The global problem of nuisance macroalgal blooms and pathways to its use in the circular economy

Joniver, Catherine F.H.; Photiades, Angelos; Moore, Pippa J.; Winters, Ana L.; Woolmer, Andrew; Adams, Jessica

doi:10.1016/j.algal.2021.102407

Cited by 42 publications

(31 citation statements)

References 104 publications

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“…prolifera, as it considers environmental impacts in a holistic manner. A systematic literature review shows that most LCA studies on macroalgae focused on biorefinery processes and biofuel production based on cultivated macroalgae, and LCA studies on multiproduct utilization technology and case studies on macroalgae are very urgent, which can not only provide ideas to effectively respond to macroalgal blooms but also promote the research progress of their circular economy. , To the best of our knowledge, most of the current research on U. prolifera focuses on ocean transportation, , growth conditions, and biofuels, and there are no studies that specifically explore the environmental impacts of different disposal options for U.…”

Section: Introductionmentioning

confidence: 99%

Environmental and Economic Impacts of Different Disposal Options for Ulva prolifera Green Tide in the Yellow Sea, China

Chen

Liu

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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The Ulva prolifera (U. prolifera) green tide has had a large-scale eruption in the Yellow Sea of China for 15 consecutive years. A large amount of coastal U. prolifera has been salvaged and brought ashore for further disposal, but little is known about the environmental impact of its disposal. Using Qingdao as a representative, this study quantifies the life cycle environmental impact and cost of disposal options to deal with the outbreak of the Yellow Sea U. prolifera in China, including incineration, fast decomposition, stabilization, and recycling. In addition, we also analyzed two potential disposal options (anaerobic digestion to produce biogas and fermentative distillation to produce ethanol). In 2021, Qingdao spent 350 million CNY and consumed 46.7 kt oil-Eq of fossil fuels and emitted 331.0 kt CO2-Eq of greenhouse gases in response to the eruption of the U. prolifera green tide. Scenario analysis shows that comprehensive utilization is a crucial step to maximize the environmental and economic benefits of U. prolifera disposal, including recycling for fertilizer production and anaerobic digestion for power generation. The combination of source control and comprehensive utilization will minimize the impact of the Yellow Sea U. prolifera green tide.

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Section: Introductionmentioning

confidence: 99%

Environmental and Economic Impacts of Different Disposal Options for Ulva prolifera Green Tide in the Yellow Sea, China

Chen

Liu

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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“…A few Ulva species cause massive kilometer-scale blooms termed as green tides, and these have been recorded mainly around the industrialized coastlines of Europe, North America, and east Asia [2]. The world's most extensive Ulva green tides have repeatedly occurred in the Yellow Sea since 2007 [3] or 2008 [4].…”

Section: Introductionmentioning

confidence: 99%

“…Data from the type locality population[40];2 The two types reported by[18];3 Thirty-one types reported by[42] and several more[19,43,47].…”

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confidence: 99%

Massive Ulva Green Tides Caused by Inhibition of Biomass Allocation to Sporulation

Hiraoka

2021

Plants

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The green seaweed Ulva spp. constitute major primary producers in marine coastal ecosystems. Some Ulva populations have declined in response to ocean warming, whereas others cause massive blooms as a floating form of large thalli mostly composed of uniform somatic cells even under high temperature conditions—a phenomenon called “green tide”. Such differences in population responses can be attributed to the fate of cells between alternative courses, somatic cell division (vegetative growth), and sporic cell division (spore production). In the present review, I attempt to link natural population dynamics to the findings of physiological in vitro research. Consequently, it is elucidated that the inhibition of biomass allocation to sporulation is an important key property for Ulva to cause a huge green tide.

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“…Macroalgae (Chlorophyta, green algae; Phaeophyta, brown algae; and Rhodophyta, red algae) have important roles in marine ecosystems as food and habitat for animals. However, excess macroalgal abundance can have negative impacts on the environment by decreasing species richness and abundance, especially of seagrasses and fish [1,2,3]. Rapid industrialization and environmental protection actions in coastal zones cause eutrophication, which promotes macroalgal growth and reproduction [1].…”

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confidence: 99%

“…Rapid industrialization and environmental protection actions in coastal zones cause eutrophication, which promotes macroalgal growth and reproduction [1]. For example, increased nitric oxide production due to altered marine nutrient levels provides conditions for sporulation of the green alga Ulva , which is the most reported and spatially distributed blooming algae, and causes the largest green tide blooms in the Yellow Sea [1,2]. Ulva spores attach to substrates (such as laver culture rafts and parent Ulva thalli), which then develop into new thalli and produce more spores.…”

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confidence: 99%

The ever-lasting green tides: what can we do?

Ren¹,

Qin

2022

Preprint

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Macroalgal blooms (Green tides) are occurring more frequently in many regions of the world because of the combined effects of increasingly intense human activity and climate change. In the last decade, the world’s largest Ulva prolifera green tide has become a recurrent phenomenon, appearing every summer in the southern Yellow Sea, China, and it is getting worse. Green tides can hurt coastal tourism and eradicate aquaculture and artisanal fishing. Eutrophication in nearshore waters is the ultimate explanation for the explosive growth of the macroalgal biomass, but the specific course of each nearshore green tides is often complex and requires in-depth and extensive research to develop effective mitigation strategies. It is becoming increasingly urgent to prevent and control the bloom at the early stage, promote the ecological virtuous cycle, and efficiently salvage and use these valuable raw materials.

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The global problem of nuisance macroalgal blooms and pathways to its use in the circular economy

Cited by 42 publications

References 104 publications

Environmental and Economic Impacts of Different Disposal Options for Ulva prolifera Green Tide in the Yellow Sea, China

Environmental and Economic Impacts of Different Disposal Options for Ulva prolifera Green Tide in the Yellow Sea, China

Massive Ulva Green Tides Caused by Inhibition of Biomass Allocation to Sporulation

The ever-lasting green tides: what can we do?

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