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	Provedor de dados Acta Amazonica (1) Anais da ABC (AABC) (1) Autor COSTA,MARCOS H. (1) Carneiro Filho,Arnaldo (1) Couto-Santos,Fabiana R. (1) DAVIDSON,ERIC A. (1) Luizão,Flávio J. (1) NOBRE,CARLOS A. (1) SENNA,MÔNICA C.A. (1) Mais... Palavra-chave Savannization (2) Amazon (1) Climate (1) Climate change (1) Deforestation (1) Ecosystem model (1) Ecotone (1) Net primary production (1) Protected areas (1) Spectral linear mixture model (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Ano 2014 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The influence of the conservation status and changes in the rainfall regime on forest-savanna mosaic dynamics in Northern Brazilian Amazonia Acta Amazonica Couto-Santos,Fabiana R.; Luizão,Flávio J.; Carneiro Filho,Arnaldo. Coupled carbon/climate models are predicting changes in Amazon carbon and water cycles for the near future, with conversion of forest into savanna-like vegetation. However, empirical data to support these models are still scarce for Amazon. Facing this scenario, we investigated whether conservation status and changes in rainfall regime have influenced the forest-savanna mosaic over 20 years, from 1986 to 2006, in a transitional area in Northern Amazonia. By applying a spectral linear mixture model to a Landsat-5-TM time series, we identified protected savanna enclaves within a strictly protected nature reserve (Maracá Ecological Station - MES) and non-protected forest islands at its outskirts and compared their areas among 1986/1994/2006. The protected... Tipo: Info:eu-repo/semantics/article Palavras-chave: Spectral linear mixture model; Ecotone; Savannization; Climate change; Protected areas. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200005 Modeling the impact of net primary production dynamics on post-disturbance Amazon savannization Anais da ABC (AABC) SENNA,MÔNICA C.A.; COSTA,MARCOS H.; DAVIDSON,ERIC A.; NOBRE,CARLOS A.. Amazon tropical forests are being replaced by pasturelands and croplands, but they sometimes revert to regrowth forest when abandoned after a period of agricultural use. Research suggests that this secondary regrowth is limited by climate and nutrient availability and, using a coupled biosphere-atmosphere model, we investigated patterns in the regrowth of the Amazon rainforest after a full deforestation event, considering different types of nutrient stress. We found that, over a 50 year regrowth period, the reduction of precipitation caused by large-scale deforestation was not sufficient to prevent secondary forest regrowth, but this decrease in precipitation combined with nutrient limitation, due to logging and frequent fires, did indeed prevent forest... Palavras-chave: Amazon; Climate; Deforestation; Ecosystem model; Net primary production; Savannization. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200621 Registros recuperados: 2 Primeira ... 1 ... Última

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