Im 200 300 400

Fig. 3.22 Carbon assimilation rate as affected by sex in male and female trees of box elder (Acer negundo) growing under common garden conditions. Plot of assimilation rate (A) as a function of intercellular CO2 concentration (ci) and the rate of oxygen evolution (right panel) for male (circles) and female (squares). Plants were well watered or droughted for 14 days then measured. Arrows of the A—c curves show c at ambient [CO2] of 353 ppm. (Reproduced with permission from Dawson et al., 2004.)

methods are employed. Only by examining local differences in biodiversity and progressing from the particular to the general can biologically based action plans for conservation and restoration be accurately formulated which reflect the nature of the species under consideration.

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