Figure alterations in precipitation (weekly sums) and volumetric soil water content (vol.%) (weekly mean) for the pre-exposures ‘ambient control’, ‘drought’, ‘heavy rain’




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APPENDIX



Figure S1. Alterations in precipitation (weekly sums) and volumetric soil water content (vol.%) (weekly mean) for the pre-exposures ‘ambient control’, ‘drought’, ‘heavy rain’, and ‘regular watering’ in the years 2005 to 2010 at the EVENT-I experimental site. The annual precipitation sum is provided for each year. Grey shaded areas indicate the duration of each pre-exposure manipulation.


Figure S2. Tissue die-back of heath and grassland plant communities from harvest one. Displayed are the mean percentages over all sampling dates and the standard errors. n. s. = not significant.



Figure S3. Aboveground biomass (g m-2) of heath and grassland plant communities from harvest one. Displayed are the means over all sampling dates and the standard errors. n. s. = not significant.




Figure S4. Tissue die-back of plant species in heath and grassland communities from harvest one. Displayed are the mean percentages over all sampling dates and the standard errors. n. a. = not available; n. s. = not significant.



Figure S5. Aboveground biomass (g m-2) of plant species in heath and grassland communities from harvest one. The lower case letters represent significant differences as revealed by the post -hoc test. Displayed are the means over all sampling dates and the standard errors. n. a. = not available; n. s. = not significant.




Figure S6. Aboveground biomass (g m-2) of plant species in heath and grassland communities from harvest 2-8. The lower case letters represent significant differences as revealed by the post -hoc test. Displayed are the means over all sampling dates and the standard errors. n. a. = not available; n. s. = not significant.


Figure S7. Ratio of reproductive to total biomass of Holcus lanatus from harvest 2-8. The lower case letters represent significant differences as revealed by the post -hoc test. Displayed are the means over all sampling dates and the standard errors.


Table S1. ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Tissue Die-back of the Different Experimental Heath (H4- and H2-) and Grassland (G4- and G4+) Plant Communities from Harvest One

Factor

Pre-exposure

Parameter

Tissue die-back (%)

Plant community

F

P

H4-

2.2

0.151

H2-

2.0

0.169

G4-

0.9

0.491

G4+

1.8

0.225


Table S2 ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Aboveground Biomass of the Different Experimental Heath (H4- and H2-) and Grassland (G4- and G4+) Plant Communities from Harvest One

Factor

Pre-exposure

Parameter

Aboveground biomass

Plant community

F

P

H4-

2.8

0.098

H2-

0.4

0.772

G4-

0.0

0.997

G4+

0.9

0.448


Table S3. ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Tissue Die-back and Reproductive Biomass (Seeds and Flowers) of the Heath and Grassland Plant Species from Harvest One

Factor

Pre-exposure

Parameter




Tissue die-back (%)

Reproductive biomass

Plant community

Species

F

P

F

P

H4-

Calluna vulgaris

0.9

0.489







Vaccinium myrtillus

1.3

0.342







H2-

Calluna vulgaris

1.4

0.294







Vaccinium myrtillus

0.4

0.788







G4-

Arrhenatherum elatius

0.2

0.901







Holcus lanatus

1.2

0.347







Plantago lanceolata

2.1

0.158

0.5

0.712

G4+

Arrhenatherum elatius

0.3

0.724

1.4

0.296

Holcus lanatus

0.0

0.962

1.0

0.410

Plantago lanceolata

2.3

0.159

1.5

0.279

Grey fields indicate that no analysis was performed.

Table S4. ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Aboveground Biomass and Ratio of Reproductive to Total Biomass of the Heath and Grassland Plant Species from Harvest One

Factor

Pre-exposure

Parameter




Aboveground biomass

Ratio of reproductive to total biomass

Plant community

Species

F

P

F

P

H4-

Calluna vulgaris

3.0

0.080





Vaccinium myrtillus

0.5

0.677





H2-

Calluna vulgaris

0.3

0.818





Vaccinium myrtillus

0.3

0.858





G4-

Arrhenatherum elatius

2.0

0.192





Holcus lanatus

0.5

0.677





Plantago lanceolata

0.5

0.696

0.2

0.870

G4+

Arrhenatherum elatius

1.8

0.230

1.0

0.408

Holcus lanatus

0.5

0.618

1.0

0.410

Plantago lanceolata

7.0

0.017

0.7

0.513

Grey fields indicate that no analysis was performed. Significant values are shown in bold (P < 0.05).

Table S5. ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Aboveground Biomass and Belowground Biomass of the Different Experimental Heath (H4- and H2-) and Grassland (G4- and G4+) Plant Communities from Harvest 2-8

Factor

Pre-exposure

Parameter

Aboveground biomass

Belowground biomass

Plant community

F

P

F

P

H4-

0.5

0.693

0.8

0.491

H2-

1.5

0.220

0.5

0.669

G4-

6.3

0.001

1.7

0.167

G4+

4.5

0.014

0.4

0.689

Significant values are shown in bold (P < 0.05).

Table S6. ANOVA Results for the Effects of Pre-exposure (‘Ambient Control’, ‘Drought’, ‘Heavy Rain’, and ‘Regular Watering’) on Aboveground Biomass and Ratio of Reproductive to Total Biomass of the Heath and Grassland Plant Species from Harvest 2-8

Factor

Pre-exposure

Parameter




Aboveground biomass

Ratio of reproductive to total biomass

Plant community

Species

F

P

F

P

H4-

Calluna vulgaris

0.2

0.864

0.9

0.436

Vaccinium myrtillus

2.6

0.057

0.9

0.433

H2-

Calluna vulgaris

1.1

0.354

0.7

0.579

Vaccinium myrtillus

1.5

0.227

0.7

0.555

G4-

Arrhenatherum elatius

2.1

0.106

0.9

0.460

Holcus lanatus

2.2

0.087

2.8

0.044

Plantago lanceolata

5.0

0.003

1.6

0.182

G4+

Arrhenatherum elatius

2.2

0.112

0.9

0.405

Holcus lanatus

1.8

0.174

4.8

0.010

Plantago lanceolata

16.8

< 0.0001

2.5

0.089

M-


Calluna vulgaris

2.3

0.145

1.8

0.190

Vaccinium myrtillus

1.6

0.213

2.7

0.111

Arrhenatherum elatius













Holcus lanatus

0.0

0.896

2.7

0.116

Grey fields indicate that no analysis was performed. Significant values are shown in bold (P < 0.05).




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