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Higher species diversity occurs in more fertile habitats without fertilizer disturbance in an alpine natural grassland community |
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| Authors: | Dong Wang Gao-Lin Wu Xiao-Feng Chang Zhi-Hua Shi Lei Sun Xue-Hong Wei |
| Institution: | 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, 712100, China 4. University of Chinese Academy of Sciences, Beijing, 100049, China 2. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, China 3. Institute of Plant Sci-Tech of Tibet Agriculture and Animal Husbandry College, Linzhi, 860000, China |
| Abstract: | Are there some relationships among species diversity and soil chemical properties of high altitude natural grasslands? Plant community composition and chemical properties of soil samples were compared to investigate the relationship between soil and species diversity, and the richness in Tibetan alpine grasslands. Results showed that species diversity was significantly positively related to soil organic matter(SOM), total nitrogen(TN),available nitrogen(AN), total phosphorus(TP),available phosphorus(AP), and available potassium(AK) in the high alpine grasslands. Margalef's species richness index was also significantly positively related to SOM, TN, AN, and TP. Most soil chemical properties showed significantly positive correlation with species diversity and Margalef's richness index.Our results suggested that higher plant species richness index and diversity occurred in more fertile soil habitats in high altitude natural grassland community. In practice, fertilization management for the restoration of degraded grassland should be conducted with reference to the nutrient levels ofnatural grassland without the additional artificial fertilizer and with higher species-diversity and richness index. |
| Keywords: | Species richness Soil properties Species diversity Biomass |
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