Differential responses of arbuscular mycorrhizal fungi to nitrogen addition in a near pristine Tibetan alpine meadow
文献类型：SCI/SSCI论文
| 作者 | Zheng Y. ; Kim Y. C. ; Tian X. F. ; Chen L. ; Yang W. ; Gao C. ; Song M. H. ; Xu X. L. ; Guo L. D. |
| 发表日期 | 2014 |
| 关键词 | 454 pyrosequencing AMF community composition nitrogen deposition Qinghai-Tibetan Plateau microbial communities semiarid grasslands tallgrass prairie temperate steppe plant diversity atmospheric co2 soil fertilization deposition abundance |
| 英文摘要 | Elucidating the responses of soil microbial abundance and community composition to nitrogen (N) addition is important for predicting ecosystem function under increased atmospheric N deposition. We examined the arbuscular mycorrhizal (AM) fungal community under three N forms (NH4+-N, NO3--N, and NH4NO3-N) and two N rates (1.5 and 7.5gNm(-2)year(-1)) in an alpine meadow of the Qinghai-Tibetan Plateau. AM fungal extraradical hyphal density was significantly decreased by NH4+-N in May, but was not affected by N form nor N rate in August. N rate, but not N form, significantly affected AM fungal spore density; high N rate decreased spore density. No direct N addition effect was observed on AM fungal community; however, soil available phosphorus, pH, and NO3--N were considered as important factors that influenced AM fungal community composition. Structural equation model results showed that N rate, not N form, strongly affected soil characteristics, which directly influenced community compositions of plants and AM fungi, as well as spore density. Therefore, AM fungal community was influenced by N addition, primarily because of altered soil characteristics, and partially by a modified plant community, but not or just slightly by direct N addition effects in this alpine meadow ecosystem. |
| 出处 | Fems Microbiology Ecology |
| 卷 | 89 |
| 期 | 3 |
| 页 | 594-605 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0168-6496 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29365]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zheng Y.,Kim Y. C.,Tian X. F.,et al. Differential responses of arbuscular mycorrhizal fungi to nitrogen addition in a near pristine Tibetan alpine meadow. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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