Holocene mire development and climatic change from a high Andean Plantago rigida cushion mire
Holocene mire development and climatic change from a high Andean Plantago rigida cushion mire
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安第斯高地车前草垫状泥沼的全新世泥沼发育和气候变化
DOI：
10.1177/095968369400400302
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
A. Cleef
中科院分区：
文献类型：
--
作者：
A. Bosman;H. Hooghiemstra;A. Cleef
哥伦比亚东科迪勒拉帕拉莫德钦加萨海拔 3730m 的草帕拉莫带中的小车前草垫状泥沼 (Turbera de Calostros) 长 225 厘米的花粉图记录了最近 8500 年的全新世植被历史。三个放射性碳测年法（8410 ± 160 BP、7230 ± 1340 BP 和 5980 ± 75 BP）提供了一个时间范围。地带性禾本科植物和亚帕拉莫植被类群的花粉占主导地位，由于该高海拔地区的上坡风成花粉供应，亚安第斯（山地下部）森林成分的花粉比例过高。识别出八个花粉区，并在区域范围内反映了上游森林线（在 3000-3100 和 3500m 之间波动）的一系列海拔变化以及安第斯山（上山地）森林组成的同步变化。根据放射性碳日期并使用花粉密度记录，估计环境条件变化的日期 c． 8700、8600、7800、7500、6650、5200、300 和 100BP。讨论了与东科迪勒拉山脉这部分地区其他古生态记录的相关性。每个花粉区代表了车前子泥沼当地发展的一个特征阶段。
A pollen diagram of a 225 cm long core from a small Plantago rigida cushion mire (Turbera de Calostros) in the grassparamo belt at 3730m altitude in the Paramo de Chingaza, Eastern Cordillera of Colombia, records the last 8500 years of Holocene vegetational history. Three radiocarbon dates (8410 ± 160 BP, 7230 ± 1340 BP and 5980 ± 75 BP) provide a time frame. Pollen of taxa of zonal grassparamo and subparamo vegetation are dominant and pollen of subandean (lower montane) forest elements are overrepresented due to upslope aeolian pollen supply to this high-elevation site. Eight pollen zones were recognized and reflect, on a regional scale, a sequence of altitudinal shifts of the upper forest line (oscillating between 3000-3100 and 3500m) and synchronous changes in the composition of the Andean (upper montane) forest. Based on the radiocarbon dates and using the pollen density record, dates of changes in environmental conditions are estimated c. 8700, 8600, 7800, 7500, 6650, 5200, 300 and 100BP. Correlation with other palaeoecological records from this part of the Eastern Cordillera is discussed. Each pollen zone represents a characteristic phase in the local development of the Plantago rigida mire.