Ecological Archives E091-095-A1

Sarah Auger and Serge Payette. 2010. Four millennia of woodland structure and dynamics at the Arctic treeline of eastern Canada. Ecology 91:1367–1379.

Appendix A. Description and physical and chemical properties of organic horizons and mineral horizons of the four soil trenches.

A.

 

Horizons

Thickness(cm)

pH water

C (%)

N (%)

C/N

1

L

0–2

3.76

45.08

0.6414

70.28

F

0–1

3.50

47.00

1.5750

29.84

H

1–2

3.47

25.35

0.9915

25.57

2

L

6–8

3.17

52.82

0.9358

56.44

F

7–8

2.71

48.55

0.8209

59.14

H

0–2

2.91

12.20

0.3206

38.05

3

L

0–3

2.97

49.92

1.0960

45.55

F

2–16

2.74

50.11

1.1030

45.43

H

0.5-3

2.83

20.86

0.4864

42.89

4 (P1)

L

2–5

3.75

40.28

0.7825

51.48

F

7–8

3.15

49.74

0.9476

52.49

H

0.5–1.5

3.03

24.29

0.6178

39.32

4 (P2)

L

6–8

3.31

50.07

0.6405

78.17

F

4–8

2.81

50.55

1.0180

49.66

H

0.5–1

2.90

20.45

0.4992

40.97

B.

Trench

Soil Classification

Plant cover

Horizons

Thickness (cm)

Color

Grain size

dry

humid

sand

silt

clay

1

Eluviated dystric brunisol

Lichen

Ae

2–4

10 YR 6/1

10 YR 5/2

82.2

14.6

3.3

Bm1

0–11

10 YR 6/3

7.5 YR 4/3

78.4

20.1

1.5

Bm2

2–12

7.5 YR 4/4

7.5 YR 3/2

72.4

24.0

3.6

Bm3

9–10

10 YR 5/3

10 YR 3/3

69.1

29.0

1.9

C

-

10 YR 6/3

7.5 YR4/3

71.3

25.1

3.6

2

Eluviated dystric brunisol

Dead spruces

Ae

1–9

10 YR 7/1

10 YR 4/1

72.9

23.6

3.5

Bm1

0–8

10 YR 5/2

10 YR 3/2

72.5

23.7

3.9

Bfj

0–40

10 YR 3/4

10 YR 2/2

72.8

21.4

5.8

Bm2

13–46

10 YR 5/4

10 YR 2/3

69.5

26.4

4.1

Bm3

0–11

10 YR 6/3

10 YR 3/2

65.0

30.4

4.6

C

0–6

2.5 Y 6/2

2.5 Y 3/3

35.5

61.7

2.8

3

Eluviated dystric brunisol

Living spruces

Ae

2–3

7.5 YR 7/1

5 YR 5/1

68.4

27.8

3.8

Bm

0–3

10 YR 4/3

10 YR 2/3

77.3

19.7

3.0

Bfj

0–4

10 YR 3/3

7.5 YR 2/3

75.0

18.7

6.3

C

0.5–2

10 YR 6/3

10 YR 3/3

37.5

59.1

3.4

4 (P1)

Humo-ferric Podzol

Living spruces

Ae

3–5

7.5YR 7/1.5

7.5 YR 4/1

75.6

21.6

2.8

Bm1

4–12

10 YR 5/2

10 YR 3/2

74.6

23.3

2.1

Bf

10–18

7.5 YR 3/3

7.5YR 1.7/1

70.7

23.3

6.0

Bm2

22–30

10 YR 5/4

10 YR 3/3

73.4

24.0

2.6

C

-

2.5 Y 6/2

2.5 Y 4/2

70.2

27.2

2.6

4 (P2)

Humo-ferric Podzol

Living spruces

Aeb

0–6

10YR 6/2.5

10 YR 3/3

76.7

21.7

1.6

Bmb1

3–6

10 YR 5/4

10 YR 3/2

71.8

24.6

3.6

Bfjb

0–14

10 YR 4/4

10 YR 2/3

72.4

24.2

3.4

Bmb2

8–20

10 YR 5/3

10 YR 3/3

74.5

22.3

3.1

Cb

-

10 YR 6/2

10 YR 3/2

78.9

19.5

1.6

C.

Trench

Horizons

pH water

pH CaCl2

C (%)

N (%)

C/N

Fe (%)

Al (%)

% (Fe+Al)pyro

Ca (%)

Na (%)

Mg (%)

K (%)

Base saturation (%)

CEC (meq/100g)

