* As a general term: "Biomes" is not capitalized when used as a general term referring to large-scale ecosystems. Example: "The world is divided into different biomes, each with its own unique flora and fauna."
* As a specific name: If "biomes" is part of a specific name, like a specific biome, it would be capitalized. Example: "The Amazon Rainforest is a tropical rainforest biome."
Here are some examples:
* Capitalized: The Taiga biome is known for its cold temperatures and coniferous forests.
* Not Capitalized: There are many different types of biomes around the world.
I hope this helps!