* Terrestrial refers to land-based ecosystems (forests, grasslands, deserts).
* Aquatic refers to water-based ecosystems (oceans, lakes, rivers).
Alternatives:
* Biomes: This term is often used to describe large-scale ecosystems with similar climate, vegetation, and animal life, regardless of whether they are terrestrial or aquatic.
* Earth's ecosystems: This is a broad term that encompasses all types of ecosystems, including terrestrial and aquatic.
* Planet's ecosystems: This emphasizes the global nature of all ecosystems.
* Natural ecosystems: This can be used if you want to exclude man-made ecosystems.
It really depends on the context of your writing. Think about what you want to emphasize and choose the most appropriate term.
