Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment
文献类型：期刊论文
| 作者 | Zheng, Zhi2; Bai, Wenming ; Zhang, Wen-Hao
|
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2019 |
| 卷号 | 437期号:1-2页码:341-354 |
| 关键词 | Nitrogen deposition Community dynamics Functional groups Inner Mongolia steppe |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-019-03989-z |
| 文献子类 | Article |
| 英文摘要 | AimsShifts of plant community composition with enhanced atmospheric nitrogen (N) deposition in grasslands have occurred globally. Despite extensive studies on the effects of enhanced N deposition on plant species composition of grassland community, few studies have focused on belowground ecological processes and duration of N addition.MethodsIn situ long-term (14-year: 2004-2017) and short-term (4-year: 2014-2017) N-addition experiments in the same sites were conducted in a temperate steppe of northern China. We investigated the effects of N-addition on plant community composition and root traits by comparing results of short-term and long-term N addition.ResultsNitrogen-evoked changes in plant community composition were primarily dependent on N-addition duration and functional groups. Short-term N addition favored growth of grasses, and depressed growth of forbs, while long-term N addition favored growth of sedges, and concurrently depressed growth of grasses and forbs, ultimately leading to a time-dependent shift of plant community composition from co-dominance by grasses and forbs to dominance by grasses, then to dominance by sedges. Similar to the observed aboveground biomass, short-term N addition led to an increase in the relative belowground biomass (the proportion of belowground biomass of individual plant to community belowground biomass) of the grass Stipa krylovii and a decrease in the relative belowground biomass of the forb Artemisia frigida, respectively. In contrast, long-term N addition enhanced the relative belowground biomass of the sedge Carex korshinskyi, and reduced the relative belowground biomass of the grass S. krylovii and the forb A. frigida. Moreover, traits of absorptive fine roots (first-two orders) in the three species (grass: S. krylovii; forb: A. frigida; sedge: C. korshinskyi) that are representatives of three functional groups differed in their responses to short-term and long-term N addition, thus rendering them differentially competitive for acquisition of belowground resource. The changes in root traits of the three species in responses to N addition of varying duration were associated with their relative aboveground biomass.ConclusionsRoot traits play important roles in mediating the competition for belowground resource and changes in plant community composition of temperate grasslands under N enrichment. Our findings provide novel insights into N-deposition-induced changes in steppe community composition by linking root traits of functional groups and duration of N addition. |
| 学科主题 | Agronomy ; Plant Sciences ; Soil Science |
| 出版地 | DORDRECHT |
| 电子版国际标准刊号 | 1573-5036 |
| WOS关键词 | NUTRIENT FORAGING STRATEGIES ; BIODIVERSITY LOSS ; PLANT DIVERSITY ; DEPOSITION ; RESPONSES ; LIGHT ; PRECIPITATION ; PATTERNS ; DRIVERS ; EXPLAIN |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000463608700023 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31830011, 31470466] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19888]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xinning 810008, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Inner Mongolia Res Ctr Prataculture, Beijing 100093, Peoples R China 4.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhi,Bai, Wenming,Zhang, Wen-Hao. Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment[J]. PLANT AND SOIL,2019,437(1-2):341-354. |
| APA | Zheng, Zhi,Bai, Wenming,&Zhang, Wen-Hao.(2019).Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment.PLANT AND SOIL,437(1-2),341-354. |
| MLA | Zheng, Zhi,et al."Root trait-mediated belowground competition and community composition of a temperate steppe under nitrogen enrichment".PLANT AND SOIL 437.1-2(2019):341-354. |
入库方式： OAI收割
来源：植物研究所
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