气候变化领域集成服务门户(CCPortal): Gap dynamics of natural Populus euphratica floodplain forests affected by hydrological alteration along the Tarim River: Implications for restoration of the riparian forests

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DOI	10.1016/j.foreco.2019.02.009
	Gap dynamics of natural Populus euphratica floodplain forests affected by hydrological alteration along the Tarim River: Implications for restoration of the riparian forests
	Keram A.; Halik Ü.; Keyimu M.; Aishan T.; Mamat Z.; Rouzi A.
发表日期	2019
ISSN	0378-1127
起始页码	103
结束页码	113
卷号	438
英文摘要	Due to climate change and excessive human activities, runoff dynamics of the Tarim River in northwest China become more pronounced. Understanding the effects of hydrological alteration on the life strategy and dynamics of the Populus euphratica riparian forests is becoming increasingly important. Forest gaps led by such disturbances change the structure and function of the desert riparian forest ecosystems. However, there is a lack of research on the gap formation and dynamics of this special forest type, for which the main driving force of the gap disturbance has always been unknown. In this study, we investigated several parameters of P. euphratica forest gap, such as gap size, gap age, gap fraction, and gap makers to quantify the gap disturbance regimes in the natural floodplain forests along the Tarim River in arid northwest China. In the middle reaches of the Tarim River, a total number of 263 gap makers and 60 gaps in six 50 m × 50 m plots with a total area of 1.5 hm 2 were investigated. The result showed that gap fraction was <5%, and approximately 28.5% of the expanded gaps were from 1.0 to 1.2 in size (ratio of gap diameter to tree height), especially when formed around 1997–2006. The median size of the expanded gap (140.57 m 2 ) in the desert riparian forests was smaller than in tropical forests. P. euphratica was the most abundant gap maker, and its share among gap makers was 12–14 times larger than another species. Furthermore, gap makers contributed to the forest gap size, as shown by a significant correlation between the number of gap makers and the size of expanded gaps, especially those that had been created 50–60 years ago (R 2 = 0.455, P < 0.01). The DBH distribution of living trees versus dead trees showed that most P. euphratica mortality occurred in small size classes. However, living trees were equally frequent in large classes, which suggested that large trees were not exclusively injured or died in these P. euphratica stands that were affected by poor habitats, such as water scarcity. We concluded that climate change and anthropogenic activities (increasing water use for irrigation) since the 1970s led to the progressive decrease in water resources at the regional scale and resulted in a higher frequency of forest gaps in the riparian forests along the Tarim River. The results of this study provide useful implications for ecological restoration of P. euphratica to improve sustainable management of desert riparian forests. © 2019 Elsevier B.V.
英文关键词	Ecological restoration; Forest regeneration/succession; Gap dynamics; Hydrological alteration; Populus euphratica; Riparian forest; Tarim River
语种	英语
scopus关键词	Banks (bodies of water); Climate change; Conservation; Dynamics; Ecosystems; Floods; Irrigation; Restoration; Rivers; Ecological restoration; Forest regeneration; Gap dynamics; Hydrological alterations; Populus euphratica; Riparian forests; Tarim river; Reforestation; climate change; deciduous tree; ecosystem function; ecosystem structure; environmental disturbance; floodplain forest; forest ecosystem; gap dynamics; human activity; hydrological change; mortality; regeneration; restoration ecology; riparian forest; succession; Conservation; Dynamics; Ecosystems; Floods; Irrigation; Restoration; China; Tarim River; Xinjiang Uygur; Populus euphratica
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156113
作者单位	College of Resources and Environmental Science, Xinjiang University, Ürümqi, 830046, China; Ministry of Education Key Laboratory of Oasis Ecology, Xinjiang University, Ürümqi, 830046, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Institute of Arid Ecology and Environment, Xinjiang University, Ürümqi, 830046, China
推荐引用方式 GB/T 7714	Keram A.,Halik Ü.,Keyimu M.,et al. Gap dynamics of natural Populus euphratica floodplain forests affected by hydrological alteration along the Tarim River: Implications for restoration of the riparian forests[J],2019,438.
APA	Keram A.,Halik Ü.,Keyimu M.,Aishan T.,Mamat Z.,&Rouzi A..(2019).Gap dynamics of natural Populus euphratica floodplain forests affected by hydrological alteration along the Tarim River: Implications for restoration of the riparian forests.Forest Ecology and Management,438.
MLA	Keram A.,et al."Gap dynamics of natural Populus euphratica floodplain forests affected by hydrological alteration along the Tarim River: Implications for restoration of the riparian forests".Forest Ecology and Management 438(2019).