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Table 3 Heatmap of the distribution of studies into taxa and outcomes categories

From: Existing evidence on the potential of soils constructed from mineral wastes to support biodiversity: a systematic map

  1. The total number of studies is first indicated (brown shading), then the number of studies with data for quantitative and/or narrative synthesis (orange shading), and then the number of studies with data for quantitative and/or narrative synthesis and with comparison with a reference soil (yellow shading). Some outcomes do not apply to certain taxa (n/a)