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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
10/10/2017 |
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Data da última atualização: |
22/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BERTWELL, T. D.; KAINER, K. A.; CROPPER JUNIOR, W. P.; STAUDHAMMER, C. L.; WADT, L. H. de O. |
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Afiliação: |
Todd D. Bertwell, University of Florida; Karen A. Kainer, University of Florida; Wendell P. Cropper Jr, University of Florida; Christina L. Staudhammer, University of Alabama; LUCIA HELENA DE OLIVEIRA WADT, CPAF-Rondonia. |
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Título: |
Are Brazil nut populations threatened by fruit harvest? |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Biotropica, v. 50, n. 1, p. 50-59, 2018. |
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DOI: |
10.1111/btp.12505 |
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Idioma: |
Inglês |
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Conteúdo: |
Harvest of Brazil nuts from the large, iconic tree Bertholletia excelsa generates substantial income for smallholders, providing a strong incentive to conserve the mature forests where it grows. Although much previous work has focused on the impact of nut harvest on new seedling recruits into B. excelsa populations, the connection between harvest rates and long-term population stability is still unclear. Moreover, there is additional uncertainty for Brazil nut management in terms of population response to climate change and other anthropogenic influences. We drew on 14 years of research in two sites in Acre, Brazil with different B. excelsa nut harvest intensities (39% and 81%), to produce stochastic and deterministic matrix population models which incorporated parameter uncertainty in vital rates. Adult abundance was projected to remain close to the current observed abundance or higher through the next 50 years. Elasticity analyses revealed that the asymptotic population growth rate (λ) was most sensitive to stasis vital rates in sapling, juvenile, and adult stages. Deterministic transition matrices calculated using diameter growth rates dependent on rainfall yielded average λ values around 1.0 under extreme high, extreme low, and average annual rainfall. While sustained high rates of Brazil nut harvest and climate change could potentially negatively impact B. excelsa populations, changes in human use of the forested landscape are more immediate concern. To reduce the risk of population decline, smallholders and managers of B. excelsa rich forests should focus on conservation of pre-mature and mature individuals. MenosHarvest of Brazil nuts from the large, iconic tree Bertholletia excelsa generates substantial income for smallholders, providing a strong incentive to conserve the mature forests where it grows. Although much previous work has focused on the impact of nut harvest on new seedling recruits into B. excelsa populations, the connection between harvest rates and long-term population stability is still unclear. Moreover, there is additional uncertainty for Brazil nut management in terms of population response to climate change and other anthropogenic influences. We drew on 14 years of research in two sites in Acre, Brazil with different B. excelsa nut harvest intensities (39% and 81%), to produce stochastic and deterministic matrix population models which incorporated parameter uncertainty in vital rates. Adult abundance was projected to remain close to the current observed abundance or higher through the next 50 years. Elasticity analyses revealed that the asymptotic population growth rate (λ) was most sensitive to stasis vital rates in sapling, juvenile, and adult stages. Deterministic transition matrices calculated using diameter growth rates dependent on rainfall yielded average λ values around 1.0 under extreme high, extreme low, and average annual rainfall. While sustained high rates of Brazil nut harvest and climate change could potentially negatively impact B. excelsa populations, changes in human use of the forested landscape are more immediate concern. To reduce... Mostrar Tudo |
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Palavras-Chave: |
Colheita sustentável; Matrix population model; Modelo de população matricial; Rainfall; Sustainable harvest; Tropical forest. |
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Thesagro: |
Bertholletia Excelsa; Floresta Tropical. |
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Thesaurus Nal: |
demography. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/171489/1/Bertwell-et-al-2018-Biotropica.pdf
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Marc: |
LEADER 02488naa a2200289 a 4500
001 2077079
005 2018-01-22
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/btp.12505$2DOI
100 1 $aBERTWELL, T. D.
245 $aAre Brazil nut populations threatened by fruit harvest?$h[electronic resource]
260 $c2018
520 $aHarvest of Brazil nuts from the large, iconic tree Bertholletia excelsa generates substantial income for smallholders, providing a strong incentive to conserve the mature forests where it grows. Although much previous work has focused on the impact of nut harvest on new seedling recruits into B. excelsa populations, the connection between harvest rates and long-term population stability is still unclear. Moreover, there is additional uncertainty for Brazil nut management in terms of population response to climate change and other anthropogenic influences. We drew on 14 years of research in two sites in Acre, Brazil with different B. excelsa nut harvest intensities (39% and 81%), to produce stochastic and deterministic matrix population models which incorporated parameter uncertainty in vital rates. Adult abundance was projected to remain close to the current observed abundance or higher through the next 50 years. Elasticity analyses revealed that the asymptotic population growth rate (λ) was most sensitive to stasis vital rates in sapling, juvenile, and adult stages. Deterministic transition matrices calculated using diameter growth rates dependent on rainfall yielded average λ values around 1.0 under extreme high, extreme low, and average annual rainfall. While sustained high rates of Brazil nut harvest and climate change could potentially negatively impact B. excelsa populations, changes in human use of the forested landscape are more immediate concern. To reduce the risk of population decline, smallholders and managers of B. excelsa rich forests should focus on conservation of pre-mature and mature individuals.
