Fig. 2. Aggregation Index (AI, empty bars) and percentage of natural vegetation (PNV, gray bars) by land ownership type, in three subregions: (a) Costa del Golfo, (b) Llanuras, and (c) Sierras. Land ownership types include: COL= colonia, A settlement for agriculture/cattle-raising), COM= communal, EJ= Ejido, NCP= new population settlement (new Ejido), PEQ= small private property, PP= private property, TN= Nation lands, and ZF= federal lands.