干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠沙丘微地形变化对草本植物多样性影响

Arid

	古尔班通古特沙漠沙丘微地形变化对草本植物多样性影响
其他题名	Effect of slope aspect and terrain of sand dune on herbaceous diversity in Gurbantunggut desert
	贾风勤 1; 任娟娟 2; 张元明3
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2018
卷号	37 期号:1 页码:26-34
中文摘要	为探究微地形对草本植物物种多样性的影响,选择古尔班通古特沙漠垄状沙丘为研究区,从49月连续4次进行地上植被调查,研究了沙丘坡向和坡位对草本植物多样性时空变化的影响。结果表明:沙丘草本植物种以菊科为主,生活型多为短命植物;迎风坡植物密度显著少于背风坡,且随调查期的后延,两坡向植物密度变化均呈V字型,共有种以背风坡相对较多;alpha多样性指数在迎风坡及背风坡均为坡上部最大,坡底最小且有显著差异;从49月,各坡位alpha多样性指数呈减少和V字型2种变化趋势;随坡位升高,迎风坡和背风坡物种替代性指数降低,相似性指数增加,两者在背风坡均表现为显著变化;随调查时间后延,两坡向上物种替代指数增加,相似性指数降低,但替代性指数均无显著差异,沙丘坡向和坡位对草本植物alpha多样性和beta多样性时空格局均产生显著影响。因此,保护和恢复沙漠植物多样性,应考虑沙丘坡向和坡位生境异质性,并结合植物多样性在时间上的变化特征以制定科学的沙漠管理措施。
英文摘要	Spatial-temporal pattern of vegetation is determined by a variety of environmental factors on different scales.The influence of slope aspect and terrain on vegetation pattern has been increasingly reported in recent years.This study investigated the influence of slope location and terrain on vegetation distribution and their temporal structure on typical longitude sand dune in Gurbantunggut desert to provide scientific evidence for vegetation utilization and management,biodiversity conservation and ecosystem restoration and reconstruction.On each of three selected typical sand dunes,five parallel transects (west-eastern direction) were established at 20 m intervals.Each transect covered six terrains: The base,low-slope,and upslope of the windward and leeward slopes of the sand dune.In mid-April 2015,the aboveground vegetation was sampled in three 1 m * 1 m quadrats randomly placed along the transects.All plant species within each quadrat were identified and recorded.Among windward slope and leeward slope of sand dune,the main herbaceous species were from Compositae,and life form of ephemeral plants had the highest proportion;herbaceous density on windward slope was significantly lower than that on leeward slope,but showed a same trend ofVpattern from April to September.On both slope aspects,the highest alpha-diversity (richness index,Shannon index,Simpson index and Pielou index) was observed at up-slope and the lowest at base of slope;there was a decreasing trend or aVpattern in each terrain over investigation time.Cody index decreased but Sorenson index increased with the terrain rising on windward slope and leeward slope.The results suggested that habitat heterogeneity of sand dune terrain and slope should be considered to preserve and restore the desert plant diversity.Meanwhile,the temporal variation of plant diversity should be also considered to make scientific measures for desert management.
中文关键词	沙丘 ; 坡位 ; alpha多样性 ; beta多样性 ; 时空格局
英文关键词	sand dune terrain alpha-diversity beta-diversity spatial-temporal pattern
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:6156126
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238181
作者单位	1.乌鲁木齐职业大学旅游学院;;中国科学院新疆生态与地理研究所, ;;中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐;;乌鲁木齐, ;; 830002;;830011; 2.乌鲁木齐职业大学旅游学院, 乌鲁木齐, 新疆 830002, 中国; 3.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	贾风勤,任娟娟,张元明. 古尔班通古特沙漠沙丘微地形变化对草本植物多样性影响[J]. 中国科学院新疆生态与地理研究所,2018,37(1):26-34.
APA	贾风勤,任娟娟,&张元明.(2018).古尔班通古特沙漠沙丘微地形变化对草本植物多样性影响.生态学杂志,37(1),26-34.
MLA	贾风勤,et al."古尔班通古特沙漠沙丘微地形变化对草本植物多样性影响".生态学杂志 37.1(2018):26-34.