biodiversity vs diverseness

biodiversity and diverseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
biodiversity	Yes	No	No	No
diverseness	Yes	No	No	No

As nouns, diverseness is a hypernym of biodiversity; that is, diverseness is a word with a broader meaning than biodiversity:

biodiversity: the diversity of plant and animal life in a particular habitat (or in the world as a whole)
diverseness: noticeable heterogeneity

Other hypernyms of biodiversity include diversity, multifariousness, variety.

biodiversity (noun)	diverseness (noun)
the diversity of plant and animal life in a particular habitat (or in the world as a whole)	noticeable heterogeneity