Effects of global change factors and living roots on root litter decomposition in a Qinghai-Tibet alpine meadow
Effects of global change factors and living roots on root litter decomposition in a Qinghai-Tibet alpine meadow
复制标题
全球变化因素和活根对青藏高寒草甸根凋落物分解的影响
DOI：
10.1038/s41598-019-53450-5
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发表时间：
2019-11
影响因子：
4.6
通讯作者：
Hu Shuijin
中科院分区：
文献类型：
--
作者：
Shu Meng;Zhao Qingzhou;Li Zhen;Zhang Lin;Wang Peng;Hu Shuijin
然而，很少有实验仔细研究根系分解受全球变化的影响。结果表明，施氮增加了凋落物的质量和剩余碳，促进了凋落物中氮的积累。降水量增加显著放大了N添加对凋落物残留量的正向作用。在凋落物袋中存在活根会降低凋落物的C残留量，但显著增加凋落物的N和磷残留量。然而，我们没有发现空气变暖对凋落物分解的显著影响。
Roots account for a major part of plant biomass in Tibetan alpine meadows. Understanding root decomposition with global change is key to predict carbon (C) and nutrient dynamics on the Qinghai-Tibet Plateau. Yet, few experiments have carefully examined root decomposition as influenced by global change. We conducted a field study to investigate the effects of nitrogen (N) addition, air warming, precipitation change, and the presence/absence of living roots on root decomposition in a Tibetan alpine meadow. Our results showed that N addition increased the mass and C remaining, and induced N accumulation in the litter. Increased precipitation significantly amplified the positive effect of N addition on litter mass remaining. The presence of alive roots in the litterbags decreased root litter C remaining but significantly increased N and phosphorus remaining of the litter. However, we did not find any significant effects of air warming on the litter decomposition. In the Qinghai-Tibet Plateau, N deposition is predicted to increase and precipitation regime is predicted to change. Our results suggest that the interaction between increased N and precipitation may reduce root decomposition in the Qinghai-Tibet Plateau in the future, and that the large stock of living roots exert a dominant impact on nutrient dynamics of root decomposition in the Tibetan alpine systems.
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影响因子：
5.5
作者：
I. Prieto;M. Almagro;F. Bastida;J. Querejeta
通讯作者：
I. Prieto;M. Almagro;F. Bastida;J. Querejeta
影响因子：
3.7
作者：
Gundersen, P;Emmett, BA;Tietema, A
通讯作者：
Tietema, A
影响因子：
4.6
作者：
Zhu W;Wang J;Zhang Z;Ren F;Chen L;He JS
通讯作者：
He JS
影响因子：
6.1
作者：
GOSZ, JR;LIKENS, GE;BORMANN, FH
通讯作者：
BORMANN, FH
影响因子：
1.7
作者：
Guangping Xu;Yigang Hu;Shiping Wang;Zhenhua Zhang;X. Chang;J. Duan;C. Luo;Z. Chao;Ailing Su;Q. Lin;Ying-nian Li;Mingyuan Du
通讯作者：
Guangping Xu;Yigang Hu;Shiping Wang;Zhenhua Zhang;X. Chang;J. Duan;C. Luo;Z. Chao;Ailing Su;Q. Lin;Ying-nian Li;Mingyuan Du