Variation in wood density across South American tropical forests Tekijä Sullivan, MJP, Phillips, OL, Galbraith, D, Almeida, E, de Oliveira, EA, Almeida, J, Dávila, EÁ, Alves, LF, Andrade, A, Aragão, L, Araujo-Murakami, A, Arets, E, Arroyo, L, Cruz, OAM, Baccaro, F, Baker, TR, Banki, O, Baraloto, C, Barlow, J, Barroso, J, Berenguer, E, Blanc, L, Blundo, C, Bonal, D, Huasco, WH, Malhi, Y