Article
Limnology
Jongsun Kim, Mark J. Brush, Bongkeun Song, Iris C. Anderson
Summary: Estuarine primary production (PP) is a critical rate process for understanding ecosystem function and response to environmental change, but it can be influenced by various factors such as nutrient management, warming, altered hydrology, and harmful algal blooms. The increase in PP in the York River Estuary is associated with higher water temperature, decreased turbidity, and increased light availability, indicating phytoplankton have become more efficient at converting nutrients into biomass.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Jun Zhou, Zhuo-Yi Zhu, Huan-Ting Hu, Gui-Ling Zhang, Qian-Qian Wang
Summary: The study revealed that oxygen depletion in the near-bottom waters off the Changjiang Estuary is caused by water column respiration and sedimentary oxygen respiration, with contributions of 53% and 47% respectively to the total apparent oxygen utilization. Below the pycnocline, the contribution of water column respiration to the total AOU varied from 24% to 69%, while sedimentary oxygen respiration varied from 31% to 76%.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Leon Serre-Fredj, Leo Chasselin, Orianne Jolly, Pascal Claquin
Summary: The Seine estuary is a typical model of a system where reducing phosphorus (P) inputs alone led to nutrient balance disturbance and the presence of massive blooms. Sampling and analysis of the estuary revealed that light availability and nutrient concentrations, especially in late spring and summer, were the main drivers of primary production and phytoplankton dynamics. The blooms observed in a specific area of the estuary were attributed to the local effect of tide slowdown, while the role of phosphate as a limiting nutrient was not clear.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Ecology
Philippe Cherabier, Regis Ferriere
Summary: The response of ocean primary production to climate warming is affected by microbial loop activity and bacterial adaptation, which can reverse the negative impacts of climate warming through bacterial adaptation.
Article
Environmental Sciences
Ute Daewel, Naveed Akhtar, Nils Christiansen, Corinna Schrum
Summary: A numerical modeling study suggests that atmospheric wakes caused by offshore wind farms in the North Sea can have significant impacts on marine ecosystems, affecting both surface ocean and seafloor. The study shows that wind wakes from offshore wind farms can lead to large-scale changes in annual primary production and alter sediment carbon and oxygen concentration in the southern North Sea.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Kasper Hancke, Svein Kristiansen, Lars Chresten Lund-Hansen
Summary: Arctic summer sea ice is melting and forming melt ponds, which are understudied but potentially important for carbon turnover. This study reports on ice algal mats collected from melt ponds in the northern Barents Sea, showing high carbon assimilation and primary production rates comparable to benthic microalgae in temperate tidal flats. These dense ice algal mats may be an important source of organic carbon in the Arctic food-web and sensitive to climate driven changes.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Daniel R. Bondyale-Juez, Vanesa Romero-Kutzner, Jennifer E. Purcell, Ico Martinez, Theodore T. Packard, May Gomez
Summary: This study investigates the composition and metabolism of Physalia physalis and Velella velella compared to pulsating jellyfish, Aurelia aurita and Pelagia noctiluca. The results indicate that wind-driven propulsion has lower respiration compared to pulsation-driven propulsion in these organisms, and the hydrozoans show a different biochemical composition compared to other gelatinous zooplankton.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Brandon M. Jarvis, James D. Hagy III, Wilson Melendez, Cody W. Simmons, Yongshan Wan
Summary: Hypoxia, caused by excessive nitrogen and phosphorus, is common in coastal waterbodies. This study focused on diel-cycling hypoxia in shallow and highly productive estuaries, using continuous monitoring data and simulation models. The results showed consistent low oxygen conditions and significant vertical gradients in near bottom dissolved oxygen, demonstrating the need for detailed measurements and accurate simulation models in understanding oxygen dynamics in shallow estuaries.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Limnology
Noah R. Lottig, Joseph S. Phillips, Ryan D. Batt, Facundo Scordo, Tanner J. Williamson, Stephen R. Carpenter, Sudeep Chandra, Paul C. Hanson, Chistopher T. Solomon, Michael J. Vanni, Jacob Zwart
Summary: This study compared the estimates of primary production using C-14 incubations and free-water O-2 methods in lake ecosystems, finding that 61% of the C-14 production estimates overlapped with the free-water O-2 production estimates within the 95% credible intervals. There was little difference in the daily estimates of primary production based on the selection of free-water O-2 or C-14 approaches in these lakes during summer stratified conditions.
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2022)
Article
Oceanography
Yongsheng Cui, Jiaxue Wu, Ehui Tan, Shuh-Ji Kao
Summary: This study investigates the role of particle resuspension in maintaining hypoxia levels in the Pearl River Estuary. It finds that suspended particles caused by resuspension, rather than settling, are concentrated near the front of shelf salinity intrusions where bottom hypoxia occurs. The depletion of dissolved oxygen (DO) caused by particle resuspension is comparable to sediment oxygen demand, highlighting the importance of considering particle resuspension in coastal hypoxia research.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Environmental Sciences
Michele A. Burford, Stephen J. Faggotter
Summary: Estuaries in the tropical Gulf of Carpentaria in Australia are facing increasing pressure from catchment water development. The addition of nutrients can stimulate mudflat primary production, with the Flinders estuary being the most productive of the three. However, excessive water development may impact productivity in these estuaries.
MARINE POLLUTION BULLETIN
(2021)
Article
Critical Care Medicine
Anne Kirstine Hoeyer-Nielsen, Mathias J. Holmberg, Anne Grossestreuer, Tuyen Yankama, Jean-Pierre Branton, Michael W. Donnino, Katherine M. Berg
Summary: The VO2:lactate ratio was significantly higher in survivors, while there was no association between median VO2 alone and survival. There was a significant difference in change in VCO2 over time between survivors and non-survivors.
Article
Ecology
Kukka-Maaria Kohonen, Roderick Dewar, Gianluca Tramontana, Aleksanteri Mauranen, Pasi Kolari, Linda M. J. Kooijmans, Dario Papale, Timo Vesala, Ivan Mammarella
Summary: This study evaluates four different methods for estimating photosynthesis at the ecosystem scale. The results show that CO2-based methods and COS-based methods give slightly different estimates of GPP at different timescales, with the COS-based methods generally giving higher estimates. Furthermore, developing LRUCAP based on a physiological model may be more robust than LRUPAR based on an empirical relation.
Article
Endocrinology & Metabolism
Olena Mackert, Eva Katrin Wirth, Rongwan Sun, Jennifer Winkler, Aoxue Liu, Kostja Renko, Severine Kunz, Joachim Spranger, Sebastian Brachs
Summary: Alterations in mitochondrial function are closely associated with the development of various diseases. Accurate assessment of mitochondrial function ex vivo remains challenging. In this study, a novel method was used to measure mitochondrial oxygen consumption and extracellular acidification rate in metabolically relevant tissues, revealing the impact of metabolic stressors and aging on mitochondrial function.
MOLECULAR METABOLISM
(2022)
Article
Ecology
Irene E. Teubner, Matthias Forkel, Benjamin Wild, Leander Moesinger, Wouter Dorigo
Summary: The study focuses on utilizing VOD to estimate global vegetation productivity, and finds that including temperature factor improves the model performance across different regions, with less improvement observed in tropical regions. The VOD-GPP model is able to capture the response of GPP to water availability, and in some regions, the model performance shows negative or positive correlations with SPEI.
