For example, some cyanobacteria have structures called heterocysts that provide a low-oxygen ... a change in carbon storage, thus impacting more processes than just the nitrogen cycle.

Oxygen, the most critical resource for life on Earth, plays an important role in other nutrient cycles such as carbon and nitrogen. Oxygen depletion in ... a global model that describes the entire ...

A new study reveals significant changes in the global freshwater oxygen cycle. Rivers, streams, lakes, and reservoirs aren’t just beautiful features of the landscape, they’re vital to life on Earth.

So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that maintain life, said Donald Canfield, a geobiologist at the University of ...

Skoltech researchers have theoretically investigated the wide range of molecules that oxygen and ... a trace of nitrogen while examining compounds known as oxocarbons, or carbon oxides.

Because nitrogenase can be inhibited by oxygen, free-living organisms behave as anaerobes or microaerophiles while fixing nitrogen. Because of the scarcity of suitable carbon and energy sources ...

Rivers, lakes, and reservoirs have always been Earth's hidden lungs — breathing life through the oxygen they cycle ... powering the vital cycles of carbon and nitrogen. Yet, oxygen levels ...