Article
Environmental Sciences
S. Krishna Niveditha, C. K. Haridevi, Revati Hardikar, Anirudh Ram
Summary: This study examines the phytoplankton assemblage and chlorophyll a along the salinity gradient and oxygen zonation in Ulhas Estuary. The results show that the estuary experiences oxic conditions in the euhaline region due to oxygenated coastal waters, while the poly-meso-oligohaline region is hypoxic because of pollution from industrial effluents, domestic/sewage, and agricultural discharges. Anthropogenic nutrients also contribute to phytoplankton biomass and hypoxia. The study finds that diatoms dominate in the euhaline-oxic region, but their contribution decreases significantly in the oligohaline region. Cyanophytes and chlorophytes govern the meso to oligohaline region due to their tolerance for low salinity and high dissolved inorganic nutrients. The Carlson's Trophic State Index further confirms the estuary's eutrophic state, and the study identifies the adaptation of cyanophytes and chlorophytes to oxygen-deficient water.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Marco Bartoli, Sara Benelli, Marta Lauro, Monia Magri, Irma Vybernaite-Lubiene, Jolita Petkuviene
Summary: Harmful blooms of cyanobacteria in the Curonian Lagoon may persist for long periods due to self-sustaining mechanisms. Sediment analyses revealed that settled blooms may increase redox-dependent phosphorous release, disrupting the stoichiometry of benthic nutrient regeneration.
ESTUARIES AND COASTS
(2021)
Article
Environmental Sciences
Hanna Siwek, Joanna Podlasinska
Summary: This study presents a case study on fish mortality in the lower Oder River during an ecological disaster in August 2022, attributing the death to hypoxia caused by reduced dissolved oxygen. The research also highlights the trophic threats to the studied Oder River section linked to the disaster. Long-term monitoring shows threats of excess biogenic compounds, organic matter, and bacterial contamination.
Article
Environmental Sciences
Christopher D. D. Knightes
Summary: Anthropogenic sources of nutrients lead to eutrophication in coastal waters. This study developed a mechanistic, mass balance fate and transport modeling framework to improve the understanding of hypoxia processes in Narragansett Bay. The simulations captured general trends and patterns of dissolved oxygen (DO), but could not capture the wide diurnal variation observed. Different sources of nutrients were found to affect DO in different layers, with tributary sources affecting upper layers and sediment oxygen demand and nutrient fluxes affecting deeper waters. This work emphasizes the importance of understanding and simulating the legacy effects of historic nutrient loading for long-term recovery.
Review
Plant Sciences
Noureddine Benkeblia
Summary: Aerobic respiration and oxygen consumption are indicators of routine metabolic rate, with the reduction of available O-2 leading to hypoxia and a switch to fermentative glycolysis in the absence of O-2. Research on the effects of postharvest hypoxia and anoxia treatment on fresh crops is abundant, however, less is known about tropical commodities. Omics technologies have provided valuable insights into the physiological and biochemical responses of crops to low or absence of oxygen.
FRONTIERS IN PLANT SCIENCE
(2021)
Review
Physiology
Jean-Paul Richalet
Summary: Hypoxia has gained widespread attention due to the Nobel Prize in Medicine/Physiology in 2019 and the recent COVID-19 pandemic. Research on the effects of oxygen lack dates back to the mid-19th century, with the term hypoxia first appearing in 1938 and becoming prominent in clinical practice in the 1940s.
JOURNAL OF APPLIED PHYSIOLOGY
(2021)
Article
Environmental Sciences
Zeyu Zeng, William W. L. Cheung, Han Lai, Huadong Yi, Sheng Bi, Haiyang Li, Xiaoli Chen, Yuqin Su, Xuange Liu, Qiuxian Chen, Zhilun Zhang, Xuchong Wei, Jiahui Chen, Guifeng Li
Summary: Coastal fishery resources are facing threats from environmental changes and human activities. This study focuses on the Pearl River Estuary (PRE) and investigates the impacts of human disturbances on the demersal fish community. The results show that dissolved oxygen and temperature have significant correlations with the functional traits of the fish community, and the impacts of hypoxia vary among species and locations. The study concludes that the high functional redundancy in the PRE may not be enough to buffer against environmental disturbances due to its low functional diversity.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Frederick Feyrer, Matthew Young, Tamara Kraus, Elizabeth Stumpner, Darren Fong, Kurt D. Carpenter
Summary: This study examines a fish kill event in a coastal lagoon and identifies hypoxia caused by strong winds and nutrient transport as the main factors leading to the death of the fish. The event resulted in significant mortality of the endangered species Tidewater Goby and other fish and macroinvertebrates. The findings suggest that similar events may occur in coastal lagoons with limited freshwater inflows.
