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Ward, Sheila; Boshier, David; Grogan, James

doi:10.1016/j.foreco.2007.09.047

Cited by 14 publications

(9 citation statements)

References 26 publications

(31 reference statements)

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“…This new particle formation (NPF) can further contribute to direct and indirect radiative forcing by forming cloud condensation nuclei (CCN) (Andreae and Crutzen, 1997). The major biogenic source of DMS in the atmosphere is marine phytoplankton (Stefels, 2000;Charlson et al, 1987;Lovelock et al, 1972;Watts, 2000). However, a recent study from the Amazon rainforest reported high DMS mixing ratios above the forest and concluded that there is a net ecosystem source for DMS (Jardine et al, 2015).…”

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Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: discovery of a missing dimethyl sulfide source to the atmospheric environment

et al. 2020

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Abstract. Biogenic volatile organic compounds exert a strong influence on regional air quality and climate through their roles in the chemical formation of ozone and fine-mode aerosol. Dimethyl sulfide (DMS), in particular, can also impact cloud formation and the radiative budget as it produces sulfate aerosols upon atmospheric oxidation. Recent studies have reported DMS emissions from terrestrial sources; however, their magnitudes have been too low to account for the observed ecosystem-scale DMS emission fluxes. Big-leaf mahogany (Swietenia macrophylla King) is an agroforestry and natural forest tree known for its high-quality timber and listed under the Convention on International Trade in Endangered Species (CITES). It is widely grown in the American and Asian environments (>2.4 million km2 collectively). Here, we investigated emissions of monoterpenes, isoprene and DMS as well as seasonal carbon assimilation from four big-leaf mahogany trees in their natural outdoor environment using a dynamic branch cuvette system, high-sensitivity proton transfer reaction mass spectrometer and cavity ring-down spectrometer. The emissions were characterized in terms of environmental response functions such as temperature, radiation and physiological growth phases including leaf area over the course of four seasons (summer, monsoon, post-monsoon, winter) in 2018–2019. We discovered remarkably high emissions of DMS (average in post-monsoon: ∼19 ng g−1 leaf dry weight h−1) relative to previous known tree DMS emissions, high monoterpenes (average in monsoon: ∼15 µg g−1 leaf dry weight h−1, which is comparable to oak trees) and low emissions of isoprene. Distinct linear relationships existed in the emissions of all three BVOCs with higher emissions during the reproductive phase (monsoon and post-monsoon seasons) and lower emissions in the vegetative phase (summer and winter seasons) for the same amount of cumulative assimilated carbon. Temperature and PAR dependency of the BVOC emissions enabled formulation of a new parameterization for use in global BVOC emission models. Using the measured seasonal emission fluxes, we provide the first estimates for the global emissions from mahogany trees which amount to circa 210–320 Gg yr−1 for monoterpenes, 370–550 Mg yr−1 for DMS and 1700–2600 Mg yr−1 for isoprene. Finally, through the results obtained in this study, we have been able to discover and identify mahogany as one of the missing natural sources of ambient DMS over the Amazon rainforest as well. These new emission findings, indication of seasonal patterns and estimates will be useful for initiating new studies to further improve the global BVOC terrestrial budget.

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Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: discovery of a missing dimethyl sulfide source to the atmospheric environment

et al. 2020

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“…Assim, o termo mahogany passou a designar, além do gênero Swetenia, as madeiras africanas do gênero Khaya (Lamb, 1963). Atualmente, a nomenclatura mogno é empregada apenas para madeiras e árvores de florestas tropicais americanas e africanas dos gêneros Khaya e Swietenia (Lamb, 1963;Ward et al, 2008).…”

