Foliar δ15N patterns along successional gradients at plant community and species levels

Lixin Wang, Pei Jen Lee Shaner, Stephen Macko

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25 Citations (Scopus)


Relationships to 15N abundances have been found in aridity, rainfall, soil age and latitudinal gradients across large spatial and temporal scales and patterns at intermediate spatial and temporal scale remain unclear. An investigation on 15N abundances at intermediate spatial and temporal scale was conducted in a series of successional fields (Blandy Experimental Farm) in northern Virginia. Foliar and soil samples were collected from these fields in mid-summer 2004 and 2005. The results showed that foliar δ15N signatures decreased as successional age increased at both the plant community and species levels. There were also significant decreases in soil δ15N as succession proceeded. These results provide a clear example that δ15N signatures in certain ecosystems, like an early successional field, could change significantly at time scales within human lifespans and such dynamics should be considered when modeling δ15N spatial patterns.

Original languageEnglish
Article numberL16403
JournalGeophysical Research Letters
Issue number16
Publication statusPublished - 2007 Aug 28


ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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