Ecological Archives E088-088-A3

Hong Qian, Peter S. White, and Jong-Suk Song. 2007. Effects of regional vs. ecological factors on plant species richness: an intercontinental analysis. Ecology 88:1440–1453.


Appendix C. Analysis of covariance of log10-transformed angiosperm species richness with region as main effect and log10 (area), maximum elevation, and climate variables as covariates, using 63 floras of < 104 km2 with the means of elevations and temperatures being comparable between EAS and ENA (Model: R2 = 0.631).

Source

Sum of squares

df

F ratio

P

Region

0.088

1

13.506

0.0005

Log 10 area

0.227

1

34.955

<0.0001

Elevation

0.012

1

1.810

0.1839

MAT

0.052

1

7.956

0.0066

AET

0.021

1

3.298

0.0747

SRAIN

0.047

1

7.266

0.0093

Error

0.364

56

   

   Note: MAT = mean annual temperature, SRAIN = summer precipitation, and AET = actual evapotranspiration.



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