阴山山脉东段花粉通量及其与表土花粉比较研究
首发时间:2009-01-15
摘要:阴山山脉东段蛮汉山和大青山山顶草甸、桦木林、虎榛子灌丛、人工油松林及杂草草原5 个植被类型花粉通量与表土花粉对比研究发现,不同植被类型及同一植被类型不同样点花粉通量和花粉浓度差异明显,捕捉器样品花粉源区面积小于表土样品,能较好地反映样品点周围植被组成,但受虫媒植物和局地植物花粉影响,与表土 样品花粉组合差异明显;表土样品中松属、桦属、蒿属及藜科花粉含量多高于捕捉器样品,表明这些花粉不仅易于传播,而且在表土中具有较强的保存能力;禾本科花粉具低代表性,花粉保存能力较低。地层花粉分析中应引起注意。
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Pollen Flux and Surface Soil Pollen Assemblages in East Part of the Yinshan Mountains, Earthern of China
Abstract:A study on pollen flux and surface pollen assemblages from peak meadow, birch forest, Ostryopsis shrub, artificial pine forest and weeds grassland in Manhan and Daqing Mountains in the east part of Yinshan Mountains showed that the diversities of pollen flux and pollen content are obvious among different vegetation types, even among different sample sites in the same vegetation type. The Tauber trap sample has smaller pollen source area than surface soil sample and reflects surrounding vegetation well. The trap sample is easily influenced by anthophilous pollen and local plants pollen, which makes the trap sample cannot distinguish vegetation type well in Discriminant analysis. The cluster analysis results show that pollen assemblages between traps and surface samples are different. Pollen percentages of Pinus, Artemisia, Chenopodiaceae and Betula in surface samples are higher than that of Tauber trap samples, indicating these pollen taxa have strong ability of transportation and preservation. Gramineae pollen is a kind of under-representative pollen types and weak to be preserved. It is very important to pay great attention in interpreting fossil pollen.
Keywords: Pollen influx, surface pollen, Manhan Mountain, Daqing Mountain, east part of Yinshan Mountains
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No.2790839117912320****
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