通过现代棕榈树分布反推哥伦布前人类活动范围,发现其影响远超考古证据所见。
Ecological Legacies of Pre-Columbian Settlements Evident in Palm Clusters of Neotropical Mountain Forests
- 用深度学习分析卫星影像,从棕榈树分布推断古代人类改造森林的区域。
- 大型遗址附近棕榈树集中区面积是现有考古证据的100倍以上。
- 适合对古代环境影响、生态考古或遥感应用感兴趣的读者。
古代人群曾居住并改造新热带森林,但其生态影响的空间范围在高分辨率下仍缺乏探索。本文提出一种基于深度学习与遥感的方法,通过现代植被分布估算哥伦布前森林改造区域。以哥伦比亚圣玛尔塔山脉高分辨率卫星影像为案例,评估棕榈树分布与考古基础设施的关系。研究发现,考古设施与当代棕榈树聚集存在非随机空间关联;大型基础设施遗址附近棕榈树显著更密集。最大棕榈群落范围表明,与重大遗址相关的人类管理区域可能比现有考古证据揭示的规模大两个数量级。这些模式支持过去人类活动影响局部棕榈丰度,并可能降低在偏远地区建立重基建聚落的后勤成本。更广泛而言,本研究强调棕榈景观分布可作为环境与多光谱数据中可解释的信号,用于约束考古遗址位置的预测模型。
原文摘要 · Abstract (English)
Ancient populations inhabited and transformed neotropical forests, yet the spatial extent of their ecological influence remains underexplored at high resolution. Here we present a deep learning and remote sensing based approach to estimate areas of pre-Columbian forest modification based on modern vegetation. We apply this method to high-resolution satellite imagery from the Sierra Nevada de Santa Marta, Colombia, as a demonstration of a scalable approach, to evaluate palm tree distributions in relation to archaeological infrastructure. Our findings document a non-random spatial association between archaeological infrastructure and contemporary palm concentrations. Palms were significantly more abundant near archaeological sites with large infrastructure investment. The extent of the largest palm cluster indicates that ancient human-managed areas linked to major infrastructure sites may be up to two orders of magnitude bigger than indicated by current archaeological evidence alone. These patterns are consistent with the hypothesis that past human activity may have influenced local palm abundance and potentially reduced the logistical costs of establishing infrastructure-heavy settlements in less accessible locations. More broadly, our results highlight the utility of palm landscape distributions as an interpretable signal within environmental and multispectral datasets for constraining predictive models of archaeological site locations.
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