Although the ORWRP bottomland did not show conclusive changes in pre- and post-restoration productivity, our results indicate that surface-water flooding had an important influence on ANPP in 2004.
In the case of the ORWRP bottomland, topographic variability was provided by a series of swales and ridges in the south section, but in the north section it was also provided by sloughed spoil from the remnant levee.
At the ORWRP bottomland, the highest topographic variability (and highest ANPP) occurred at a plot with an elevation range of approximately 1.0 m, while the lowest variability (and lowest ANPP) occurred in a plot with an elevation range of only 0.1 m.
At two other unrestricted bottomland forests upriver from the ORWRP site (both within 12 km), forest ANPP was estimated at 1283 and 1297 g [m.sup.-2] [yr.sup-1] (Cochran 2001).
Tree ring and basal area increment data from canopy trees in the ORWRP bottomland (particularly A.