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wood specific gravity; wood density; increment rings; blackwater floodplain forest; igapó; Rio Jaú; Central Amazonia
Abstract:
The Jau National Park is the largest protected forested area in the world. The Vitoria Amazonica Foundation is working towards understanding its ecosystem, to which this paper contributes. Wood density was analysed in 27 common tree species growing in the blackwater floodplains of the Rio Jau, an affluent of the Rio Negro (Amazonia, Brazil). Wood was sampled with an increment borer. Mean wood density of the analysed species ranged from 0.35 to 0.87 g cm-3. The mean of all sampled species was 0.67 g cm-3 (st. dev. 0.13). Lowest density was found for Hevea spruceana with 0.32 g cm-3 and highest for Crudia amazonica with 0.9 g cm-3.
