干旱区生态环境知识资源中心(Arid): 沙质草原沙漠化过程不同阶段稳定性与恢复性研究

Arid

	沙质草原沙漠化过程不同阶段稳定性与恢复性研究
其他题名	The study on stability and resilience in different stages of grassland desertification process
	杨持; 朱志海; 刘颖茹
来源期刊	生态学报
ISSN	1000-0933
出版年	2003
卷号	23 期号:12 页码:2545-2549
中文摘要	应用1984、2001、2002年在内蒙古锡林郭勒盟多伦县的野外调查样方资料，采用群落盖度变化；植物种在样方中出现频度的变异性、生物量的变异性和beta多样性指数作为指标，综合的分析沙漠化过程不同阶段的稳定性。结果表明：（1）沙漠化过程不同阶段盖度的下降比例并不是均匀的（35% 25% 15% 5% 1%），这种不均匀性可以反映出演变过程中不同阶段的保守性和易变性，下降比例越小，说明这一阶段越保守，从而也越稳定；（2）不同阶段1 m~2样方内所包含的物种数量，以及物种数量的变异系数（0.31 0.34 0.64 0.67）反映了演变的不均匀性；（3）不同阶段1 m~2样方内生物量的变异系数（0.50 0.49 0.66 0.64）反映出演变的不均匀性；（4）通常beta多样性指数被表示为群落间相似性指数（0.81 0.60 0.32 0.00），沙漠化过程中相邻两个阶段的相似性越高，说明稳定性也越高。以上几个指标反映的趋势是一致的。恢复性与稳定性正好相反，越稳定的阶段越不容易恢复，反之，越容易恢复。
英文摘要	By using the sampling data surveyed in Duolun County of Xilingole League of Inner Mongolia in 1984. 2001 and 2002 respectively, the variability and recovery of grassland desertification process in different stages were studied and analyzed Comprehensively adopting the changes of Community coverage in different stages of grassland desertification process, variability of species occurring frequency in sampling plots, variability of biomass and beta diversity index reflecting the variability degree in different stages as the indexes. The results showed that: (1) the decline of vegetation coverage was the most object changing in desertification process, but the decling ratio was uneven in different stages (35%25%0.15%5%0%). This unevenness reflected the conservativeness and changeability in different stages of evolution process. The less the ratio declined, the more conservative the stage was. Thereby it reflected that this stage was more stable, otherwise, it would be more unstable. (2) The species numbers appeared in lmz quadrat in different stages and its variation Coeffieient (0.310.340.640.67) reflected the evolution unevenness. (3) The variation coefficient of biomass (0.500.490.660.64) in 1m~2 quadrat in different stages also reflected the uneverness. (4) The higher the similarity between the two neighbouring stages in desertification process was, the more the stable the stage was. Usually, beta diversity index was indicated as similarity index of inter-community (0. 810. 600.320. 00). The tendency reflected by four indexes mentioned above was in coincidence. It was found that two remarkable points should be mentioned after analyzing the stages of desertification process: the first one is that the stability presented a declining tendency along with the intensified desertification process; the second is that in desertification process the variation among each stages before Light stage (A. frigida stage) was small, but the similarity was high. There was really a leap forward change subsequently after. A. frigida stage. The variation among the stages behind A. frigida stage increased, but similarity decreased. Recovery was really on the contrary to stability. The more stable the stage was, the uneasier the stage would be recovered; the more unstable the stage was, the easier the stage would he recovered. Consequently, there was an important task of protecting A. frigida stage not only from grassland degradation, but also from grassland desertification.
中文关键词	沙质草原 ; 沙漠化过程 ; 稳定性 ; 恢复性
英文关键词	grassland desertification process stability resilience
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:1269743
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204304
作者单位	内蒙古大学生命科学学院生态与环境科学系, 呼和浩特, 内蒙古 010021, 中国
推荐引用方式 GB/T 7714	杨持,朱志海,刘颖茹. 沙质草原沙漠化过程不同阶段稳定性与恢复性研究[J],2003,23(12):2545-2549.
APA	杨持,朱志海,&刘颖茹.(2003).沙质草原沙漠化过程不同阶段稳定性与恢复性研究.生态学报,23(12),2545-2549.
MLA	杨持,et al."沙质草原沙漠化过程不同阶段稳定性与恢复性研究".生态学报 23.12(2003):2545-2549.