Table 4 Range expansion and founder effect test results for Tristaniopsis

From: Habitat preference differentiates the Holocene range dynamics but not barrier effects on two sympatric, congeneric trees (Tristaniopsis, Myrtaceae)

Species

Lineage

Latitude

Longitude

Altitude (m)

q

d (km)

R 2

P

Tristaniopsis collina

Shield Volcano-North (+Barrington)

−28.5697

151.6017

670

0.0009

5.4624

0.936

<0.000

Shield Volcano-North (−Barrington)

−28.7895

152.3171

540

0.0008

6.6840

0.886

<0.000

Central (+Barrington)

−32.3666

150.3608

220

0.0010

5.1637

0.459

0.446

Central (−Barrington)

−33.2605

150.8189

290

0.0023

2.2337

0.967

<0.000

South

−36.5117

149.9736

140

0.0001

32.5417

0.411

<0.000

Tristaniopsis laurina

North

−28.9402

153.5230

5

0.0002

20.6609

0.712

<0.000

Central

−33.9326

151.0987

20

0.0002

28.2944

0.222

0.648

South

−36.5698

149.8996

215

0.0005

10.9072

0.428

<0.000

  1. Latitude, longitude and altitude indicate location of predicted origin of range expansion for each lineage. q is the directionality index, which positively increases with distance from origin of range expansion and approaches zero with time since expansion and/or migration between demes. d is the effective founder distance in km (the deme size for which Ne is reduced by 1% during a founder event) and a low value indicates a strong founder effect. Rsq of the regression of q versus difference in distance from origin. Bonferoni corrected P
  2. P < 0.001
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