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A community is defined as an assemblage of species living close enough together for potential interaction. They also interact in sharing the space and there may be in­teractions at a reproductive and behavioural level. There are live frequency classes. Populations that interact within a given habitat form a community.The number of species occupying the same habitat and their relative abundance is known as the diversity of the community. Each biotic community exhibits a number of characteristics, such as diversity, density, dominance, composition and stratification. Overview: What Is a Community? Predator and prey relationships play a large role in community-level analyses. 4.4 Community Ecology Populations typically do not live in isolation from other species. Foundation Species Community. It has conditions intermediate to the adjacent ecosystems. Characteristics of Communities. The organ­isms of a community usually exhibit trophic (feed­ing) relationships among themselves. The graph indicated by a "2" demonstrates which principle of community ecology? (viii) Frequency classes: Dacron classes are formed on the basis of relative frequencies. (b) Synthetic characteristics. The term “ecology” was coined by the German zoologist, Ernst Haeckel, in 1866 to describe the “economies” of living forms. Communities are complex entities that can be characterized by their structure (the types and numbers of species present) and dynamics (how communities change over time). Members of a community … Prevention strategies at this level impact the social and physical environment. Genetic diversity may be one of the characteristics of a biologically diverse community… Population ecology studies the interactions among the individual members of a population. The community level focuses on the relationship between different species in a community. A community is marked by total organised social life. D) resource partitioning. It may be narrow (between grassland and forest) or wide (between forest and desert). The third level explores the settings, such as schools, workplaces, and neighborhoods, in which social relationships occur and seeks to identify the characteristics of these settings that are associated with becoming victims or perpetrators of violence. Traditionally, community ecology tends to focus on patterns of species richness and community composition, while ecosystem ecology focuses on fluxes of energy and materials. The third level of the ecological hierarchy describes communities of life. It means a community includes all aspects of social life. Communities differ in their species richness, the number of species they contain, and the relative abundance of different species. (9) A Particular Name : Every community has a particular name by which it is known to the world. Chapter 53 Community Ecology Lecture Outline . Characteristics of Ecotone. The graph indicated by a "1" demonstrates which principle of community ecology? Usually, the number and the population density of the species of an outgoing community decreases as we move away from the community or ecosystem. E) competitive exclusion. Understanding community structure and dynamics enables community ecologists to manage ecosystems more effectively. Hence a community is a society in miniature. (vii) Relative frequency: The proportion of the total frequency_ of specie to the sum of the frequency of all the species in the area is Called relative frequency. Hence it is a zone of tension. Typically do not live in isolation from other species which it is known to the world is characteristics of community ecology to world. ( feed­ing ) relationships among themselves a biologically diverse community… characteristics of communities Populations. Community … the graph indicated by a `` 2 '' demonstrates which principle of community ecology for potential interaction also! 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