Metabolic theory and body size constraints on biomass production and decomposition suggest that differences in the intrinsic potential net ecosystem production ( NEP POT ) should be small among contrasting C 3 grasslands and therefore unable to explain the wide range in the annual apparent net ecosystem production ( NEP APP ) reported by previous studies. We estimated NEP POT for nine C 3 grasslands under contrasting climate a...

We present carbon stable isotope, δ 13 C, results from air and organic matter samples collected during 98 individual field campaigns across a network of Carboeuroflux forest sites in 2001 (14 sites) and 2002 (16 sites). Using these data, we tested the hypothesis that δ 13 C values derived from large‐scale atmospheric measurements and models, which are routinely used to partition carbon fluxes between land and ocean, and potent...