They found that denitrification was the most critical process controlling the nitrogen removal from the coastal sediments, which accounted for roughly 90% of the total removal of nitrogen.
The denitrification process in sediments was directly associated with bacterial diversity and microbial functional gene abundance, and it was indirectly affected by abiotic factors such as temperature, oxygen content and soluble organic carbon concentration.
According to the researchers, the annual flux of sedimentary denitrification in the coastal areas alongside the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea is estimated to be 9.2 Tg nitrogen year-1, approximately accounting for 4% of the global ocean denitrification rate.
These findings are of great significance for further understanding of nitrogen cycles in marine and offshore ecosystems.
The study titled "Biotic and abiotic controls on dinitrogen production in coastal sediments" has been published in Global Biogeochemical Cycles, and it was supported by the Key Research Program for Frontier Sciences of CAS and the Youth Promotion Association of CAS.
In recent years, environmental pollution problems caused by swine production have created substantial concern in China.Swine wastewater is characterized by high levels of ammonia nitrogen (NH4+-N), suspended solids (SS), and chemical oxygen demand (COD). Using a N mass ba...
To determine the effects of warming on fine root traits of woody plants, Dr. ZHAO Xiaoxiang from the Wuhan Botanical Garden conducted a meta-analysis based on 431 paired observations of 13 fine root traits from 78 studies around the world.
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