Is the high 15N natural abundance of trees in N-loaded forests caused by an internal ecosystem N isotope redistribution or a change in the ecosystem N isotope mass balance?

Nitrogen isotopes link mycorrhizal fungi and plants to nitrogen dynamics

(2012) Erik A. Hobbie et al.   NEW PHYTOLOGIST

Recovery of ectomycorrhiza after ‘nitrogen saturation’ of a conifer forest

(2010) Peter Högberg et al.   NEW PHYTOLOGIST

Controls of nitrogen isotope patterns in soil profiles

(2009) Erik A. Hobbie et al.   BIOGEOCHEMISTRY

Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability

(2009) Joseph M. Craine et al.   NEW PHYTOLOGIST

Increasing abundance of soil fungi is a driver for 15N enrichment in soil profiles along a chronosequence undergoing isostatic rebound in northern Sweden

(2009) Håkan Wallander et al.   OECOLOGIA

Transformation of the Nitrogen Cycle: Recent Trends, Questions, and Potential Solutions

(2008) J. N. Galloway et al.   SCIENCE