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| Registros recuperados: 71 | |
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| NUMATA, I.; SILVA, S. S.; COCHRANE, M. A.; OLIVEIRA, M. V. N. d'. |
| The Amazon holds the largest tropical rain forest formation in the world but this natural ecosystem has been altered by both anthropogenic and natural disturbances since the 1970s (Davidson et al., 2012). The Brazilian Amazon experienced the highest annual tropical deforestation rates until the mid-2000s when rates began to decline dramatically due to the government?s environmental law enforcement. Conversely, other forest disturbances, such as understory fire, selective logging, and fragmentation (Aragao et al., 2014; Arima et al., 2014) have gained more importance in terms of their impacts on remnant forests. The degree of forest degradation varies as functions of disturbance type, the intensity and frequency of disturbance events, and the time since... |
| Tipo: Artigo de periódico |
Palavras-chave: Fragmentação florestal; Borda florestal; Idade da borda; Acre; Western Amazon; Amazonia Ocidental; Análisis estadístico; Madera tropical; Bosques tropicales; Cubierta vegetal; Dinámica poblacional; Efectos de borde; Fragmentación de hábitats; Incendios forestales; Inventario forestal; Mortalidad; Regeneración natural.; Floresta tropical; Essência florestal; Incêndio florestal; Impacto ambiental; Dinâmica populacional; Mortalidade; Regeneração natural; Cobertura vegetal; Inventário florestal; Análise estatística; Tropical forests; Tropical wood; Forest fires; Environmental impact; Population dynamics; Mortality; Habitat fragmentation; Natural regeneration; Vegetation cover; Edge effects; Forest inventory; Statistical analysis.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1072940 |
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| SAATCHI, S.; MASCARO, J.; XU, L.; KELLER, M.; YANG, Y.; DUFFY, P.; ESPÍRITO-SANTO, F.; BACCINI, A.; CHAMBERS, J.; SCHIMEL, D.. |
| In a recent paper (Mitchard et al. 2014, Global Ecology and Biogeography, 23, 935?946) a new map of forest biomass based on a geostatistical model of field data for the Amazon (and surrounding forests) was presented and contrasted with two earlier maps based on remotesensing data Saatchi et al. (2011; RS1) and Baccini et al. (2012; RS2). Mitchard et al. concluded that both the earlier remote-sensing based maps were incorrect because they did not conform to Mitchard et al. interpretation of the field-based results. In making their case, however, they misrepresented the fundamental nature of primary field and remote-sensing data and committed critical errors in their assumptions about the accuracy of research plots, the interpolation methodology and the... |
| Tipo: Artigo de periódico |
Palavras-chave: Tree height.; Spatial modelling; Allometry; Biomass; Lidar; Remote sensing; Tropical forests; Wood density.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001136 |
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| SILVA, P. H. da; GOMIDE, L. R.; FIGUEIREDO, E. O.; CARVALHO, L. M. T. de; FERRAZ FILHO, A. C.. |
| Reduced-impact logging is a well known practice applied in most sustainable forest management plans in the Amazon. Nevertheless, there are still ways to improve the operational planning process. Therefore, the aim of this study was to create an integer linear programming (ILP) to fill in the knowledge gaps in the decision support system of reduced impact logging explorations. The minimization of harvest tree distance to wood log landing was assessed. Forest structure aspects, income and wood production were set in the model, as well as the adjacency constraints. Data are from a dense ombrophylous forest in the western Brazilian Amazon. We applied the phytosociological analysis and BDq method to define the selective logging criteria. Then, ILP models were... |
| Tipo: Artigo de periódico |
Palavras-chave: Manejo florestal sustentável; Selective logging; Reduced-impact logging; Porto Acre (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Silvicultura sustentable.; Manejo forestal; Optimización de los sistemas; Patios de clasificación; Programación lineal; Administração florestal; Floresta tropical; Extração da madeira; Estocagem; Método de otimização; Programação linear; Sustainable forestry; Tropical forests; Sort yards; System optimization; Linear programming.. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088841 |
