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| MIRANDA, S. DO C. DE; BUSTAMANTE, M.; PALACE, M.; HAGEN, S.; KELLER, M.; FERREIRA, L. G.. |
| The Cerrado, the savanna biome in central Brazil, mostly comprised of woodland savanna, is experiencing intense and fast land use changes. To understand the changes in Cerrado carbon stocks, we present an overview of biomass distribution in different Cerrado vegetation types (i.e., grasslands, shrublands and forestlands). We surveyed 26 studies including 170 Cerrado sites. The grasslands presented mean total biomass of 24 Mg/ha, with 70 percent allocated in the belowground portion. In shrublands, the mean total biomass was 58 Mg/ha being 58 percent in the belowground portion. Finally, in forestlands the mean total biomass was 98 Mg/ha with 18 percent as belowground biomass. The surveyed studies presented 12 allometric equations for biomass estimate, most... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Allometric equations; Belowground - aboveground ratio; Carbon stoks; Cerrado; Rainfall; Wood density. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/983456 |
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| ESPÍRITO-SANTO, F. D. B.; GLOOR, M.; KELLER, M.; MALHI, Y.; SAATCHI, S.; NELSON, B.; OLIVEIRA JUNIOR, R. C.; PEREIRA, C.; LLOYD, J.; FROLKING, S.; PALACE, M.; SHIMABUKURO, Y. E.; DUARTE, V.; MONTEAGUDO MENDOZA, A.; LÓPEZ-GONZÁLEZ, G.; BAKER, T. R.; FELDPAUSCH, T. R.; BRIENEN, R. J. W.; ASNER, G. P.; BOYD, D. S.; PHILLIPS, O. L.. |
| Forest inventory studies in the Amazon indicate a large terrestrial carbon sink. However, field plots may fail to represent forest mortality processes at landscape-scales of tropical forests. Here we characterize the frequency distribution of disturbance events in natural forests from 0.01ha to 2,651ha size throughout Amazonia using a novel combination of forest inventory, airborne lidar and satellite remote sensing data. We find that small-scale mortality events are responsible for aboveground biomass losses of ~1.7PgCy;1 over the entire Amazon region. We also find that intermediate-scale disturbances account for losses of ~0.2PgCy1, and that the largest-scale disturbances as a result of blow-downs only account for losses of ~0.004PgCy1. Simulation of... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Clima; Ciência da Terra; Floresta; Amazônia; Carbono. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/984523 |
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| ESPÍRITO-SANTO, F. D. B.; GLOOR, M.; KELLER, M.; MALHI, Y.; SAATCHI, S.; NELSON, B.; OLIVEIRA JUNIOR, R.; PEREIRA, C.; LLOYD, J.; FROLKING, S.; PALACE, M.; SHIMABUKURO, Y.; DUARTE, V.; MENDONZA, A.; LOPEZ-GONZALEZ, G.; BAKER, T. R.; FELDPAUSCH, T.; ASNER, G.; BOYD, D.; PHILLIPS, O.. |
| 2014 |
| Tipo: Resumo em anais de congresso (ALICE) |
Palavras-chave: Carbono; Floresta; Amazônia; Carbon; Florest; Amazon. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1003888 |
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| TREUHAFT, R.; GONÇALVES, F.; SANTOS, J. R. DOS; KELLER, M.; PALACE, M.; MADSEN, S. N.; SULLIVAN, F.; GRAÇA, P. M. L. A.. |
| This letter reports the sensitivity of X-band interferometric synthetic aperture radar (InSAR) data from the first dual-spacecraft radar interferometer, TanDEM-X, to variations in tropical-forest aboveground biomass (AGB). It also reports the first tropical-forest AGB estimates fromTanDEM-X data. Tropical forests account for about 50% of the world?s forested biomass and play critical roles in the control of atmospheric carbon dioxide by emission through deforestation and uptake through forest growth.The TanDEM-X InSAR data used in this analysis were taken over the Tapajós National Forest, Pará, Brazil, where field measurements from 30 stands were acquired. The magnitude of the InSAR normalized complex correlation, which is called coherence, decreases by... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Biomass; Interferometric synthetic aperture radar (InSAR); Lidar; Tropical forest. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/993983 |
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