Percentages of the total variance in red-crowned crane occurrence data explained by plot, patch, and landscape variables at the second hierarchical level; a, b, c are unique effects of plot, patch and landscape variables, respectively; d, e, f, g are fractions indicating their combined effects.

<p>Percentages of the total variance in red-crowned crane occurrence data explained by plot, patch, and landscape variables at the second hierarchical level; a, b, c are unique effects of plot, patch and landscape variables, respectively; d, e, f, g are fractions indicating their combined effects.</p

The landscape index of red-crowned crane suitable habitat in the YRDNR.

<p>North: northern part of the YRDNR; South: southern part of the YRDNR; Total: the entire reserve; CA: total suitable habitat area; PLAND: proportion of suitable habitat area; AREA_MN: average patch area of suitable habitat; PG: protection gap area in the YRDNR; PPG: percentage of protection gap area with total suitable habitat in the YRDNR.</p><p>The landscape index of red-crowned crane suitable habitat in the YRDNR.</p

Percentages of the total variance in red-crowned crane occurrence data explained by habitat and spatial variables at the first hierarchical level.

<p>(a) The variance explained by habitat variables; (b) the variance explained by spatial variables; and (c) the variance explained by combination of habitat and spatial variables.</p

Habitat suitability map and protection gap for red-crowned cranes used by the final autologistic model.

<p>Red: suitable habitat for the red-crowned crane in the core zone of the YRDNR. Green: suitable habitat for the red-crowned crane outside the core zone of the YRDNR. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Gray: buffer zones of the YRDNR. Dark gray: core zones of the YRDNR.</p

Location of the Yellow River Delta Nature Reserve in China.

<p>'Absence' and 'presence' indicate the absence and presence sampling points of red-crowned cranes. Blue: Yellow River in the YRDNR. Light gray: experimental zones of the YRDNR. Light green: buffer zones of the YRDNR. Dark green: core zones of the YRDNR.</p

Variable parameters for the final autologistic model with a neighborhood size of 8 km.

<p>**: p-value<0.01;</p><p>***: p-value <0.001</p><p>Variable parameters for the final autologistic model with a neighborhood size of 8 km.</p