Arid
DOI10.1016/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; Thomas, Frank M.1
通讯作者Lang, Petra
来源期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
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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