A Paleoecological Record from a Late Classic Maya Reservoir in the North Petén
A Paleoecological Record from a Late Classic Maya Reservoir in the North Petén
复制标题
北佩滕地区晚期古典玛雅水库的古生态记录
DOI：
10.2307/25063105
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发表时间：
2007
影响因子：
0.9
通讯作者：
R. Hansen
中科院分区：
文献类型：
--
作者：
D. Wahl;Thomas M. E. Schreiner;R. Byrne;R. Hansen
阿瓜达·扎卡塔水库位于危地马拉佩廷纳克贝以西4公里处的一个巴霍水库内。它的直径为100米，周围的护堤大约有1米高。萨卡塔的小古典式遗址毗邻美洲虎。水库的人工衬砌防止了旱季的干燥，并加强了微化石的保存。1998年，从水库中央取了一个335厘米的沉积物岩心，分析了花粉、显微木炭和总有机质。基于两次AMS放射性碳测定的岩心年代学显示，该记录涵盖了从公元695年到现在的时期。只有上面113厘米处有保存完好的微体化石。花粉记录清楚地记录了一段时期的农业活动，随后是遗弃和森林演替。在农业时期(公元695-840)，玉米花粉与干扰指标一起被发现。在大约公元840年被遗弃后，记录中以水生花粉类型为主，没有玉米花粉。花粉光谱的这种变化代表着经典时期的结束。
Abstract Aguada Zacatal is a reservoir located within a bajo 4 km west of Nakbe, Petén, Guatemala. It is 100 m in diameter and the surrounding berm is approximately 1 m tall. The small Classic period site of Zacatal is adjacent to the aguada. The reservoir's artificial lining prevents dry season desiccation and enhances microfossil preservation. In 1998 a 335 cm sediment core was taken from the center of the reservoir and analyzed for pollen, microscopic charcoal, and total organic matter. Core chronology, based on two AMS radiocarbon determinations, shows the record covers the period from A.D. 695 to present. Only the upper 113 cm contained well-preserved microfossils. The pollen record clearly documents a period of agricultural activity followed by abandonment and forest succession. In the agricultural period (A.D. 695-840), corn pollen is found in conjunction with disturbance indicators. After the abandonment at approximately A.D. 840, the record is dominated by aquatic pollen types and corn pollen is absent. This shift in pollen spectra represents the end of the Classic period.