Author pages are created from data sourced from our academic publisher partnerships and public sources.
- Publications
- Influence
Characterization of pasture biophysical properties and the impact of grazing intensity using remotely sensed data
- Izaya Numata, D. Roberts, +4 authors J. V. Soares
- Environmental Science
- 15 August 2007
Abstract Remote sensing has the potential of improving our ability to map and monitor pasture degradation. Pasture degradation is one of the most important problems in the Amazon, yet the manner in… Expand
Ten-Year Landsat Classification of Deforestation and Forest Degradation in the Brazilian Amazon
- Carlos M. Souza, João V. Siqueira, +7 authors J. Barlow
- Computer Science, Geology
- Remote. Sens.
- 28 October 2013
TLDR
Large area mapping of land‐cover change in Rondônia using multitemporal spectral mixture analysis and decision tree classifiers
- D. Roberts, Izaya Numata, +5 authors O. Chadwick
- Geography
- 27 October 2002
[1] We describe spatiotemporal variation in land cover over 80,000 km2 in central Rondonia. We use a multistage process to map primary forest, pasture, second growth, urban, rock/savanna, and water… Expand
Evaluation of hyperspectral data for pasture estimate in the Brazilian Amazon using field and imaging spectrometers
- Izaya Numata, D. Roberts, O. Chadwick, J. Schimel, L. S. Galvao, J. V. Soares
- Environmental Science
- 15 April 2008
We used two hyperspectral sensors at two different scales to test their potential to estimate biophysical properties of grazed pastures in Rondonia in the Brazilian Amazon. Using a field… Expand
Sources of error in accuracy assessment of thematic land-cover maps in the Brazilian Amazon
- R. Powell, N. Matzke, +4 authors D. Roberts
- Geography
- 30 March 2004
Abstract Valid measures of map accuracy are critical, yet can be inaccurate even when following well-established procedures. Accuracy assessment is particularly problematic when thematic classes lie… Expand
Carbon emissions from deforestation and forest fragmentation in the Brazilian Amazon
- Izaya Numata, M. A. Cochrane, Carlos M. Souza, Marcio H. Sales
- Environmental Science
- 1 October 2011
Forest-fragmentation-related edge effects are one of the major causes of forest degradation in Amazonia and their spatio-temporal dynamics are highly influenced by annual deforestation patterns.… Expand
Evaluation of Landsat-Based METRIC Modeling to Provide High-Spatial Resolution Evapotranspiration Estimates for Amazonian Forests
- Izaya Numata, Kul Khand, J. Kjaersgaard, M. Cochrane, S. Silva
- Geology, Computer Science
- Remote. Sens.
- 6 January 2017
TLDR
Wildfires in Bamboo-Dominated Amazonian Forest: Impacts on Above-Ground Biomass and Biodiversity
- J. Barlow, J. Silveira, +7 authors M. Cochrane
- Biology, Medicine
- PloS one
- 9 March 2012
Fire has become an increasingly important disturbance event in south-western Amazonia. We conducted the first assessment of the ecological impacts of these wildfires in 2008, sampling forest… Expand
The responses of leaf litter ant communities to wildfires in the Brazilian Amazon: a multi-region assessment
- J. Silveira, J. Barlow, +6 authors M. Cochrane
- Geography
- Biodiversity and Conservation
- 1 February 2013
Fire is frequently used as tool for land management in the Amazon, but often escapes into surrounding forests, with potentially severe impacts for forest biodiversity. We investigated the effects of… Expand
Biomass collapse and carbon emissions from forest fragmentation in the Brazilian Amazon
- Izaya Numata, M. Cochrane, D. Roberts, J. V. Soares, Carlos M. Souza, Marcio H. Sales
- Environmental Science
- 1 September 2010
[1] Forest fragmentation due to deforestation is one of the major causes of forest degradation in the Amazon. Biomass collapse near forest edges, especially within 100 m, alters aboveground biomass… Expand