human ecology vs sociology

human ecology and sociology both are nouns.

Word	Noun	Adjective	Verb	Adverb
human ecology	Yes	No	No	No
sociology	Yes	No	No	No

As nouns, sociology is a hypernym of human ecology; that is, sociology is a word with a broader meaning than human ecology:

human ecology: the branch of sociology that studies the characteristics of human populations
sociology: the study and classification of human societies

human ecology (noun)	sociology (noun)
the branch of sociology that studies the characteristics of human populations	the study and classification of human societies