新疆表土中云杉花粉与植被的关系  

Seeking relationship between vegetation and Picea pollen in surface soils of Xinjiang, northwestern China

作　　者：阎顺[1] 孔昭宸[2] 杨振京 张芸[2] 倪健[2] 

机构地区：[1]中国科学院新疆生态与地理研究所,乌鲁木齐830011 [2]中国科学院植物研究所植被数量生态学重点实验室,北京100093

出　　处：《生态学报》2004年第9期2017-2023,共7页Acta Ecologica Sinica

基　　金：中国科学院创新重大基金资助项目 ( KZCX1-10 -0 5 ) ;国家自然科学基金重点资助项目 ( NSFC90 10 2 0 0 9) ;国家"973"课题资助项目( G19990 43 5 0 2 ) ;中国博士后科学基金资助项目 ( 2 0 0 3 0 3 3 2 5 3 )~~

摘　　要：通过对新疆天山、阿尔泰山、昆仑山、塔里木盆地、准噶尔盆地不同植被带中所取的 131个表土样中云杉花粉含量进行百分比统计分析 ,从而确定了影响表土中云杉花粉含量的主要因素是距云杉林地距离、海拔高度、气流和水流等。进而指出在荒漠、荒漠草原表土中云杉花粉含量稳定在 5 %以下 ;林带内表土中云杉花粉含量稳定在 30 %以上 ;在森林线以上的亚高山、高山草甸、高山垫状植被以及高山流石滩植被中表土中云杉花粉含量主要受气流的影响 ,而平原河谷林和平原低地草甸表土中的云杉含量则受水流的制约。pollen records from surface soils of the Tianshan Mountains, the Altay Mountains, the Kunlun Mountains, the Tarim Basin and the Jungger Basin in Xinjiang Autonomous Region, northwestern China, were collected from 1986 to 2001. Based on the statistic analysis of content of Picea pollen in these pollen records, we evaluated the major factors such as the distance away from spruce forest, elevation, air current and water course, that influence the content of Picea pollen in surface soils. Relationship between vegetation and Picea pollen was then quantified, and some characteristics of transport of Picea pollen in this region was revealed. Results show that, (1) Picea pollen appears in the surface soils of all the vegetation zones in Xinjiang. This indicated that Picea pollen disperses extensively and transports widely. (2) Distance is the most important factor that affects the content of Picea pollen in surface soils in this region. Beyond 10 km away from the spruce forest stand, the content of Picea pollen is less than 5%. From 5 to 10 km away from the forest stand, the content of Picea pollen increases with a range of fluctuation. From 1 to 5km away from the forest stand, the content increases significantly and reaches more than 10%. (3) Due to the differences in diversity of other plant species, the minimum content of Picea pollen is relatively high, with an average from 50%～60%, but the amplitude of such variation is also large. It's known that Picea forest occurs if the content of Picea pollen exceeds 30% in Xinjiang region. (4) In desert and desert-steppe, the content of Picea pollen is below 5% and 6%, respectively. (5) The influences of rivers and streams on the content are mainly revealed by pollen characteristics in river valley forest and lowland meadow, where the content of Picea pollen is changeable. The Picea pollen content is relatively higher than that in desert and desert-steppe with the similar distance away from the spruce forest as the river valley forest and lowland meadow. (6) The influence of

关 键 词：云杉花粉 表土 植被 新疆 

分 类 号：S718[农业科学—林学]