阴山山脉东段花粉通量及其与表土花粉比较研究

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.

POLLEN INFLUX AND COMPARISON WITH SURFACE POLLEN IN THE EAST PART OF YINSHAN MOUNTAINS

A study of semblages from tryopsis shrub, grassland in Ma east part of Yin pollen influx and surface pollen aspeak meadow, birch forest, Osartificial pine forest and weeds nhan and Daqing Mountains in the shan mountains found that the diversities are obvious of pollen influx and pollen eontent 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 pollen and reflects surrounding vegetation well. But it is easily influenced by anthophilous pollen and local plants pollen. The pollen assemblages in Tauber traps are different from the surface pollen in the same sites. Pollen percentages of Pinus, Artemisia, Chenopodiaceae and Betula in surface samples are higher than that of Tauber trap samples, indicating these pollen taxa have stronger ability of transportation and preservation. Gramineae pollen is a kind of under-represented pollen types and weak to be preserved.