the green and sustainable development of the shellfish industry and the establishment of a shellfish toxin prevention and control system.

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Section: Psts Extractionmentioning

confidence: 99%

Section: Lc-ms/ms Analysismentioning

confidence: 99%

Contamination Status and Risk Assessment of Paralytic Shellfish Toxins in Shellfish along the Coastal Areas of China

Zheng,

Xu,

et al. 2024

Marine Drugs

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“…Previous studies are primarily devoted to identifying the causative species of HABs (Kong et al 2012 or the biogeochemical processes underlying hypoxia (Zhao et al 2017, Song et al 2020, Zhang et al 2022a. While there have been a few attempts to elucidate the high ecological risks in QCW (Cao et al 2018, Wu et al 2022, the majority rely on qualitative speculations and can hardly provide a comprehensive explanation to the abnormally high ecological risks in this region. In other words, previous studies struggle to explain why QCW is so unique to be favored by the ecological disasters year after year.…”

Section: Introductionmentioning

confidence: 99%

Weak local upwelling may elevate the risks of harmful algal blooms and hypoxia in shallow waters during the warm season

Wu,

Zhai,

et al. 2023

Environ. Res. Lett.

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Harmful Algal Blooms (HABs) and hypoxia, as common ecological disasters, are typically site-specific and recurrent, causing enduring environmental problems for coastal communities. Although these issues are often attributed to coastal eutrophication, in certain low-nutrient areas, such ecological disasters still frequently occur while the underlying cause is poorly understood. A prime example is the Qinhuangdao coastal waters in North China. This study intends to investigate the controlling factors of such incongruous ecological issues recurring in those low-nutrient areas with a case study of Qinhuangdao, utilizing numerical models and satellite observations. The result indicates that the weak tide-induced upwelling during summer creates favorable conditions (warm water with high transparency) for the occurrence of HABs and hypoxia in this region. It is due to that Qinhuangdao is precisely situated at the current amphidromic point of semi-diurnal tides, characterized by weak tide mixing. Likewise, the same story happens on the northern shelf of the Shandong Peninsula, where ecological problems are also prominent in China. The present study implies that shallow waters with weak local upwelling are susceptible to ecological issues during the warm season. This finding challenges the traditional view that strong-upwelling zones are more vulnerable to ecological disasters due to ample nutrient supply within the euphotic layer. It implies that tidal dynamics can greatly affect the vulnerability of coastal waters to ecological issues, which can be of significance to coastal management. Furthermore, the finding may have broader global applicability, given the ubiquity of tide-induced upwelling in various other coastal regions.

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Toxicity variability in Alexandrium pacificum isolated from East China Sea: impact of temperature and light intensity

Zhu,

Yin,

Pang

et al. 2024

J. Ocean. Limnol.

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Formation mechanism and environmental drivers of Alexandrium catenella bloom events in the coastal waters of Qinhuangdao, China

Cited by 10 publications

References 41 publications

Contamination Status and Risk Assessment of Paralytic Shellfish Toxins in Shellfish along the Coastal Areas of China

Contamination Status and Risk Assessment of Paralytic Shellfish Toxins in Shellfish along the Coastal Areas of China

Weak local upwelling may elevate the risks of harmful algal blooms and hypoxia in shallow waters during the warm season

Toxicity variability in Alexandrium pacificum isolated from East China Sea: impact of temperature and light intensity

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