Effect of rainfall interannual variability on the biomass and soil water distribution in a semiarid shrub community |
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Authors: | JunShan Liu Xia Xu Yong Zhang YuQiang Tian Qiong Gao |
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Institution: | 1. State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Resources Science & Technology, Beijing Normal University, Beijing, 100875, China
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Abstract: | The dynamics of biomass and soil moisture in semiarid land is driven by both the current rainfall and the ecosystem memory. Based on a meta-analysis of existing experiments, an ecosystem model was used to calculate the effect of the rainfall interannual variability on the pattern of biomass and soil moisture in a shrub community. It was found that rainfall interannual variability enabled shrubs to be more competitive than grasses, and to maintain the dominant role over a longer time. The rainfall interannual variability resulted in complex soil moisture dynamics. The soil water recharge in wet years alternated with discharge in drought years. |
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Keywords: | rainfall shrub community Artemisia ordosica ecosystem model ecohydrology |
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