Long tree-ring chronologies provide evidence of recent tree growth decrease in a Central African tropical forest.

7b , S3 Fig ), while the growth trend in the previous 100 years did not show a significant trend ( Fig. 7b ).

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cylindricum , which is the species with the oldest samples, showed a decreasing trend from 1800 to 2000 in contrast to the CO 2 increase ( Fig. 6a , Fig. 7a , S2 Fig .).

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Trends in atmospheric CO 2 and climate changes vs tree growth The CO 2 concentration showed an increasing trend over the two analyzed centuries while the tree growth of the three species did not present any increasing trend in the same period ( Fig. 6 and S2 – S4 Figs.).

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