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

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

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416403w&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 16, CiteID L16403

Physics

Geophysics

1

Biogeosciences: Agricultural Systems, Biogeosciences: Biogeophysics, Biogeosciences: Nitrogen Cycling, Geochemistry: Stable Isotope Geochemistry (0454, 4870)

Scientific paper

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 δ 15N signatures decreased as successional age increased at both the plant community and species levels. There were also significant decreases in soil δ 15N as succession proceeded. These results provide a clear example that δ 15N 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 δ 15N spatial patterns.

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