Article
Food Science & Technology
Caiyun Zhang
Summary: This study analyzed the temporal and spatial variability of harmful algal blooms (HABs) in coastal waters of Fujian. It found that the number and impact area of HABs varied significantly over different decades, with the highest occurrence in the 2000s. The proportion of HABs caused by dinoflagellates decreased, while the proportion caused by diatoms increased. In the 2010s, toxic HAB events caused by Karenia mikimotoi increased in frequency and spatial coverage along the central Fujian coast.
Article
Marine & Freshwater Biology
Eugin Bornman, Paul D. Cowley, Janine B. Adams, Nadine A. Strydom
Summary: The study investigated the estuarine movement patterns of Mugil cephalus in response to Harmful algal blooms in a eutrophied estuary in South Africa. The results showed that the fish mainly occupied the upper mesohaline to lower oligohaline zones and avoided the bloom maxima areas. This is the first study to document small-scale intra-estuary movements of a mugilid worldwide and to suggest avoidance behavior of estuarine fishes in response to HABs.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Environmental Sciences
Dmitry S. Dukhovskoy, Eric P. Chassignet, Alexandra Bozec, Steven L. Morey
Summary: This study uses a high-resolution regional forecast system to evaluate the predictability of the Loop Current (LC) system and assess the value of different observations. The experiments show that surface and subsurface observations have a significant impact on medium-range forecasts, while their impact on short-term forecasts is less prominent. By improving the accuracy of initialization, substantial improvements in forecasts up to 3 months can be achieved.
FRONTIERS IN MARINE SCIENCE
(2023)
Review
Biology
Syed Shabi Ul Hassan Kazmi, Neelamanie Yapa, Samantha C. Karunarathna, Nakarin Suwannarach
Summary: Harmful algal blooms pose a serious threat to aquatic environments and their expansion is a warning sign of environmental deterioration. Increased intensity of these blooms leads to increased toxin production and impacts on ecological quality. This review provides an overview of the causes, impacts, toxicity, grazing defense, management, and control measures of harmful algal blooms, highlighting the need for advanced scientific research to mitigate this increasing threat.
Review
Microbiology
Wenduo Cheng, Somin Hwang, Qisen Guo, Leyuan Qian, Weile Liu, Yang Yu, Li Liu, Yi Tao, Huansheng Cao
Summary: Cyanobacterial harmful algal blooms (CyanoHABs) are a global aquatic hazard whose mechanism is not fully understood. The dominance of CyanoHABs represents a deviation from their low abundance under conventional evolution. To understand the mechanism of CyanoHABs, the origin and adaptive radiation of cyanobacteria in oligotrophic Earth are revisited. It is found that CyanoHABs result from the interaction between cyanobacterial ecophysiology and elevated nutrients. Additionally, cyanobacteria have a lower per capita nutrient demand for growth compared to coexisting eukaryotic algae. The comprehensive mechanism of CyanoHABs comprises a general mechanism and a special mechanism, and predicts the coexistence or replacement of CyanoHABs by eukaryotic algal blooms under eutrophication.
Article
Engineering, Environmental
Han Gao, Ze Zhao, Lu Zhang, Feng Ju
Summary: Cyanobacterial harmful algal blooms (CyanoHABs) are intensifying globally and are affected by climate change and eutrophication. This study investigates the role of cyanopeptides, bioactive secondary metabolites of cyanobacteria, in microbiota assembly and ecosystem function. The study finds that cyanopeptides, particularly those beyond microcystins, negatively impact microbiota diversity and exert potential collective eco-toxicities. In addition, cyanopeptides have a stronger influence on microbial communities than nutrients during CyanoHABs. Cyanopeptide restriction and degradation are identified as the deterministic drivers of community assembly.
Review
Medicine, General & Internal
Chris C. Lim, Jeonggyo Yoon, Kelly Reynolds, Lynn B. Gerald, Andrew P. Ault, Seulkee Kleo, Michelle L. Bell
Summary: Harmful algal blooms (HABs) are increasing globally, and the relationship between HAB aerosols and human health remains unclear. This review synthesizes current knowledge and identifies gaps in understanding this relationship. Some HAB aerosols have been linked to respiratory outcomes, but direct measurements of aerosol or toxin concentrations are lacking, and epidemiological studies are limited. Further research is needed to explore the health effects of other HAB species, dose-response relationships, effects of concurrent exposures, the impact of long-term exposures, and disparities in vulnerable populations.
Article
Marine & Freshwater Biology
Grant C. Pitcher, Deon C. Louw
Summary: The Benguela Upwelling System (BUS) is often subject to high incidence of Harmful Algal Blooms (HABs), including Paralytic and Diarrhetic Shellfish Poisoning (PSP and DSP) caused by organisms like Alexandrium catenella. Other HAB organisms present in the system pose risks to human health and marine life, leading to large mortalities and ecosystem disruptions.
