Determining diet is a key prerequisite for understanding species interactions, food web
structure and ecological dynamics. In recent years, there has been considerable …

Plant water uptake from the soil is a crucial element of the global hydrological cycle and
essential for vegetation drought resilience. Yet, knowledge of how the distribution of water …

Abstract Groundwater nitrate (NO 3−) pollution is a worldwide environmental problem.
Therefore, identification and partitioning of its potential sources are of great importance for …

The ongoing evolution of tracer mixing models has resulted in a confusing array of software
tools that differ in terms of data inputs, model assumptions, and associated analytic products …

Over the past decades, groundwater quality has deteriorated worldwide by nitrate pollution
due to the intensive use of fertilizers in agriculture, release of untreated urban sewage and …

Reducing cropland ammonia (NH3) emissions while improving air quality and food supply is
a challenge, particularly in China where there are millions of smallholder farmers. We tested …

Atmospheric ammonia (NH3) and ammonium (NH4+) can substantially influence air quality,
ecosystems, and climate. NH3 volatilization from fertilizers and wastes (v-NH3) has long …

Stable isotope mixing models are increasingly used to quantify consumer diets, but may be
misused and misinterpreted. We address major challenges to their effective application …

Water stable isotopes (18O and 2H) are widely used as ideal tracers to track water through
the soil and to separate evaporation from transpiration. Due to the technical developments in …

Stable isotopes of carbon, nitrogen, and sulfur are used as ecological tracers for a variety of
applications, such as studies of animal migrations, energy sources, and food web pathways …