Section: A Origem Da Nomenclatura Mognounclassified

“…A FAO (2001) reconheceu que a família Meliaceae pode ser chamada de "família dos mognos" e distinguiu os principais gêneros conforme a região (África e América Latina). Ward et al (2008) (Lamprecht, 1990;Falesi & Baena, 1999;FAO, 2001;Opuni-Frimpong et al, 2008b;Pinheiro et al, 2011). Segundo Fremlin (2011), existem cinco espécies de mogno africano, denominadas: K. senegalensis, K. anthotheca, K. grandifoliola, K. ivorensis e K. madagascarensis.…”

Section: A Origem Da Nomenclatura Mognounclassified

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O Cultivo do Mogno Africano (Khaya spp.) e o Crescimento da Atividade no Brasil

2017

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RESUMOO setor florestal brasileiro está em plena expansão e com um aumento gradativo de investidores florestais optando pelo cultivo de espécies de madeira nobre. O mogno africano (Khaya spp.) é uma espécie que vêm se destacando na preferência dos empresários como opção no investimento florestal. Porém, estudos e pesquisas sobre a espécie, principalmente no Brasil, são escassos. Assim, a presente revisão procurou reunir diversas fontes de publicação, nacionais e internacionais, abordando aspectos históricos do mogno, buscando aclarar as características da espécie e a experiência de outros países no manejo dessa cultura.Palavras-chave: mogno africano (Khaya spp.), plantios florestais, manejo florestal.African Mahogany (Khaya spp.) Cultivation and the Increase of the Activity in Brazil ABSTRACTThe Brazilian forest sector is fast growing with a gradual increase of forest investors choosing valuable hardwood species for tree crops. African mahogany (Khaya spp.) is a species that has been preferred by many entrepreneurs as a forestry investment. However, there are few studies and research on the species, especially in Brazil. Therefore, this review aimed to bring together diverse sources of national and international publications, discussing the history of the mahogany and characteristics of the species as well as the experience of other countries on the management of this crop.

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“…O interesse pelo cultivo de mogno africano em regiões mais frias do que as ideais para o desenvolvimento da cultura, como a região Central do Paraná, é justificado pela qualidade da madeira para uso em movelaria, faqueado, construção naval e em sofisticadas construções interiores (Ward et al, 2008;Ribeiro et al, 2017). Além disso, a madeira apresenta características tecnológicas atrativas, como facilidade no corte e grande potencial para exportação, pelo interesse do mercado europeu (Lamprecht, 1990).…”

Section: Introductionunclassified

Viabilidade econômica da produção de Khaya ivorensis em pequena propriedade no Paraná

et al. 2018

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O mogno africano (Khaya ivorensis) é uma espécie arbórea destinada à produção de madeira nobre. Apresenta elevado valor de mercado e boa adaptação edafoclimática à maior parte do território brasileiro. O objetivo do presente trabalho foi analisar a viabilidade econômica de plantio de mogno africano para produção de madeira nobre. Foi elaborado fluxo de caixa para um período de 20 anos. Os indicadores de viabilidade econômica calculados foram: valor presente líquido (VPL); taxa interna de retorno (TIR); payback; índice de rentabilidade e análise de sensibilidade, levando em consideração a variação de 60% para mais e para menos nos valores de investimento, receita e juros. O VPL calculado foi de R$ 11.296,72; a TIR 16%; o payback 19,92 anos; e o índice de rentabilidade foi de R$ 2,82 para cada R$ 1,00 investido. Na análise de sensibilidade, foi observado que apenas aumento acima de 15% nos juros, ou queda maior que 25% no valor da madeira tornaria o VPL negativo. Portanto, plantio de mogno africano é viável e apresenta baixa sensibilidade às variações do mercado.

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Untitled

Cited by 14 publications

References 26 publications

Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: discovery of a missing dimethyl sulfide source to the atmospheric environment

Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: discovery of a missing dimethyl sulfide source to the atmospheric environment

O Cultivo do Mogno Africano (Khaya spp.) e o Crescimento da Atividade no Brasil

Viabilidade econômica da produção de Khaya ivorensis em pequena propriedade no Paraná

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