Abstract
Of the great numbers of seeds and spores which are produced annually by the plant kingdom, only a relatively small number germinate, and fewer still are able to withstand the tremendous competition for light, soil moisture, nutrients, etc. Only a small number of seedlings are able to ecese. Weaver and Clements (8) state that competition in effecting the supply of water and light is most decisive during the development of the seedling and at the time of reproduction, particularly among perennials and woody plants. Accordingly it plays a large part in determining the number of occupants and of invaders in an area in each stage of a sere and thus in helping to control the course of development.
COinS
