AbstractBy disturbing the upper ocean, typhoons may play a crucial role in marine ecosystems. Previous studies mostly demonstrated surface chlorophyll a (Chl a) increase under typhoon conditions. By using satellite data and a physical–biogeochemical model, however, we show that approximately 49% of typhoons crossing the northern shelf of the South China Sea induced surface Chl a decline. Cases with ...
AbstractAquaculture sector growth is challenged by feed constraints, particularly the erratic availability and cost of fishmeal and oil from wild forage fish. Limited attention is given to the risks that forage fish shortfalls pose to aquaculture feed supplies. Here we develop a shortfall impact model to investigate the effects of varying forage fish supply scenarios on global fed aquaculture. Results ...
AbstractThe diazotrophic cyanobacterium Trichodesmium is sensitive to ultraviolet (UV) radiation under phosphate (P)-replete conditions, but little is known about UV impacts on its physiology under P-limitation. Here we show that periodic exposures to low or moderate levels of UV (4–12 W m−2 UVA, 0.5–1 W m−2 UVB) under P-limited (0.5 μM) conditions enhanced its growth by approximately 31%...
AbstractDocumenting changes in the Arctic sea-ice variability are essential for understanding the spring sea-ice predictability barrier. While Tibetan Plateau snow cover (TPSC) has been linked to Arctic sea-ice variability, the spatiotemporal stability of this relationship remains unclear. In this study, combing satellite observations and snow experiments, we identified a shift in connections between ...
AbstractAs climate awareness grows, investors are integrating climate performance into their investment decision-making processes to mitigate potential risks. This paper examines the societal costs associated with the carbon footprints of publicly listed companies in China and explores whether investors demand compensation for their exposure to risks associated with investments in assets with greater ...
AbstractIron (Fe) is an essential nutrient that limits primary productivity in vast regions of the oceans. Ongoing increases in ocean carbon dioxide (CO2) concentrations can affect both Fe availability and its requirement by phytoplankton, potentially impacting carbon fixation and the growth of Fe-limited phytoplankton. The cyanobacterium Synechococcus is one of the most ubiquitous phytoplankton groups ...
AbstractDinitrogen (N2) fixation by diazotrophs forms a critical control on ocean productivity, yet our understanding of the distribution, abundance and activity of these microorganisms is informed by observations with limited geographical coverage. Here we show that the unicellular N2-fixing cyanobacterium, UCYN-B, drives high N2 fixation rates in the western North Pacific. Defining the ecological ...
AbstractEstuaries are essential for the ocean's mass balance of terrestrial dissolved organic matter (DOM). Dissolved black carbon (DBC) constitutes the largest known persistent fraction of DOM in marine environments. However, the alterations of DBC during its transport through estuaries remain largely unknown. In this study, we conducted six sampling cruises across three estuaries in China, which ...
AbstractOceanic subsurface eddies are believed to potentially impact biogeochemical cycles; however, our understanding remains limited due to sparse in situ observations. This study presents observation of an intrathermocline eddy (ITE) in the tropical western North Pacific and provides a comprehensive analysis of how ITE modulate nutrient dynamics by both diapycnal mixing and lateral transport. Pronounced ...
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