ESTUARIES AND COASTS
(2023)
Article
Biodiversity Conservation
Stephen F. Jane, Joshua L. Mincer, Maximilian P. Lau, Abigail S. L. Lewis, Jonathan T. Stetler, Kevin C. Rose
Summary: The concentration of dissolved oxygen is important for aquatic ecosystems. A study on lakes found that most lakes have experienced summertime increases in the amount of water below ecologically important threshold concentrations, indicating a reduction in habitat and potential changes in lake chemistry. These trends are expected to be exacerbated by future warming.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
Celine E. J. van Bijsterveldt, Bregje K. van Wesenbeeck, Sri Ramadhani, Olivier Raven, Fleur E. van Gool, Rudhi Pribadi, Tjeerd J. Bouma
Summary: Although mangrove forests are relatively resilient to partial burial by plastic waste, our study shows that the abundance of plastic litter in mangroves can have negative impacts on vegetation growth and tree survival. Trees with 50% plastic cover exhibited surprising resilience, but trees with 100% plastic cover showed significantly decreased leaf area index and survival rates. This highlights the importance of addressing plastic pollution in mangrove ecosystems to prevent further deterioration of mangrove stands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Biochemistry & Molecular Biology
Romain Carcy, Marc Cougnon, Mallorie Poet, Manon Durandy, Antoine Sicard, Laurent Counillon, Nicolas Blondeau, Thierry Hauet, Michel Tauc, Didier F. Pisani
Summary: Disorders characterized by ischemia/reperfusion (I/R) are the most common causes of debilitating diseases and death in stroke, cardiovascular ischemia, acute kidney injury or organ transplantation. During transplantation, the I/R step defines both the amplitude of the damages to the graft and the functional recovery outcome. Oxidative stress plays a crucial role in cell death and tissue damage, and finding treatments to reduce or prevent oxidative stress in ischemic pathologies is a key goal for better outcomes in organ transplantation.
FREE RADICAL BIOLOGY AND MEDICINE
(2021)
Article
Biodiversity Conservation
James D. Hagy III, Betty J. Kreakie, Marguerite C. Pelletier, Farnaz Nojavan, John A. Kiddon, Autumn J. Oczkowski
Summary: One of the goals of coastal ecological research is to describe, quantify and predict human effects on coastal ecosystems. By using previous data and information, we have developed a predictive approach to assess the condition of coastal ecosystems. This method can help us understand and interpret the impact of environmental variables on ecosystem condition, and predict future changes.
ECOLOGICAL INDICATORS
(2022)
Article
Fisheries
Jason D. Thiem, Lee J. Baumgartner, Ben Fanson, Aleksey Sadekov, Zeb Tonkin, Brenton P. Zampatti
Summary: Understanding the spatial and temporal scales of key population processes is crucial for effective recovery actions in fisheries management. The study on three potamodromous species in the Darling River showed that golden perch were mainly locally spawned, while Murray cod were mainly lifelong residents and silver perch mostly immigrated from the Murray River. Recovery actions in the Darling River should consider the relevant spatial and temporal scales of life history processes.
MARINE AND FRESHWATER RESEARCH
(2022)
Article
Engineering, Environmental
Carl Rolff, Jakob Walve, Ulf Larsson, Ragnar Elmgren
Summary: In recent decades, even with large inflows of oxygen-rich seawater, the Baltic Proper is still experiencing oxygen deficiency below the halocline. The study shows that since the early 1990s, oxygen levels below 65m have been gradually decreasing, and the total oxygen debt (Sigma OD) required to oxidize hydrogen sulphide and ammonium during stagnation periods has been increasing. The highest level of the Sigma OD was observed after a major inflow in 2014. The migration of the Sigma OD to shallower sub-halocline waters in the western and northern basins has increased the risk of coastal hypoxia and export of hypoxic water to the Bothnian Sea.
Article
Marine & Freshwater Biology
Scott D. Roloson, Michael R. S. Coffin, Kyle M. Knysh, Michael R. van den Heuvel
Summary: This study used acoustic telemetry and continuous monitoring of oxygen and temperature to investigate the ecological characteristics of rainbow trout in the eutrophic Dunk River estuary on Prince Edward Island, Canada. Results suggest that the success of rainbow trout in eutrophic environments depends on a trade-off with water quality.
Article
Chemistry, Applied
Nirali N. Shah, Chandrahas Vishwasrao, Rekha S. Singhal, Laxmi Ananthanarayan
FOOD HYDROCOLLOIDS
(2016)
Article
Food Science & Technology
Sonal Chaple, Chandrahas Vishwasrao, Laxmi Ananthanarayan
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2017)
Article
Food Science & Technology
Chandrahas Vishwasrao, Laxmi Ananthanarayan
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2016)
Article
Agriculture, Multidisciplinary
Chandrahas Vishwasrao, Laxmi Ananthanarayan
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2017)