Knowledge Resource Center for Ecological Environment in Arid Area
| 秦岭地区第四纪植被史及部分相关花粉形态的研究 | |
| 赵先贵 | |
| 出版年 | 1998 |
| 学位类型 | 博士 |
| 导师 | 宋之琛 |
| 学位授予单位 | 中国科学院南京地质古生物研究所 |
| 中文摘要 | 对中更新世以来秦岭植被发展史进行了推断论证。从秦岭9个海拔高度、7种类型植被下表土的花粉分析结果可以看出: (1)秦岭花粉组合基本反映了植被组成；(2)松属花粉散布的距离较远，花粉含量与松的数量间缺乏相关性；(3)相当数量的花粉是原地降落；(4)冷杉花粉的代表性较低，传播距离很近。根据秦岭北麓一个黄土-古土壤剖面的花粉分析结果，笔者认为古土壤的古植被为森林草原；黄土层的古植被为干旱草原。黄土粉尘堆积的气候条件下植被为Ａ模式：500-1000m: 岛状暗针叶林与干草原镶嵌；1000-1500m: 落叶针叶林；1500-2000m: 灌丛草甸；2000-4000m: 高寒荒漠。当间冰期所候到来时植被大臻为Ｂ模式: 500-1000m: 森林草原；1000-2200m：阔叶林；2200-2800m: 云、冷杉针叶林；2800-3300m: 落叶针叶林; 3300m 以上: 灌丛草甸。 |
| 英文摘要 | Present paper deduces forest vegetation history in Qinling since the Middle Pleistocene through studying sediment and surface samples. The results of pollen analysis of surface samples from Qinling mountain show that: (1) Pollen assemblage of surface samples under different type of vegetation basically reflects corresponding vegetation composition. (2) The pollen of Pinus can fly very far in Qinling, and very high pollen content of surface samples does not interrelate with the numbers of Pinus in vegetation composition. (3) In the total pollen yield, numerous pollen falls in their in their original location. (4) The representation of Abies pollen is lower, and Abies pollen spreads a short distance Under Abies forest, its pollen makes up only 19.3 percent of the total pollen yield of herbs and trees, and 21.7 percent of trees. According to the pollen analysis of marshland sediment in low-lying land among Qinling mountains from 2200m height above sea level, the vegetation develops as follow: Picea and Abies coniferous forest-Abies forest-Herb (Artemisia, compositae, Gramineae and Cyperaceare) was in marshland. Betula, Quercus, Corylus, Alnus, Tsuga and a little amount of Pinus were in little aggregation in the mountain slope near the marshland. This is suggested to be caused by modern people's activity. On the basis of the results of pollen analysis of loess-paleosoil at the northern foot of Qinling, with referece to result of climate cycle of loess-palaeosoil and type of palaeosoil, the palaeo-vegetation of palaeosoil should be forest - steppe; the palaeo-vegetation of loess should be steppe. In glacial climate the loess formed, and then vegetation of Qinling was type A: steppe inlaid island dark coniferous forest around 500 - 1000 meters above sea level: deciduous coniferous forest around 1000 - 1500 meters above sea level; scrub and meadow around 1500-2000 meters above sea level; high cold desert around 2000 - 2400 meters above sea level. When interglacial climate came, the plants adapted cold and humid condition turn back up Qinling mountain. Vegetation at foot of mountain and in basin in front of mountain was forest steppe. Palaeosoil formed and vegetation of Qinling roughly was type B: forest steppe around 500 - 1000 meters above sea level; broad-leaved forest around 1000-2200 meters above sea level; Picea and Abies coniferous forest around 2200-2800 meters above sea level deciduous coniferous forest around 2800-3300 meters above sea level; scrub meadow over 3300 meters above sea level. |
| 中文关键词 | 秦岭 ; 花粉分析 ; 植被史 ; 花粉形态 |
| 英文关键词 | Qinling mountain pollen analysis vegetation history pollen morphology |
| 语种 | 中文 |
| 国家 | 中国 |
| 来源机构 | 中国科学院南京地质古生物研究所 |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/286219 |
| 推荐引用方式 GB/T 7714 | 赵先贵. 秦岭地区第四纪植被史及部分相关花粉形态的研究[D]. 中国科学院南京地质古生物研究所,1998. |
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