Unprecedent green macroalgae bloom: mechanism and implication to disaster prediction and prevention

International Journal of Digital Earth, Journal Year: 2023, Volume and Issue: 16(1), P. 3772 - 3793

Published: Sept. 18, 2023

Green macroalgae bloom (GMB), with the dominant species of Ulva prolifera, has regularly occurred since 2007 along China coast. Although disaster prevention and control achieved favorable results in 2020, satellite-observed GMB annual maximum coverage (AMC) rebounded sharply 2021 to an unprecedented level. The reasons for this rebound significant interannual variability over past 15 years are still open questions. Here, by using long-term time-series (2007–2022) optical Synthetic Aperture Radar satellite observations (1000+ scenes), meteorological data water quality statistics, mechanism analysis was performed exploring effects from natural factors human activities. Two key determinants AMC successfully identified numerous potential which distribution a area (the Subei Shoal) during critical period (from April May 20) nutrient availability. Furthermore, these two parameters, novel model prediction (R2 = 0.87, p < 0.01) is proposed independently validated, can reasonably explain (2014–2021) agree well latest observation 2022 (percentage difference 12%). Finally, suggestions future alleviation. This work may aid management measure optimization.

Language: Английский

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Rectifying misinformation on the climate intervention potential of ocean afforestation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 9, 2024

Language: Английский

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Distribution and Identification of Ulva aragoensis (Ulvaceae, Chlorophyta), a Constituent Species of Green Tides in the Southern Yellow Sea, Based on Molecular Data

Journal of Marine Science and Engineering, Journal Year: 2022, Volume and Issue: 10(11), P. 1767 - 1767

Published: Nov. 17, 2022

Green tides are a serious global ecological disaster; the largest occur in Southern Yellow Sea (SYS). Early-stage green SYS composed of four species (Ulva prolifera, Ulva flexuosa, linza, and compressa). We found that U. aragoensis is constituent based on molecular data. Furthermore, this study re-evaluated proportion it was more prevalent micro-propagules cultured from surface seawater during an early-stage tide 2021. The internal transcribed spacers, tufA, 18S, rbcL, large subunit, psbA, rps2-trnL gene sequences were compared; tufA rbcL most suitable DNA barcodes for distinguishing aragoensis. A haplotype analysis floating its performed to correlation between macroalgae micro-propagules; close similarities occurred them. This further clarified composition provided reference assessing relationship macroalgae.

Language: Английский

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Genome-wide SNP markers provided insights into the reproductive strategy and genetic diversity of the green tide causative species Ulva prolifera in China

Journal of Oceanology and Limnology, Journal Year: 2024, Volume and Issue: 42(2), P. 533 - 543

Published: Jan. 11, 2024

Language: Английский

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Contribution of the decomposition of a macroalgal bloom to methane production in sea cucumber culture

Aquaculture Reports, Journal Year: 2023, Volume and Issue: 30, P. 101558 - 101558

Published: March 29, 2023

CH4 is one of the most important greenhouse gases responsible for climate change. The effect algal decomposition on emission fluxes in aquaculture environments unknown. This study determined relative abundance methanogens northern China. We various parameters water and sediment after Chaetomorpha valida. results showed that increased significantly during C. average flux was 50.64 mg m-2 h-1 when density valida 25 cm-3, which 11 times higher than at a 0 cm-3. concentrations dissolved oxygen (DO), nitrite, nitrate sulfate pond decreased formation strong anaerobic reduction environment promoted release CH4. Our confirmed enhanced flux. ranged from 4.62 to h-1. It particularly remove decomposed algae timely manner control gas emissions ponds mitigate

Language: Английский

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Competition relations between selected microalgae and bloom-forming Ulva prolifera

Journal of the Marine Biological Association of the United Kingdom, Journal Year: 2023, Volume and Issue: 103

Published: Jan. 1, 2023

Abstract Large-scale Ulva prolifera green tides have successively occurred for 16 years (2007–2022) in the Yellow Sea (YS), and different life stages of U. play critical roles regulating occurrence development tides. U . microalgae a similar niche seawater, but their potential interactions are not yet clearly understood. In this study, we investigated competition relationship between two at five controlled laboratory experiments. The results showed that one Alexandrium tamarense , can only inhibit gametes first settlement stage. Inversely, germinated begin to show negative effects on multiple ways subsequent four stages, growth inhibition rates among these ranged from 19 100%. complex may influence formation Meanwhile, ecological consequences phytoplankton, even decreased microalgal blooms YS need be further evaluated.

Language: Английский

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Growth and photosynthetic changes of Ulva prolifera in response to diurnal temperature variations

Aquaculture International, Journal Year: 2023, Volume and Issue: 32(3), P. 3233 - 3247

Published: Nov. 2, 2023

Language: Английский

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Predicting massive floating macroalgal blooms in a regional sea

Environmental Modelling & Software, Journal Year: 2024, Volume and Issue: unknown, P. 106310 - 106310

Published: Dec. 1, 2024

Language: Английский

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Differential effects of petroleum hydrocarbons on the growing development and physiological characteristics of Ulva species

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(40), P. 53291 - 53303

Published: Aug. 26, 2024

Language: Английский

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