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西北干旱区石羊河流域全新世早期植被与环境演化
引用本文:朱艳,巨天珍,等.西北干旱区石羊河流域全新世早期植被与环境演化[J].西北植物学报,2001,21(6):1059-1069.
作者姓名:朱艳  巨天珍
作者单位:1. 西北师范大学地理与环境科学学院;兰州大学资源环境学院
2. 西北师范大学地理与环境科学学院
3. 兰州大学资源环境学院
基金项目:国家自然科学基金重点资助项目 ( 4 9731 0 1 0 ),“973”国家重点基础研究发展规划项目 ( G1 990 4 35 0 1 )资助,西北师范大学创新工程资助
摘    要:西北干旱区石羊河流域终闾湖泊边缘三角城剖面湖相沉积物(10.0-6.3ka.B.P.)高分辨率(每样平均40-50a左右)孢粉分析揭示该流域全新世早期植被与气候环境变化过程是:全新世初期(10-9.8ka.B.P.),温度、湿度开始上升,山上针叶林发育,该期持续较短时间后,温度、湿度下降(9.8-9.2ka.B.P.),山上森林萎缩,山下荒漠范围扩大;此后是一个持续时间较长、波动的温度、湿度上升、植被发育状况逐步好转的过程(9.2-7.75ka.B.P.);随后又是短暂的气候冷干、植被亚化阶段(7.75-7.25ka.B.P.)和一个相对持续时间较长,植被发育较好的暖湿期(7.25-6.3ka.B.P.)。石河流域全新世早期气候环境变化具有较强的不稳定性,每个相对暧湿期和冷干期中都有多个次一级的冷干、暖湿波动,植被也相应地随之变化。

关 键 词:高分辨率  孢粉记录  植被变化  早全新世  石羊河流域  西北干旱区  气候变化
文章编号:1000-4025-(2001)06-1059-11
修稿时间:2000年9月7日

Vegetation and environmental changes based on high resolution pollen records in Shiyang River basin,arid lands NW China during early Holocene
ZHU Yan,JU Tian zhen,CHEN Fa hu,ZHANG Jia wu.Vegetation and environmental changes based on high resolution pollen records in Shiyang River basin,arid lands NW China during early Holocene[J].Acta Botanica Boreali-Occidentalia Sinica,2001,21(6):1059-1069.
Authors:ZHU Yan  JU Tian zhen  CHEN Fa hu  ZHANG Jia wu
Institution:ZHU Yan 1,2,JU Tian zhen 1,CHEN Fa hu 2,ZHANG Jia wu 2
Abstract:The Sanjiaocheng section,located at the end of Shiyang River (closed basin) in arid land,Northwest China,well suited for reconstruction of paleao climate and paleao environment.This study focuses on the lower portion (460-292 cm) of the Sanjiaocheng section.A series of radiocarbon dates bracketed those lacustrine sediments deposited between 10 ka.B.P.and 6.3 ka.B.P.The section was sampled at 2 cm intervals for pollen analysis and the resolution of each sample is ca 40-50 a.The results from pollen assemblages analysis indicate that the sequence of paleao environment and vegetation changes is:the initial period (10-9.8 ka.B.P.) is temperate warm and wet.Afterwards,there was a period (9.8-9.2 ka.B.P.) of cold and dry as well as deteriorated vegetation followed by a period (9.2-7.75 ka.B.P.) temperature and humidity increasing and vegetation growing well.Then a short period (7.75-7.25 ka.B.P.) of the coolest and driest climate and the seriously deteriorated vegetation appeared;and then it is shift to a longer period (7.25-6.3 ka.B.P.) of warmest and wettest,along with the vegetation growing well.The environment changed rapidly with sub changes in each period in the arid lands,Northwest China,during the early Holocene.
Keywords:high resolution  pollen recorder  vegetation changes  the early Holocene  the Shiyang River basin
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