Article
Limnology
Ivia Closset, Heather M. McNair, Mark A. Brzezinski, Jeffrey W. Krause, Kimberlee Thamatrakoln, Janice L. Jones
Summary: The California Current System experiences strong seasonal variations in water properties, circulation, and productivity, with a warm anomaly known as the Blob affecting upwelling dynamics and diatom production. The nutrient supply to the euphotic zone decreased by 50% during the Blob, but local production during individual upwelling events was minimally impacted. Persistent biological hotspots with high biomass, depleted nutrients, and high specific production rates were observed throughout the study period.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Engineering, Environmental
Ping Sun, Ying Wang, Xin Huang, Bangqin Huang, Lei Wang
Summary: This study reveals the drivers and mechanisms shaping protist-bacteria microbiota in a river-influenced coastal upwelling system using 16S and 18S ribosomal RNA sequencing. It shows that water mass, temperature, and biotic/abiotic factors collectively shape the microbial distribution. Deterministic and stochastic processes both play a role in community assembly, with deterministic processes being more important for bacteria and pronounced in upwelling communities.
Article
Environmental Sciences
Se Hyeon Jang, Prisca Lim, Olivia Torano, Erika F. Neave, Harvey Seim, Adrian Marchetti
Summary: This study conducted an intensive oceanographic survey in the Galapagos Marine Reserve in 2018 to explore the composition and ecological significance of marine protists. The results showed that the region influenced by the Equatorial Undercurrent had higher chlorophyll-a concentrations and abundances of protistan grazers. Additionally, a dinoflagellate bloom heavily influenced by upwelling of the Equatorial Undercurrent was observed in the western archipelago. These findings provide new insights into the composition and potential roles of micrograzers in structuring protistan communities in the Galapagos Archipelago.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Rui Yang, Weimin Sun, Lifang Guo, Baoqin Li, Qi Wang, Duanyi Huang, Wenlong Gao, Rui Xu, Yongbin Li
Summary: Microorganisms can mediate the transformation of antimony and arsenic, thereby altering their mobility and toxicity. The contamination of antimony and arsenic has different effects on the alpha and beta diversities of protistan communities and their ecological networks. Arsenic contamination has a greater impact on protistan communities compared to antimony contamination.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Oscar E. Romero, Simon Ramondenc
Summary: This study assesses the variations of diatom community in the Mauritanian coastal upwelling system over a continuous period of 17 years. The results show that diatom flux is highest in spring and summer, and different types of diatom populations vary with atmospheric and hydrologic conditions.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Plant Sciences
Shun Liu, Mattia Storti, Giovanni Finazzi, Chris Bowler, Richard G. G. Dorrell
Summary: Diatoms, an important group of algae, contribute significantly to marine photosynthetic activity. This study analyzed the plastid transporters in diatoms and discovered both similarities and differences compared to plant plastid transporters. Diatom-specific transporter functions, related to carbon and amino acid transport and plastid-mitochondria crosstalk, were identified. Environmental data also suggested that plastid transporters may play a role in diatom sensitivity to ocean warming.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Guilherme D. Ferreira, Afroditi Grigoropoulou, Enric Saiz, Albert Calbet
Summary: Sudden environmental changes like marine heatwaves will become more intense and frequent in the future, and understanding the physiological responses of key members of marine food webs to temperature is crucial. This study investigated the acute responses of mixoplankton and protozooplankton to a range of temperatures and found that ciliates have higher optimal temperatures than dinoflagellates and that protozooplankton is better adapted to warming than mixoplankton. The results also showed that warmer temperatures decrease cellular volumes, with grazing being the most affected rate in protozooplankton and a decrease in grazing but an increase in photosynthesis in mixoplankton. This suggests the need for reassessing the position of mixoplankton in climate change models and further studies on the multigenerational response to temperature changes.
MARINE ENVIRONMENTAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Katharine Hendry, Oscar Romero, Vanessa Pashley
Summary: Eastern boundary upwellings (EBUs) are important coastal systems that contribute significantly to marine organic carbon fixation. Understanding past changes in diatom productivity through sediment archives can provide insights into the sensitivity of EBUs to future climate perturbations.
CLIMATE OF THE PAST
(2021)
Article
Environmental Sciences
Hanae Belmajdoub, Khalid Minaoui, Anass El Aouni, Karim Hilmi, Rachid Saadane, Abdellah Chehri
Summary: This article introduces the seasonal variations in upwelling dynamics along Morocco's Atlantic coast and develops a new methodology to compute an upwelling index based on sea surface temperature analysis. The proposed index is simple, efficient, and improves the analysis and quantification of seasonal and interannual variations.
Article
Ecology
Vittorio Boscaro, Vittoria Manassero, Patrick J. Keeling, Claudia Vannini
Summary: This study investigated natural populations of Euplotes using a single-cell microbiomic approach and found a high variability in symbiotic communities, with individual hosts harboring different sets of bacterial endosymbionts. Accessory symbionts showed large variability in affinity, and competitive exclusion was observed.
Article
Geochemistry & Geophysics
Anass El Aouni, Khalid Daoudi, Khalid Minaoui, Hussein Yahia
Summary: Analyzing and studying coastal upwelling using sea surface temperature (SST) satellite images is a common and cost-effective procedure. A robust method based on the Ekman theory is proposed to identify upwelling regions along the north-west African margin, overcoming issues encountered in previous methods. This method can serve as a framework to study and monitor the spatio-temporal variability of upwelling phenomenon in the region.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2021)
Article
Microbiology
Takehiko Sahara, Takumi Adachi, Tadashi Nagamine, Toru Fukano, Naoki Morita
Summary: We sequenced the draft genome of thraustochytrid strain 12B, which exhibits high production of polyunsaturated fatty acids like docosahexaenoic acid. The draft genome sequence, approximately 65 Mbp, will provide insights into metabolic engineering for enhancing the production of polyunsaturated fatty acids in this microorganism.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2023)
Editorial Material
Biotechnology & Applied Microbiology
Xiao-Man Sun, Ying-Shuang Xu, He Huang
Summary: Thraustochytrids can accumulate high biomass and lipid content, exhibit broad substrate utilization capacity and effective metabolic pathways without genetic modification, showing great promise for future development.
TRENDS IN BIOTECHNOLOGY
(2021)
Article
Marine & Freshwater Biology
Lam Nguyen-Ngoc, Sarah C. Weber, Hai Doan-Nhu, Ajit Subramaniam, Maren Voss, Joseph P. Montoya
Summary: The South China Sea is a complex and dynamic marginal sea with great economic importance. It experiences strong seasonal forcing from the monsoon cycle, which affects river runoff and circulation. A study found a wide distribution of host diatoms and Diatom-Diazotroph Associations (DDAs) in different habitats of the South China Sea, with the lowest infection rates and intensities in waters affected by coastal upwelling.
Article
Ecology
Ellie Wolfe, Francesco Cerini, Marc Besson, Duncan O'Brien, Christopher F. Clements
Summary: Temperature is a crucial factor shaping species' vital rates, coexistence, extinctions and community composition. However, little research has considered the spatiotemporal dynamics of thermal variation in community-level investigations. In this microcosm experiment, we examined the effects of synchronously or asynchronously fluctuating temperatures on communities in two-patch landscapes connected by short or long corridors. Our results showed that corridor length influenced the trajectory of diversity change in communities, while the type of thermal variation significantly affected both the temporal dynamics of diversity change and final community composition.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)