nonbiological model article 6 Calcium 4 Computer Simulation 4 Conservation of Natural Resources 4 Dinamica EGO model 4 Ecosystem 4 Generates Roads and Fields for reproducing Fragmentation effects model 4 Human Activities 4 Humans 4 Models, Biological 4 Models, Theoretical 4 Qrule model 4 Regression Analysis 4 Simmap model 4 Software 4 Spatial Analysis 4 arable land 4 comparative study 4 controlled study 4 ecological phenomena and functions 4 environmental aspects and related phenomena 4 forest management 4 habitat 4 habitat cover 4 habitat fragmentation 4 habitat loss 4 land use 4 maximum field disconnection 4 maximum field size 4