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地球科学进展  2008, Vol. 23 Issue (4): 408-414    DOI: 10.11867/j.issn.1001-8166.2008.04.0408
生态学研究     
人类活动与气候变化对科尔沁沙质草地植被的影响
赵哈林1,大黑俊哉2,周瑞莲3,李玉霖1,左小安1,黄刚1
1.中国科学院寒区旱区环境与工程研究所,甘肃 兰州 730000;2.东京大学农业与生命学院,东京 1138657;3.鲁东大学生命学院,山东 烟台 264025
Effects of Human Activity and Climate Changes on Vegetation in Horqin Sandy Grassland, Inner Mongolia
Zhao Halin1,Toshiya Okuro2,Zhou Ruilian3,Li Yulin1,Zuo Xiaoan1,Huang Gang1
1. Cold and Arid Regions Environment and Engineering Research Institute, Lanzhou 730000, China;2. Graduate School of Agricultural and Sciences, University of Tokyo, Tokyo 1138657, Japan;3. Faculty of Life Sciences, Ludong University, Yantai 264025, China
 全文: PDF(1587 KB)  
摘要:

1992—2006年在科尔沁沙地开展了草地放牧和封育试验,分析研究了人类放牧活动和气候变化对草地植被的影响。研究结果表明:①人类放牧活动对沙质草地植被具有显著影响,其中轻度放牧可使原退化草地植被盖度、高度、物种丰富度和多样性明显提高,中度放牧下虽然草地植被盖度和高度有所下降,但对物种丰富度和多样性无不良影响,持续过度放牧可以导致草地植被迅速破坏;②围栏封育可以促进退化草地植被盖度、高度、物种丰富度和植物多样性得到较快恢复,其恢复速度是草层高度>植被盖度>物种丰富度>多样性;③暖湿气候有利于草地维持较高的植被盖度、高度、物种丰富度和多样性,而持续干旱会导致相应指标的明显下降,多雨时期气温变化对植被的影响较大,干旱时期降水变化对植被的作用较强。

关键词: 科尔沁沙地人类活动气候变化草地植被影响      
Abstract:

To understand the effects of human activities and climate changes on sandy grassland vegetation in north China, a field grazing and enclosure experiment was conducted from 1992 to 2006 in Horqin Sand Land, Inner Mongolia. The results showed that: (1) the grazing had significant effects on grassland vegetation, in that the continual overgrazing could result in severe degradation of the vegetation, the light grazing was favorable to restoration of the height, coverage, richness and diversity, and the moderate grazing didn't induce decrease of the richness and diversity thought it also resulted in decrease of the height and coverage; (2) The enclosure could promote increase of the height, coverage, richness and diversity, the increased speed was the height > the coverage >the richness >the diversity; (3) the warm and wetness climate was favorable to maintain higher the height, coverage, richness and diversity in the sandy grassland, and the warm and dry climate could resulted in significant decrease of the height, coverage, richness and diversity; and the effects of the temperature on the vegetation was greater in the rainy period and the effects of the rainfall on the vegetation was greater in the drought period.

Key words: Horqin Sand Land    Human activity    Climate changes    Vegetation    Effects.
收稿日期: 2007-11-06 出版日期: 2008-04-10
:  S812.5  
基金资助:

中国科学院寒区旱区环境与工程研究所创新项目“科尔沁沙地生态与环境演变记录、机理与评估”(编号:O650444001);中国科学院知识创新工程方向性项目“北方沙漠化带典型生态系统水文过程与植被恢复”(编号:KZCX2-YW-431)资助.

通讯作者: 赵哈林     E-mail: zhaohalin666@hotmail.com
作者简介: 赵哈林(1954-),男,安徽马鞍山人,研究员,博导,主要从事荒漠生态学研究工作.E-mail:zhaohalin666@hotmail.com
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引用本文:

赵哈林,大黑俊哉,周瑞莲,李玉霖,左小安,黄刚. 人类活动与气候变化对科尔沁沙质草地植被的影响[J]. 地球科学进展, 2008, 23(4): 408-414.

Zhao Halin,Toshiya Okuro,Zhou Ruilian,Li Yulin,Zuo Xiaoan,Huang Gang. Effects of Human Activity and Climate Changes on Vegetation in Horqin Sandy Grassland, Inner Mongolia. Advances in Earth Science, 2008, 23(4): 408-414.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2008.04.0408        http://www.adearth.ac.cn/CN/Y2008/V23/I4/408

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