Projecoes da distribuicao diamétrica de uma floresta tropical úmida de terra firme pela cadeia de Markov
A stochastic model for projection the future diameter distribution, of the number of surviving trees and the number of dead trees in each class was developed with diameter data, collected from trees of DBH 25 cm in three permanent plots of 4 ha of undisturbed forest in 1980, 1985 and 1990. A projection to 1990 was done based on first and second measurement. For the three plots, the Chi-Square test showed that there was not significant difference between the projected frequencies and observations for mortality and survival in the classes, and the difference in the diameter distribution was significant in the three plots at the 5 percent level of significance. Based on the data collected in the three sample periods, projections of the forest from the present to the years 1995 and 2000 were made using transition periods of 5 and 10 years. To avoid underestimating the projected frequencies for the smaller classes, a correction was done by simulating the recruitment of trees in the future period. The data were collected in trial plots of the "Ecological Management and Exploration of the Tropical Rainforest Project", approximately 90 km north of Manaus, between km 21 and km 23 on the left side of ZF-2, a secondary road of the Agricultural District of (Administration of the Free Zone of Manaus).
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
Sao Paulo (Brasil)
1993
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| Subjects: | DIAMETRO, MODELOS MATEMATICOS, DINAMICA DE LA POBLACION, MORTALIDAD, BOSQUE TROPICAL HUMEDO, BRASIL, |
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