Article
Environmental Sciences
Mohamad Abbas, Sara Dia, Eliza. S. S. Deutsch, Ibrahim Alameddine
Summary: This study assessed eutrophication and harmful algal bloom dynamics in the Qaraoun Reservoir. It found high levels of eutrophication and algal concentrations, with toxin levels exceeding safety guidelines 45% of the time. Monitoring indicated that changes in the dissolved oxygen levels, ammonium, ortho-phosphate, and pH can effectively predict the reservoir's trophic state and algae blooms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Shengjun Xu, Ping Lyu, Xiaoxu Zheng, Haijun Yang, Bing Xia, Hui Li, Hao Zhang, Shuanglong Ma
Summary: Harmful algal blooms are a global issue with significant negative impacts on aquatic environments and human health. However, the current monitoring and control methods have limitations, which restrict their practical application. Therefore, there is a need to improve existing approaches for monitoring and controlling harmful algal blooms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jun Sha, Haiyan Xiong, Chengjun Li, Zhiying Lu, Jichao Zhang, Huan Zhong, Wei Zhang, Bing Yan
Summary: The study analyzed 5720 published literatures on HABs studies in the past 30 years, presenting emerging trends, environmental and human health risks, prevention and control strategies, and future developments. The review provides a global perspective on HABs and emphasizes the need for immediate responses.
Article
Geosciences, Multidisciplinary
Kelly Luis, Philipp Koehler, Christian Frankenberg, Michelle Gierach
Summary: This study explores the use of TROPOMI's red SIF for detecting Karenia brevis, comparing it with the standard remote sensing HAB indicator MODIS-Aqua. The results show that red SIF provides more spatiotemporal fluorescence information than nFLH and can be used for detection under cloudy conditions, which improves early warning systems for harmful algal blooms.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Donald Scavia, Yu-Chen Wang, Daniel R. Obenour
Summary: Ecological models are important for predicting ecosystem responses to stresses, and their reliability depends on long records, skill assessments, and quantifying uncertainty. This study focuses on Lake Erie harmful algal blooms and enhances a Bayesian model using new information and a larger dataset. The model explains a significant portion of the variability in bloom size and performs better than previous forecasts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biology
J. C. Macdonald, H. Gulbudak
Summary: Nutrient-Phytoplankton-Zooplankton-Detritus (NPZD) models are used to predict the interactions and dynamics of phytoplankton, zooplankton, and their ecosystem. Incorporating the harmful effects of phytoplankton overpopulation on zooplankton, this study introduces a new NPZD model for harmful algal bloom (HAB) modeling. It also examines the stability and bifurcation of the NPZ system, and explores the ecological implications of seasonality and disturbances. The study emphasizes the vulnerability of ecosystems with high phytoplankton favorability and the sensitivity of healthy ecosystems to nutrient depletion.
JOURNAL OF MATHEMATICAL BIOLOGY
(2023)
Article
Microbiology
Spiridon E. Papoulis, Steven W. Wilhelm, David Talmy, Erik R. Zinser
Summary: The presence of an abundance of restriction modification systems is a key factor in the ecological success of harmful algal blooms caused by cyanobacteria, particularly in nutrient-rich environments. These defense mechanisms play a crucial role in the competitive advantage of these organisms, especially in the face of viral predation.
Article
Geosciences, Multidisciplinary
S. G. Marinone, M. J. Ulloa, A. Pares-Sierra, M. F. Lavin, R. Cudney-Bueno
JOURNAL OF MARINE SYSTEMS
(2008)
Article
Energy & Fuels
Miqueas Diaz-Maya, Marco Ulloa, Rodolfo Silva
Summary: This study analyzed the wave power in the Gulf of Mexico by examining its spatial distribution and seasonal variability. Through simulation data and validation experiments, it was found that the wave power in this region is moderate, and the best devices for wave energy conversion were identified.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Marco Ulloa, Rodolfo Silva, Ismael Marino-Tapia
Summary: Analysis of storm wave measurements provides valuable parameters for understanding local conditions and wave energy converters. Partitioning the energy spectrum helps identify low directional spread wave groups. This paper analyzes the Hurricane Wilma energy spectrum using single-point measurements in shallow water. The study finds modulational instability can produce nonlinear wave groups in addition to linear superposition.
Article
Multidisciplinary Sciences
Marco Julio Ulloa, Manuel Antonio Arenas-Mendez
SN APPLIED SCIENCES
(2019)
Article
Education, Scientific Disciplines
Marco J. Ulloa
EUROPEAN JOURNAL OF PHYSICS
(2007)
Article
Environmental Sciences
Edmund B. Mabhuye
Summary: Climate change poses a critical challenge to human well-being, particularly in terms of vulnerability and livelihood impact on communities. This study reveals the high vulnerability of communities in the western highlands of Tanzania to climate change and non-climate stress factors, including seasonal changes in rainfall and temperature, as well as the decrease in crop production and income.
ENVIRONMENTAL DEVELOPMENT
(2024)
Article
Environmental Sciences
Jiahui Qiu, Sharon Seah, Melinda Martinus
Summary: With ASEAN's rapid population and economic growth, its medium-term climate ambition becomes crucial to global mitigation efforts. Although all ASEAN Member States have communicated their ambitions through NDCs, the region still falls short of a 1.5 or 2-degree scenario. Assessing and comparing the NDCs is complex due to varying types of targets and actions. Through an assessment framework, AMS' strategies for raising mitigation ambition are examined, with the need for stronger economy-wide targets identified. Different groups with varying stages of progress in climate ambition among AMS are clarified, along with specific recommendations for each group.
ENVIRONMENTAL DEVELOPMENT
(2024)
Article
Environmental Sciences
Yi Cai, Wene Qi, Famin Yi
Summary: This study evaluates the treatment effects of ICT-based extension service (IES) use on fertilizer knowledge and use efficiency among litchi farm households in southern China. The results show that IES use significantly improves fertilizer effectiveness, procedural and declarative knowledge, and increases fertilizer use efficiency.
ENVIRONMENTAL DEVELOPMENT
(2024)