Dissolved oxygen (DO)
Dissolved oxygen (DO) on World Data Ocean: a running collection of 2 stories we have gathered and hand-picked because they are worth your time. Every post here touches on dissolved oxygen (do) in some way — the news, the analysis, the deep dives, and the occasional surprise find. A Global Hub for Ocean Intelligence 4 World Data Ocean is a centralized digital platform where researchers, scientists, and ocean enthusiasts converge to explore, analyze, and… New stories are added to this page as we find them, so check back if you want to keep up with what is happening around dissolved oxygen (do), or subscribe to the RSS feed to get them as soon as they are published. Browse the collection below, or head back to the homepage to see everything World Data Ocean is covering right now.
Spatiotemporal extent of diel and episodic hypoxia in bottom water of a shallow, well-mixed estuary
Globally, declining dissolved oxygen levels represent a critical ecological challenge for coastal regions. This study investigates the spatiotemporal dynamics of hypoxia within the Banana River Lagoon, a shallow subtropical estuary, revealing its impact on fish populations and nutrient cycles. Utilizing a network of 80 monitoring stations, researchers documented significant diel and seasonal variations in bottom water oxygen concentrations, correlated with temperature, light, and sediment composition. Notably, areas near organic-rich sediments experienced more frequent daytime hypoxia.
Spatial and temporal use of a tropical nursery habitat by juvenile blacktip sharks (Carcharhinus limbatus)
Juvenile blacktip sharks (*Carcharhinus limbatus*) critically rely on nearshore nursery habitats during early development, yet their habitat use remains poorly understood in regions like the Hawaiian Islands. A recent study utilizing acoustic telemetry tracked 29 juvenile blacktip sharks within Hilo Bay, Hawai’i, revealing its designation as the first confirmed nursery habitat in Hawaiian waters. Sharks exhibited year-round residency, with peak presence from March to August, and demonstrated a preference for deeper waters at night, potentially linked to foraging behavior.