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Table 7 Diversity estimates of the regeneration layer interpolated and extrapolated based on incidence data using the iNEXT package

From: Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam

t

Method

Order

qD

qD.LCL

qD.UCL

SC

SC.LCL

SC.UCL

1

Interpolated

0

8.689

8.192

9.186

0.285

0.260

0.310

46

Interpolated

0

76.482

71.335

81.629

0.932

0.920

0.943

90

Observed

0

97.000

88.869

105.131

0.956

0.944

0.967

135

Extrapolated

0

112.371

101.118

123.623

0.966

0.952

0.979

180

Extrapolated

0

124.231

109.061

139.401

0.974

0.959

0.988

1

Interpolated

1

8.689

8.252

9.126

0.285

0.266

0.304

46

Interpolated

1

43.074

40.362

45.786

0.932

0.918

0.945

90

Observed

1

46.133

43.020

49.246

0.956

0.943

0.968

135

Extrapolated

1

47.702

44.350

51.053

0.966

0.952

0.979

180

Extrapolated

1

48.772

45.241

52.303

0.974

0.960

0.987

1

Interpolated

2

8.689

8.146

9.232

0.285

0.261

0.309

46

Interpolated

2

28.902

26.513

31.290

0.932

0.919

0.944

90

Observed

2

29.651

27.145

32.157

0.956

0.943

0.968

135

Extrapolated

2

29.921

27.372

32.471

0.966

0.951

0.981

180

Extrapolated

2

30.058

27.487

32.630

0.974

0.958

0.989

  1. t = number of sampling plots; order = Hill number with 0 = species richness; 1 = Shannon diversity, 2 = Simpson diversity; qD = the estimated diversity for a given sample size and order; SC = the estimated sample coverage; qD.LCL, qD.UCL = the lower and upper confidence level for the estimated diversity at the default value of 0.95; SC.LCL, SC.UCL = the lower and upper confidence level for the estimated sample coverage with a default value of 0.95