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Ecology is a central concept in Environmental Anthropology, helping to understand how human societies interact with their environments. It provides a scientific framework for examining the relationships between organisms, including humans, and their physical surroundings. The basic concepts of ecology are foundational in analyzing environmental adaptation, resource use, sustainability, and the impacts of human behavior on ecosystems. 1. Ecosystem An ecosystem is a community of living organisms interacting with one another and with their non-living environment (soil, water, air, sunlight). Ecosystems can range from small-scale ponds to large-scale forests or deserts. Each ecosystem is composed of biotic components (plants, animals, microorganisms) and abiotic components (temperature, moisture, minerals). In Environmental Anthropology, the concept of the ecosystem is used to study how human cultural practices fit into larger environmental systems and how these systems are altered by human activity. 2. Biotic and Abiotic Components Biotic components include all living things within an ecosystem – plants, animals, bacteria, fungi – that interact with one another. Abiotic components are the non-living physical and chemical factors such as sunlight, temperature, precipitation, soil, and water. Understanding how biotic and abiotic factors interact is essential for anthropologists examining human adaptation and environmental management practices. For example, the availability of water (abiotic) can influence agricultural strategies and social organization (biotic behavior). 3. Habitat and Niche A *habitat* refers to the physical environment in which a species lives, while a *niche* is the role or function a species plays in an ecosystem, including how it obtains its resources and interacts with other organisms. In anthropology, these concepts are extended to human populations, where human habitats can be natural or built environments, and cultural practices define the niche. For instance, pastoral nomads in arid regions have a distinct ecological niche involving animal herding and mobility strategies adapted to sparse resources. 4. Food Chain and Food Web A *food chain* is a linear sequence that shows how energy and nutrients flow from one organism to another. A *food web* _______ ____ ____ _________ __________ ________ ___ ________.
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