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. Author manuscript; available in PMC: 2013 Jan 30.
Published in final edited form as: Science. 2012 Jan 13;335(6065):214–218. doi: 10.1126/science.1215442

Figure 1.

Figure 1

Relationship between perennial plant species richness and ecosystem multifunctionality (A) measured in a global survey of drylands. Similar relationships for carbon (B), nitrogen (C) and phosphorus (D) cycling are shown. Red and green lines are the fitted lines from ordinary least squares (OLS) and spatial autoregressive (SAR) regressions, respectively. Results of regressions are as follows: A) OLS, R2 = 0.030, P = 0.009; SAR, R2 = 0.022, P = 0.027; B) OLS, R2 = 0.029, P = 0.011; SAR, R2 = 0.022, P = 0.027; C) OLS, R2 = 0.018, P = 0.044; SAR, R2 = 0.014, P = 0.082; and D) OLS, R2 = 0.032, P = 0.008; SAR, R2 = 0.016, P = 0.061.