Assessment of land use changes on woody cover and landscape fragmentation in the Orinoco savannas using fractal distributions

摘要: Abstract The effect of land use changes on the woody cover and patchiness Orinoco lowlands was analyzed from 1951 to 1997 by using a stretched exponential model in terms patch size distribution. We selected five production systems basis following components: policy option, technology environment. They are: (a) high-input pasture deep soil (DL-HIGraz), (b) low-input cropping (DH-LOCrop), (c) (DH-HICrop), (d) shallow (SL-LOCrop) (e) extensive cattle grazing (SL-LOGraz). For comparison, stands with similar depth density (DL-Fallow, DH-Fallow SL-Fallow) were at protected Biological Reserve Calabozo region. Results indicate that distribution patches described c as exponent magnitude reflected over time. Thus, parameter for human impacted higher than fallow stands. implies impact had multiscalar mosaic, multiplicative processes. There is generic mechanism exhibiting an anomalous such has been proposed physical systems. Therefore, number generation processes (i.e. inverse c) lower As time establishment proceeded, there tendency re-organization biotic effects.