Topsoil Nutrients Drive Leaf Carbon and Nitrogen Concentrations of a Desert Phreatophyte in Habitats with Different Shallow Groundwater Depths
| Autor: | Hui Yin, Caibian Huang, Gang-liang Tang, Hanlin Luo, Fanjiang Zeng, Bo Zhang, Zhihao Zhang, Jie Xue, Xiaopeng Gao, Yan Lu, Muhammad Shareef |
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| Rok vydání: | 2021 |
| Předmět: |
Water table
Geography Planning and Development Aquifer Aquatic Science Biochemistry Nutrient Alhagi sparsifolia Ecological stoichiometry TD201-500 Water Science and Technology Hydrology ecological stoichiometry Topsoil geography geography.geographical_feature_category Water supply for domestic and industrial purposes ecological protection Phreatophyte extremely arid region soil salt Hydraulic engineering Arid groundwater table Environmental science TC1-978 Groundwater |
| Zdroj: | Water Volume 13 Issue 21 Water, Vol 13, Iss 3093, p 3093 (2021) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w13213093 |
| Popis: | Phreatophytes are deep-rooted plants that reach groundwater and are widely distributed in arid and semiarid areas around the world. Multiple environmental factors affect the growth of phreatophytes in desert ecosystems. However, the key factor determining the leaf nutrients of phreatophytes in arid regions remains elusive. This study aimed to reveal the key factors affecting the ecological stoichiometry of desert phreatophytes in the shallow groundwater of three oases at the southern rim of the Taklimakan Desert in Central Asia. Groundwater depth groundwater pH and the degree of mineralization of groundwater topsoil pH and salt concentration topsoil and leaf carbon, nitrogen, and phosphorus concentrations of phreatophytic Alhagi sparsifolia grown at groundwater depths of 1.3–2.2 m in the saturated aquifer zone in a desert–oasis ecotone in northwestern China were investigated. Groundwater depth was closely related to the mineralization degree of groundwater, topsoil C and P concentrations, and topsoil salt content and pH. The ecological stoichiometry of A. sparsifolia was influenced by depth, pH and the degree of mineralization of groundwater, soil nutrients and salt concentration. However, the effects of soil C and P concentrations on the leaf C and N concentrations of A. sparsifolia were higher than those of groundwater depth and pH and soil salt concentration. Moreover, A. sparsifolia absorbed more N in the soil than in the groundwater and atmosphere. This quantitative study provides new insights into the nutrient utilization of a desert phreatophyte grown at shallow groundwater depths in extremely arid desert ecosystems. |
| Databáze: | OpenAIRE |
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