Detecting subtle land use change in tropical forests |
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| Authors: | Anders H Sirén Eduardo S Brondizio |
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| Institution: | 1. Department of Animal Science, University of Santa Catarina State (UDESC), Chapecó, SC, Brazil;2. Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil;3. Laboratory of Veterinary Epidemiology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil;4. Department Animal Production, UDESC, Lages, SC, Brazil;5. Graduate Program in Toxicology Biochemical, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil |
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| Abstract: | This paper presents a study of land use and land cover dynamics in an indigenous community in the Amazon, in particular the methods used to deal with problems related to small size of cultivated plots, spectral similarity between land use classes, atmospheric haze and topographic shade. The main focus was on identifying and quantifying cultivated and fallow areas. Based on remote sensing alone, it was possible to identify about half of the fallows younger than 20 years of age. Combining remote sensing with field-based methods, however, it was possible to estimate the number and size of cultivated areas, the extent of fallows up to 65 years of age, as well as the rate of old-growth forest loss. |
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