Plant communities 9 Plant Ecology 6 Ecology 5 Plant ecology 5 Botany 4 Biodiversity 3 Biological Resources (Plant) 3 Plant physiology 3 Plants 3 plant communities 3 Biology 2 Forest ecology 2 Forests 2 Forests and Forest Trees (Biology and Ecology) 2 Nature conservation 2 Oecological factors 2 Reproduction 2 Seed dispersal 2 Seeds 2 Allelopathy 1 Animal Ecology 1 Animal ecology 1 Animal-plant relationships 1 Aquatic plants 1 Aquatic weeds 1 Asexual reproduction 1 Behaviour 1 Behaviour (Wild Animals), (New March 2000) 1 Botony 1 Canopy gaps 1