Table 1

Split -split- plot analysis of variance of tested environmental conditions for measured traits and group of species.

Variables

Species

Shade

Fertilization

Disturbance

S×F

S×D

F×D

RGR_h

Invasive

0.012

0.001

0.471

0.016

0.964

0.334

Early sc.

0.169

<0.001

0.447

0.312

0.610

0.204

Late sc.

0.504

0.001

0.528

0.085

0.834

0.593

RSR

Invasive

0.161

<0.001

0.012

0.390

0.186

0.178

Early sc.

0. 962

0.018

0.762

0.461

0.588

0.097

Late sc.

0. 015

<0.001

0.066

0. 016

0.680

0.849

TLA

Invasive

0.065

0.007

0.017

0.084

0.559

0.215

Early sc.

0.156

0.001

0.297

0.067

0.770

0.898

Late sc.

0.017

0.001

<0.001

0.021

0.127

0.099

SLA

Invasive

< 0.001

0.168

0.115

0.249

0.023

<0.001

Early sc.

< 0.001

0.020

0.253

0.976

0.720

0.776

Late sc.

0.001

0.052

0.655

0.165

0.988

0.593

LWR

Invasive

0.012

<0.001

<0.001

0.021

0.383

0.965

Early sc.

0.184

<0.001

0.077

0.268

0.965

0.801

A_max

Late sc.

0.437

<0.001

<0.001

0.034

0.784

0.349

Invasive

0.710

0.043

0.168

0.450

0.897

0.986

Early sc.

0.110

0.407

0.041

0.600

0.573

0.417

Late sc.

0.588

0.005

0.008

0.055

0.243

0.553

A_maxw

Invasive

0.023

0.086

0.130

0.242

0.541

0.752

Early sc.

0.002

0.800

0.512

0.771

0.986

0.947

Late sc.

0.098

0.004

0.095

0.013

0.457

0.243

N_m

Invasive

0.836

<0.001

0.012

0.008

0.219

0.141

Early sc.

0.603

<0.001

0.459

0.002

0.101

0.371

Late sc.

0.037

<0.001

0.972

<0.001

0.773

0.548

PNUE

Invasive

0.253

0.213

0.171

0.398

0.048

0.107

Early sc.

0.629

0.090

0.029

0.257

0.634

0.213

Late sc.

0.056

0.037

0.023

0.120

0.777

0.426

N_a

Invasive

<0.001

0.006

0.018

0.007

0.445

0.957

Early sc.

<0.001

<0.001

0.479

<0.001

0.028

0.374

Late sc.

<0.001

<0.001

0.872

<0.001

0.812

0.654

Significant p values (p < 0.05) are presented in bold. Species are grouped by strategy: the invasive species is Acer negundo, early-successional native species are Salix alba and Populus nigra and late-successional native species are Fraxinus excelsior and Fraxinus angustifolia. Traits are: RGR_h relative growth rate in seedling height, RSR root/shoot ratio, TLA total leaf area, SLA specific leaf area, LWR leaf weight ratio, A_max light-saturated assimilation rate per unit leaf area, A_maxw light-saturated assimilation rate per unit leaf dry weight, N_m nitrogen content, N_a nitrogen content per unit leaf area and PNUE the photosynthetic nitrogen use efficiency.

Porté et al. BMC Ecology 2011 11:28   doi:10.1186/1472-6785-11-28