Rainforest fragmentation and the demography of the economically important palm Oenocarpus bacaba in central Amazonia

Brum, Heloísa D., Nascimento, Henrique E.M., Laurance, William F., Andrade, Ana C.S., Laurance, Susan G., and Luizão, Regina C.C. (2008) Rainforest fragmentation and the demography of the economically important palm Oenocarpus bacaba in central Amazonia. Plant Ecology, 199 (2). pp. 209-215.

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Abstract

We summarize a long-term study of the effects of edge creation on establishment of the economically important arboreal palm Oenocarpus bacaba in an experimentally fragmented landscape in central Amazonia. Recruitment and mortality of large individuals (≥10 cm diameter-at-breast-height) were recorded within 21 1-ha plots in fragmented and intact forests for periods of up to 22 years. In addition, 12 small (0.7 × 14 m) sub-plots within each 1-ha plot were used to enumerate the abundance of seedlings and saplings (5–400 cm tall). On average, the recruitment of large trees was over two times faster near forest edges, leading to a sharp (90%) increase in the mean population density of large individuals near forest edges, whereas the density of larger trees remained constant in the forest interior. Overall seedling and sapling density was significantly lower in edge than interior plots, but edge plots had a much higher proportion of larger (>100 cm tall) saplings. Our findings demonstrate that forest edges can have complex effects on tree demography and that one must consider all tree life stages in order to effectively assess their effects on plant populations.

Item ID: 27568
Item Type: Article (Research - C1)
ISSN: 1573-5052
Keywords: Arecaceae, edge effects, population dynamics, tree seedlings
Funders: NASA/LBA Program, Programa Piloto para Proteção das Florestas Tropicais (PPG-7), A. W. Mellon Foundation, Conservation, Food, and Health Foundation, World Wildlife Fund-U.S., MacArthur Foundation, National Institute for Amazonian Research (INPA), Fundac¸ão de Amaparo à Pesquisa do Amazonas (FAPEAM), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Smithsonian Institution (SI)
Date Deposited: 07 Jun 2013 09:19
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060208 Terrestrial Ecology @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales @ 100%
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