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 | Acesso ao texto completo restrito à biblioteca da Embrapa Acre. Para informações adicionais entre em contato com cpafac.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
14/11/2014 |
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Data da última atualização: |
01/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDERSEN, H. E.; REUTEBUCH, S. E.; McGAUGHEY, R. J.; OLIVEIRA, M. V. N. d'.; KELLER, M. |
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Afiliação: |
Hans-Erik Andersen, USDA Forest Service; Stephen E. Reutebuch, USDA Forest Service; Robert J.McGaughey, USDA Forest Service; MARCUS VINICIO NEVES D OLIVEIRA, CPAF-AC; Michael Keller, USDA Forest Service. |
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Título: |
Monitoring selective logging in western Amazonia with repeat lidar flights. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Remote Sensing of Environment, v. 151, p. 157-165, Aug. 2014. |
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DOI: |
10.1016/j.rse.2013.08.049 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to test the use of repeat flight, airborne laser scanning data (lidar) for estimating changes associatedwith low-impact selective logging (approx. 10-15 m3 ha-1 = 5-7% of total standing volume harvested) in natural tropical forests in the Western Brazilian Amazon. Specifically, we investigated change in area impacted by selective logging, change in tall canopy (30 m+) area, change in lidar canopy structuremetrics, and change in above ground biomass (AGB) using a model-based statistical framework. Ground plot measurements were only available from the time of the 2010 lidar acquisition. A simple differencing of the 2010 and 2011 lidar canopy height models identified areas where canopy over 30 m tall had been removed. Area of tall canopy dropped from 22.8% in 2010 to 18.7% in 2011, a reduction of 4.1%. Using a relative density model (RDM) technique the increase in area of roads, skidtrails, landings, and felled tree gaps was estimated to be 17.1%. A lidar-based regression model for estimating AGB was developed using lidar metrics from the 2010 lidar acquisition and corresponding AGB ground plot measurements. The estimator was then used to compute AGB estimates for the site in 2010 and 2011 using the 2010 and 2011 lidar acquisition data, respectively. A model-based statistical approach was then used to estimate the uncertainty of the changes in AGB between the acquisitions. Change in RDMs between lidar acquisitions was used to classify each 50 m cell in the study area as impacted or non-impacted by logging. The change in mean AGB for the entire study area was −9.1 Mg ha−1 ± 1.9 (mean ± SD) (P-value b 0.0001). The change in mean AGB for areas newly impacted in 2011 was −17.9 ± 3.1 Mg ha−1 (P-value b 0.0001) while the change in mean AGB for non-impacted areaswas significantly less at-2.6 ± 1.1 Mg ha−1 (P-value = 0.009). These results provide corroborating evidence of the spatial extent and magnitude of change due to low-intensity logging in tropical forests with heavy residual canopy cover. MenosThe objective of this study was to test the use of repeat flight, airborne laser scanning data (lidar) for estimating changes associatedwith low-impact selective logging (approx. 10-15 m3 ha-1 = 5-7% of total standing volume harvested) in natural tropical forests in the Western Brazilian Amazon. Specifically, we investigated change in area impacted by selective logging, change in tall canopy (30 m+) area, change in lidar canopy structuremetrics, and change in above ground biomass (AGB) using a model-based statistical framework. Ground plot measurements were only available from the time of the 2010 lidar acquisition. A simple differencing of the 2010 and 2011 lidar canopy height models identified areas where canopy over 30 m tall had been removed. Area of tall canopy dropped from 22.8% in 2010 to 18.7% in 2011, a reduction of 4.1%. Using a relative density model (RDM) technique the increase in area of roads, skidtrails, landings, and felled tree gaps was estimated to be 17.1%. A lidar-based regression model for estimating AGB was developed using lidar metrics from the 2010 lidar acquisition and corresponding AGB ground plot measurements. The estimator was then used to compute AGB estimates for the site in 2010 and 2011 using the 2010 and 2011 lidar acquisition data, respectively. A model-based statistical approach was then used to estimate the uncertainty of the changes in AGB between the acquisitions. Change in RDMs between lidar acquisitions was used to classify each 50 m c... Mostrar Tudo |
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Palavras-Chave: |
Acre; Amazonia Occidental; Amazônia Ocidental; Explotación forestal; Extração seletiva de madeira; Factores ambientales; Floresta Estadual do Antimary (AC); Geotécnica; Monitoramento ambiental; Teledetección; Western Amazon. |
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Thesagro: |
Condição ambiental; Extração da madeira; Floresta tropical; Impacto ambiental; Raio laser; Sensoriamento remoto. |
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Thesaurus Nal: |
Amazonía; Environmental factors; Environmental impact; Lásers; Lidar; Logging; Remote sensing. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03454naa a2200469 a 4500
001 2000225
005 2021-09-01
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1016/j.rse.2013.08.049$2DOI
100 1 $aANDERSEN, H. E.
