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中新网北京7月30日电 (记者 孙自法)国际学术期刊《自然》最新发表一篇考古学论文称,研究人员利用激光雷达(LiDAR)的航空勘测成像技术,检测到亚马孙地区西南部432处被称为“土墩”(earthwork)的地表遗存,其地理位置此前曾是古代亚马孙西南部Aquiry文明的定居地,他们推测该地区可能有2.4万-3万处土墩。

这项考古研究发现,可能有助于重新估计亚马孙地区土墩和建造者群体的真实规模。
该论文介绍,古代Aquiry文明留下的大型地面几何形沟槽围合结构,称为亚马孙地雕(Amazonian geoglyphs),人们认为其功能兼具仪式、政治和公共集会中心。这些大多单独分布的结构由沟渠和堤坝组成,占地在0.35公顷至14公顷不等,已知最大的地雕面积近50公顷。
过去对亚马孙各地地雕数量的估计受到限制,因为这些估算仅基于森林砍伐区域发现的遗址(在这些区域相对容易探测考古特征),而激光雷达的航空勘测成像技术,则能揭示出密集雨林冠层下隐藏的结构。
在本项研究中,论文第一作者和通讯作者、芬兰赫尔辛基大学Martti Pärssinen和同事及合作者一起,在亚马孙4497平方公里的区域开展激光雷达调查,包括巴西多座城市。他们的数据集中揭示了432处土墩,其中396处此前未有记录。
通过外推这些结果,并结合现有卫星研究,论文作者认为Aquiry地区(约占地18.3万平方公里)可能含有2.4万–3万处土墩。此外,他们估计Aquiry文明在鼎盛时期(公元100-300年)可能养活了约125万-300万人口,这意味着对亚马孙的土壤、森林结构和生物多样性产生的影响,比此前认为的更为深远。

论文作者总结说,Aquiry文明所占区域不到大亚马孙地区的3%,但这一地区含有的潜在土墩数量可能比此前预计整个亚马孙盆地的还要多。他们认为,亚马孙其他地方的土墩如果也存在类似的集中度,则应重新评估前殖民时期的人口及其对当地的影响。(完)
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