Results of the mixed-effects model analysis of the yields of individual species across the experimental water table depth gradient.

<p>Undetectable interactions with soil type have been removed from the model while the results are essentially averaged across the two years by including year as a random factor. The curves are slopes from the mixed-effects model with their 95% confidence intervals (shaded). Note that <i>F. pratensis</i> and <i>P. palustris</i> were present only in 1952.