即使低水平的树木覆盖也可以提高西非的饮食质量
Bowy den Braber1, Charlotte Hall1,2, Martin Brandt1
1Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen K, Denmark.
PNAS nexus
|February 26, 2024
概括
西非地区树木覆盖面的增加增加了儿童富含维生素A的食物消费. 这项研究量化了树木覆盖对营养的影响,即使是在森林稀疏的干旱地区.
科学领域:
- 环境科学 环境科学
- 营养科学 营养科学
- 农业科学 农业科学
背景情况:
- 森林提供可持续的食物来源,但它们在西非等树木稀疏覆盖地区的营养影响未得到充分研究.
- 现有的方法难以准确量化干旱地区的树木覆盖面,限制了营养评估.
- 了解树木覆盖的作用对于可持续的粮食系统至关重要,尤其是在脆弱的地区.
研究的目的:
- 估计不同树木覆盖水平对西非儿童 (12-59个月) 富含维生素A的食物消费的影响.
- 解决干旱地区生态系统中森林营养方面的知识差距.
- 研究贫困等社会经济因素如何影响树木覆盖和饮食摄入量之间的关系.
主要方法:
- 利用高分辨率的PlanetScope图像 (3m分辨率) 进行详细的树木覆盖率估计.
- 综合树木覆盖数据与人口和健康调查数据,来自超过15000个家庭.
- 采用统计分析来确定树木覆盖,贫困水平,生态区域和富含维生素A的食物消费之间的相关性.
主要成果:
- 儿童食用富含维生素A的食物的可能性随着树木覆盖的增加而增加,覆盖率达到16.8%.
- 树木覆盖率从8.8%增加到16.8%,与消费概率从0.45增加到0.53.3%相关.
- 树木覆盖对消费的影响因贫困状况和生态区域而异,低地森林-草原和萨赫勒-苏丹地区之间存在显著差异.
结论:
- 树木和森林对于可持续的粮食系统和改善营养至关重要,即使在西非干旱地区树木覆盖有限.
- 考虑到当地贫困水平和生态区域的有针对性的干预措施可以利用树木资源改善儿童营养.
- 准确的树木覆盖率评估对于理解和促进农林业和森林景观的营养益处至关重要.
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