| TERM | CHARACTERISTICS | TRANSLATION |
| Ecosystem | Noun | Ecosistema |
| Biocenosis | Noun (singular) | Biocenosis |
| Aquatic | Noun | Acuático |
| Biocenoses | Noun (plural) | Biocenosis |
| Hibernate | Noun | Hibernar |
| Biotope | Noun | Biotope |
| Adaptation | Noun | Adaptación |
| Alga | Noun (singular) | Alga |
| Algae | Noun (plural) | Algas |
| Nocturnal | Adjective | Nocturno |
| Migrar | Verb | Migrag / emigrar |
| Waterproof | Adjective | Impermeable, resistente al agua |
| Intraspecific | Adjective | Intraespecífico |
| Cooperative | Adjective | Cooperativo |
| Hierarchical | Adjective | Jerárquico |
| Predator | Noun | Depredador |
| Prey | Noun | Presa |
| Symbiosis | Noun | Simbiosis |
| Trophic | Adjective | Trófico |
| Decomposer | Noun | Descomponedor |
| Chain | Noun | Cadena |
| Web | Noun | Red |
| Arrow | Noun | Flecha |
| Biome | Noun | Bioma |
| Tundra | Noun | Tundra |
| Taiga | Noun | Taiga |
| Steppe | Noun | Estepa |
| Savannah | Noun | Savana |
| Abiotic factors | Noun | Factores abióticos |
| Biotic factors | Noun | Factores bióticos |
| Ecosphere | Noun | Ecosfera |
| Commensalism | Noun | Comensalismo |
| Mutualism | Noun | Mutualismo |
| Producers | Noun | Productores |
| Consumers | Noun | Consumidores |
| Continental shelf | Noun | Plataforma continental |
| Seashore | Noun | Orilla del mar |
| Shallow | Adjective | Superficial |
| Neritic zone | Noun | Zona nerítica |
| Pelagic zone | Noun | Zona pelágica |
| Bathyal zone | Noun | Zona batial |
| Abyssal zone | Noun | Zona abisal |
| Still water | Noun | Agua estancada |
| Wetland | Noun | Humedal |
| Biome | Noun | Bioma |
| Tundra | Noun | Tundra |
| Taiga | Noun | Taiga |
| Deciduous forest | Noun | Bosque caducifolio |