Factors Regulating Population
Following factors does population regulation:
(i) Physical attributes of the environment (e.g. climate),
(ii) Food (quantity and quality),
(iii) Disease (host-parasite relationships).
(iv) Predation,
(v) Competition (inter-specific and intra-specific).
An ecosystem contains numerous populations of different species of plants, animals and microbes; all of them interact with one another as a community and with the physical environment as well. A community or biotic community, thus, consists of the population of plants and animals living together in a particular place.
CMP Bio World 