Nitrogen (N) is used in many of life's fundamental biomolecules, and it is also a participant in
environmental redox chemistry. Biogeochemical processes control the amount and form of N …

Background Knowledge of biological and climatic controls in terrestrial nitrogen (N) cycling
within and across ecosystems is central to understanding global patterns of key ecosystem …

Ammonia-oxidizing microorganisms (AOM) contribute to one of the largest nitrogen fluxes in
the global nitrogen budget. Four distinct lineages of AOM: ammonia-oxidizing archaea …

Largely removed from anthropogenic delivery of nitrogen (N), Antarctica has notably low
levels of nitrogen. Though our understanding of biological sources of ammonia have been …

Integrating light-harvesting materials with microbial biochemistry is a viable approach to
produce chemicals with high efficiency from air, water and sunlight. Yet it remains unclear …

Dissolved oxygen (O2) is essential for most ocean ecosystems, fuelling organisms'
respiration and facilitating the cycling of carbon and nutrients. Oxygen measurements have …

Using 15 N stable isotope as a tracer to quantify N transformation rates in isotope-
enrichment experiments improves understanding of the N cycle in various ecosystems …

There remains a lack of understanding of environmental isotopes and their use; students
and practitioners typically find the concepts of isotope concentrations and partitioning to be …

Abstract Fluoride (F−) and nitrate (NO 3−) in groundwater have caused serious health
problems worldwide. However, in the Chinese Loess Plateau where groundwater is the …

Nitrate pollution is of considerable global concern as a threat to human health and aquatic
ecosystems. Nowadays, δ 15 N/δ 18 O-NO 3− combined with a Bayesian-based SIAR model …