245 $aMonitoring selective logging in western Amazonia with repeat lidar flights.$h[electronic resource]
260 $c2014
520 $aThe objective of this study was to test the use of repeat flight, airborne laser scanning data (lidar) for estimating changes associatedwith low-impact selective logging (approx. 10-15 m3 ha-1 = 5-7% of total standing volume harvested) in natural tropical forests in the Western Brazilian Amazon. Specifically, we investigated change in area impacted by selective logging, change in tall canopy (30 m+) area, change in lidar canopy structuremetrics, and change in above ground biomass (AGB) using a model-based statistical framework. Ground plot measurements were only available from the time of the 2010 lidar acquisition. A simple differencing of the 2010 and 2011 lidar canopy height models identified areas where canopy over 30 m tall had been removed. Area of tall canopy dropped from 22.8% in 2010 to 18.7% in 2011, a reduction of 4.1%. Using a relative density model (RDM) technique the increase in area of roads, skidtrails, landings, and felled tree gaps was estimated to be 17.1%. A lidar-based regression model for estimating AGB was developed using lidar metrics from the 2010 lidar acquisition and corresponding AGB ground plot measurements. The estimator was then used to compute AGB estimates for the site in 2010 and 2011 using the 2010 and 2011 lidar acquisition data, respectively. A model-based statistical approach was then used to estimate the uncertainty of the changes in AGB between the acquisitions. Change in RDMs between lidar acquisitions was used to classify each 50 m cell in the study area as impacted or non-impacted by logging. The change in mean AGB for the entire study area was −9.1 Mg ha−1 ± 1.9 (mean ± SD) (P-value b 0.0001). The change in mean AGB for areas newly impacted in 2011 was −17.9 ± 3.1 Mg ha−1 (P-value b 0.0001) while the change in mean AGB for non-impacted areaswas significantly less at-2.6 ± 1.1 Mg ha−1 (P-value = 0.009). These results provide corroborating evidence of the spatial extent and magnitude of change due to low-intensity logging in tropical forests with heavy residual canopy cover.
650 $aAmazonía
650 $aEnvironmental factors
650 $aEnvironmental impact
650 $aLásers
650 $aLidar
650 $aLogging
650 $aRemote sensing
650 $aCondição ambiental
650 $aExtração da madeira
650 $aFloresta tropical
650 $aImpacto ambiental
650 $aRaio laser
650 $aSensoriamento remoto
653 $aAcre
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aExplotación forestal
653 $aExtração seletiva de madeira
653 $aFactores ambientales
653 $aFloresta Estadual do Antimary (AC)
653 $aGeotécnica
653 $aMonitoramento ambiental
653 $aTeledetección
653 $aWestern Amazon
700 1 $aREUTEBUCH, S. E.
700 1 $aMcGAUGHEY, R. J.
700 1 $aOLIVEIRA, M. V. N. d'.
700 1 $aKELLER, M.
773 $tRemote Sensing of Environment$gv. 151, p. 157-165, Aug. 2014.