650 $ademography
650 $aBertholletia Excelsa
650 $aFloresta Tropical
653 $aColheita sustentável
653 $aMatrix population model
653 $aModelo de população matricial
653 $aRainfall
653 $aSustainable harvest
653 $aTropical forest
700 1 $aKAINER, K. A.
700 1 $aCROPPER JUNIOR, W. P.
700 1 $aSTAUDHAMMER, C. L.
700 1 $aWADT, L. H. de O.
773 $tBiotropica$gv. 50, n. 1, p. 50-59, 2018.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Territorial. |
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Data corrente: |
10/03/2009 |
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Data da última atualização: |
10/05/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FERREIRA, J. N.; BRIENZA JUNIOR, S.; BATISTELLA, M.; ABREU, L. S. de; CELESTINO FILHO, P.; MATTOS, L. M. de; XAUD, M. R.; SILVA, M. R. da; BUSCHINELLI, C. C. de A.; PINTO, E. de P.; MOUTINHO, P.; STACHETTI, G. |
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Afiliação: |
JOICE NUNES FERREIRA, CPATU; SILVIO BRIENZA JUNIOR, CPATU; MATEUS BATISTELLA, CNPM; LUCIMAR SANTIAGO DE ABREU, CNPMA; PEDRO CELESTINO FILHO, CPATU; LUCIANO MANSOR DE MATTOS, CNPMA; MARISTELA RAMALHO XAUD, CPAF-RR; MARCOS R. DA SILVA, IPAM; CLAUDIO CESAR DE A BUSCHINELLI, CNPMA; ERIKA DE PAULA PINTO, IPAM; PAULO MOUTINHO, IPAM; GERALDO STACHETTI, IPAM. |
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Título: |
Agroambiente network: ecosystem services in agricultural landscapes in the Brazilian Amazon. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: ACES: A CONFERENCE ON ECOSYSTEM SERVICES, 2 USING SCIENCE FOR DECISION MAKING IN DYNAMIC SYSTEMS, Naples, FL. Abstract book... Gainesville: University of Florida, 2008. |
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Páginas: |
p. 46. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Family farms are by far the most numerous component of the agricultural sector in the Brazilian Amazon. However socially vital for the development of the region, these small landholdings? agricultural and cattle ranching activities frequently overdraw and degrade natural resources, threatening important ecosystem services. Predominant agricultural practices have been marked by shifting cultivation, with intense use of fire and low productivity, causing high rate of destruction of natural forests. These current production patterns have not been able to alleviate poverty in many local communities, calling for changes in land use planning and agricultural management strategies toward more sustainable practices. Agroambiente is a research network from Embrapa and collaborators committed to investigate alternative agricultural practices for the maintenance of ecosystems services in the Brazilian Amazon. The network was firstly created to offer scientific support to a Government Program for ecosystem services compensation to family farmers (Proambiente Program), but has been expanding its scope to integrate social and environmental scientists focusing their studies mainly on: factors influencing provision of environmental services; methods for assessing ecosystem health status; management practices with lower impact on the environment; land use changes and market-based mechanisms for poverty alleviation through ecosystem services. Current research activities and their respective methodologies are: 1) Links between social perspectives and agricultural management decisions, carried out by interviews with land owners; 2) Search and validation of innovative production systems applied by farmers assessing inputs and productivity rates in different management conditions; 3) Construction of indices for assessment of ecosystem health in rural establishments through the development of an evaluation system (Ecocert- Proambiente); 4) Management alternatives for fire risk and accidental burnings abatement; 5) Evaluation of land use/land cover dynamics based on Landsat TM images and land use histories by interviews with the farmers; 6) Evaluation of carbon sequestration potential by estimating carbon stocks in different compartments of secondary forests; and 6) Appraisal of available market-based mechanisms for carbon schemes. Some rural communities have already been involved in sustainable agriculture practices such as agroforestry systems and fair trade (e.g. south western Brazilian Amazon). Production systems adopting no-till and no-fire may have initially lower productivity than traditional systems, but some viable management alternatives have been found. The Ecocert-Proambiente system was developed and validated with 62 indicators that covered social, economic, environmental and property management aspects. Avoided deforestation and maintenance of secondary forests were more feasible alternatives in terms of cost-benefit than the CDM negotiations from the establishment of agroforestry systems. Considering this scenario, estimatives in secondary forests of Pará state indicated aboveground biomass varying from 22 to 247 Mg ha-1. Altogether, these results are important to guide public policies in Brazil towards environmental conservation and social benefits in the Amazon. MenosFamily farms are by far the most numerous component of the agricultural sector in the Brazilian Amazon. However socially vital for the development of the region, these small landholdings? agricultural and cattle ranching activities frequently overdraw and degrade natural resources, threatening important ecosystem services. Predominant agricultural practices have been marked by shifting cultivation, with intense use of fire and low productivity, causing high rate of destruction of natural forests. These current production patterns have not been able to alleviate poverty in many local communities, calling for changes in land use planning and agricultural management strategies toward more sustainable practices. Agroambiente is a research network from Embrapa and collaborators committed to investigate alternative agricultural practices for the maintenance of ecosystems services in the Brazilian Amazon. The network was firstly created to offer scientific support to a Government Program for ecosystem services compensation to family farmers (Proambiente Program), but has been expanding its scope to integrate social and environmental scientists focusing their studies mainly on: factors influencing provision of environmental services; methods for assessing ecosystem health status; management practices with lower impact on the environment; land use changes and market-based mechanisms for poverty alleviation through ecosystem services. Current research activities and their respective m... Mostrar Tudo |
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Palavras-Chave: |
Agroambiente; Sistemas dinâmicos. |
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Thesagro: |
Agricultura; Tomada de Decisão. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/107275/1/2317.pdf
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Marc: |
LEADER 04342nam a2200313 a 4500
001 2067073
005 2024-05-10
008 2008 bl uuuu u00u1 u #d
100 1 $aFERREIRA, J. N.
