内江城区现代孢粉组合及其与植被关系

通过内江城区5个样点表土花粉组合特征及其与植物群落关系的分析,结果表明:(1)花粉组合中木本植物花粉占59. 6%,木本植物与草本植物花粉比值(AP/NAP)约为1. 5;以松属、桤木属和蒿属为主。(2)城郊荒地花粉组合与母体植被能较好地对应,老城公园花粉组合基本能反映母体植被中优势种,城中小丘花粉组合难以反映植物群落的数量特征;随着人类活动干扰程度增强,花粉组合与母体植被的对应关系减弱。(3)主要花粉类型中松属、桤木属和蒿属花粉具超代表性;棕榈科、栾树属、禾本科和榕属花粉具低代表性。可为四川盆地及相似地区环境考古和花粉过敏症研究提供基础数据和参考资料。

The Relationship between Surface Pollen and its Vegetation in Neijiang Urban Area, Sichuan Province

: In this paper 5 surface pollen samples from different communities in Neijiang urban area are analyzed for the relationship between pollen assemblages and their vegetation. The Arboreal Pollen is 59.6% and AP/NAP (AP: Arboreal Pollen, NAP: Noarboreal Pollen) ratio is about 1.5. Pinus, Alnus and Artemisia are the main pollen taxa in quantities. Pollen assemblages of suburban wasteland correspond well with their communities, that of park in old city may represent the combinated characteristics of plant communities moderately, and pollen assemblages of the hill in the city are not well associated with their numerical characteristics of vegetational community. With the strength of human activities, the relationship between pollen assemblages and vegetation is more and more weak. Palmae, Koelreuteria, Gramineae and Ficus are under-represented, whereas Pinus, Alnus and Artemisia are over-represented pollen species. This study provides basic and verified data on researching the environmental archaeology and pollen allergy in Sichuan Basin and similar areas.