Definition of Biotope:
(1) The smallest geographical unit of the biosphere or of a habitat that can be delimited by convenient boundaries and is characterized by its biota.
(2) A region that has a characteristic set of environmental conditions and consequently a particular type of fauna and flora.
This is the common definition for Biotope, other definitions can be discussed in the article
The physical habitat with its biological community; a term which refers to the combination of the physical environment (habitat) and its distinctive assemblage of conspicuous species 
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