Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon

Renato Bezerra da Silva Ribeiro; Leila Sheila Silva Lisboa; Carlos Tadeu dos Santos Dias; Afonso Henrique Moraes Oliveira; Emanuel José Gomes de Araújo; Dárlison Fernandes Carvalho de Andrade; Lucieta Guerreiro Martorano

doi:10.20944/preprints202407.1564.v2

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preprints.org > environmental and earth sciences > environmental science > doi: 10.20944/preprints202407.1564.v2

Preprint Article Version 2 This version is not peer-reviewed

Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon

Renato Bezerra da Silva Ribeiro

^* ,

Leila Sheila Silva Lisboa

Carlos Tadeu dos Santos Dias

Afonso Henrique Moraes Oliveira

Emanuel José Gomes de Araújo

Dárlison Fernandes Carvalho de Andrade

Lucieta Guerreiro Martorano

Version 1 : Received: 18 July 2024 / Approved: 18 July 2024 / Online: 19 July 2024 (11:07:14 CEST)
Version 2 : Received: 8 October 2024 / Approved: 9 October 2024 / Online: 10 October 2024 (06:16:09 CEST)

How to cite: Silva Ribeiro, R. B. D.; Lisboa, L. S. S.; Dias, C. T. D. S.; Oliveira, A. H. M.; Araújo, E. J. G. D.; Andrade, D. F. C. D.; Martorano, L. G. Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon. Preprints 2024, 2024071564. https://doi.org/10.20944/preprints202407.1564.v2 Silva Ribeiro, R. B. D.; Lisboa, L. S. S.; Dias, C. T. D. S.; Oliveira, A. H. M.; Araújo, E. J. G. D.; Andrade, D. F. C. D.; Martorano, L. G. Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon. Preprints 2024, 2024071564. https://doi.org/10.20944/preprints202407.1564.v2

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MDPI and ACS Style

Silva Ribeiro, R. B. D.; Lisboa, L. S. S.; Dias, C. T. D. S.; Oliveira, A. H. M.; Araújo, E. J. G. D.; Andrade, D. F. C. D.; Martorano, L. G. Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon. Preprints 2024, 2024071564. https://doi.org/10.20944/preprints202407.1564.v2

APA Style

Silva Ribeiro, R. B. D., Lisboa, L. S. S., Dias, C. T. D. S., Oliveira, A. H. M., Araújo, E. J. G. D., Andrade, D. F. C. D., & Martorano, L. G. (2024). Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon. Preprints. https://doi.org/10.20944/preprints202407.1564.v2

Chicago/Turabian Style

Silva Ribeiro, R. B. D., Dárlison Fernandes Carvalho de Andrade and Lucieta Guerreiro Martorano. 2024 "Imprecision in Yield Estimates Using Timber Volume in Forest Management Plans in the Amazon" Preprints. https://doi.org/10.20944/preprints202407.1564.v2

Abstract

The evaluation of logging in a forest management area using only the volume variable is not sufficient to assess the effectiveness of the harvest. The objective was to evaluate harvested volume using different logging variables to point out possible divergences between what was planned and what was actually carried out, in order to indicate adjustments to next annual operating plans (AOPs). The database comes from a community forest management area in the Tapajós National Forest, considering three sources: forest inventory, AOP planning and the post-exploration report. The yield considering the number of trees felled and the effective volume were compared with the AOP planning. The volume estimated by the generic equation was compared with the cubed volume and the commercial height variable was evaluated. Of the 6,267 trees selected, 5,090 trees were harvested (3.2 trees ha^-1), indicating a yield of 85% of the estimated volume. Of the 25 commercial species logged, the most representative were: Manilkara huberi, Vochysia maxima, Lecythis lurida, Couratari guianensis and Hymenaea courbaril. It can be concluded that the number of trees, cubed volume and commercial height are post-exploration yield response variables and not just volume, as is currently used in Sustainable Forest Management Plans (SFMPs).

Keywords

Annual Operating Plan; Commercial Height; Community Forest Management; Logging; Tapajós National Forest; Timber estimation

Subject

Environmental and Earth Sciences, Environmental Science

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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