A field guide to the permanent sample plots in the reduced-impact logging block 27 at CIFOR Malinau research forest East Kalimantan

Avaliou-se o efeito da exploração de madeira, realizada em 1997, na estrutura e dinâmica de algumas espécies de Sapotaceae em uma Floresta Ombrófila Densa, no município de Moju, Pará (02º12’26”S e 48º48’14”W). De uma área de floresta de 1.050 ha, foram selecionados 200 hapara exploração seletiva de intensidade de 23 m3.ha-1. Nessa área, foram alocadas 22 parcelas permanentes de 0,5 ha, totalizando 11 ha amostrais, onde foram medidas todas as árvores com DAP ≥10 cm, nos anos de 1995 (antes da exploração), 1998 e 2010 (após exploração). Os parâmetros avaliados foram densidade (Da) e área basal (m2.ha-1). No período de 1995 a 2010, Sapotaceae apresentou uma redução significativa de 7,7% na densidade (p = 0,0147) e aumento na dominância em 1,4% (p = 0,7851). Nesse mesmo período, observou-se redução da densidade e dominância para Pouteria laurifolia (Gomes) Radlk. (66,7 e 50,6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 e 29,4%), Micropholis acutangula (Ducke) Eyma (20 e 11%), Manilkara huberi (Ducke) A. Chev. (16,4 e 17,7%) e Manilkara paraensis (Huber) Standl. (12,5 e 31,4%). A espécie com maior valor comercial, M. huberi, não mostrou recuperação nesse parâmetro, porém houve ingresso de três novas espécies na população de Sapotaceae estudada.AbstractEffect of reduced impact logging in some sapotaceae species in the eastern amazon. Effect of logging, held in 1997, on structure and dynamics of some Sapotaceae species were evaluated in a dense tropical rain forest located in the municipality of Moju, Pará (02º 12’ 26” S e 48º 48’ 14” W). Two hundred ha out of 1,050 ha forest area were selectively logged for timber (23 m3ha-1 logging intensity) in 1997.Twenty-two 0.5 ha permanent sample plots (11 ha sample) were established and all trees with dbh ≥ 10 cm were identified and measured for dbh in 1995 (before logging), 1998 and 2010 (after logging). Parameters evaluated were Density (De) and Basal area (G-m2 ha-1). Sapotaceae presented a significant reduction of 7.7% on tree density (p=0.0147), and an dominance increase of 1.4% (p=0.7851). In the same period, decreases in density and basal area were observed to Pouteria laurifolia (Gomes) Radlk. (66.7 and 50.6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 and 29.4%), Micropholis acutangula (Ducke) Eyma (20 and 11%), Manilkara huberi (Ducke) A. Chev. (16.4 and 17.7%) and Manilkara paraensis (Huber) Standl. (12.5 and 31.4%). The main commercial species M. Huberi did not recover its original density. On the other hand, three new species of the family were recorded in the focused period.Keywords: Forest management; Pouteria; Manilkara; Amazonian Forest.

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ANALISIS FINANSIAL PEMANENAN KAYU TEKNIK REDUCED IMPACT LOGGING MELALUI SKEMA REDD+, KALIMANTAN UTARA

Jurnal Pertanian Tropik ◽

10.32734/jpt.v2i1.2872 ◽

2015 ◽

Vol 2 (1) ◽

pp. 13-16

Author(s):

Muhdi ◽

Juang Rata Matangaran

Keyword(s):

Tropical Forest ◽

Carbon Stock ◽

Financial Analysis ◽

Allometric Equations ◽

Purposive Sampling ◽

East Kalimantan ◽

C Stock ◽

Reduced Impact Logging

The research was done at a natural tropical forest of PT Inhutani II, East Kalimantan. The objectivesof the research were to study the carbon (C) stock in the natural tropical forest after conventional andreduced impact logging (RIL) and to get the effectivity of RIL based on carbon stock, financial andenvironmental aspects. The effect of conventional and RIL on the environment and carbon stock in theplots was studied using the data of three plots with each size 100 m x 100 m. The plots are placedbased on purposive sampling at landing, main skid trail, and branch skid trails, respectively. Cstocks are counted by allometric equations and C economics by the economic acceptance of REDD.Economic value of RIL was IDR 1,604,518,900,- ha-1. Based on financial analysis showed that RILwas feasible and profitable at a rate of interest 16 %.

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FOREST DYNAMICS IN THE EASTERN AMAZON WITH SPECIAL REFERENCE TO SAPOTACEAE SPECIES

FLORESTA ◽

10.5380/rf.v45i3.35947 ◽

2015 ◽

Vol 45 (3) ◽

pp. 567 ◽

Cited By ~ 3

Author(s):

Leonardo Pequeno Reis ◽

Pamella Carolline Marques dos Reis ◽

Ademir Roberto Ruschel ◽

José Natalino Macedo Silva ◽

João Olegário Pereira de Carvalho ◽

...

Keyword(s):

Decision Making ◽

Forest Management ◽

Special Reference ◽

Forest Dynamics ◽

Rain Forest ◽

Amazon Forest ◽

Sampling Area ◽

Permanent Sample Plots ◽

Reduced Impact Logging ◽

Observation Period

AbstractSapotaceae species are among the most dominant tree species in the Amazon forest and are high valued timbers. This paper aimed to evaluate the effect of Reduced Impact Logging (RIL) over a dense tropical rain forest with special reference to Sapotaceae species, to generate information helping decision making in forest management. In 1997, out of a 1050 ha forest area located in the municipality of Moju, State of Pará, Brazil, 200 ha were selected to be logged applying a logging intensity of 23 m3 ha-1 and RIL techniques. To monitor forest dynamics, 22 permanent sample plots (11 ha sampling area) were established and all trees with DBH ≥ 10 cm were measured in years 1995, 1998 and 2010. In the whole observation period, mortality and ingrowth of Sapotaceae species were, respectively, 1.5% year-1 and 1.0% year-1. Trees with full overhead light grew 0.39 cm year-1 and those completely shaded grew only 0.16 cm year-1. Mortality higher than ingrowth indicates that the population of Sapotaceae species still need a period longer than 13 years to recover equilibrium after RIL, despite showing increased diametric growth rates.ResumoDinâmica de uma floresta no leste da Amazônia com ênfase às espécies de Sapotaceae. As espécies de Sapotaceae estão entre as mais dominantes na floresta amazônica e possuem alto valor comercial. O trabalho objetivou avaliar o efeito da Exploração de Impacto Reduzido (EIR) sobre uma floresta ombrófila densa com ênfase às espécies de Sapotaceae para gerar informações que possam subsidiar decisões a serem tomadas sobre o manejo de florestas nativas. De uma área florestal de 1.050 ha, situada no município de Moju, PA, foram selecionados 200 ha para EIR com intensidade de 23 m3 ha-1 em 1997. O monitoramento florestal foi feito com 22 parcelas permanentes (11 ha), sendo medidas todas as árvores com DAP ≥ 10 cm, nos anos de 1995, 1998 e 2010. No período total (1995 a 2010) a mortalidade das espécies de Sapotaceae foi de 1,5% ano-1 e o ingresso de 1,0% ano-1. As árvores com copas totalmente expostas à luz tiveram o incremento de 0,39 cm ano-1 e aquelas totalmente cobertas o incremento foi de 0,16 cm ano-1. A mortalidade maior que o ingresso indica que as espécies de Sapotaceae necessitam de um período maior que 13 anos para recuperar o equilíbrio após a EIR, apesar do aumento no crescimento diamétrico.Palavras-chave: Impacto pós-colheita; mortalidade; manejo florestal.

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