Pyro

Oxa

Dith

Tot

Pyro

Oxa

Dith

1

Ae

3.79

3.72

0.249

0.290

0.860

0.012

0.062

0.034

-

0.021

0.020

0.021

0.032

2.419

1.974

3.414

1.715

9.521

1.447

Bm1

4.21

4.09

0.222

0.227

0.981

0.091

0.161

0.159

0.683

0.052

0.056

0.047

0.143

0.949

2.269

0.937

1.238

5.392

1.757

Bm2

3.99

4.06

0.631

0.238

2.651

0.088

0.127

0.114

0.694

0.136

0.132

0.118

0.224

3.409

0.962

1.036

0.400

5.808

3.178

Bm3

4.20

4.23

0.352

0.229

1.536

0.036

0.107

0.072

0.625

0.104

0.103

0.085

0.140

8.254

0.000

1.874

0.446

10.575

1.757

C

4.45

4.41

0.076

0.219

0.347

0.017

0.122

0.065

0.674

0.072

0.069

0.052

0.089

18.216

1.353

5.622

3.222

28.414

0.439

2

Ae

3.27

3.21

0.509

0.231

2.201

0.021

-

-

-

0.027

-

-

0.048

2.815

2.224

4.634

1.590

11.263

1.421

Bm1

3.22

3.36

0.799

0.242

3.295

0.090

-

-

0.770

0.055

-

-

0.145

6.661

0.718

4.138

0.486

12.003

3.978

Bfj

3.64

3.97

1.607

0.269

5.983

0.216

-

-

0.824

0.288

-

-

0.504

4.606

0.182

2.475

0.102

7.365

8.758

Bm2

3.98

4.25

0.780

0.239

3.262

0.084

-

-

0.706

0.205

-

-

0.288

4.532

0.288

1.815

0.192

6.827

4.082

Bm3

4.02

4.34

0.496

0.232

2.138

0.080

-

-

0.737

0.150

-

-

0.229

7.331

0.000

2.534

0.259

10.124

2.273

C

4.13

4.41

0.492

0.234

2.105

0.061

-

-

0.878

0.138

-

-

0.198

8.336

1.065

2.506

0.363

12.271

2.299

3

Ae

3.38

3.38

0.841

0.236

3.560

0.031

-

-

-

0.021

-

-

0.052

4.963

0.922

4.902

1.431

12.218

2.687

Bm

3.92

3.98

1.036

0.252

4.108

0.122

-

-

0.771

0.134

-

-

0.256

4.222

0.273

1.835

0.216

6.546

4.934

Bfj

3.67

3.83

2.389

0.296

8.076

0.314

-

-

0.773

0.272

-

-

0.586

2.668

0.245

0.819

0.139

3.871

11.057

C

4.05

4.32

0.991

0.265

0.166

0.267

-

-

0.831

0.101

-

-

3.744

9.086

1.253

3.451

0.778

14.569

3.100

4

(P1)

Ae

3.19

2.99

0.417

0.239

1.747

0.014

0.048

0.029

-

0.018

0.013

0.010

0.032

10.023

1.242

8.913

2.098

22.276

1.447

Ae/Bf

3.21

3.22

0.457

0.236

1.935

0.078

0.095

0.104

0.848

0.051

0.038

0.028

0.129

2.903

0.780

2.867

0.749

7.300

2.583

Bf

3.50

3.69

2.256

0.281

8.017

0.283

0.266

0.321

0.825

0.382

0.336

0.359

0.665

2.008

0.109

0.815

0.198

3.131

12.116

Bfj

3.85

4.10

0.585

0.236

2.479

0.078

0.127

0.120

0.760

0.198

0.188

0.168

0.276

3.652

0.148

1.202

0.548

5.550

2.738

C

3.97

4.30

0.142

0.224

0.635

0.021

0.065

0.060

0.841

0.078

0.078

0.055

0.099

8.117

0.688

2.741

2.491

14.036

0.801

4

(P2)

Ae

3.26

3.14

0.418

0.237

1.763

0.015

-

-

-

0.018

-

-

0.032

6.855

1.858

6.472

1.831

17.015

1.653

Bm1

3.18

3.33

0.649

0.246

2.641

0.133

-

-

0.800

0.064

-

-

0.197

2.151

0.151

2.781

0.453

5.536

3.255

Bfj

3.33

3.72

1.786

0.263

6.793

0.193

-

-

0.674

0.271

-

-

0.464

1.206

0.155

0.604

0.154

2.120

9.533

Bm2

3.59

3.98

1.119

0.246

4.549

0.127

-

-

0.933

0.223

-

-

0.350

2.688

0.240

0.708

0.277

3.913

4.650

Aeb

3.88

4.01

0.422

0.231

1.826

0.074

-

-

-

0.110

-

-

0.183

3.510

0.099

1.406

0.432

5.447

1.757

Bmb1

3.86

3.99

0.668

0.234

2.851

0.129

-

-

0.696

0.184

-

-

0.313

2.671

0.272

1.218

0.202

4.362

4.056

Bfjb

3.98

3.96

1.222

0.250

4.892

0.157

-

-

0.701

0.337

-

-

0.493

3.029

0.329

1.247

0.162

4.768

5.942

Bmb2

4.05

4.07

0.430

0.229

1.875

0.050

-

-

0.728

0.143

-

-

0.193

13.472

3.746

1.874

1.514

20.606

1.757

Cb

4.15

4.22

0.167

0.222

0.753

0.026

-

-

0.760

0.080

-

-

0.106

15.836

0.000

2.896

1.100

19.832

0.853


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