Novelist writes, in a way, for well-adapted groups

• Groups within species
• Jaguars welcoming care of species
• Groups that have adapted to their environments
• Adaptable subspecies
• Distinct groups of species populations
• Groups adapted to their environments
• Subspecies adapted to their environments
• Subspecies especially adapted to their environments

Wiktionary Word definitions in Wiktionary
n. (plural of ecotype English)