245 $aAgroambiente network$becosystem services in agricultural landscapes in the Brazilian Amazon.$h[electronic resource]
260 $aIn: ACES: A CONFERENCE ON ECOSYSTEM SERVICES, 2 USING SCIENCE FOR DECISION MAKING IN DYNAMIC SYSTEMS, Naples, FL. Abstract book... Gainesville: University of Florida$c2008
300 $ap. 46.
520 $aFamily farms are by far the most numerous component of the agricultural sector in the Brazilian Amazon. However socially vital for the development of the region, these small landholdings? agricultural and cattle ranching activities frequently overdraw and degrade natural resources, threatening important ecosystem services. Predominant agricultural practices have been marked by shifting cultivation, with intense use of fire and low productivity, causing high rate of destruction of natural forests. These current production patterns have not been able to alleviate poverty in many local communities, calling for changes in land use planning and agricultural management strategies toward more sustainable practices. Agroambiente is a research network from Embrapa and collaborators committed to investigate alternative agricultural practices for the maintenance of ecosystems services in the Brazilian Amazon. The network was firstly created to offer scientific support to a Government Program for ecosystem services compensation to family farmers (Proambiente Program), but has been expanding its scope to integrate social and environmental scientists focusing their studies mainly on: factors influencing provision of environmental services; methods for assessing ecosystem health status; management practices with lower impact on the environment; land use changes and market-based mechanisms for poverty alleviation through ecosystem services. Current research activities and their respective methodologies are: 1) Links between social perspectives and agricultural management decisions, carried out by interviews with land owners; 2) Search and validation of innovative production systems applied by farmers assessing inputs and productivity rates in different management conditions; 3) Construction of indices for assessment of ecosystem health in rural establishments through the development of an evaluation system (Ecocert- Proambiente); 4) Management alternatives for fire risk and accidental burnings abatement; 5) Evaluation of land use/land cover dynamics based on Landsat TM images and land use histories by interviews with the farmers; 6) Evaluation of carbon sequestration potential by estimating carbon stocks in different compartments of secondary forests; and 6) Appraisal of available market-based mechanisms for carbon schemes. Some rural communities have already been involved in sustainable agriculture practices such as agroforestry systems and fair trade (e.g. south western Brazilian Amazon). Production systems adopting no-till and no-fire may have initially lower productivity than traditional systems, but some viable management alternatives have been found. The Ecocert-Proambiente system was developed and validated with 62 indicators that covered social, economic, environmental and property management aspects. Avoided deforestation and maintenance of secondary forests were more feasible alternatives in terms of cost-benefit than the CDM negotiations from the establishment of agroforestry systems. Considering this scenario, estimatives in secondary forests of Pará state indicated aboveground biomass varying from 22 to 247 Mg ha-1. Altogether, these results are important to guide public policies in Brazil towards environmental conservation and social benefits in the Amazon.
650 $aAmazonia
650 $aAgricultura
650 $aTomada de Decisão
653 $aAgroambiente
653 $aSistemas dinâmicos
700 1 $aBRIENZA JUNIOR, S.
700 1 $aBATISTELLA, M.
700 1 $aABREU, L. S. de
700 1 $aCELESTINO FILHO, P.
700 1 $aMATTOS, L. M. de
700 1 $aXAUD, M. R.
700 1 $aSILVA, M. R. da
700 1 $aBUSCHINELLI, C. C. de A.
700 1 $aPINTO, E. de P.
700 1 $aMOUTINHO, P.
700 1 $aSTACHETTI, G.
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Embrapa Amazônia Oriental (CPATU) |
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