Radiocarbon dating of a very large African baobab
Radiocarbon dating of a very large African baobab
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DOI：
10.1093/treephys/27.11.1569
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发表时间：
2007-11-01
期刊：
影响因子：
4
通讯作者：
Xu, Li
中科院分区：
文献类型：
--
作者：
Patrut, Adrian;Von Reden, Karl F.;Xu, Li
2004年底，可能是已知最大的非洲猴面包树（Adansonia digitata L.） Grootboom在纳米比亚东北部意外倒塌。从树干的不同区域收集的10个木材样本进行了处理和加速器质谱放射性碳定年研究。3个样品的放射性碳测年均大于1000年BP（距今的放射性碳年，即公元1950年以前）。最古老样本的相应校准日历年龄为1275±50岁，使Grootboom成为已知最古老的被子植物树，具有可靠的年代测定结果。木材样本的放射性碳年代的变化表明，在形态上，Grootboom是一棵五重树，而在遗传上，它是一个单独的个体。极端横向样本的年代显示，在过去的500-600年里，格鲁布姆几乎停止了生长，这为非洲中部南部的气候变化提供了信息。Grootboom的突然消亡恰逢猴面包树疾病的传播，这种疾病的研究很少，在纳米比亚已经成为流行病。
In late 2004, Grootboom, probably the largest known African baobab (Adansonia digitata L.), collapsed unexpectedly in northeastern Namibia. Ten wood samples collected from different areas of the trunk were processed and investigated by accelerator mass spectrometry radiocarbon dating. The radiocarbon dates of three samples were greater than 1000 years BP (radiocarbon years before present, i.e., before AD 1950). The corresponding calibrated calendar age of the oldest sample was 1275 +/- 50 years, making Grootboom the oldest known angiosperm tree with reliable dating results. Variations in radiocarbon dates among the wood samples indicated that, morphologically, Grootboom was a quintuple tree, whereas genetically, it was a single individual. Ages of extreme lateral samples revealed that, over the past 500-600 years, Grootbooom had almost ceased growing, providing information about climate changes in central southern Africa. The sudden demise of Grootboom coincided with the spread of the poorly studied baobab disease, which has become epidemic in Namibia.