IB EVSS Topic 2.5 mastery assessment

Define ecosystem

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Construct dichotomous keys.

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Different biomes

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Sampling strategies to measure biotic and abiotic factors and their change in space, along an environmental gradient, over time, through succession, or before and after a human impact (for example, as part of an EIA).

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Methods in investigating with accuracy and reliability.

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Methods to estimate the biomass and energy of trophic levels in a community by measuring the dry mass, controlled combustion and extrapolation from samples. Data from these methods can be used to construct ecological pyramids.

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Methods for estimating the abundance of non-motile organisms using quadrats for making actual counts, measuring population density, percentage cover and percentage frequency.

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Application of the Lincoln index

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Application of Simpson diversity index

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