Ecosystem Dynamics and Succession Concepts

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Model that shows many interconnected food chains and pathways in which energy and matter flow thru an ecosystem

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Food web

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Total mass of living matter at each trophic level

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Biomass

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Process by which one community replaces another community because of changing abiotic and biotic factors

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Ecological succession

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Establishment in a community in an area of bare rock or bare sand which is no topsoil is present

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Primary succession

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Stable, mature, ecological community with little change in the composition of species

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Climax community

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Orderly change that occurs in a place where soil remains after a community of organisms has been removed

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Secondary succession

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Environmental factors such as storms and extreme heat or code that affects populations, regardless of their density

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Density independent factor

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Environmental factors such as predation, disease, and competition that depends on the number of members in the population per unit area

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Density dependent factor

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Movement of individuals away from a population

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Emigration

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Movement of individuals into a population

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Immigration