E ́cologie 28 Ecology 26 Ecologie 15 Zeitschrift 8 O ̈kologie 6 42.90 ecology: general 5 Biologie 4 Biology 3 Environmental Pollution 3 Environnement 3 Pe ́riodiques 3 Pollution 3 43.47 global environmental themes 2 Bioge ́ographie 2 Biogeografie 2 Biogeography 2 Classification 2 E ́volution (Biologie) 2 Environment 2 Environmental Monitoring 2 Environmental protection 2 Human ecology 2 Natural history 2 Nature 2 Protection 2 35.73 molecular genetics 1 42.75 insects 1 42.95 nature conservation 1 Adaptation, Biological 1 Appropriate technology 1