(par 4.2.2.1) Complete information on Habitat and its Types
http://www.preservearticles.com/201101022258/complete-information-on-habitat-and-its-types.html NIRMALA AGARWAL The place where an organism lives is known as habitat. The term habitat is more specific environment. Habitat constitutes a part of the total environment of that region. It must offer to an organism shelter, food and congenial climatic conditions which will be well-suited for the organism to survive, reproduce and flourish. […]
(par 4.2.2.1) Ecological niche
https://en.wikipedia.org/wiki/Ecological_niche From Wikipedia, the free encyclopedia The flightless dung beetle occupies a niche exploiting animal droppings as a food source In ecology, a niche (CanE, UK /ˈniːʃ/ or US /ˈnɪtʃ/)[1] is a term with a variety of meanings related to the behavior of a species living under specific environmental conditions.[2] The ecological niche describes how an organism or population responds to the distribution of resources and competitors (for example, […]
(par 4.2.2.1) Competition – from Wikipedia
From Wikipedia, the free encyclopedia Sea anemones compete for the territory in tide pools Competition is an interaction between organisms or species in which the fitness of one is lowered by the presence of another. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.[1] Competition both within and between species is an important topic in ecology, especially community ecology. Competition is one of many interacting biotic and abiotic factors that affect community structure. Competition among […]