Results of statistical analyses for testing the relationship between diversity indices and log VP/BP.

<p>Four different models were used: linear (LM), quadratic (QM), cubic (CM), and additive (AM). Bold characters indicate the model with the lowest Akaike Information Criterion (AIC) for each diversity index. <i>S</i>: OTU richness, <i>E</i>: Evenness, <i>H</i>: Shannon-Wiener diversity index, <i>D</i>: Simpson's index of diversity.</p><p>1. Models were as follows: linear, Y∼a+ bX, quadratic, Y∼a+b (X–c)², cubic, Y∼a+ bX + cX² + dX³, additive, Y∼s (X), where X and Y are log VP/BP and one of the four diversity indices, respectively; a, b, c and d are parameters.</p><p>2. NS p>0.05, *0.01