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

BMC Ecology

Table 1 Dating results for hyperactive samples.

Core	Sample	Lab. Ref.	F14C	+/-	δ13C	Calibrated date	Intervening GR	Overall GR
Umm Dihaysi a	I¹	TUa-5425	1.045	0.004	-25.2	-	-
Umm Dihaysi a	II	TUa-5426	1.080	0.005	-25.6	1998.1 (1956.7)	1.13 (0.13)
Umm Dihaysi a	III	TUa-5427	1.090	0.005	-24.2	1956.5 (1996.2/1997.4)	0.29 (6.18/15.60)	0.38
Muwaylhah b	I	TUa-5431	1.130	0.004	-28.8	1993.9	0.63
Muwaylhah b	II	TUa-5432	1.158	0.005	-28.4	1990.2	1.93
Muwaylhah b	III	TUa-5433	1.303	0.005	-27.0	1979.3	0.77	0.89
Hulus Upper	I	TUa-5428	1.381	0.006	-24.3	1975.5	0.23	0.23
Jimal a	I	TUa-5420	1.082	0.005	-27.4	1998.2	0.52
Jimal a	II	TUa-5421	1.107	0.005	-25.5	1996.8	0.66
Jimal a	III¹	TUa-5422	1.143	0.005	-26.7	1992.8	2.37
Jimal a	IV¹	TUa-5423	1.141	0.005	-27.4	1991.3	2.39
Jimal a	V	TUa-5424	1.514	0.007	-25.7	1971.0 (1963.0)	2.00 (1.44)	1.87

¹⁴C content (F14C, including measurement error (+/-) and fractionation values (δ13C)), calibrated dates (1 sigma midpoint) and estimated growth rates (GR in mm/yr) are summarised. The intervening GR is estimated, based on the period between the sample under consideration and the next youngest sample. Overall GR is estimated based on the period between the oldest date and sample date (2003).
¹ For ambiguous dates refer to the text for further explanation.

ISSN: 1472-6785