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


RGRh

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

Amax

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

Amaxw

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

Nm

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

Na

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: RGRh relative growth rate in seedling height, RSR root/shoot ratio, TLA total leaf area, SLA specific leaf area, LWR leaf weight ratio, Amax light-saturated assimilation rate per unit leaf area, Amaxw light-saturated assimilation rate per unit leaf dry weight, Nm nitrogen content, Na 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

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