Constraints to nitrogen acquisition of terrestrial plants under elevated CO2
文献类型：期刊论文
| 作者 | Feng, Zhaozhong; Ruetting, Tobias; Pleijel, Hakan; Wallin, Goeran; Reich, Peter B.; Kammann, Claudia I.; Newton, Paul C. D.; Kobayashi, Kazuhiko; Luo, Yunjian; Uddling, Johan |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2015-08 |
| 卷号 | 21期号:8页码:3152-3168 |
| 关键词 | carbon dioxide crops diversity FACE fertilization forest grassland growth dilution meta-analysis nitrogen |
| 英文摘要 | A key part of the uncertainty in terrestrial feedbacks on climate change is related to how and to what extent nitrogen (N) availability constrains the stimulation of terrestrial productivity by elevated CO2 (eCO(2)), and whether or not this constraint will become stronger over time. We explored the ecosystem-scale relationship between responses of plant productivity and N acquisition to eCO(2) in free-air CO2 enrichment (FACE) experiments in grassland, cropland and forest ecosystems and found that: (i) in all three ecosystem types, this relationship was positive, linear and strong (r(2) = 0.68), but exhibited a negative intercept such that plant N acquisition was decreased by 10% when eCO(2) caused neutral or modest changes in productivity. As the ecosystems were markedly N limited, plants with minimal productivity responses to eCO(2) likely acquired less N than ambient CO2-grown counterparts because access was decreased, and not because demand was lower. (ii) Plant N concentration was lower under eCO(2), and this decrease was independent of the presence or magnitude of eCO(2)-induced productivity enhancement, refuting the long-held hypothesis that this effect results from growth dilution. (iii) Effects of eCO(2) on productivity and N acquisition did not diminish over time, while the typical eCO(2)-induced decrease in plant N concentration did. Our results suggest that, at the decennial timescale covered by FACE studies, N limitation of eCO(2)-induced terrestrial productivity enhancement is associated with negative effects of eCO(2) on plant N acquisition rather than with growth dilution of plant N or processes leading to progressive N limitation. |
| 研究领域[WOS] | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| WOS记录号 | WOS:000358485200028 |
| 公开日期 | 2016-03-08 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32281]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Feng, Zhaozhong,Ruetting, Tobias,Pleijel, Hakan,et al. Constraints to nitrogen acquisition of terrestrial plants under elevated CO2[J]. GLOBAL CHANGE BIOLOGY,2015,21(8):3152-3168. |
| APA | Feng, Zhaozhong.,Ruetting, Tobias.,Pleijel, Hakan.,Wallin, Goeran.,Reich, Peter B..,...&Uddling, Johan.(2015).Constraints to nitrogen acquisition of terrestrial plants under elevated CO2.GLOBAL CHANGE BIOLOGY,21(8),3152-3168. |
| MLA | Feng, Zhaozhong,et al."Constraints to nitrogen acquisition of terrestrial plants under elevated CO2".GLOBAL CHANGE BIOLOGY 21.8(2015):3152-3168. |
入库方式： OAI收割
来源：生态环境研究中心
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