干旱区生态环境知识资源中心(Arid): Clones or no clones: genetic structure of riparian Populus euphratica forests in Central Asia

Arid

	Clones or no clones: genetic structure of riparian Populus euphratica forests in Central Asia
	Kramp Katja; Schmitt Thomas; Lang Petra; Jeschke Michael; Schafer Philipp; Kulanek Dustin; Zhang Ximing; Yu Ruide; Thomas Frank M
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:5 页码:750-766
英文摘要	Many riparian (Tugai) forests growing along rivers in arid and hyper-arid regions of Central Asia are dominated by the Euphrates poplar (Populus euphratica). Besides generative reproduction, which is only possible upon flooding events and at a distance to the groundwater of less than 2 m, this phreatophytic tree species also reproduces vegetatively by forming clones that can cover land surface areas of several hectares. Along a gradient of groundwater distances, we investigated whether the fraction of clones in P. euphratica stands (1) increases with increasing distance to the water table; (2) is higher if supplied with water via river cut-offs; and (3) approaches 100% at a short distance to the groundwater, but at high salt concentrations in the upper soil layers, which would prevent germination and establishment of seedlings. AFLP (Amplified Fragment Length Polymorphism) analyses were conducted on leaf samples taken from mature P. euphratica trees growing at the fringes of the Taklimakan Desert in stands with different distances (2-12 m) to the groundwater at two plots at the middle and the lower reaches of the Tarim River and in a stand close to Ebinur Lake, Xinjiang, China. Genetic diversity was large among plots, but considerably smaller within plots. We found the highest genetic diversity (caused by regeneration from seeds) at plots that have a short distance to the groundwater or are supplied with additional water. There was no significant relationship between groundwater distance and clonal fraction. All investigated trees at the saline Ebinur Lake site belonged to one single clone. Our results demonstrate that the genetic pattern of this widespread species is not easily predictable even over small distances as it is a result of a complex interplay of stand history and dispersal of propagules (pollen, seeds, and vegetative diaspores) by wind and water. In conservation and restoration schemes, P. euphratica stands with a high genetic diversity and stands that grow at short distances to the water table and are regularly subjected to flooding (which favors generative over clonal reproduction) should be prioritized.
英文关键词	clonality floodplain forest ground water phreatophyte population genetics rejuvenation salinity
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6353575
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336023
作者单位	Kramp Katja, Senckenberg German Entomological Institute, Muncheberg, 15374, Germany.; Kulanek Dustin, Senckenberg German Entomological Institute, Muncheberg, 15374, Germany.; Schmitt Thomas, Senckenberg German Entomological Institute;;Department of Zoology, Faculty Natural Sciences I, Institute of Biology, Martin Luther University Halle-Wittenberg, ;;, Muncheberg;;Halle, Germany;;Germany 15374;;06099.; Lang Petra, Faculty of Regional and Environmental Sciences, University of Trier, Trier, 54296, Germany.; Jeschke Michael, Faculty of Regional and Environmental Sciences, University of Trier, Trier, 54296, Germany.; Schafer Philipp, Faculty of Regional and Environmental Sciences, University of Trier, Trier, 54296, Germany.; Thomas Frank M, Faculty of Regional and Environmental Sciences, University of Trier, Trier, 54296, Germany.; Zhang Ximing, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Yu Ruide, Xinjiang Institute of Ecology and Geography, Chin...
推荐引用方式 GB/T 7714	Kramp Katja,Schmitt Thomas,Lang Petra,et al. Clones or no clones: genetic structure of riparian Populus euphratica forests in Central Asia[J],2018,10(5):750-766.
APA	Kramp Katja.,Schmitt Thomas.,Lang Petra.,Jeschke Michael.,Schafer Philipp.,...&Thomas Frank M.(2018).Clones or no clones: genetic structure of riparian Populus euphratica forests in Central Asia.Journal of Arid Land,10(5),750-766.
MLA	Kramp Katja,et al."Clones or no clones: genetic structure of riparian Populus euphratica forests in Central Asia".Journal of Arid Land 10.5(2018):750-766.