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Ecosystems Encyclopedia Entry 1779460383

** Ecosystems are complex networks of living organisms and non-living components that interact and depend on each other, forming a delicate balance that sustains life on Earth. **CONTENT:** ## Overview An **ecosystem** is a self-regulating system consisting of living organisms (plants, animals, and microbes) and non-living components (air, water, soil, and sunlight) that interact and depend on each other. These interactions create a dynamic balance that sustains life on Earth. Ecosystems can range from small, localized systems like a coral reef or a forest to vast, global systems like the atmosphere or the ocean. Each ecosystem has its unique characteristics, such as climate, geography, and biodiversity, which shape the interactions between its components. Ecosystems are often classified into different types, including terrestrial (land-based), freshwater, and marine ecosystems. Terrestrial ecosystems include forests, grasslands, and deserts, while freshwater ecosystems include rivers, lakes, and wetlands. Marine ecosystems include coral reefs, estuaries, and open ocean. Human activities, such as deforestation, pollution, and climate change, can disrupt the balance of ecosystems, leading to loss of biodiversity and ecosystem degradation. ## History/Background The concept of ecosystems has been around for centuries, with ancient civilizations recognizing the interconnectedness of living and non-living components in the natural world. However, it wasn't until the 19th century that the term "ecosystem" was coined by British ecologist Arthur Tansley in 1935. Tansley defined an ecosystem as "the whole complex of a community of living organisms and their environment." Since then, the study of ecosystems has become a major focus of ecology, with scientists working to understand the complex interactions within ecosystems and the impact of human activities on these systems. ## Key Information Ecosystems are characterized by several key features, including: * **Biodiversity**: The variety of different species that inhabit an ecosystem, including plants, animals, and microbes. * **Energy flow**: The transfer of energy from one trophic level to another, from producers (plants and algae) to consumers (animals and microbes). * **Nutrient cycling**: The movement of nutrients through an ecosystem, from one organism to another, and from one compartment to another. * **Disturbance**: The impact of natural or human-induced events, such as storms, fires, or pollution, on ecosystem structure and function. ## Significance Ecosystems play a critical role in sustaining life on Earth, providing essential services such as: * **Air and water purification**: Ecosystems help to clean the air and water by removing pollutants and excess nutrients. * **Climate regulation**: Ecosystems help to regulate the climate by storing carbon, moderating temperature, and influencing weather patterns. * **Soil formation**: Ecosystems help to form and maintain soil through the activities of plants and microbes. * **Food production**: Ecosystems provide a source of food for humans and other animals. The loss of ecosystem services can have significant impacts on human well-being, including: * **Loss of biodiversity**: The loss of species and ecosystem function can lead to reduced ecosystem resilience and increased vulnerability to disturbance. * **Decreased food security**: The loss of ecosystem services can reduce the availability of food and increase the risk of famine. * **Increased greenhouse gas emissions**: The loss of ecosystem services can lead to increased greenhouse gas emissions and climate change. **INFOBOX:** - Name: Ecosystem - Type: Ecological system - Date: 1935 (coined by Arthur Tansley) - Location: Global - Known For: Complex networks of living and non-living components that interact and depend on each other. **TAGS:** Ecosystems, ecology, biodiversity, energy flow, nutrient cycling, disturbance, air and water purification, climate regulation, soil formation, food production, loss of biodiversity, decreased food security, increased greenhouse gas emissions.