biota vs assemblage

biota and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
biota	Yes	No	No	No
assemblage	Yes	No	No	No

As nouns, assemblage is a hypernym of biota; that is, assemblage is a word with a broader meaning than biota:

Other hypernyms of biota include accumulation, aggregation, collection.

biota (noun)	assemblage (noun)
all the plant and animal life of a particular region	the social act of assembling
	a system of components assembled together for a particular purpose
	a group of persons together in one place
	several things grouped together or considered as a whole