Skip to main content

Table 1 Sister species characteristics in Isolona and Monodora as well as results from the PCA and, the similarity and background tests.

From: Little ecological divergence associated with speciation in two African rain forest tree genera

     Mann-Whitney U    Identity test Background test (1)
Species pair % geographical overlap Smaller Range species MRCA age (95% confidence interval) PC1 PC2 PC3 D I D I D I
Isolona             
pleurocarpa-zenkeri 19.6 pleurocarpa 4.5 (1.4-7.9) * NS *** 0,25 0,50 *** *** more */more * more */more **
dewevrei-thonneri 8.9 dewevrei 2.5 (0.4-4.8) *** NS *** 0,41 0,63 *** *** NS/NS NS/NS
heinsenii-linearis 32 linearis 2.6 (0.7-4.8) * NS NS 0,40 0,62 *** *** less ***/NS less ***/more *
campanulata-cooperi 16 cooperi 2.8 (0.9-5.2) NS * NS 0,53 0,69 *** *** NS/more * NS/NS
congolana-hexaloba 12.6 congolana 6 (2.7-9.8) *** ** ** 0,44 0,60 *** *** NS/NS NS/NS
Monodora             
carolinae-stenopetala 0 no overlap 2.6 (0.9-4.4) NS ** ** 0,21 0,49 *** *** *** more/NS *** more/NS
hastipetala-junodii 89.3 hastipetala 1.5 (0.2-3.2) NS * NS 0,05 0,35 *** *** less */less *** less */less ***
laurentii-myristica 14.3 laurentii 2.4 (0.6-4.8) * NS NS 0,55 0,70 *** *** more ***/more *** more ***/more ***
myristica-undulata 35.7 undulata 1.6 (NE) ** *** *** 0,43 0,64 *** *** NS/NS more */NS
crispata-tenuifolia 43 crispata 3.8 (NE) NS *** NS 0,46 0,66 *** *** more ***/more * more ***/more *
laurentii-undulata 0 no overlap 2.4 (0.6-4.8) NS ** ** 0,23 0,50 *** *** more ***/more *** more ***/more *
  1. NE = not estimated
  2. *** P < 0,001
  3. ** P < 0,01
  4. * P < 0,05
  5. NS not significant
  6. 1) the first value corresponds to the test of the first species vs the background of second, and then vice versa