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| MOONLIGHT, P. W.; BANDA-R, K.; PHILLIPS, O. L.; DEXTER, K. G.; PENNINGTON, R. T.; BAKER, T. R.; LIMA, H. C. de; FAJARDO, L.; GONZALEZ-M., R.; PALOMINO, R. L.; LLOYD, L.; NASCIMENTO, M.; PRADO, D.; QUINTANA, C.; RIINA, R.; RODRIGUEZ M. G. M.; VILLELA, D. M.; AQUINO, A. C. M. M.; ARROYO, L.; BEZERRA, C.; BRUNELLO, A. T.; BRIENEN, R. J. W.; CARDOSO, D.; CHAO, K.-J.; COUTINHO, I. A. C.; CUNHA, J.; DOMINGUES, T.; SANTO, M. M. do E.; FELDPAUSCH, T. R.; FERNANDES, M. F.; GOODWIN, Z. A.; JIMENEZ, E. M.; LEVESLEY, A.; TOLEDO, L. L.; MARIMON, B.; MIATTO, R. C.; MIZUSHIMA, M.; MONTEAGUDO, A.; MOURA, M. S. B. de; MURAKAMI, A.; NEVES, D.; CHEQUIN, R. N.; OLIVEIRA, T. C. de S.; OLIVEIRA, E. A. de; QUEIROZ, L. P. de; PILON, A.; RAMOS, D. M.; REYNEL, C.; RODRIGUES, P. M. S.; SANTOS, R.; SARKINEN, T.; SILVA, V. F. da; SOUZA, R. M. S.; VASQUEZ, R.; VEENENDAAL, E.. |
| Understanding of tropical forests has been revolutionized by monitoring in permanent plots. Data from global plot networks have transformed our knowledge of forests? diversity, function, contribution to global biogeochemical cycles, and sensitivity to climate change. Monitoring has thus far been concentrated in rain forests. Despite increasing appreciation of their threatened status, biodiversity, and importance to the global carbon cycle, monitoring in tropical dry forests is still in its infancy. We provide a protocol for permanent monitoring plots in tropical dry forests. Expanding monitoring into dry biomes is critical for overcoming the linked challenges of climate change, land use change, and the biodiversity crisis. |
| Tipo: Artigo de periódico |
Palavras-chave: Parcelas de longo prazo; Florestas tropicais secas; Dinâmica da vegetação; Estrutura da vegetação; Monitoramento; Floresta Tropical; Vegetação; Biodiversidade; Tropical forests; Dry forests; Vegetation structure. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1130180 |
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| BISPO, P. da C.; PARDINI, M.; PAPATHANASSIOU, K. P.; KUGLER, F.; BALZTER, H.; RAINS, D.; SANTOS, J. R. dos; RIZAEV, I. G.; TANSEY, K.; SILVA, M. F. da; ARAUJO, L. S. de. |
| Abstract: Knowledge of the spatial patterns of successional stages (i.e., primary and secondary forest) in tropical forests allows to monitor forest preservation, mortality and regeneration in relation to natural and anthropogenic disturbances. Different successional stages have also different capabilities of re-establishing carbon stocks. Therefore, a successful discrimination of successional stages over wide areas can lead to an improved quantification of above ground biomass and carbon stocks. The reduction of the mapping uncertainties is especially a challenge due to high heterogeneity of the tropical vegetation. In this framework, the development of innovative remote sensing approaches is required. Forests (top) height (and its spatial distribution)... |
| Tipo: Artigo de periódico |
Palavras-chave: Forest height; TanDEM-X.; Floresta Tropical; Mapa; Sensoriamento Remoto; Tropical forests; Forest succession; Height; Interferometry; Synthetic aperture radar.. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115303 |
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| MEDEIROS, R.; ANDRADE, J.; RAMOS, D.; MOURA, M. S. B. de; PÉREZ-MARIN, a. m.; SANTOS, C. A. C. dos; SILVA, B. B. da; CUNGA, J.. |
| The Caatinga is the largest nucleus of Seasonally Dry Tropical Forests (SDTF) in the Neotropics. The leafing patterns of SDTF vegetation are adapted to the current environmental and climate variability, but the impacts of climate change tend to alter plants? phenology. Thus, it is necessary to characterise phenological parameters and evaluate the relationship between vegetation and environmental drivers. From this information, it is possible to identify the dominant forces in the environment that trigger the phenological dynamics of the Caatinga. In this way, remote sensing represents an essential tool to investigate the phenology of vegetation, particularly as it has a long series of vegetation monitoring and allows relationships with different... |
