Tropical forests 10 Forest ecosystem 6 Forest management 6 Ecology 5 Forests 5 Biodiversity 4 Forest conservation 4 Forestry 4 Forests and Forest Trees (Biology and Ecology) 4 Rain forests 4 Conservation 3 Deforestation 3 Forest ecology 3 Agrobiodiversity 2 Agroforestry system 2 Biodiversity conservation 2 Biological Resources (Plant) 2 Dissertations, Academic (Ph.D) 2 Ecosystem 2 English 2 Insect pests 2 Meteorology and Climate 2 Natural Resource Economics, (New March 2000) 2 Novel 2 Plant Ecology 2 Plants 2 Pollution and Degradation 2 Restoration ecology 2 Silviculture 2 South Asia 2