Savannas Grasslands 4 Deserts 3 Forests 3 Grasslands and Rangelands 3 Mountains 3 Arid lands 2 Biodiversity 2 Biological Resources (Plant) 2 Forests and Forest Trees (Biology and Ecology) 2 Nature conservation 2 Rain forests 2 Sustainability 2 Tropical rain forests 2 Accommodation 1 Agencies and Organizations 1 Animal Ecology 1 Arthropod communities 1 Beaches 1 Biological Resources (Animal) 1 Cliffs 1 Climatic change 1 Coasts 1 Coral reefs 1 Deltas 1 Economic impact 1 Ecotourism 1 Education and Training 1 Endomycorrhizas 1 Environmental impact 1