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Wednesday, April 11 • 4:45pm - 5:00pm
PROCESSES IN AGRICULTURAL LANDSCAPES: Deforestation and Forest Degradation in the Amazon’s Agriculture Frontier

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AUTHORS: Andrea Santos Garcia*, Center of Nuclear Energy in Agriculture, University of São Paulo, and Landscape initiative, Institute on the Environment, University of Minnesota; Maria Victoria Ramos Ballester, The Center of Nuclear Energy in Agriculture, University of São Paulo

ABSTRACT: Deforestation is the removal of a forest stand, while forest degradation corresponds to the loss of forest quality rather than forest area. Deforestation is normally the consequence of land use change, which replaces native vegetation for agricultural areas. Forest degradation is caused by logging activities, uncontrolled fires, fuel wood collection, livestock grazing in forests, and fragmentation. We are studying these two processes in the Xingu River Basin aiming to figure out the relationship between these process and different land uses. We have mapped deforestation and forest degradation from 1985 to 2015 in area of around 17 mi hectares through multitemporal spectral mixture analysis using the CLASlite software. Here, we present preliminary analyses based on the observations made from 2010 to 2015 for the entire study area at municipality level. The area of forest that have been cleaned or degraded between 2010 and 2015 in each municipality is positively correlated with the remaining forest area as expected. In other words, the trend line indicates that while there is forest to be cleared, the process will not stop. Forest degradation presented a smaller variability than deforestation when comparing each municipality rate with its area used for agriculture, pastureland, double cropping, single cropping, or degraded pasturelands. When analyzing correlation between deforestation or forest degradation and land uses, the overall correlation is weak. However, it becomes much higher when building different models for municipalities in different states of agricultural development demonstrating that factors those processes do not act on the entire Basin with the same intensity. Clearly, each state of agricultural development implies in different drivers. In a next step we will (i) evaluate the spatial pattern between deforestation/forest degradation and different land uses, and (ii) the relationship with socioeconomic dynamics.

Wednesday April 11, 2018 4:45pm - 5:00pm CDT
Adams Room

Attendees (4)