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Table 2 Summary of age scenarios.

From: Longevity and growth of Acacia tortilis; insights from 14C content and anatomy of wood

Core

Scenario

Date combinations

Gompertz parameters

Establ.

  

I

II

III

IV

V

VI

a

b

c

 

Umm Duhaysy a

i

-

1998.1

1956.5

1950

  

267.1

1.971

0.545

1948

Umm Duhaysy a

ii

-

1998.1

1956.5

1780

  

282.4

2.027

0.016

1719

Umm Duhaysy a

iii

-

1998.1

1956.5

1655

  

308.0

2.113

0.008

1528

Umm Duhaysy a

iv

-

1998.1

1956.5

1545

  

342.0

2.218

0.005

1346

Muwaylhah b

i

1993.9

1990.2

1979.3

1865

1805

 

254.4

2.244

0.026

1772

Muwaylhah b

ii

1993.9

1990.2

1979.3

1865

1750

 

282.6

2.346

0.012

1680

Muwaylhah b

iii

1993.9

1990.2

1979.3

1865

1685

 

355.2

2.585

0.007

1561

Muwaylhah b

iv

1993.9

1990.2

1979.3

1710

1685

 

249.9

2.254

0.065

1673

Hulus Upper b

i*

1975.5

1940

1910

1770

  

253.8

1.638

0.021

1714

Hulus Upper b

ii*

1975.5

1940

1910

1680

  

261.1

1.667

0.012

1579

Hulus Upper b

iii

1975.5

1925

1805

1770

  

247.1

1.612

0.097

1759

Hulus Upper b

iv

1975.5

1925

1750

1680

  

247.1

1.612

0.049

1656

Hulus Upper b

v

1975.5

1855

1805

1770

  

247.2

1.612

0.097

1759

Hulus Upper b

vi

1975.5

1855

1805

1680

  

249.1

1.618

0.026

1634

Hulus Upper b

vii

1975.5

1855

1750

1680

  

247.1

1.612

0.049

1656

Hulus Upper b

viii

1975.5

1810

1805

1770

  

249.9

1.623

0.094

1758

Hulus Upper b

ix

1975.5

1810

1805

1680

  

250.0

1.624

0.027

1637

Hulus Upper b

x

1975.5

1810

1750

1680

  

247.5

1.613

0.048

1636

Jimal a

i

1998.2

1996.8

1992.8

1991.3

1971.0

1945

235.7

2.915

0.086

1939

Jimal a

ii**

1998.2

1996.8

1992.8

1991.3

1971.0

1930

252.1

3.024

0.051

1920

Jimal a

iii

1998.2

1996.8

1992.8

1991.3

1971.0

1770

4761.0

6.052

0.003

1661

Jimal a

iv

1998.2

1996.8

1992.8

1991.3

1971.0

1660

319.4

595.300

0.022

-

Jimal a

v

1998.2

1996.8

1992.8

1991.3

1971.0

1535

-

-

-

-

Jimal a

via

1998.2

1996.8

1992.8

1991.3

1963.0

1945

227.8

2.937

0.134

1942

Jimal a

vii**a

1998.2

1996.8

1992.8

1991.3

1963.0

1930

234.4

2.923

0.069

1922

Jimal a

viiia

1998.2

1996.8

1992.8

1991.3

1963.0

1770

954.8

4.417

0.005

1683

Jimal a

ixa

1998.2

1996.8

1992.8

1991.3

1963.0

1660

719500.0

11.050

0.001

1448

Jimal a

xa

1998.2

1996.8

1992.8

1991.3

1963.0

1535

-

-

-

-

  1. Date combinations are based on calibrated calendar dates (midpoints of 1 sigma ranges) of 14C dated samples. Some scenarios use other estimates: '*' lower (sample III) and upper (sample II) 1 sigma range, '**' lower 1 sigma range (sample VI). 'a' indicates that the alternative date for sample V is used (see Table 1). Gompertz parameters in italics are not significant (p > 0.05). '-' indicates parameters that couldn't be estimated. Establishment date (Establ.) is defined as the year in which cumulative radial growth was at least 1 mm (Fig. 5).