. 2014 Dec 20;115(3):343–351. doi: 10.1093/aob/mcu248

Table 2.

Results of tests for the comparison of predicted EC values for genera including known halophytes versus those not including halophytes, and for the correlation between salinity and alkalinity conditions in Australian grass genera

Alternative hypothesis	Variable	Parametric	Phylogeny-corrected
Alternative hypothesis	Variable	Parametric	Complete	Calibrated
Genera with known halophytes are found in conditions of higher predicted salinity than genera without known halophytes	Median	t₁₈₆ = 3·25**, R² = 0·04	t₂₂₄ = 3·03**, R² = 0·04	t₁₄₄ = 2·45*, R² = 0·04
	UQ	t₂₀₉ = 3·89**, R² = 0·06	t₁₄₄ = 4·44**, R² = 0·08	t₁₄₄ = 2·46*, R² = 0·04
Genera found in conditions of high predicted salinity tend to be found in conditions of high predicted alkalinity	Median	t₂₃₂ = 11·18**, R² = 0·35	t₁₉₈ = 12·60**, R² = 0·28	t₁₁₆ = 9·02**, R² = 0·53
	UQ	t₂₃₂ = 15·60**, R² = 0·51	t₁₄₄ = 16·68**, R² = 0·56	t₁₀₉ = 13·75**, R² = 0·70
Genera with known halophytes found in conditions of high predicted salinity tend to be found in conditions of high predicted alkalinity	Median	t₆₉ = 6·71**, R² = 0·40	t₅₅ = 3·96**, R² = 0·35	t₄₅ = 6·22**, R² = 0·62
	UQ	t₆₉ = 9·05**, R² = 0·54	t₅₅ = 5·96**, R² = 0·56	t₄₃ = 10·33**, R² = 0·72

Alternative hypotheses are listed in the first column. The variable tested (median or UQ) for salinity and/or alkalinity of a given taxon is given in the second column. Tests for each hypothesis include a parametric and two phylogeny-corrected analyses. The phylogeny-corrected analyses were performed on a complete genus-level phylogenetic tree of grasses (Complete column) and a smaller, time-calibrated phylogenetic tree (Calibrated column) from a previous study (Bouchenak-Khelladi et al., 2010); t-statistic and R² values are reported for each test. Asterisks indicate statistical significance at the *0·05 level and **0·005 level. Significant statistics support the alternative hypotheses.