The following citations were erroneously omitted from the ‘References’:

Groffman PM, Zak DR, Christensen S, Mosier A, Tiedje JM. 1993. Early spring nitrogen dynamics in a temperate forest landscape. Ecology74: 1579–1585.

Handley LL, Brendel O, Scrimgeour CM, Schmidt S, Raven JA, Turnbull MH, Stewart GR. 1996. The 15N natural abundance patterns of field-collected fungi from three kinds of ecosystems. Rapid Communications in Mass Spectrometry10: 974–978.

Handley LL, Daft MJ, Wilson J, Scrimgeour CM, Ingleby K, Sattar, MA. 1993. Effects of the ecto- and VA-mycorrhizal fungi Hydnagium carneum and Glomus clarum on the δ15N and δ13C values of Eucalyptus globulus and Ricinus communis. Plant, Cell and Environment16: 375–382.

Handley LL, Odee D, Scrimgeour CM. 1994. δ15N and δ13C patterns in savanna vegetation: dependence on water availability and disturbance. Functional Ecology8: 306–314.

Handley LL, Raven JH. 1992. The use of natural abundance of nitrogen isotopes in plant physiology and ecology: commissioned review. Plant, Cell and Environment15: 965–985.

Handley LL, Scrimgeour CM. 1997. Terrestrial plant ecology and 15N natural abundance: the present limits to interpretation for uncultivated systems with original data from a Scottish old field. Advances in Ecological Research27: 133–212.

Hansen AP, Pate JS. 1987. Evaluation of the 15N natural abundance method and xylem sap analysis for assessing N2 fixation of understorey legumes in jarrah (Eucalyptus marginata Donn ex Sm.) forest in S.W. Australia. Journal of Experimental Botany38: 1446–1458.

New Phytologist apologizes unreservedly to all authors of the above papers for this error.