Biotic communities Natural history Habitat (Ecology) 17 Ecology 15 Animals 14 Motion picture authorship 6 Desert ecology 5 mehr ... Adaptation (Biology) 4 Natural areas 4 Predation (Biology) 3 Animals and civilization 2 Cities and towns 2 Deserts 2 Environmental aspects 2 Grasslands 2 History 2 Islands 2 Jungles 2 Mountains 2 Petroleum industry and trade 2 Wildlife conservation 2 Biodiversity 1 Coastal forests 1 Coral reef ecology 1 Education 1 El Niño Current 1 Evolution (Biology) 1 Herbivores 1 Historical geology 1 Kelp bed ecology 1 weniger ...