EQUATIONS TO ESTIMATE TREE GAPS IN A PRECISION FOREST MANAGEMENT AREA THE AMAZON BASED ON CROWN MORPHOMETRY
Autor: | Evaldo Muñoz Braz, Evandro Orfanó Figueiredo, M. V. N. d' Oliveira, Daniel de Almeida Papa, Philip M. Fearnside |
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Přispěvatelé: | EVANDRO ORFANO FIGUEIREDO, CPAF-Acre, MARCUS VINICIO NEVES D OLIVEIRA, CPAF-Acre, Philip Martin Fearnside, Instituto Nacional de Pesquisas da Amazônia (Inpa), EVALDO MUNOZ BRAZ, CNPF, DANIEL DE ALMEIDA PAPA, CPAF-Acre. |
Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
Canopy 010504 meteorology & atmospheric sciences Manejo forestal Tropical forests Forest profiling 01 natural sciences Análisis estadístico LIDAR Forest cover Análisis de regresión Espacios vacíos en el dosel Acre Exploração madeireira lcsh:Forestry Floresta Estadual do Antimary (AC) Impact area Biometria Lidar Administração florestal Forest management Amazon rainforest Perfilamento florestal Copa de los árboles Raio laser Statistical analysis Linear regression model Manejo Florestal Bujari (AC) Regression analysis Lásers Sena Madureira (AC) Biometry 010603 evolutionary biology Árvores Modelo de regressão linear Canopy gaps Colheita florestal 0105 earth and related environmental sciences Floresta tropical Hydrology Tree crown Morphometry Análise estatística Clareira State forest Morfometría Copa Environmental science Manejo de precisão Amazonia Occidental lcsh:SD1-669.5 Regressão linear Amazônia Ocidental Western Amazon Bosques tropicales |
Zdroj: | Revista Árvore, Vol 41, Iss 3 (2018) Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA Repositório Institucional do INPA Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA Revista Árvore, Volume: 41, Issue: 3, Article number: e410313, Published: 22 FEB 2018 Revista Árvore v.41 n.3 2017 Revista Árvore Universidade Federal de Viçosa (UFV) instacron:SIF |
ISSN: | 1806-9088 |
Popis: | The precision forest management technique still has much to be improved with the incorporation of forest biometric techniques and forest profiling with airborne LIDAR. When planning the cutting of a tree in forest management, the volume to be produced for industry is estimated but not the area impacted by removal of the tree. The objective of the present study was to develop equations for the Amazon rainforest that are able to estimate the impact area of gaps from harvesting individual dominant and co-dominant trees based on the canopy morphology obtained through forest profiling. On two separate occasions profiles were made in an annual forest-production unit in the Antimary State Forest (FEA) in the state of Acre, Brazil. The first was done a few days before the start of logging in 2010 and the second was done after completion of harvest activities in 2011. With field measurements and processing of the cloud of LIDAR points, dendrometric and morphometric variables were obtained for the canopy in order to develop equations for estimating gap areas. After evaluation of the explanatory variables with the highest correlation with gap area, the method used considered all possible models and included 2-4 parameters. The explanatory variables that best represent the impact of clearings are volume of the crown (VCop) and crown-projection area (APC). Ten equations were selected, of which two were chosen for use; these had R2 aj > 75% and Syx 75% e Syx < 23%. O bom ajuste das equações demonstra o potencial do uso do LIDAR visando obter informações para se estimar previamente as clareiras pela extração de árvores de diferentes dimensões. |
Databáze: | OpenAIRE |
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