Título:	Soil organic matter responses to anthropogenic forest disturbance and land use change in the Eastern Brazilian Amazon.
Autoria:	DURIGAN, M. R. CHERUBIN, M. R. CAMARGO, P. B. de FERREIRA, J. N. BERENGUER, E. GARDNER, T. A. BARLOW, J. DIAS, C. T. dos S. SIGNOR, D. OLIVEIRA JUNIOR, R. C. de CERRI, C. E. P.
Afiliação:	MARIANA REGINA DURIGAN, ESALQ/USP MAURÍCIO ROBERTO CHERUBIN, CENA/USP PLÍNIO BARBOSA DE CAMARGO, CENA/USP JOICE NUNES FERREIRA, CPATU ERIKA BERENGUER, Lancaster University / University of Oxford TOBY ALAN GARDNER, International Institute for Sustainability / Stockholm Environment Institute JOS BARLOW, Lancaster University / MPEG CARLOS TADEU DOS SANTOS DIAS, ESALQ/USP DIANA SIGNOR DEON, CPATSA RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU CARLOS EDUARDO PELLEGRINO CERRI, ESALQ/USP.
Ano de publicação:	2017
Referência:	Sustainability, v. 9, n. 3, Mar. 2017.
Conteúdo:	Anthropogenic forest disturbance and land use change (LUC) in the Amazon region is the main source of greenhouse gas emissions to the atmosphere in Brazil, due to the carbon (C) and nitrogen (N) emitted from vegetation clearance. Land use conversion associated with management practices plays a key role in the distribution and origin of C in different soil organic matter (SOM) fractions. Here, we show how changing land use systems have influenced soil C and N stocks, SOM physical fractions, and the origin of SOM in the Santarém region of the eastern Brazilian Amazon. Soil C and N stocks were calculated for the surface layer of 0?30 cm. Anthropogenic disturbances to the standing forest, such as selective logging and wildfires, led to significant declines in soil C and N stocks. However, in the long-term, the conversion of the Amazon forest to pasture did not have a noticeable effect on soil C and N stocks, presumably because of additional inputs from pasture grasses. However, the conversion to cropland did lead to reductions in soil C and N content. According to the physical fractionation of SOM, LUC altered SOM quality, but silt and clay remained the combined fraction that contributed the most to soil C storage. Our results emphasize the importance of implementing more sustainable forest management systems, whilst also calling further attention to the need for fire monitoring systems, helping to ensure the resilience of C and N stocks and sequestration in forest soils; thereby contributing towards urgently needed ongoing efforts to mitigate climate change
Thesagro:	Floresta Pastagem Solo Matéria orgânica Carbono Efeito Estufa Mudança Climática
NAL Thesaurus:	Tropical forests Cropland
Palavras-chave:	Manejo de solo Uso do solo Sequestro de carbono Mitigação Pasture Soil carbon
ISSN:	2071-1050
Digital Object Identifier:	http://dx.doi.org/10.3390/su9030379
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPATSA)