Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Biodiversity is regular. It follows the -ies Conversion rule.
Use plural verbs: "The biodiversities are ready" (not "is ready").
Yes. The plural biodiversities is standard across all English variants.
The word biodiversity follows the standard English pluralization rule. When forming the plural, biodiversity becomes biodiversities. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why biodiversity becomes biodiversities helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using biodiversities in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The biodiversities are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.