Nitrogen (N) transformation, particularly Nitrogen mineralization (Nm) is closely linked to temperature, and ongoing climate warming will profoundly affect the mineralization process and alter ecosystem N cycling.

However, little information is available on the mechanisms behind the response of Nm to prolonged warming coupled with drought in soils covered by biocrusts.

Recently, scientists from the Northwest Institute of Eco-Environment and Resources of Chinese Academy of Sciences investigated the rate of soil N transformation, enzyme activity and gene abundance in response to warming coupled with reduced precipitation by using open top chambers.

They examined enzyme activity and microbial functional gene diversities of biocrusts along a succession sequence under increased temperatures and reduced precipitation in the Tengger Desert to determine the mechanisms underlying changes in soil net Nm rates in biocrusts-covered ecosystems.

This study provides a basis for identifying the functional genes involved in key processes in the N cycle in temperate desert ecosystems, which further highlight the importance of different biocrusts organisms in the N cycle in temperate deserts as Earth becomes hotter and drier.

This study has been published in the Science of the Total Environment in an article entitled “The mechanism of soil nitrogen transformation under different biocrusts to warming and reduced precipitation: From microbial functional genes to enzyme activity”.

Contact:

HU Rui

E-mail: hurui@lzb.ac.cn

Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, China.