Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.foreco.2017.03.037 |
Patterns of biomass allocation in Haloxylon persicum woodlands and their understory herbaceous layer along a groundwater depth gradient | |
Xu, Gui-Qing2; Yu, Dan-Dan3; Li, Yan1 | |
通讯作者 | Li, Yan |
来源期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 395页码:37-47 |
英文摘要 | To investigate above- and belowground biomass allocation patterns and the relationship of root distribution between different functional groups (shrubs vs. herbs) along a groundwater depth gradient, an experiment was carried out in a Haloxylon persicum woodland. Four sites were selected along the groundwater depth gradient. At each site, five sample plots (20 x 20 m) and 15 subplots (1 x 1 m) were established for a vegetation inventory of Haloxylon persicum and the herbaceous layer. The vegetation inventory included plant density, canopy coverage, height, and basal stem diameter of H. persicum. Allometric equations were established for H. persicum based on the biomass of 22 excavated trees, which were then applied to inventory data to provide stand estimates of aboveground biomass (AGB), below ground biomass (BGB), and total biomass (TB) of H. persicum. The AGB of the herbaceous layer was measured in subplots (1 x 1 m) and BGB was excavated and measured to a depth of 100 cm at 10-cm intervals. Our results indicated that the BGB-to-AGB ratio at the community level in the herbaceous layer increased notably along the gradient of declining groundwater depth. The depth of the soil horizon that contained 65% of the root surface area and 85% of the root biomass was shallower (0-2.5 m) in the deep end of the groundwater depth gradient than in the shallow end (0-3 m) of the gradient. H. persicum adjusted root distribution to capture water in the upper soil layers in response to the decline in groundwater depth. However, this adjustment was not sufficient to compensate for the decline in the water table: the BGB-to-AGB ratio showed no significant increase as AGB declined. On the contrary, herbaceous plants seemed better adapted to changes in the water table by effectively adjusting their BGB-to-AGB ratio. Use of BGB-to-AGB ratios that are specific to groundwater tables will significantly improve our estimates of BGB carbon stocks in these woodlands. Considering the scarcity of information on biomass stocks and partitioning in desert woodlands, our results might be applicable to other desert regions in Central Asia dominated by H. persicum. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Haloxylon persicum Groundwater depth gradient Desert ecosystem Root-to-shoot ratio Vertical root distribution |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000401389600005 |
WOS关键词 | WATER-TABLE ; ROOT BIOMASS ; PLANT BIOMASS ; SHRUB INTERACTIONS ; VEGETATION COVER ; SOIL ; DESERT ; PINE ; ECOSYSTEMS ; RAINFALL |
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/2XILL650/198973 |
作者单位 | 1.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Linan 311300, Peoples R China; 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Xinjiang, Peoples R China; 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Gui-Qing,Yu, Dan-Dan,Li, Yan. Patterns of biomass allocation in Haloxylon persicum woodlands and their understory herbaceous layer along a groundwater depth gradient[J]. 中国科学院新疆生态与地理研究所,2017,395:37-47. |
APA | Xu, Gui-Qing,Yu, Dan-Dan,&Li, Yan.(2017).Patterns of biomass allocation in Haloxylon persicum woodlands and their understory herbaceous layer along a groundwater depth gradient.FOREST ECOLOGY AND MANAGEMENT,395,37-47. |
MLA | Xu, Gui-Qing,et al."Patterns of biomass allocation in Haloxylon persicum woodlands and their understory herbaceous layer along a groundwater depth gradient".FOREST ECOLOGY AND MANAGEMENT 395(2017):37-47. |
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