Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1461-0248.2004.00615.x |
Below-ground competition between trees and grasses may overwhelm the facilitative effects of hydraulic lift | |
Ludwig, F; Dawson, TE; Prins, HHT; Berendse, F; de Kroon, H | |
通讯作者 | Ludwig, F |
来源期刊 | ECOLOGY LETTERS
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ISSN | 1461-023X |
出版年 | 2004 |
卷号 | 7期号:8页码:623-631 |
英文摘要 | Under large East African Acacia trees, which were known to show hydraulic lift, we experimentally tested whether tree roots facilitate grass production or compete with grasses for below-ground resources. Prevention of tree-grass interactions through root trenching led to increased soil water content indicating that trees took up more water from the topsoil than they exuded via hydraulic lift. Biomass was higher in trenched plots compared to controls probably because of reduced competition for water. Stable isotope analyses of plant and source water showed that grasses which competed with trees used a greater proportion of deep water compared with grasses in trenched plots. Grasses therefore used hydraulically lifted water provided by trees, or took up deep soil water directly by growing deeper roots when competition with trees occurred. We conclude that any facilitative effect of hydraulic lift for neighbouring species may easily be overwhelmed by water competition in (semi-) arid regions. |
英文关键词 | Acacia tortilis facilitation soil water stable isotopes tree-grass interactions |
类型 | Article |
语种 | 英语 |
国家 | Netherlands ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000222716600002 |
WOS关键词 | AFRICAN HUMID SAVANNA ; MOJAVE DESERT ; WATER-UPTAKE ; ROOTING PATTERNS ; EAST-AFRICA ; PLANTS ; VEGETATION ; SHRUBS ; TRANSPORT ; NUTRIENTS |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of California, Berkeley |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/146621 |
作者单位 | (1)Univ Wageningen & Res Ctr, Subdept Nat Conservat, NL-6708 PD Wageningen, Netherlands;(2)Univ Calif Berkeley, Dept Integrat Biol, Ctr Stable Isotope Biogeochem, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Ludwig, F,Dawson, TE,Prins, HHT,et al. Below-ground competition between trees and grasses may overwhelm the facilitative effects of hydraulic lift[J]. University of California, Berkeley,2004,7(8):623-631. |
APA | Ludwig, F,Dawson, TE,Prins, HHT,Berendse, F,&de Kroon, H.(2004).Below-ground competition between trees and grasses may overwhelm the facilitative effects of hydraulic lift.ECOLOGY LETTERS,7(8),623-631. |
MLA | Ludwig, F,et al."Below-ground competition between trees and grasses may overwhelm the facilitative effects of hydraulic lift".ECOLOGY LETTERS 7.8(2004):623-631. |
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