Data/hora: 17/06/2024 17:30:37

Biblioteca(s): 	Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental.	
Data corrente: 	22/08/2006	
Data da última atualização: 	21/06/2018	
Autoria: 	PHILLIPS, P. D.; AZEVEDO, C. P. de; DEGEN, B.; THOMPSON, I. S.; SILVA, J. N. M.; GARDINGEN, P. R. van.	
Afiliação: 	CELSO PAULO DE AZEVEDO, CPAA; JOSÉ NATALINO MACEDO SILVA, CPATU.	
Título: 	An individual-based spatially explicit simulation model for strategic forest management planning in the eastern Amazon.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	Ecological Modelling, v. 173, n. 4, p. 335-354, 2004.	
Descrição Física: 	il.	
DOI: 	http://dx.doi.org/10.1016/j.ecolmodel.2003.09.023	
Idioma: 	Inglês	
Conteúdo: 	A model to simulate the ecological processes of tree growth, mortality and recruitment, and the processes of forest management, in the terra firme forests of the eastern Amazon is described. It is implemented within the SYMFOR (http://www.symfor.org) framework. It is based on measurements of all trees that have a diameter greater than 5 cm from experimental plots in the Jar?? Cellulose and Tapajós National Forest areas over a 16-year period. Ten species groups are used to describe the natural processes affecting tree behaviour. Growth rates are calculated for each species group using the tree diameter and a competition index. Mortality and recruitment are simulated as stochastic processes. Recruitment probability is based on the predicted growth rate of a hypothetical tree. Options exist to vary the human interaction with the forest reflecting forest management decisions, as for other SYMFOR models. Model evaluation compares the performance of the model with data describing forest recovery for 16 years following logging. The model was applied to simulate current forest management practice in the Brazilian Amazon, with 40 m3 ha?1 of timber extracted with a cutting cycle of 30 years. Results show that yields are sustained for three harvests following the first logging of primary forest, but that the composition of timber moves towards lightwooded species rather than hardwooded. The predicted size of extracted trees decreases and the number of trees extracted increases with successive harvests, leading to a prediction of increased costs and lower profits for the logging company despite constant yields. The standing volume of all trees just before harvest is reduced by 15% over 150 years, with pioneer species becoming increasingly prevalent in the stand. The model, in the SYMFOR framework, can be used to help understand the differences between alternative forest management strategies in the Brazilian Amazon. Such knowledge is required to improve forest management, regulation and certification, and help to conserve the worlds largest remaining tropical forest.	
Palavras-Chave: 	Brasil; Certificação.	
Thesagro: 	Árvore; Competição de Variedade; Floresta Tropical; Manejo.	
Thesaurus Nal: 	Amazonia.	
Categoria do assunto: 	--
K Ciência Florestal e Produtos de Origem Vegetal	
Registro original: 	Embrapa Amazônia Ocidental (CPAA)	
Exemplares: 	CPATU - (38128-1) - UPC - AP - DD -  -  -  - DIS
CPAA - (36877-1) - UPC - AP - DD -  -  -  - DIS