Figure 4. Variation in the Land Use Intensity (LUI) threshold depending on temporal changes in land use. Land use thresholds for diversities and ecosystem functions on plots where LUI had recently increased (intensification, blue line and dots) or decreased (extensification, orange line and dots). For diversity the threshold was not affected by the direction of recent changes in LUI but ecosystem functions had different thresholds depending on whether LUI had recently increased or decreased, suggesting hysteresis and the presence of a critical transition between two ecosystem states. Top left subplot shows the threshold response of plant diversity to LUI, which is the same for plots where LUI had increased or decreased compared to the previous year. Top right subplot shows hysteresis for the threshold response of plant shoot biomass, where the threshold is different on plots where LUI had increased compared to the previous year (blue) or where it had decreased (yellow). ** p < 0.01, *** p < 0.05.