Shift in algal blooms from micro‐ to macroalgae around China with increasing eutrophication and climate change

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Nov. 8, 2023

Abstract Blooms of microalgal red tides and macroalgae (e.g., green golden caused by Ulva Sargassum ) have widespread problems around China in recent years, but there is uncertainty what triggers these blooms how they interact. Here, we use 30 years monitoring data to help answer questions, focusing on the four main species microalgae Prorocentrum donghaiense , Karenia mikimotoi Noctiluca scintillans Skeletonema costatum associated with region. The frequency increased from 1991 2003 then decreased until 2020, S. exhibiting highest rate decrease. Green started occur 1999 has since been increase. Golden were first reported 2012. macroalgal a negative linear relationship coverage China, positive correlation total nitrogen phosphorus loads as well atmospheric CO 2 sea surface temperature (SST). Increased outbreaks are very likely due worsening levels eutrophication, combined rising SST, which contribute reduced tides. increasing grazing microzooplankton also results decline areas affected This study shows clear shift algal over past driven combination climate change, stress, indicating fundamental change coastal systems

Language: Английский

---

Structure-activity relationships of bioactive polysaccharides extracted from macroalgae towards biomedical application: A review

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 324, P. 121533 - 121533

Published: Oct. 26, 2023

Language: Английский

---

Legacy Effects of Late Macroalgal Blooms on Dissolved Inorganic Carbon Pool through Alkalinity Enhancement in Coastal Ocean

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(5), P. 2186 - 2196

Published: Jan. 24, 2023

Taking the world's largest green tide caused by macroalga Ulva prolifera in South Yellow Sea as a natural case, it is studied here if macroalgae can perform inorganic carbon sequestration ocean. Massive released large amounts of organic carbon, most which were transformed microorganisms into dissolved (DIC). Nearshore field investigations showed that, along with seawater deoxygenation and acidification, both DIC total alkalinity (TAlk) increased significantly (both >50%) areas covered dense U. at late-bloom stage. Offshore mapping cruises revealed that TAlk relatively higher stage than before-bloom Laboratory cultivation further manifested significant enhancement effect on seawater. Sulfate reduction and/or denitrification likely dominated production TAlk. Notably, half generated almost all could persist under varying conditions, from hypoxia to normoxia air–water CO2 disequilibrium re-equilibrium. The allowed more remain rather escape atmosphere, thus having long-term legacy increasing pool

Language: Английский

---

Remote Data for Mapping and Monitoring Coastal Phenomena and Parameters: A Systematic Review

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(3), P. 446 - 446

Published: Jan. 23, 2024

Since 1971, remote sensing techniques have been used to map and monitor phenomena parameters of the coastal zone. However, updated reviews only considered one phenomenon, parameter, data source, platform, or geographic region. No review has offered an overview that can be accurately mapped monitored with data. This systematic was performed achieve this purpose. A total 15,141 papers published from January 2021 June 2023 were identified. The 1475 most cited screened, 502 eligible included. Web Science Scopus databases searched using all possible combinations between two groups keywords: geographical names in areas platforms. demonstrated that, date, many (103) (39) (e.g., coastline land use cover changes, climate change, urban sprawl). Moreover, authors validated 91% retrieved parameters, 39 1158 times (88% combined together other parameters), 75% over time, 69% several compared results each available products. They obtained 48% different methods, their 17% GIS model techniques. In conclusion, addressed requirements needed more effectively analyze employing integrated approaches: they data, merged

Language: Английский

---

Exploration and implication of green macroalgal proliferation in the Nanhui-east-tidal-flat: an investigation of post-reclamation mudflat wetlands

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: Jan. 27, 2025

The Nanhui-east-tidal-flat (NETF), the largest marginal shoal in Yangtze River of China, is significantly impacted by human activities. Prior research has not detected presence green macroalgae NETF, nor it explored effects reclamation on distribution macroalgae. However, 2021, a small-scale aggregated attached algal mats emerged potentially signaling onset tide and necessitating vigilant monitoring. Morphological molecular biological identification analysis revealed that all collected were attributed to single dominant species, Ulva prolifera , characterized broad blades prominent air bladders, colonizing various substrates. U. exhibited continuous growth from March May peaking at wet weight 373.6229 g/m² dry 72.7904 1, within accessible sampling period. rapid proliferation “opportunistic” was facilitated high-level eutrophication favorable environmental conditions. Furthermore, six potential germplasm sources are summarized. dominance intertidal zone often indicates high deteriorating ecological With long-term repeated restoration projects, vegetation subjected vicious cycle destruction. Therefore, important recognize (macroalgae micropropagules) will persist over long term, mudflats with monotonous eutrophic habitats highly likely experience future large-scale blooms. Notably, floating observed sea area near NETF July 2023, such concerns unfounded. This study conducts foundational scientific algae, type relatively scarce other marine areas. Most studies tend initiate only after outbreak tides, lacking early background data environment, thus rendering this significant reference value. Concurrently, emphasizes field surveys remain an essential approach for conducting algae region, need select appropriate methods based occurrence development mats, as required situation. Importantly, reflects stability ecosystems prerequisite modern ocean management services, provides new perspectives highlights risk factors should be considered implementation construction projects.

Language: Английский

---

Evolutionary trends and analysis of the driving factors of Ulva prolifera green tides: A study based on the random forest algorithm and multisource remote sensing images

Marine Environmental Research, Journal Year: 2024, Volume and Issue: 198, P. 106495 - 106495

Published: April 15, 2024

Language: Английский

---

Identification and spatio-temporal analysis of Ulva prolifera in a typical coastal area using SAR imageries

Ecological Informatics, Journal Year: 2025, Volume and Issue: unknown, P. 103039 - 103039

Published: Jan. 1, 2025

Language: Английский

---

Strong interannual variation of green tides in the southern Yellow Sea: Crucial factors and implications on management strategies

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 216, P. 117989 - 117989

Published: April 21, 2025

Language: Английский

---

Strong Interannual Variation of Green Tides in the Southern Yellow Sea: Crucial Factors and Management Strategies

Published: Jan. 1, 2025

Language: Английский

---

Dissipation of Ulva prolifera green tides across various spatial and temporal scales and the short-term effects on marine environments

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 207, P. 107082 - 107082

Published: March 10, 2025

Language: Английский

---