Abstract: Based on forest resource inventory data and long-term observation data from forest ecological stations in Heilongjiang Province, eco-product production capacity of forest (forest ecosystem services) at city/region scale in Heilongjiang Province was assessed with forest ecological function correction coefficient. Accordingly, the spatial distribution pattern of forest ecosystem services and the influence of different stand structures on forest ecosystem services were discussed. The results showed that the top three cities/regions in terms of forest ecosystem services were Daxinganling region, Heihe City, Mudanjiang City in Heilongjiang Province. The water conservation amount of forest ecosystems was equivalent to 72.88% of the surface water amount in Heilongjiang Province, and 10.25% of water conservation amount of forest ecosystems in China, 6 times of that in Liaoning Province, and 4 times of that in Jilin Province during 2004 to 2008. The amount of carbon fixed by forest ecosystems in Heilongjiang Province was equivalent to 67.61% of the industrial carbon emission amount in Heilongjiang Province. Over the same period, this ratio was 9.97%, 4.94% and 14.70% for whole China, Liaoning Province and Jilin Province, respectively.

Key words: cavitation resistance, hydraulic conductance, diffuse-porous wood, ring-porous wood, tradeoff.