生態系（せいたいけい、seitaいkeい）
- ecosystem

The Japanese word 生態系生態系, read as せいたいけい, refers to an ecosystem. An ecosystem is a community of living organisms (plants, animals, microorganisms) interacting with each other and with their non-living environment (air, water, soil, sunlight) in a specific area. It encompasses the relationships between these organisms and the flow of energy and nutrients within the system. The word emphasizes the interconnectedness and interdependence of all components within a given environment. The 生態系生態系 concept covers a wide range of scales, from a small pond to a vast forest or even the entire planet.

⚫︎その森には多様な生態系生態系があります。 Translation: There are diverse ecosystems in that forest. ⚫︎生態系生態系のバランスを保つことは重要です。 Translation: Maintaining the balance of the ecosystem is important. ⚫︎地球の生態系生態系は危機に瀕しています。 Translation: The Earth's ecosystems are in danger.

This word is used in various contexts related to biology, environmental science, and conservation. You would use it when discussing: ⚫︎The different types of habitats and their associated organisms. ⚫︎Environmental issues such as pollution, deforestation, and climate change, and their impact on the environment. ⚫︎The importance of biodiversity and conservation efforts. ⚫︎When talking about the relationships between living creatures and their environment.

The word is typically written in kanji as 生態系生態系. The reading uses hiragana せいたいけい. There are no other common ways to write this word. The okurigana is standard.

There aren't direct synonyms in Japanese that fully capture the multifaceted meaning of 生態系. However, depending on the context, you could use these similar words: ⚫︎環境（かんきょう） – environment ⚫︎自然（しぜん） – nature ⚫︎自然界（しぜんかい） – the natural world

There is no direct antonym for 生態系生態系. However, you could consider words related to human-made environments, such as: ⚫︎人工環境（じんこうかんきょう） – artificial environment ⚫︎都市（とし） – city

熱帯雨林の生態系生態系は、多くの生物種を支えています。 ・Translation: The rainforest ecosystem supports many species of living things. ・Explanation: This sentence explains how the rainforest environment helps different species.

この川の生態系生態系は、汚染によって深刻な影響を受けています。 ・Translation: The ecosystem of this river is severely affected by pollution. ・Explanation: This sentence describes an impact of pollution on an ecosystem.

The word 生態系生態系 is a compound word. It is formed from: ⚫︎生態（せいたい） - ecology, or the way of life of living things. ⚫︎系（けい） - system, or a related group of things. Therefore, 生態系生態系 literally means "ecological system". The term was created to describe the complex interconnections of life and the environment.