Light Competition and Biodiversity Loss Cause Saturation Response of Aboveground Net Primary Productivity to Nitrogen Enrichment
文献类型：期刊论文
| 作者 | Ma, Fangfang1,2; Song, Bing1,2; Quan, Quan1,2; Zhang, Fangyue1,2; Wang, Jinsong1; Zhou, Qingping3; Niu, Shuli1,2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 125期号:3页码:12 |
| 关键词 | Ammonium toxicity biodiversity loss ecosystem function light limitation N addition gradient soil acidification |
| ISSN号 | 2169-8953 |
| DOI | 10.1029/2019JG005556 |
| 通讯作者 | Niu, Shuli(sniu@igsnrr.ac.cn) |
| 英文摘要 | The continually increasing nitrogen (N) deposition is expected to cause a saturation response of ecosystem aboveground net primary productivity (ANPP). However, its underlying mechanisms, especially for the decrease of ANPP under high N addition rate, remain poorly understood. A field manipulative experiment was conducted to investigate the response of ANPP to six levels of N addition rate (0, 2, 4, 8, 16, and 32 g N center dot m(-2)center dot year(-1)) in an alpine meadow during 2015-2017. We specifically explored four possible mechanisms, light limitation, biodiversity loss, soil acidification, and ammonium toxicity, underlying the saturation response of ANPP to increasing N addition. The results showed that ANPP increased linearly with N addition rates in 2015, while converted to a saturation response with N addition rates in 2016-2017. With increasing N addition rate, species richness and soil pH significantly reduced while standing litter, light limitation, and NH4+-N content significantly increased. Under low N addition rate (N0 to N4), increases in N availability significantly improved ANPP although it was partly offset by the indirect N effect via increasing litter accumulation and thus light competition. Under high N addition rate (N8-N32), the decreases in species richness mostly explained the N-induced reduction in ANPP, leading to a saturation response. This study provides empirical evidences on interpreting N saturation response of ANPP in the alpine meadow. The findings will advance our current understanding of N enrichment effects on ANPP and benefit biogeochemical models in parameterization and benchmark analysis. |
| WOS关键词 | ECOSYSTEM CARBON FLUXES ; PLANT DIVERSITY ; SPECIES RICHNESS ; PHOSPHORUS ADDITIONS ; USE EFFICIENCY ; CLIMATE-CHANGE ; GRASSLAND ; DEPOSITION ; WATER ; ACIDIFICATION |
| 资助项目 | National Science Foundation of China[31625006] ; National Key R&D Program of China[2016YFC0501803] ; National Key R&D Program of China[2017YFA0604801] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000522353000003 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Science Foundation of China ; National Key R&D Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/133265]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Dept Resources & Environm, Beijing, Peoples R China 3.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Fangfang,Song, Bing,Quan, Quan,et al. Light Competition and Biodiversity Loss Cause Saturation Response of Aboveground Net Primary Productivity to Nitrogen Enrichment[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2020,125(3):12. |
| APA | Ma, Fangfang.,Song, Bing.,Quan, Quan.,Zhang, Fangyue.,Wang, Jinsong.,...&Niu, Shuli.(2020).Light Competition and Biodiversity Loss Cause Saturation Response of Aboveground Net Primary Productivity to Nitrogen Enrichment.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(3),12. |
| MLA | Ma, Fangfang,et al."Light Competition and Biodiversity Loss Cause Saturation Response of Aboveground Net Primary Productivity to Nitrogen Enrichment".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.3(2020):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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