| Tipo: Artigo de periódico |
Palavras-chave: Fenologia da superfície terrestre; Índices de vegetação; Sazonalmente seca; Sensoriamento Remoto; Floresta Tropical; Vegetação; Caatinga; Mudança Climática; Vegetation; Vegetation index; Tropical forests; Remote sensing; Climate change. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1144436 |
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| OSBORNE, O. G.; DOBREVA, M. P.; PAPADOPULOS, A. S. T.; MOURA, M. S. B. de; BRUNELLO, A. T.; QUEIROZ, L. P. de; PENNINGTON, R. T.; LLOYD, J.; SAVOLAINEN, V.. |
| The architecture of root systems is an important driver of plant fitness, competition and ecosystem processes. However, the methodological difficulty of mapping roots hampers the study of these processes. Existing approaches to match individual plants to belowground samples are low-throughput and species-specific. Here, we developed a scalable sequencing-based method to map the root systes of individual trees across multiple species. We successfully applied it to a tropical dry forest community in the Brazilian Caatinga containing 14 species We sequenced all 42 individual shrubs and trees in a 14 by 14 m plot using double-digest restriction-site associated sequencing (ddRADseq). We identified species-specific markers and individual-specific haplotypes from... |
| Tipo: Artigo de periódico |
Palavras-chave: Distribuição de densidade de raízes individuais; Comunidade tropical; DdRADseq; Mapeamento dos sistemas radiculares; Genotipagem; Caatinga; Ecologia Vegetal; Floresta Tropical; Árvore Florestal; Tropical forests; Plant ecology. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1149896 |
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| ANDRÉ, T.; MOULATLET, G. M.; ALMEIDA, T. E.; ALVERGA, P. P. de P.; BOELTER, C. R.; DRUCKER, D. P.; SILVA, J. G. da; LINARES-PALOMINO , R.; LOPES, M. A.; MAGALHÃES, J. L. L.; MANZATTO, A. G.; MEWS, H. A.; MOLL, I. E. de S.; MORTATI, A. F.; PAIXÃO, E. C. da; QUINTERO-VALLEJO, E.; ANDEL, T. van; SILVEIRA, M.; STORCK-TONON, D.; TUOMISTO, H.; ZUQUIM, G.; COSTA, F. R. C.. |
| In this article, we describe the database HERBase, an exhaustive compilation of published and unpublished data on herb inventories in Amazonia. |
| Tipo: Artigo de periódico |
Palavras-chave: Angiospermas; Samambaias; Florestas tropicais; Ervas do sub-bosque; Angiosperms; Ferns; Base de Dados; Zingiberales; Herbs; Databases; Tropical forests. |
| Ano: 2023 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1153421 |
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| PAPA, D. de A.; ALMEIDA, D. R. A. de; FIGUEIREDO, E. O.; OLIVEIRA, M. V. N. d'; CUNHA, R. M. da. |
| O objetivo desse estudo é utilizar o sensor Lidar para caracterizar uma área de floresta tropical primária. O estudo foi realizado no Acre, em uma área com vegetação do tipo floresta aberta com palmeira, bambu e manchas de floresta densa. A coleta de dados Lidar foi feita com o sensor embarcado em uma aeronave, que sobrevoou uma área de 800 hectares, onde também foi realizado o censo das árvores com DAP >=100; 40 cm. Foram feitas as análises de correlação, agrupamento e caracterização dos grupos. Como resultado, a altura média do dossel obtida pelo Lidar apresentou correlação de 0,74 com a área basal. Os grupos criados a partir da variável Lidar tiveram diferença significativa com os dados de campo, para quatro grupos: floresta densa com copas fechadas,... |
| Tipo: Parte de livro |
Palavras-chave: Amazônia Ocidental; Manejo florestal; Bosques tropicales; Canopy height; Altura del follaje; Análisis estadístico; Análisis de varianza; Análise de variância; Teledetección; Vehículos aéreos no tripulados; Drone; Embrapa Acre; Rio Branco (AC); Acre; Western Amazon; Amazonia Occidental.; Altura da copa; Sensoriamento Remoto; Administração Florestal; Altura; Método Estatístico; Identificação; Espécie Nativa; Floresta Tropical; Floresta Nativa; Análise Estatística; Campo Experimental.; Lidar; Remote sensing; Unmanned aerial vehicles.; Forest management; Tropical forests; Indigenous species; Statistical analysis; Analysis of variance. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110090 |
