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Table 1 Summary of Mann-Whitney U test comparing human pressure level in different regions

From: Reducing human pressure on farmland could rescue China’s declining wintering geese

Species Land cover type Location Mean 95% CIs N U p
TBG Farmland YRF 17.593 17.548–17.638 50,278 1.53E+ 10 < 0.001
NCP 11.286 11.267–11.304 372,100
Wetland/grass YRF 13.174 13.069–13.279 10,456 2.96E+ 9 < 0.001
NCP 9.146 9.131–9.160 390,058
GWFG Farmland YRF 16.955 16.913–16.998 45,441 1.67E+ 10 < 0.001
NCP 12.814 12.797–12.831 492,559
Wetland/grass YRF 12.881 12.790–12.972 11,253 1.93E+ 8 < 0.001
NCP 9.824 9.804–9.845 252,385
  1. The Northeast China Plain (NPC) stopover site has a significantly lower level of human pressure on the farmland and wetland/grass, in comparison to the Yangtze River Floodplain (YRF) wintering site. Human pressure refers to the standardized human footprint with a range of 0–50. TBG: tundra bean goose (Anser serrirostris); GWFG: greater white-fronted goose (A. albifrons). CIs: confidence intervals; N: sample size