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Embrapa Acre (CPAF-AC) |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
11/09/2004 |
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Data da última atualização: |
21/07/2022 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ALBUQUERQUE, S. G. de. |
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Afiliação: |
SEVERINO GONZAGA DE ALBUQUERQUE, CPATSA. |
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Título: |
Preliminary evaluation of 30 varieties of nopal (Opuntia spp.) for fodder production in the semi-arid northeast, Brazil. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: CONGRESO NACIONAL, 10.; CONGRESO INTERNACIONAL SOBRE CONOCIMIENTO Y APROVECHAMIENTO DEL NOPAL Y OTRAS CACTACEAS DE VALOR ECONÓMICO, 8.; INTERNATIONAL CONGRESS ON CACTUS PEAR AND COCHINEAL, 5., 2004, Chapingo. Memorias... Chapingo: Universidad Autonoma Chapingo, 2004. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
The main problems associated with cultivation of fodder nopal in the Sertão region, Semi-arid Northeast, Brazil, are poor soils, high minimum temperature (above 20.5o C), and the armoured scale insect (Diaspis echinocacti - Bouchè). An experiment with 30 varieties was established in in December 1994 at Petrolina, State of Pernambuco, a site with 552.2 mm of rainfall (80% available in December-April). There were: 3 local varieties:- ‘Gigante’ (the most cultivated), ‘Redonda’ and ‘Doce’, nopal; .6 varieties introduced from South Africa in 1982 - Algerian, Corfu, Direkteur, Fusicaulis, Guayaquil and Skinners Court; 19 varieties introduced from Texas (USA) in 1986,; 2 varieties furnished by IPA: Clone IPA-19 and Clone IPA-20. Except ‘Doce’ (Nopalea cochenillifera), all varieties were O. ficus-indica. The experiment was organized, in a RCBD, with four replications. After disk plowing, the area was furrowed and manure was distributed, at the rate of 2.86 kg/m. The varieties were planted at the density of ca. 7,143 pads/ha. In September 1995, it was detected the armored scale in the first plots, which spread to other plots. In November 1996, a visual evaluation was performed by two technicians, and scores varying from 0 (no attack) to 10 (highest attack) were adopted. In May 1997, a test was performed with four products, each product for one block, and all of them controlled the insect. In January 1998, the first triennial harvest was done, leaving the basal-pad, all first order pads, and one second order pad in each first order pad. Average yield was 2.46 ± 1.86 ton DM/ha/year (CV = 75.5 %). The 12 most productive varieties, with DM production/ha/year and scale insect attack level n parenthesis were: 1317 - Chile fruit (6.07 ton; 1.50); 1327 - Marmillon Fodder (4.18 ton; 2.0); 1267 - Algeria Fodder (4.14 ton; 0.50); 1294 - Mexico vegetable (4.02 ton; 4.25); 1278 - Mexico Fodder (4.02 ton; 7.00); 1258 - Additional cv. (3.92 ton; 3.75); 1311 - Marmillon Fodder (3.70 ton; 1.50); Algerian (3.65 ton; 2.00); Clone IPA-20 (3.55 ton; 2.50); Clone IPA-19 (3.37 ton; 2.75); 1316 - Chile fruit (2.89 ton; 2.50); ‘Gigante’ (2.85 ton; 7.00). Even with that difference in performance between varieties, due to high CV, only 1317 - Chile fruit was superior (P<0.05) to ‘Gigante’ nopal. The local varieties were highly susceptible to scale insect, a trait that needs further research,(CV = 89.0%, due to block effect). In contrast to 1267 - Algeria Fodder, which, presented high yield, and showed low susceptibility to the scale insect, maintaining the stand above 90% of initial population, six years after planting and three years after first harvest. MenosThe main problems associated with cultivation of fodder nopal in the Sertão region, Semi-arid Northeast, Brazil, are poor soils, high minimum temperature (above 20.5o C), and the armoured scale insect (Diaspis echinocacti - Bouchè). An experiment with 30 varieties was established in in December 1994 at Petrolina, State of Pernambuco, a site with 552.2 mm of rainfall (80% available in December-April). There were: 3 local varieties:- ‘Gigante’ (the most cultivated), ‘Redonda’ and ‘Doce’, nopal; .6 varieties introduced from South Africa in 1982 - Algerian, Corfu, Direkteur, Fusicaulis, Guayaquil and Skinners Court; 19 varieties introduced from Texas (USA) in 1986,; 2 varieties furnished by IPA: Clone IPA-19 and Clone IPA-20. Except ‘Doce’ (Nopalea cochenillifera), all varieties were O. ficus-indica. The experiment was organized, in a RCBD, with four replications. After disk plowing, the area was furrowed and manure was distributed, at the rate of 2.86 kg/m. The varieties were planted at the density of ca. 7,143 pads/ha. In September 1995, it was detected the armored scale in the first plots, which spread to other plots. In November 1996, a visual evaluation was performed by two technicians, and scores varying from 0 (no attack) to 10 (highest attack) were adopted. In May 1997, a test was performed with four products, each product for one block, and all of them controlled the insect. In January 1998, the first triennial harvest was done, leaving the basal-pad, all first order pa... Mostrar Tudo |
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Palavras-Chave: |
Nordeste; Palma; Região Semi-árida. |
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Thesagro: |
Forragem; Palma Forrageira; Produção. |
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Thesaurus NAL: |
Opuntia. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPATSA/30019/1/OPB828.pdf
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Marc: |
LEADER 03516nam a2200205 a 4500
001 1154341
005 2022-07-21
008 2004 bl uuuu u00u1 u #d
100 1 $aALBUQUERQUE, S. G. de
245 $aPreliminary evaluation of 30 varieties of nopal (Opuntia spp.) for fodder production in the semi-arid northeast, Brazil.
