Ecosystem: a system formed by the interaction of a community of organisms with each other and with the chemical and physical factors making up their environment.
(a system; formed; by the interaction of a community of organisms with each other and with the chemical and physical factors making up their environment) (the chemical and physical factors; making up; their environment)
a system the chemical and physical factors
formed making up
by the interaction of a community of organisms with each other and with the chemical and physical factors making up their environment
their environment