Research Article

Spatial Differentiation and Elements Influencing Urban Resilience in the Middle Reaches of the Yangtze River under the COVID-19 Pandemic

Table 4

Interpretation table for landscape metrics.

Landscape metricsEcological significance

Patch density (PD)It reflects the degree of landscape fragmentation; a higher numerical value indicates a smaller patch and a higher degree of fragmentation.
Aggregation index (AI)It reflects the aggregation degree of the same type of patches; a higher numerical value indicates a greater aggregation degree of similar landscape types.
Interspersion juxtaposition index (IJI)It reflects the overall interspersion juxtaposition of the same patch; a low numerical value implies that this patch is only adjacent to a few other types of patches.
Patch cohesion index (COHESION)It reflects the natural connectivity of patches; the higher the numerical value, the better the connectivity of the landscape type.
Contagion index (CONTAG)It reflects the agglomeration degree or extension trend of different landscape types, including the spatial information; a high numerical value implies that good connectivity is formed for a specific dominant landscape type.
Shannon’s diversity index (SHDI)It reflects the heterogeneity and complexity of landscape types; a higher numerical value indicates more abundant land use, which tends to be evenly distributed.

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