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Ecosystems Encyclopedia Entry 1782667686

** Ecosystems are complex networks of living organisms and non-living components that interact and depend on each other in a specific environment. **CONTENT:** ### Overview An **ecosystem** is a dynamic and interconnected system that consists of living organisms (plants, animals, and microorganisms) and non-living components (air, water, soil, and sunlight) that interact and depend on each other in a specific environment. Ecosystems can range from small, localized systems like a coral reef or a forest, to large, global systems like the ocean or the atmosphere. The interactions within an ecosystem are governed by the principles of **ecology**, which is the study of the relationships between living organisms and their environment. Ecosystems provide essential services to humans, including **air and water filtration**, **soil formation**, **climate regulation**, and **biodiversity conservation**. They also support the production of **food**, **fiber**, and **fuel**, and provide **recreation** and **tourism** opportunities. However, human activities like **deforestation**, **pollution**, and **climate change** are threatening the health and resilience of ecosystems worldwide. ### History/Background The concept of ecosystems has been around for centuries, with ancient civilizations recognizing the interconnectedness of living organisms and their environment. However, it wasn't until the 19th century that the term "ecosystem" was coined by **Tansley** in 1935. Tansley, a British ecologist, defined an ecosystem as "the complex of living and lifeless components of the biotic environment." Since then, the study of ecosystems has evolved significantly, with advances in **ecological theory**, **remote sensing**, and **computer modeling**. ### Key Information Ecosystems can be classified into several types, including: * **Terrestrial ecosystems**: forests, grasslands, deserts, and tundras * **Freshwater ecosystems**: rivers, lakes, and wetlands * **Marine ecosystems**: coral reefs, estuaries, and open ocean * **Atmospheric ecosystems**: the atmosphere and its interactions with living organisms Ecosystems are characterized by their **structure**, **function**, and **processes**. Structure refers to the physical components of an ecosystem, such as plants, animals, and soil. Function refers to the activities that occur within an ecosystem, such as photosynthesis and decomposition. Processes refer to the interactions between living organisms and their environment, such as nutrient cycling and energy flow. ### Significance Ecosystems are essential for human well-being and the health of the planet. They provide essential services, support biodiversity, and regulate the climate. However, human activities are threatening the health and resilience of ecosystems worldwide. **Conservation** and **sustainable management** of ecosystems are critical to maintaining their services and supporting human well-being. **INFOBOX:** - Name: Ecosystems - Type: Ecological system - Date: 1935 (coined by Tansley) - Location: Global - Known For: Providing essential services to humans, supporting biodiversity, and regulating the climate **TAGS:** Ecosystems, Ecology, Biodiversity, Conservation, Sustainable management, Climate regulation, Air and water filtration, Soil formation, Food production, Fiber production, Fuel production, Recreation, Tourism.