Biological soil crusts accelerate the nitrogen cycle through large NO and HONO emissions in drylands.

@article{Weber2015BiologicalSC,
  title={Biological soil crusts accelerate the nitrogen cycle through large NO and HONO emissions in drylands.},
  author={Bettina Weber and Dianming Wu and Alexandra Tamm and Nina Ruckteschler and Emilio Rodr{\'i}guez-Caballero and J{\"o}rg Steinkamp and Hannah Meusel and Wolfgang Elbert and Thomas E. Behrendt and M S{\"o}rgel and Yafang Cheng and Paul J. Crutzen and Hang Su and Ulrich P{\"o}schl},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2015},
  volume={112 50},
  pages={
          15384-9
        }
}
Reactive nitrogen species have a strong influence on atmospheric chemistry and climate, tightly coupling the Earth's nitrogen cycle with microbial activity in the biosphere. Their sources, however, are not well constrained, especially in dryland regions accounting for a major fraction of the global land surface. Here, we show that biological soil crusts (biocrusts) are emitters of nitric oxide (NO) and nitrous acid (HONO). Largest fluxes are obtained by dark cyanobacteria-dominated biocrusts… CONTINUE READING
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