Ecology 13 Habitats 13 Habitat 11 Dissertations, Academic (Ph.D) 10 Thesis (Ph.D)-Zoology 7 Aquatic ecology 6 Fishes 6 Agronomy 5 Biodiversity 5 Nature conservation 5 Wetland ecology 5 Aquatic environment 4 Climatic changes 4 Environmental aspects 4 Environmental management 4 Ethnology 4 Modern ecology 4 Aquatic plants 3 Biochemical Phenomena 3 Biological Resources (Plant) 3 Climate Change Education and Research 3 Community ecology 3 Entomology 3 Environmental Microbiology 3 Environmental economics 3 Evolution 3 Freshwater ecology 3 Genome 3 Habitat Asia 3 Habitat ecology 3