| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1111/gcb.13591 |
| Seasonality constraints to livestock grazing intensity. | |
| Fetzel T; Havlik P; Herrero M; Erb K-H | |
| 发表日期 | 2017 |
| 出处 | Global Change Biology 23 (4): 1636-1647 |
| 出版年 | 2017 |
| 语种 | 英语 |
| 摘要 | Increasing food production is essential to meet the future food demand of a growing world population. In the light of pressing sustainability challenges like climate change and the importance of the global livestock system for food security as well as GHG emissions, finding ways to increasing food production sustainably and without increasing competition for food crops is essential. Yet, many unknowns relate to livestock grazing, in particular grazing intensity, an essential variable to assess the sustainability of livestock systems. Here we explore ecological limits to grazing intensity (GI; i.e., the fraction of Net Primary Production consumed by grazing animals) by analysing the role of seasonality in natural grasslands. We estimate seasonal limitations to GI by combining monthly Net Primary Production data and a map of global livestock distribution with assumptions on the length of non-favourable periods that can be bridged by livestock (e.g., by browsing dead standing biomass, storage systems or biomass conservation). This allows us to derive a seasonality-limited potential GI, which we compare with the GI prevailing in 2000. We find that GI in 2000 lies below its potential on 39% of the total global natural grasslands, which has a potential for increasing biomass extraction of up to 181 MtC/yr. In contrast, on 61% of the area GI exceeds the potential, made possible by management. Mobilizing this potential could increase milk production by 5%, meat production by 4%, or contribute to free up to 2.8 Mio km² of grassland area at the global scale if the numerous socio-ecological constraints can be overcome. We discuss socio-ecological trade-offs, which may reduce the estimated potential considerably and require the establishment of sound monitoring systems and an improved understanding of livestock system’s role in the Earth system. |
| 主题 | Ecosystems Services and Management (ESM) |
| 关键词 | Grazing intensity, global livestock systems, seasonality, natural grasslands, food security, grassland management |
| URL | http://pure.iiasa.ac.at/id/eprint/14184/ |
| 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/130901 |
| 推荐引用方式 GB/T 7714 | Fetzel T,Havlik P,Herrero M,et al. Seasonality constraints to livestock grazing intensity.. 2017. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| FetzelEtal2016-Globa（1214KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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