干旱区生态环境知识资源中心(Arid): Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China

Arid

	Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China
	Aishan Tayierjiang; Halik Umut; Betz Florian; Tiyip Tashpolat; Ding Jianli
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2015
卷号	7 期号:4 页码:544-554
英文摘要	Understanding stand structure and height-diameter relationship of trees provides very useful information to establish appropriate countermeasures for sustainable management of endangered forests. Populus euphratica, a dominant tree species along the Tarim River watershed, plays an irreplaceable role in the sustainable development of regional ecology,economy and society. However, as the result of climate changes and human activities, the natural riparian ecosystems within the whole river basin were degraded enormously, particularly in the lower reaches of the river where about 320 km of the riparian forests were either highly degraded or dead. In this study, we presented one of the main criteria for the assessment of vitality of P. euphratica forests by estimating the defoliation level, and analyzed forest structure and determined the height-diameter (height means the height of a tree and diameter means the diameter at breast height (DBH) of a tree) relationship of trees in different vitality classes (i.e. healthy, good, medium, senesced, dying, dead and fallen). Trees classified as healthy and good accounted for approximately 40% of all sample trees, while slightly and highly degraded trees took up nearly 60% of total sample trees. The values of TH (tree height) and DBH ranged from 0-19 m and 0-125 cm, respectively. Trees more than 15 m in TH and 60 cm in DBH appeared sporadically. Trees in different vitality classes had different distribution patterns. Healthy trees were mainly composed more of relatively younger trees than of degraded tress. The height-diameter relationships differed greatly among tress in different vitality classes, with the coefficients ranging from 0.1653 to 0.6942. Correlation coefficients of TH and DBH in healthy and good trees were higher than those in trees of other vitality classes. The correlation between TH and DBH decreased with the decline of tree vitality. Our results suggested that it might be able to differentiate degraded P. euphratica trees from healthy trees by determining the height-diameter correlation coefficient, and the coefficient would be a new parameter for detecting degradation and assessing sustainable management of floodplain forests in arid regions. In addition, tree vitality should be taken into account to make an accurate height-diameter model for tree height prediction.
英文关键词	stand structure height-diameter relationship Populus euphratica tree vitality Tarim River
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5427733
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335495
作者单位	Aishan Tayierjiang, Key Laboratory of Oasis Ecology, College of Resource & Environmental Sciences, Xinjiang University, Urumqi, Xinjiang 830046, China.; Halik Umut, Key Laboratory of Oasis Ecology, College of Resource & Environmental Sciences, Xinjiang University, Urumqi, Xinjiang 830046, China.; Tiyip Tashpolat, Key Laboratory of Oasis Ecology, College of Resource & Environmental Sciences, Xinjiang University, Urumqi, Xinjiang 830046, China.; Ding Jianli, Key Laboratory of Oasis Ecology, College of Resource & Environmental Sciences, Xinjiang University, Urumqi, Xinjiang 830046, China.; Betz Florian, Key Laboratory of Oasis Ecology, Faculty of Geography and Mathematics, Catholic University of Eichstaett-lngolstadt, Germany, 85071.
推荐引用方式 GB/T 7714	Aishan Tayierjiang,Halik Umut,Betz Florian,et al. Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China[J],2015,7(4):544-554.
APA	Aishan Tayierjiang,Halik Umut,Betz Florian,Tiyip Tashpolat,&Ding Jianli.(2015).Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China.Journal of Arid Land,7(4),544-554.
MLA	Aishan Tayierjiang,et al."Stand structure and height-diameter relationship of a degraded Populus euphratica forest in the lower reaches of the Tarim River, Northwest China".Journal of Arid Land 7.4(2015):544-554.