Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12665-016-5694-2 |
Differential soil moisture pulse uptake by coexisting plants in an alpine Achnatherum splendens grassland community | |
Wu, Huawu1,2,3; Li, Xiao-Yan1,2; Li, Jing4,5; Jiang, Zhiyun2; Chen, Huiying1,2; Ma, Yujun1,2; Huang, Yongmei1,2 | |
通讯作者 | Li, Xiao-Yan |
来源期刊 | ENVIRONMENTAL EARTH SCIENCES
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ISSN | 1866-6280 |
EISSN | 1866-6299 |
出版年 | 2016 |
卷号 | 75期号:10 |
英文摘要 | The niche differentiation of resources among coexisting plants commonly reflects the fundamental functions of plant coexistence in water-limited ecosystems. However, the dynamics of water use patterns by coexisting plants that respond to soil moisture pulses are scarcely known in the semiarid alpine ecosystems of the Qinghai-Tibetan Plateau, particularly for deep-rooted grasses such as Achnatherum splendens in the Qinghai Lake watershed. Hence, we used the stable deuterium isotope method to detect the potential water sources for A. splendens during two growing seasons of 2013 and 2014. Our results indicate that SWC and delta D values of shallow soil layer (0-10 cm) showed the highest variations in comparison with those in other soil layers during the growing seasons due to the combined effect of evaporation and precipitation inputs. A. splendens depended largely on shallow soil water availability at the early growing season. At the peak of the growing season, this deep-rooted grass A. splendens and shallow-rooted grass Leymus chinensis showed a high degree of response in the water use source to the changes in soil moisture pulses and shifted their water source from shallow to deep soil layer because water in the shallow soil layer became less available due to a long-time rainless days with strong evaporation effect on the shallow soil layer. In contrast, shallow soil water was utilized by all coexisting plants owing to an abrupt increase in shallow SWC with large events or long-lasting small events. At the late growing season, A. splendens used water from the shallow (0-10 cm) and middle soil layer (10-30 cm), while L. chinensis mainly relied on the shallow soil layer water. Comparatively, shallow-rooted herbs (Heteropappus altaicus and Allium tanguticum) predominantly used water from the shallow soil layer (0-10 cm) over the entire growing seasons regardless of soil water availability. Overall, the contrasting water use patterns by coexisting plants demonstrate their adaptations to the fluctuations of soil moisture pulses in water-limited ecosystems. |
英文关键词 | Stable isotopes Soil water availability Precipitation pulse Mixing isotope IsoSource model Interspecific competition |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000376589500067 |
WOS关键词 | STABLE-ISOTOPE ANALYSIS ; WATER-UPTAKE ; DESERT PLANTS ; NEOTROPICAL SAVANNA ; PRECIPITATION ; RESPONSES ; SHRUBS ; GROWTH ; ECOSYSTEMS ; DELTA-O-18 |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
来源机构 | 中国科学院地理科学与资源研究所 ; 北京师范大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192660 |
作者单位 | 1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 2.Beijing Normal Univ, Coll Resources Sci & Technol, Beijing 100875, Peoples R China; 3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Huawu,Li, Xiao-Yan,Li, Jing,et al. Differential soil moisture pulse uptake by coexisting plants in an alpine Achnatherum splendens grassland community[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2016,75(10). |
APA | Wu, Huawu.,Li, Xiao-Yan.,Li, Jing.,Jiang, Zhiyun.,Chen, Huiying.,...&Huang, Yongmei.(2016).Differential soil moisture pulse uptake by coexisting plants in an alpine Achnatherum splendens grassland community.ENVIRONMENTAL EARTH SCIENCES,75(10). |
MLA | Wu, Huawu,et al."Differential soil moisture pulse uptake by coexisting plants in an alpine Achnatherum splendens grassland community".ENVIRONMENTAL EARTH SCIENCES 75.10(2016). |
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