LEAF NUTRIENTS IN ATLANTIC FOREST TREE SPECIES: FRAGMENT SIZE EFFECT

• Autor(a) principal: Silva, Ana Paula da
• Data de Publicação: 2015
• Outros Autores: Villela, Dora Maria
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/18449
• topic: Cupania oblongifolia; forest fragmentation; Guarea guidonea; leaf nutrients.; ciclagem de nutrientes; Cupania oblongifolia; Floresta Tropical; fragmentação florestal

http://dx.doi.org/10.5902/1980509818449The study was made in Atlantic forest fragments in the lowland region of the protected area of São João riverbasin, Rio de Janeiro state, Brazil. The aim of the study was to test the hypothesis that fragment size altersmacro-nutrients concentrations in leaves of the main tree species (<i>Guarea guidonea</i> e<i> Cupania oblongifolia</i>)in the area. Adult leaves of <i>Guarea</i> e<i> Cupania</i> were sampled in three small (23- 33 ha), three medium(130 - 155 ha) and three large (500 - 2300 ha) fragments. Carbon, N, Ca, Mg and K were determined.The results showed that, in general, the reduction of the fragment size did not affect the nutritional statusof the species studied. Nevertheless, the higher Mg concentrations in<i> Cupania oblongifolia </i>leaves in thesmall fragments (5.0±0.8 mg/g) compared with the medium (4.0±0.3 mg/g) and large (3.5±0.7 mg/g) onesindicated an effect of the reduction of the fragment area over this element.