Chemical control of overwintering green algae to mitigate green tide in the Yellow Sea

Gong, Ning; Shao, Kuishuang; Shen, Kun; Gu, Yanbin; Liu, Yu'an; Ye, Jinqing; Hu, Chuanming; Shen, Lingyu; Chen, Yanlong; Li, Dongwei; Fan, Jing-Li

doi:10.1016/j.marpolbul.2021.112424

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…The remaining algae join together to form huge floating masses which winds and currents push to the north towards the Shandong coast (Wang et al 2015 ). Inactivation of the overwintering banks of U. prolifera algae on the cultivation ropes by a short pulse of chlorine dioxide, an environment-friendly disinfectant, made the green algae gradually disappear within 2 weeks after the treatment (Gong et al 2021 ).…”

Section: Solutions To Clean Water Supplymentioning

confidence: 99%

China’s environmental solutions

Schmid

Xiong

2023

Appl Microbiol Biotechnol

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China emits unproportionately high concentrations of CO2 and, due to rapid population growth and industrialization, suffers from air, water, and soil pollution. However, many of these challenges for sustainable growth are being vigorously addressed, and China aims at a CO2 emission peak by 2030 and carbon neutrality by 2060 (“dual carbon policy”). In addition, nation-wide programs attempt to achieve reforestation and ecological restoration. By 2025, core elements of a “bioeconomy” and a circular economy are expected to be ready. Many of these programs extend into China’s international “belt-and-road” initiative (BRI). In this article, we briefly describe the present achievements of China’s environmental solutions and the country’s visions for a “digital, eco-friendly civilization.” Key points • China’s steps towards environmental cleaning, eco-protection, and decarbonization. • Steps towards a future bioeconomy.

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Section: Solutions To Clean Water Supplymentioning

confidence: 99%

China’s environmental solutions

Schmid

Xiong

2023

Appl Microbiol Biotechnol

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“…Compared to the muddy sediments, the sandy sediments were found to have a higher level of daily oxygen flux [55], which might have been more conducive to the occurrence of the saprophytic process. Second, the two investigated swimming beaches directly face the Yellow Sea, which is often threatened by the outbreak of Ulva bloom during summer in recent years [56], which enriches intertidal sediments with organic matter as nutritional substrates for saprophytic fungi.…”

Section: Potential Ecological Functions Of Intertidal Fungi Switch Wi...mentioning

confidence: 99%

Seasonal and Spatial Dynamics of Fungal Diversity and Communities in the Intertidal Zones of Qingdao, China

Li,

Pan

et al. 2023

JoF

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Intertidal zones comprise diverse habitats and directly suffer from the influences of human activities. Nevertheless, the seasonal fluctuations in fungal diversity and community structure in these areas are not well comprehended. To address this gap, samples of seawater and sediment were collected seasonally from the estuary and swimming beaches of Qingdao’s intertidal areas in China and were analyzed using a metabarcoding approach targeting ITS2 rDNA regions. Compared to the seawater community dominated by Ciliophora and Agaricomycetes, the sediment community was rather dominated by Dothideomycetes and Eurotiomycetes. Furthermore, the seawater community shifted with the seasons but not with the locations, while the sediment community shifted seasonally and spatially, with a specific trend showing that Cladosporium, Alternaria, and Aureobasidium occurred predominantly in the estuarine habitats during winter and in the beach habitats during spring. These spatiotemporal shifts in fungal communities’ composition were supported by the PERMANOVA test and could be explained partially by the environmental variables checked, including temperature, salinity, and total organic carbon. Unexpectedly, the lowest fungal richness was observed in the summer sediments from two swimming beaches which were attracting a high influx of tourists during summer, leading to a significant anthropogenic influence. Predicted trophic modes of fungal taxa exhibited a seasonal pattern with an abundance of saprotrophic fungi in the summer sediments, positively correlating to the temperature, while the taxa affiliated with symbiotroph and pathotroph-saprotroph occurred abundantly in the winter and spring sediments, respectively. Our results demonstrate the space–time shifts in terms of the fungal community, as well as the trophic modes in the intertidal region, providing in-depth insights into the potential influence of environmental factors and human activity on intertidal mycobiomes.

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“…The digitalized isohaline was compared with the simulated sea surface salinity. However, effective solutions for preventing the harmful algal bloom have not been found so far [17,18]. According to the local news, the worst Ulva prolifera green tides in last 15 years occurred in the summer of 2021.…”

Section: Observation Datamentioning

confidence: 99%

“…Later, Sun et al [14] confirmed that the DIN was the most critical nutrient controlling the magnitude and time of the green tide rather than phosphorus, based on a dynamic growth model. According to the observations, the DIN concentration in the southwestern Yellow Sea is lowest in the winter and reaches its highest value in April [7,11,15], which implies that overwintering banks of nutrients might be an important population trigger of Ulva prolifera [16,17]. However, effective solutions for preventing the harmful algal bloom have not been found so far [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…According to the observations, the DIN concentration in the southwestern Yellow Sea is lowest in the winter and reaches its highest value in April [7,11,15], which implies that overwintering banks of nutrients might be an important population trigger of Ulva prolifera [16,17]. However, effective solutions for preventing the harmful algal bloom have not been found so far [17,18]. According to the local news, the worst Ulva prolifera green tides in last 15 years occurred in the summer of 2021.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study on the Massive Outbreak of the Ulva prolifera Green Tides in the Southwestern Yellow Sea in 2021

Wang

2021

JMSE

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The most massive outbreak on record of the Ulva prolifera green tides in the southwestern Yellow Sea occurred in summer of 2021. The environmental factors were investigated based on observations and simulations. The results suggested that the significantly enhanced discharge of the Changjiang River since winter 2020–2021 was crucial for the outbreak of the Ulva prolifera green tides in the southwestern Yellow Sea, which could significantly have contributed to the nutrient enrichment off the Subei coast. Additionally, the southerly wind stress anomaly during winter 2020–2021 favored the upwind transport of Changjiang water. Numerical experiments showed that the remaining winter freshwater coming from the Changjiang River, which persisted in the Subei coast’s upper layer until spring 2021, exceeded the long-term average value by 20%. We demonstrated that these large amount of nutrient inputs, as an effective supplement, were the reason the green tides sharply emerged as an extensive outbreak in 2021. The easterly wind anomaly during spring 2021 contributed to the landing of Ulva prolifera off the Lunan coast.

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Chemical control of overwintering green algae to mitigate green tide in the Yellow Sea

Cited by 7 publications

References 18 publications

China’s environmental solutions

China’s environmental solutions

Seasonal and Spatial Dynamics of Fungal Diversity and Communities in the Intertidal Zones of Qingdao, China

Numerical Study on the Massive Outbreak of the Ulva prolifera Green Tides in the Southwestern Yellow Sea in 2021

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