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| SMITH, M. N.; SCHITTI, J.; GONÇALVES, N.; MINOR, D.; ALMEIDA, D. R. A. de; ROCHA, D. G.; ARAGÓN, S.; MENIN, M.; GUEDES, M. C.; TONINI, H.; SILVA, K. E. da; ROSA, D. M.; NELSON, B. W.; CORDEIRO, C. L. O.; OLIVEIRA JUNIOR, R. C. de; SHAO, G.; SOUZA, M. S.; MCMAHON, S.; ALMEIDA, D.; ARAGÃO, L. E. O. C.; LIMA, N. Z. de; OLIVEIRA, G. de; ASSIS, R. L. de; CAMARGO, J. L.; MESQUITA, R. G.; SALESKA, S. R.; BRESHEARS, D. D.; COSTA, F. R. C.; STARK, S. C.. |
| A critical problem in tropical forest ecology is understanding how vegetation structure and function vary over environmental gradients. The degree to which forest structure changes across the Amazon basin and the role of environmental variability in shaping forest structure and dynamics are poorly characterised, despite the importance of these forests for regional and global climate. To address these challenges, we connected 10 years of investigations to amass a large database of ground-based profiling canopy lidar (PCL) data from 297 Amazon forest plots across large-scale environmental and disturbance gradients. Mean annual precipitation varied from 1,963 to 3,159 mm, number of dry season months from 0 to 5, and plot soil types covered about half of the... |
| Tipo: Parte de livro |
Palavras-chave: Ecologia Florestal; Floresta Tropical; Climatologia; Forest ecology; Tropical forests; Climatology. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120215 |
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| VIANA, J. P. G.; SIQUEIRA, M. V. B. M.; ARAUJO, F. L.; GRANDO, C.; SUJII, P. S.; SILVESTRE, E. de A.; NOVELLO, M.; PINHEIRO, J. B.; CAVALLARI, M. M.; BRANCALION, P. H. S.; RODRIGUES, R. R.; SOUZA, A. P. de; CATCHEN, J.; ZUCCHI, M. I.. |
| The primary focus of tropical forest restoration has been the recovery of forest structure and tree taxonomic diversity, with limited attention given to genetic conservation. Populations reintroduced through restoration plantings may have low genetic diversity and be genetically structured due to founder effects and genetic drift, which limit the potential of restoration to recover ecologically resilient plant communities. Here, we studied the genetic diversity, genetic structure and differentiation using single nucleotide polymorphisms (SNP) markers between restored and natural populations of the native tree Casearia sylvestris in the Atlantic Forest of Brazil. We sampled leaves from approximately 24 adult individuals in each of the study sites: two... |
| Tipo: Artigo de periódico |
Palavras-chave: SNP; Single nucleotide polymorphisms; Floresta Tropical; Casearia Sylvestris; Tropical forests. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1101157 |
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| KAINER, K. A.; DiGIANO, M. L.; DUCHELLE, A. E.; WADT, L. H. de O.; BRUNA, E.; DAIN, J. L.. |
| Local communities are important stakeholders in resource management and conservation efforts, particularly in the developing world. Although evidence is mixed in suggesting that these resident stakeholders are optimal forest stewards, it is highly unlikely that large tracts of tropical forests will be conserved without engaging local people who depend on them daily for their livelihoods. Stakeholders, who reside in biodiverse ecosystems like tropical forests, are the largest direct users and ultimate decision-makers of forest fate, can be important investors in conservation, harbor local ecological knowledge that complements Western science and frequently have long-term legitimate claims on lands where they reside. Research partnerships with local... |
| Tipo: Artigo de periódico |
Palavras-chave: Agricultura sustentable; Agricultura comunitaria; Bosques tropicales; Investigación cooperativa.; Grupos de interés; Comunidade rural; Agricultura sustentável; Floresta tropical úmida; Proteção ambiental; Pesquisa; Parceria; Pesquisador; Agricultura de Subsistência.; Community supported agriculture; Stakeholders; Subsistence farming; Sustainable agriculture; Tropical forests; Cooperative research.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/511990 |
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| Registros recuperados: 71 | |
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