Data/hora: 15/06/2024 15:35:21

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 05/02/2016
Data da última atualização: | 24/02/2016
Autoria: | BEUCHLE, R.; GRECCHI, R. C.; SHIMABUKURO, Y. E.; SELIGER, R.; EVA, H. D.; SANO, E. E.; ARCHARD, F.
Afiliação: | Rene Beuchle, Joint Research Centre of the European Commission; Rosana Cristina Grecchi, Joint Research Centre of the European Commission; Yosio Edemir Shimabukuro, Joint Research Centre of the European Commission; INPE; Roman Seliger, Universität Leipzig, Institut für Geographie; Hugh Douglas Eva, Joint Research Centre of the European Commission; EDSON EYJI SANO, CPAC; Frédéric Achard, Joint Research Centre of the European Commission.
Título: | Land cover changes in the Brazilian Cerrado and Caatinga biomes from 1990 to 2010 based on a systematic remote sensing sampling approach
Ano de publicação: | 2015
Fonte/Imprenta: | Applied Geography, v. 58, p. 116,127, Mar. 2015.
DOI: | http://dx.doi.org/10.1016/j.apgeog.2015.01.017
Idioma: | Português
Conteúdo: | Abstract - The main objective of our study was to provide consistent information on land cover changes between the years 1990 and 2010 for the Cerrado and Caatinga Brazilian seasonal biomes. These areas have been overlooked in terms of land cover change assessment if compared with efforts in monitoring the Amazon rain forest. For each of the target years (1990, 2000 and 2010) land cover information was obtained through an object-based classification approach for 243 sample units (10 km × 10 km size), using (E)TM Landsat images systematically located at each full degree confluence of latitude and longitude. The images were automatically pre-processed, segmented and labelled according to the following legend: Tree Cover (TC), Tree Cover Mosaic (TCM), Other Wooded Land (OWL), Other Land Cover (OLC) and Water (W). Our results indicate the Cerrado and Caatinga biomes lost (gross loss) respectively 265,595 km2 and 89,656 km2 of natural vegetation (TC + OWL) between 1990 and 2010. In the same period, these areas also experienced gain of TC and OWL. By 2010, the percentage of natural vegetation cover remaining in the Cerrado was 47% and in the Caatinga 63%. The annual (net) rate of natural vegetation cover loss in the Cerrado slowed down from ?0.79% yr?1 to ?0.44% yr?1 from the 1990s to the 2000s, while in the Caatinga for the same periods the rate increased from ?0.19% yr?1 to ?0.44% yr?1. In summary, these Brazilian biomes experienced both loss and gains of Tree Cover and Other Wooded Land; however a continued net loss of natural vegetation was observed for both biomes between 1990 and 2010. The average annual rate of change in this period was higher in the Cerrado (?0.6% yr?1) than in the Caatinga (?0.3% yr?1).
Palavras-Chave: | Land cover change; Sampling approach.
Thesagro: | Caatinga; Cerrado; Cobertura do solo; Desmatamento; Sensoriamento remoto.
Thesaurus Nal: | Deforestation; Remote sensing.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/138522/1/sano-Land-cover.pdf
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (35155-1) - UPC - AP - PP - S2058 -  - S2058 - DIS