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通过对青藏高原东北缘不同群落19个样点的表土花粉组合特征及其与植物群落之间关系的研究,发现:(1)针叶林和高山灌丛的花粉组合特征与植物群落有较好的对应关系,落叶阔叶林和针阔混交林的花粉组合基本上能反映植被群落特征,草本植物的花粉组合未能反映植物群落的数量特征;(2)主要花粉类型中松属、云杉属和桦属花粉具超代表性,杜鹃花科、杨属和柏科花粉具低代表性;(3)通过花粉相对含量降趋势对应分析(DCA)能较好地区分不同植被类型。该研究成果可为本地区及相似地区的古植被和古环境重建提供基础和验证资料。
The results showed that: (1) The pollen assemblage characteristics of coniferous forests and alpine shrubs were better than that of plant communities in 19 sample plots at the northeastern margin of Qinghai-Tibet Plateau. The pollen assemblage of deciduous broad-leaved forest and coniferous-broad-leaved mixed forest basically reflects the characteristics of vegetation community. The pollen assemblage of herbaceous plants does not reflect the quantitative characteristics of plant community. (2) The main pollen types of Pinus, Picea And Betula vulgaris are highly representative, and Rhododendron, Populus and Cypress pollen have low representation; (3) DCA can distinguish different vegetation types well. The results of this study can provide basic information and verification data for paleoenvironment and paleoenvironment reconstruction in this area and similar areas.