Composition of the soil fungal community is more sensitive to phosphorus than nitrogen addition in the alpine meadow on the Qinghai-Tibetan Plateau
详细信息 查看全文
- 作者：Dan He ; Xingjia Xiang ; Jin-Sheng He ; Chao Wang…
- 关键词：Nitrogen addition ; Phosphorus addition ; Soil fungi ; Alpine meadow
- 刊名：Biology and Fertility of Soils
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：52
- 期：8
- 页码：1059-1072
- 全文大小：741 KB
- 刊物类别：Earth and Environmental Science
- 刊物主题：Life Sciences
Agriculture
Soil Science and Conservation - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-0789
- 卷排序：52
文摘
The alpine meadow on the Qinghai-Tibetan Plateau (QTP), which is sensitive to global climate change and human activities, is subjected to addition of nutrients such as nitrogen (N) and phosphorus (P) in the soil. The impacts of N or P on ecosystem structure and function depend at least partly on the response of soil fungal communities, although few studies have compared the effects of N and P addition, both separately and together. We examined the responses of composition of the soil fungal community to 3-year experimental nutrient additions (control, N, N plus P, and P) in a typical alpine meadow of the QTP. We found that P addition, regardless of N addition, significantly reduced fungal species richness and changed fungal community composition, while the effect of N was undetectable. Nitrogen plus phosphorus caused a more distinct community than either N or P addition alone. Multivariate regression tree, canonical correspondence analysis, and distance-based multivariate linear model analyses all suggested available P was a key parameter determining the diversity and composition of the fungal community. Other parameters such as dissolved organic N, aboveground net primary productivity of forbs, and dissolved organic C played important but secondary roles. The results indicated an important role of P in structuring soil fungal communities in the alpine meadow. Our results suggest that fungal diversity loss and long-term changes in ecosystem stability can result from fertilization management in the fragile alpine environment.