CO2 effects 1 Payne's Creek National Park 1 Research & information: general 1 SAVANNA 1 altitude 1 biodiversity 1 biomass 1 climate change 1 community characteristics 1 conservation 1 culture 1 enclosure 1 endemism 1 floristics grassland degradation 1 grassland management 1 interventions 1 land cover change 1 land degradation 1 livestock 1 management 1 national parks 1 neotropical savannas 1 nomadic 1 policy 1 policy options 1 protected areas 1 rangeland productivity 1 remote sensing 1 restoration 1