From Biology-Online Dictionary | Biology-Online Dictionary
Revision as of 12:37, 14 May 2008 by Honee_v (talk | contribs) (updated definition and internal links)



1. the external conditions, resources, stimuli etc. with which an organism interacts

2. the external surroundings including all of the biotic and abiotic factors that surround and affect the survival and development of an organism or population

3. the totality of the surrounding conditions and elements in an individual

See also habitat and ecological niche