Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition
文献类型：期刊论文
| 作者 | Sun, Tao3,4; Hobbie, Sarah E.4; Berg, Bjoern1,5; Zhang, Hongguang6; Wang, Qingkui3; Wang, Zhengwen3; Hattenschwiler, Stephan2 |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2018-10-09 |
| 卷号 | 115期号:41页码:10392-10397 |
| 关键词 | long-term decomposition mycorrhizal fungi root tips plant-soil interactions trait coordination |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.1716595115 |
| 英文摘要 | Decomposition is a key component of the global carbon (C) cycle, yet current ecosystem C models do not adequately represent the contributions of plant roots and their mycorrhizae to this process. The understanding of decomposition dynamics and their control by traits is particularly limited for the most distal first-order roots. Here we followed decomposition of first-order roots and leaf litter from 35 woody plant species differing in mycorrhizal type over 6 years in a Chinese temperate forest. First-order roots decomposed more slowly (k = 0.11 +/- 0.01 years(-1)) than did leaf litter (0.35 +/- 0.02 years(-1)), losing only 35% of initial mass on average after 6 years of exposure in the field. In contrast to leaf litter, nonlignin root C chemistry (nonstructural carbohydrates, polyphenols) accounted for 82% of the large interspecific variation in first-order root decomposition. Leaf litter from ectomycorrhizal (EM) species decomposed more slowly than that from arbuscular mycorrhizal (AM) species, whereas first-order roots of EM species switched, after 2 years, from having slower to faster decomposition compared with those from AM species. The fundamentally different dynamics and control mechanisms of first-order root decomposition compared with those of leaf litter challenge current ecosystem C models, the recently suggested dichotomy between EM and AM plants, and the idea that common traits can predict decomposition across roots and leaves. Aspects of C chemistry unrelated to lignin or nitrogen, and not presently considered in decomposition models, controlled first-order root decomposition; thus, current paradigms of ecosystem C dynamics and model parameterization require revision. |
| 资助项目 | State Key Program of China[2016YFD0300904] ; State Key Program of China[2016YFA0600800] ; Natural Science Foundation of China[31500361] ; Natural Science Foundation of China[31830015] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDB-SSW-DQC002] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000446764200065 |
| 出版者 | NATL ACAD SCIENCES |
| 源URL | [http://210.72.129.5/handle/321005/123336]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Sun, Tao; Wang, Zhengwen |
| 作者单位 | 1.Univ Gavle, Sect Biol, SE-80176 Gavle, Sweden 2.Univ Paul Valery Montpellier, Ctr Ecol Fonct & Evolut, Ecole Prat Hautes Etud, UMR 5175,CNRS,Univ Montpellier, F-34293 Montpellier, France 3.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China 4.Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA 5.Univ Helsinki, Dept Forest Sci, FIN-00014 Helsinki, Finland 6.Northeast Forestry Univ, Laoshan Forest Stn, Harbin 150040, Heilongjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Tao,Hobbie, Sarah E.,Berg, Bjoern,et al. Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(41):10392-10397. |
| APA | Sun, Tao.,Hobbie, Sarah E..,Berg, Bjoern.,Zhang, Hongguang.,Wang, Qingkui.,...&Hattenschwiler, Stephan.(2018).Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(41),10392-10397. |
| MLA | Sun, Tao,et al."Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.41(2018):10392-10397. |
入库方式： OAI收割
来源：沈阳应用生态研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。