When the blue dye resazurin encounters living microorganisms, it transforms into fluorescent pink resorufin and helps scientists understand ecosystem respiration, but it has its limitations.
rivers
Posted inResearch Spotlights
Antarctica’s Seasonal Streams Contribute Iron to the Ross Sea
Analysis of nutrient concentrations in four streams that discharge to the Southern Ocean indicates they are important sources of iron and phosphorous for coastal phytoplankton communities.
Posted inResearch Spotlights
Through Flood and Drought: Reconstructing the Yellow River
Tree ring chronologies fill in gaps in the historical record and offer insights into the natural flow of China’s Yellow River.
Posted inNews
Largest Delta Plain in Earth’s History Discovered in Arctic
If this Triassic period delta existed today, its footprint would equal about 1% of all land on Earth.
Posted inFeatures
The Renaissance of Hydrology
Hydrology has evolved as a transdisciplinary, data-driven science in a remarkably short period of time.
Posted inNews
Ancient River Discovery Confirms Mediterranean Nearly Dried Up in the Miocene
Sedimentary deposits reveal a Nile-sized river system flowing from what are today Turkey and Syria.
Posted inResearch Spotlights
When the River Meets the Sea: Estuary Sediments and Hypoxia
Scientists know that low-oxygen dead zones are growing worldwide. New research sheds light on what that will mean for estuary systems if trends continue.
Posted inEditors' Highlights
Using Radioactive Tracers to Determine the Ages of Streamflow
Radioactive isotope tracers can be used to determine the relationship between the ages of water that is stored in soil and bedrock, water in streams, and the water used by vegetation.
Posted inNews
Some Waterfalls May Be Self-Made
Waterfalls sometimes imply a past dramatic event, like tectonic uplift or a landslide. Self-formed waterfalls could challenge that interpretation.
Posted inEditors' Highlights
Formation of Sedimentary Deposits: Bypass Versus Mass Extraction
Grain size and sediment delivery pathways from the Ganges delta have been used to model downstream facies changes.