依连哈比尔尕山南北坡表土孢粉与植被关系研究

A comparative study on the relationship between surface pollen and vegetation on the north and south slopes of the northern Tianshan mountains

根据表土花粉分析和植被样方调查,对新疆依连哈比尔尕山南、北坡垂直带的植被与表土孢粉的关系进行了对比研究。结果表明:南北坡的花粉组合特征能较好的反应当地植被特征,但是在具体的科属组成上也有差异;云杉、藜科、蒿属等花粉具有超代表性,莎草科、禾本科低代表性,菊科花粉具有一定代表性。在对花粉的代表性进行分析时应注意山谷风的搬运作用。蒿藜比(A/C)在北坡可以作为山地垂直湿度变化的参考,在南坡则没有太大参考意义。

Based on surface pollen analysis and vegetation plot survey,the relationship between vegetation and surface pollen in the vertical zones on the nouth and north slopes of northern Tianshan Mountains in Xinjiang was studied.The results showed that the surface pollen assemblages sampled from the north and south slopes could better reflect the characteristics of local modern vegetation,but there were significant differences between pollen assemblage zones and local vegetation as to the vegetation composition and plant families.The pollen from Picea,Chenopodiaceae and Artemisia are more representative,but Cyperaceae and Gramineae pollen are less representative,Compositae pollen had certain representativeness.In the analysis of the representativeness of pollen,attention should be paid to the use of valley wind.ratio of Artemisia to Chenopodiaceae(A/C)can be used as a reference for the change of vertical humidity in the north slope,but on the south slope it does not make much sense.