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Leaf Litter Dynamics and Nitrous Oxide Emission in a Mediterranean Riparian Forest

Implications for Soil Nitrogen Dynamics

S. Bernal*, A. Butturini, E. Nin, F. Sabater and S. Sabater

Departamento Ecología, Universidad de Barcelona, Avd. Diagonal 645, 08028 Barcelona, Spain



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  		Fig. 1. Temporal dynamics of (a) daily precipitation (mm), (b) air temperature (°C), and (c) ground water table (cm) in the Fuirosos riparian area during the study period (Butturini et al., 2002). Data unavailable is indicated by NA.

 


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  		Fig. 2. Ammonia (dark circles) and nitrate (open triangles) concentrations (mg L-1) in (a) rain and (b) surface overland flow.

 


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  		Fig. 3. Daily rate (average and standard deviations) of leaf litter input via direct fall (top) and output via lateral transport (bottom) in Fuirosos during 1998 and 1999. Black circles, planetree; open circles, alder.

 


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  		Fig. 4. Nitrogen and carbon dynamics of leaf litter during the first year of decomposition for (a) planetree and (b) alder. For each nutrient, solid lines indicate the percentage of the initial content remaining at various intervals. Open triangles for nitrogen. Dark circles for carbon. Dashed line + open circles indicates weight loss. The solid line is the regression line for the exponential decay (for planetree: r = 0.94, df = 4, p < 0.01; for alder: r = 0.97, df = 4, p < 0.01).

 




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