Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.foreco.2015.05.011 |
Wood harvest by pollarding exerts long-term effects on Populus euphratica stands in riparian forests at the Tarim River, NW China | |
Lang, Petra1; Jeschke, Michael1; Wommelsdorf, Tobias1; Backes, Tobias1; Lv, Chaoyan2; Zhang, Ximing3![]() | |
通讯作者 | Lang, Petra |
来源期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2015 |
卷号 | 353页码:87-96 |
英文摘要 | Populus euphratica (Euphrates poplar) is the dominant tree species of the riparian ("tugai") forests of Central Asia, which provide important ecosystem services to a rapidly growing population. However, overuse of the forests by wood harvest (pollarding) contributes markedly to their destabilisation. At the upper reaches of the Tarim River (Xinjiang, NW China), we investigated the effects of past pollarding (in the 1970s and 1980s) on the stand structure, tree morphology, stern diameter increment and intrinsic water use efficiency (iWUE) of poplars with different pollarding intensities in the past (’No Use’, ’Moderate’, ’Intense’) growing on three adjacent plots with the same distance to the groundwater level. Compared to the non-used trees, the pollarded poplars (in particular, the intensely used trees) exhibited smaller figures of the following morphological variables: ratio of tree height to diameter at breast height, vertical crown extension, crown projection area, crown volume, and tree-ring width as well as basal area increment (BAI) during the past 24 years; but a higher number of secondary shoots, a higher percentage of hollow stems and a higher degree of hollowness of the stems. The pollarded trees were capable of regenerating to a certain extent, which was obvious from the formation of secondary shoots and, in the intensely pollarded trees, from a lower iWUE (inferred by more negative delta C-13 isotopic ratios of the tree rings; most probably due to higher rates of gas exchange) as well as from their capability of re-establishing a crown efficiency similar to non-pollarded trees. However, the BAI of the main trunk and the secondary branches of the pollarded trees decreased continuously during the last 24 years of investigation. Whilst moderate intensities of pollarding seem to be sustainable for the riparian P. euphratica forests, intense pollarding reduces the growth increment of the trees and, even more importantly, results in a distinct increase in the percentage of hollow stems, which can render the trees less stable and more susceptible to secondary damaging factors. The significant correlations between BAI and morphological variables of crown projection area and crown volume are promising for developing approaches to assess the productivity of P. euphratica stands on a landscape level using methods of remote sensing. (C) 2015 Elsevier B.V. All rights reserved. |
英文关键词 | Dendroecology Euphrates poplar Forest management Non-timber products Taklamakan Desert Tree morphology |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000362058700010 |
WOS关键词 | HYPERARID DESERT ; TRANSITION ZONE ; GROWTH ; DYNAMICS ; WATER ; VEGETATION ; PLANTS ; PHREATOPHYTES ; COMPETITION ; FLOODPLAIN |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
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/2XILL650/187316 |
作者单位 | 1.Univ Trier, Fac Reg & Environm Sci, Geobot, D-54296 Trier, Germany; 2.Xinjiang Cele Natl Field Sci Observat & Res Stn D, Cele 848300, Xinjiang, Peoples R China; 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Lang, Petra,Jeschke, Michael,Wommelsdorf, Tobias,et al. Wood harvest by pollarding exerts long-term effects on Populus euphratica stands in riparian forests at the Tarim River, NW China[J]. 中国科学院新疆生态与地理研究所,2015,353:87-96. |
APA | Lang, Petra.,Jeschke, Michael.,Wommelsdorf, Tobias.,Backes, Tobias.,Lv, Chaoyan.,...&Thomas, Frank M..(2015).Wood harvest by pollarding exerts long-term effects on Populus euphratica stands in riparian forests at the Tarim River, NW China.FOREST ECOLOGY AND MANAGEMENT,353,87-96. |
MLA | Lang, Petra,et al."Wood harvest by pollarding exerts long-term effects on Populus euphratica stands in riparian forests at the Tarim River, NW China".FOREST ECOLOGY AND MANAGEMENT 353(2015):87-96. |
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