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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Combining Eucalyptus wood production with the recovery of native tree diversity in mixed plantings: Implications for water use and availability

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Autor(es):
Amazonas, Nino Tavares [1] ; Forrester, David I. [2] ; Oliveira, Rafael Silva [3] ; Brancalion, Pedro H. S. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Ciencias Florestais, Lab Silvicultura Trop, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[2] Swiss Fed Inst Forest Snow & Landscape Res WSL, Birmensdorf - Switzerland
[3] Univ Estadual Campinas, Inst Biol, Dept Plant Biol, Caixa Postal 6109, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: FOREST ECOLOGY AND MANAGEMENT; v. 418, n. SI, p. 34-40, JUN 1 2018.
Citações Web of Science: 2
Resumo

Mixed forest plantations now emerge as an alternative to traditional plantations in the tropics and represent ecological gains associated with production, wood quality and nutrient cycling. Mixed plantations with higher diversity may also be advantageous concerning their use of soil water. To shed light onto water-related issues of mixing Eucalyptus and a high diversity of tropical native trees, we explored the following questions: What is the impact of high diversity mixed plantations of Eucalyptus intercropped with native trees on soil water? How does the mixture affect the physiology of water use in native trees? Firstly, we tested the hypothesis that stands of Eucalyptus mixed with a high diversity of native trees consume less water compared to Eucalyptus monocultures, by measuring the temporal dynamics of soil water. Secondly, we tested how mixing with Eucalyptus affects the hydraulic performance of fast- and slow-growing native species in these forestry systems. This is the first time a large experiment has been implemented to compare the effects of monospecific Eucalyptus plantations, native species mixtures and mixed plantations of Eucalyptus and native species on soil water dynamics under controlled conditions in terms of site, age, soil type, topography and climate. We found that high diversity mixed plantations of Eucalyptus and native trees use less soil water, than Eucalyptus monocultures. However, the soil under the mixtures was drier than in native species stands. The mixing with Eucalyptus affected the hydraulic performance of native species by decreasing the leaf water potential and stomata] conductance of the fast-growing species, suggesting that fast-growing species performance may be especially constrained by competition for water from Eucalyptus. These findings have important implications for forest management and ecological restoration in the tropics. They will help to further develop silvicultural options to adapt to climate change and improve plantation forestry by using mixed plantations for production purposes or rehabilitation of degraded lands. (AU)

Processo FAPESP: 13/50718-5 - Restauração ecológica de florestas ciliares, de florestas nativas de produção econômica e de fragmentos florestais degradados (em APP e RL), com base na ecologia de restauração de ecossistemas de referência, visando testar cientificamente os preceitos do Novo Código Florestal Brasileiro
Beneficiário:Ricardo Ribeiro Rodrigues
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 14/02070-9 - Desafios e oportunidades do uso de eucalipto como espécie pioneira comercial na restauração florestal
Beneficiário:Nino Tavares Amazonas
Linha de fomento: Bolsas no Brasil - Doutorado