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 …

Nitrogen isotopic studies have the potential to shed light on the structure of ancient
ecosystems, agropastoral regimes, and human-environment interactions. Until relatively …

▪ Abstract The use of stable isotope techniques in plant ecological research has grown
steadily during the past two decades. This trend will continue as investigators realize that …

Equilibrium and kinetic isotope fractionations during incomplete reactions result in minute
differences in the ratio between the two stable N isotopes, 15N and 14N, in various N pools …

We compiled new and published data on the natural abundance N isotope composition
(δ15N values) of soil and plant organic matter from around the world. Across a broad range …

Whole-plant and leaf nitrogen isotope composition are determined by the isotope ratio of the
external nitrogen source and physiological mechanisms within the plant. Whole-plant …

The use of stable isotopes of carbon, nitrogen, oxygen, and hydrogen to study physiological
processes has increased exponentially in the past three decades. When Harmon Craig …

The response of tropical forests to climate change will depend on individual plant species'
nutritional strategies, which have not been defined in the case of the nitrogen nutrition that is …

In this study we show that the natural abundance of the nitrogen isotope 15, δ 15 N, of plants
in heath tundra and at the tundra-forest ecocline is closely correlated with the presence and …

Soil extractable nitrate, ammonium, and organic nitrogen (N) are essential N sources
supporting primary productivity and regulating species composition of terrestrial plants …