260 $aIn: CONGRESO NACIONAL, 10.; CONGRESO INTERNACIONAL SOBRE CONOCIMIENTO Y APROVECHAMIENTO DEL NOPAL Y OTRAS CACTACEAS DE VALOR ECONÓMICO, 8.; INTERNATIONAL CONGRESS ON CACTUS PEAR AND COCHINEAL, 5., 2004, Chapingo. Memorias... Chapingo: Universidad Autonoma Chapingo$c2004
300 $c1 CD-ROM.
520 $aThe main problems associated with cultivation of fodder nopal in the Sertão region, Semi-arid Northeast, Brazil, are poor soils, high minimum temperature (above 20.5o C), and the armoured scale insect (Diaspis echinocacti - Bouchè). An experiment with 30 varieties was established in in December 1994 at Petrolina, State of Pernambuco, a site with 552.2 mm of rainfall (80% available in December-April). There were: 3 local varieties:- ‘Gigante’ (the most cultivated), ‘Redonda’ and ‘Doce’, nopal; .6 varieties introduced from South Africa in 1982 - Algerian, Corfu, Direkteur, Fusicaulis, Guayaquil and Skinners Court; 19 varieties introduced from Texas (USA) in 1986,; 2 varieties furnished by IPA: Clone IPA-19 and Clone IPA-20. Except ‘Doce’ (Nopalea cochenillifera), all varieties were O. ficus-indica. The experiment was organized, in a RCBD, with four replications. After disk plowing, the area was furrowed and manure was distributed, at the rate of 2.86 kg/m. The varieties were planted at the density of ca. 7,143 pads/ha. In September 1995, it was detected the armored scale in the first plots, which spread to other plots. In November 1996, a visual evaluation was performed by two technicians, and scores varying from 0 (no attack) to 10 (highest attack) were adopted. In May 1997, a test was performed with four products, each product for one block, and all of them controlled the insect. In January 1998, the first triennial harvest was done, leaving the basal-pad, all first order pads, and one second order pad in each first order pad. Average yield was 2.46 ± 1.86 ton DM/ha/year (CV = 75.5 %). The 12 most productive varieties, with DM production/ha/year and scale insect attack level n parenthesis were: 1317 - Chile fruit (6.07 ton; 1.50); 1327 - Marmillon Fodder (4.18 ton; 2.0); 1267 - Algeria Fodder (4.14 ton; 0.50); 1294 - Mexico vegetable (4.02 ton; 4.25); 1278 - Mexico Fodder (4.02 ton; 7.00); 1258 - Additional cv. (3.92 ton; 3.75); 1311 - Marmillon Fodder (3.70 ton; 1.50); Algerian (3.65 ton; 2.00); Clone IPA-20 (3.55 ton; 2.50); Clone IPA-19 (3.37 ton; 2.75); 1316 - Chile fruit (2.89 ton; 2.50); ‘Gigante’ (2.85 ton; 7.00). Even with that difference in performance between varieties, due to high CV, only 1317 - Chile fruit was superior (P<0.05) to ‘Gigante’ nopal. The local varieties were highly susceptible to scale insect, a trait that needs further research,(CV = 89.0%, due to block effect). In contrast to 1267 - Algeria Fodder, which, presented high yield, and showed low susceptibility to the scale insect, maintaining the stand above 90% of initial population, six years after planting and three years after first harvest.
650 $aOpuntia
650 $aForragem
650 $aPalma Forrageira
650 $aProdução
653 $aNordeste
653 $aPalma
653 $aRegião Semi-árida
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