通过构建承载能力警报指数来评估非洲草原的畜牧用途可持续性
Shiqi Yu1, Xiwang Zhang2, Yansui Liu3
1Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, State Key Laboratory of Spatial Datum, Faculty of Geographical Science and Engineering, Henan University, Zhengzhou, China.
Nature communications
|December 30, 2025
概括
过度放牧威胁着非洲的草原. 一个新的指数显示,51%的牧场产能过剩,敦促转移到未充分利用的南部牧场,以平衡牲畜需求和生态系统健康.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 可持续的资源管理可持续的资源管理
背景情况:
- 过度放牧对全球草原生态系统构成重大威胁.
- 评估草原承载能力对于可持续的畜牧管理至关重要,但在大陆范围内具有挑战性.
- 现有的方法往往缺乏长期趋势分析,阻碍了准确的可持续性评估.
研究的目的:
- 开发一个草原承载能力预警指数来评估生态系统的可持续性.
- 评估2001年至2020年非洲各地草原承载能力的时空动态.
- 确定过度放牧和不足利用的地区,以告知管理策略.
主要方法:
- 开发一种新的草原承载能力预警指数.
- 使用20年的数据 (2001-2020年) 分析草原承载能力的时空变化.
- 评估非洲各地的草原利用水平和牲畜料需求.
主要成果:
- 地表生物质的增加与非洲各地牲畜料需求的增加不匹配.
- 观察到草原利用的区域差异很大.
- 超过51%的非洲草原面临着高压,超过承载能力,特别是在北非.
- 大约有26.53%的草原,主要在南非,未得到充分利用.
结论:
- 建议将畜牧业发展的战略转移到南非.
- 跨区域合作可以通过利用南部牧场,帮助缓解北非的过度放牧问题.
- 为了平衡经济增长与草原的可持续性,需要有针对性的干预和区域规划.
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