Modeling the Long-Term Impacts of Logging on Genetic Diversity and Demography of <i>Hymenaea courbaril</i>

Lacerda, A. E. B. de; Nimmo, Evelyn R.; Sebbenn, Alexandre Magno

doi:10.5849/forsci.10-118

Cited by 22 publications

(17 citation statements)

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“…Studies about the effects of logging on demography of mahogany has been suggested that the species may be sustainable logged in cutting cycles > 100 years (GULLISON et al, 1996). Similar result was observed in the Neotropical tree Hymenaea courbaril in Brazil (LACERDA et al, 2012). This new silvicultural practice may reduce the impacts of harvesting on the genetic diversity, mating system and demography of species populations because a large number of reproductive individuals will be remain in the populations after logging.…”

Section: Implications For Sustainable Forest Managementmentioning

confidence: 54%

Gene flow in an overexploited population of Swietenia macrophylla King (Meliaceae) in the Bolivian Amazon

et al. 2012

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Pollen and seed movement among and within populations connect individuals and populations, and therefore are among the most important evolutionary processes determining the genetic structure of populations. Seven microsatellite loci were used to investigate the realized pollen dispersal and intra-population spatial genetic structure (SGS) in four permanent plots located in an overexploited big-leaf mahogany (Swietenia macrophylla King) population in the Bolivian Amazon. All adult trees found in the plots were mapped, sampled and genotyped. Seedlings were sampled below the canopy of reproductive trees. Private alleles in the sub-population of the adults and the seedlings were observed. The observed heterozygosity was significantly lower and fixation index was significantly higher for the seedlings (Ho=0.697, F=0.068) compared to the adults (Ho=0.761, F=-0.023). In one plot, seed immigration was observed (18%). Realized pollen immigration ranged among the plots from zero to 41% and selfing ranged from zero to 5.8%. We observed an average pollen dispersal distance from 75 to 255 m, with the maximum reaching 576 m. We found a significant SGS up to 150 m, showing that near neighbour individuals are relatives. The observed data on pollen- and seed dispersal provides important information for the sustainable management of the endangered mahogany species.

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Section: Implications For Sustainable Forest Managementmentioning

confidence: 54%

Gene flow in an overexploited population of Swietenia macrophylla King (Meliaceae) in the Bolivian Amazon

et al. 2012

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“…So, it is suggested that, without the knowledge of the MLD and the ideal cycle, management claims are arbitrary. By example, when an analysis considers the forest management as unsustainable, showing extractions that do not permit the full recovery of the timber volume extracted (Sebben et al, 2008;Zimmerman & Kormos, 2012;Lacerda et al, 2013), it is important to confirm that the authors calculate what the remnant structure should have been before the forest intervention. Braz et al (2011) studying Cedrela odorata L. from Amazon Forest showed that different remaining structures of the same species produced different volume recoveries.…”

Section: Discussionmentioning

confidence: 99%

Alternative criteria to achieve sustainable management of Mezilaurus itauba in the Brazilian Amazon

et al. 2018

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The aims of this study were to evaluate the Brazilian law parameters for tropical forest management regarding forest recovery and to propose alternative criteria to achieve sustainability, using Mezilaurus itauba (Meisn.) Taub. ex Mez as case study. The diameter structure was obtained from a 100% forest inventory of a 500 ha forest compartment. The assessment of M. itauba growth, ingrowth and mortality were carried out in a two sample plot of 50 ha located on the compartment, where all commercial species were measured both before and 7 years after logging. First it was evaluated the species structure and its most productive diameter class. The species recovery of timber volume has been simulated for the minimum logging diameter (MLD) of 50, 60, 70 and 80 cm. The largest volume recover was reached for the 60 cm MLD class. We showed that there is a diametric limit to achieve net timber volume production and that different remnant structures produce different increments. Critérios alternativos para alcançar o manejo sustentável de Mezilaurus itauba na Amazônia brasileiraResumo -Os objetivos deste trabalho foram avaliar os parâmetros da legislação brasileira para o manejo de florestas tropicais quanto à recuperação da floresta e propor critérios alternativos para alcançar sua sustentabilidade, utilizando Mezilaurus itauba (Meisn.) Taub. ex Mez como caso de estudo. A estrutura diamétrica foi obtida de inventário 100% em um talhão de 500 ha. Os dados de crescimento, recrutamento e mortalidade de M. itauba foram adquiridos de 2 parcelas de 50 ha instaladas no talhão, em que todas as espécies comerciais foram medidas antes e após 7 anos da exploração. Foram avaliadas previamente a estrutura da espécie e sua classe diamétrica mais produtiva em volume. Posteriormente, foi simulada a recuperação em volume para os diâmetros limite de corte (DLC) de 50, 60, 70 e 80 cm. A maior produção ocorreu com DLC de 60 cm. O trabalho evidenciou que existe um limite diamétrico para a produção líquida de volume de madeira e que distintas estruturas remanescentes produzem incrementos diferentes.

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“…Essa espécie geralmente começa a reproduzir com DAP superior a 49 cm (LACERDA et al, 2013), e nesse caso é provável que muitos indivíduos sejam cortados antes de atingirem a maturidade, não contribuindo geneticamente para as gerações futuras. Com poucos indivíduos reprodutivos remanescentes, espera-se que ocorra uma diminuição significativa na diversidade genética de progênies produzidas nos eventos reprodutivos subsequentes ao manejo, como já detectado em outros estudos (ARRUDA et al, 2015;CARNEIRO et al, 2011;VINSON et al, 2015) A população de Porto Acre foi a que apresentou maior densidade de jatobás, porém menor área basal média (Tabela 2).…”

Section: Resultados E Discussão Estrutura Populacionalunclassified

“…Os poucos trabalhos que buscaram comparar as espécies amazônicas quanto à oferta futura de volume de madeira após a primeira exploração indicaram diferenças significativas entre as espécies, sendo umas mais resilientes do que outras (DAUBER et al, 2005;DEGEN et al 2006;SEBBENN et al, 2008). Dessa forma, estratégias de manejo espécie--específicas passam a ser de extrema relevância, considerando não apenas condições de crescimento, mas também variáveis ecológicas e reprodutivas (AZEVEDO et al, 2007;SEBBENN et al, 2008;LACERDA et al, 2013;VINSON et al, 2015).…”

Section: Introductionunclassified

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Impacto da exploração madeireira na diversidade genética e área basal de jatobá na Amazônia sul-ocidental

Silva¹,

Wadt²,

Mesquita³

et al. 2016

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Modeling the Long-Term Impacts of Logging on Genetic Diversity and Demography of Hymenaea courbaril

Cited by 22 publications

References 0 publications

Gene flow in an overexploited population of Swietenia macrophylla King (Meliaceae) in the Bolivian Amazon

Gene flow in an overexploited population of Swietenia macrophylla King (Meliaceae) in the Bolivian Amazon

Alternative criteria to achieve sustainable management of Mezilaurus itauba in the Brazilian Amazon

Impacto da exploração madeireira na diversidade genética e área basal de jatobá na Amazônia sul-ocidental

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