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Table 4 Analysis of log-response ratios \(\left( {{ \log }\frac{\text{treatment biomass }}{\text{control biomass}}} \right)\) for treatment effects in spring 2010 and summer 2009 (see Fig. 3). See Table 2 for explanation of symbols

From: No consistent effect of plant species richness on resistance to simulated climate change for above- or below-ground processes in managed grasslands

  df Springa Summer
SS F SS F
Explo 2 0.265 0.347n.s. 0.392 2.02n.s
LUT 2 0.250 0.327n.s. 0.260 1.34n.s
Species richnessb 1 1.77 4.77* 0.0177 0.182n.s
Explo:LUT 4    0.342 0.883n.s
Explo:species richness 2    0.0544 0.281n.s
LUT:species richness 2    0.764 3.94*
Explo:LUT:species richness 4    1.125 2.90*
Residuals   9.03 (df = 26) 2.42 (df = 25)
  1. Models were manually simplified until all model terms were significant. Design effects were always kept in the model. SS were computed sequentially (type I). LUT and Explo refer to land-use type and exploratory region, respectively
  2. aSpecies richness was modelled as log(species richness) in the spring analysis. Using a linear scale yielded similar, but non-significant effects of species richness
  3. bEstimate for the spring effect of log(species richness): 0.792 ± 0.363; partial model R 2adj  = 0.036