Other specialized branches of ecology include: • Chemical ecology, deals with the ecological role of biological chemicals used in a wide range of areas including defense against predators and attraction of mates; • Systems ecology and biogeochemistry which focus on the flow of energy and nutrients within and among ecological units;. Landscape Ecology: “Landscape ecology is concerned with spatial patterns in the landscape and how they develop, with an emphasis on the role of disturbance, including human impacts” (Smith and Smith). It is a relatively new branch of ecology, that employs Global Information Systems. Principles of Ecology Notes MODULE - 2 Ecological Concepts and Issues HABITAT AND ORGANISM Habitat is the physical environment in which an organism lives. Each organism has particular requirements for its survival and lives where the environment provides for those needs. The environmental requirement of an elephant would be a forest.
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