| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1038/nclimate2177 |
| Nutrient availability as the key regulator of global forest carbon balance. | |
| Fernandez-Martinez M; Vicca S; Janssens IA; Sardans J; Luyssaert S; Campioli M; Chapin III FS; Ciais P | |
| 发表日期 | 2014 |
| 出处 | Nature Climate Change 4 (6): 471-476 |
| 出版年 | 2014 |
| 语种 | 英语 |
| 摘要 | Forests strongly affect climate through the exchange of large amounts of atmospheric CO2. The main drivers of spatial variability in net ecosystem production (NEP) on a global scale are, however, poorly known. As increasing nutrient availability increases the production of biomass per unit of photosynthesis and reduces heterotrophic respiration in forests, we expected nutrients to determine carbon sequestration in forests. Our synthesis study of 92 forests in different climate zones revealed that nutrient availability indeed plays a crucial role in determining NEP and ecosystem carbon-use efficiency (CUEe; that is, the ratio of NEP to gross primary production (GPP)). Forests with high GPP exhibited high NEP only in nutrient-rich forests (CUEe = 33 +/- 4%; mean +/- s.e.m.). In nutrient-poor forests, a much larger proportion of GPP was released through ecosystem respiration, resulting in lower CUEe (6 +/- 4%). Our finding that nutrient availability exerts a stronger control on NEP than on carbon input (GPP) conflicts with assumptions of nearly all global coupled carbon cycle-climate models, which assume that carbon inputs through photosynthesis drive biomass production and carbon sequestration. An improved global understanding of nutrient availability would therefore greatly improve carbon cycle modelling and should become a critical focus for future research. |
| 主题 | Ecosystems Services and Management (ESM) |
| URL | http://pure.iiasa.ac.at/id/eprint/10921/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130044 |
| 推荐引用方式 GB/T 7714 | Fernandez-Martinez M,Vicca S,Janssens IA,et al. Nutrient availability as the key regulator of global forest carbon balance.. 2014. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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