Table 3 Regression equations for plant diversity based on hyperspectral indices in central Hunshandak Sandland, Northern China.

From: Assessment of plant species diversity based on hyperspectral indices at a fine scale

Diversity indices

Regression equation

R2

Adjusted R2

RMSE

Simpson

Y = −4.873(Rg − Ro)/(Rg + Ro) + 0.509λb + 1.026Rg/Ro − 270.43

0.710

0.677

0.024

Pielou

Y = −0.699(Rg − Ro)/(Rg + Ro) + 0.244

0.403

0.382

0.013

Shannon-Wiener

Y = −9.697(Rg − Ro)/(Rg + Ro) + 0.974λb + 2.06Rg/Ro − 517.113

0.665

0.626

0.113

Margalef

Y = 2.984SDb + 21.595(Rg − Ro)/(Rg + Ro) − 9.176

0.554

0.539

0.455

Gleason

Y = 21.413SDb + 91.277(Rg − Ro)/(Rg + Ro) + 37.862

0.563

0.547

8.507

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