Environmental change, aquatic conditions, and household food security: Evidence from Lake Malawi.

IF 3.2 3区 社会学 Q1 DEMOGRAPHY
Population and Environment Pub Date : 2025-03-01 Epub Date: 2025-01-24 DOI:10.1007/s11111-025-00476-9
Heather Randell, Clark Gray, Monica Grant, Galina Shinkareva, Wondwosen M Seyoum, Catherine O'Reilly
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引用次数: 0

Abstract

Food insecurity is a key barrier to improving global health and achieving sustainable development. Nearly 30% of the world's population experiences moderate or severe food insecurity, and rates of hunger have risen in recent years. Environmental change is a major factor driving this increase, as warming air and water temperatures, extreme weather, and land use change can threaten food production. We argue that an important, yet underexplored, pathway between environmental change and food insecurity is through aquatic conditions and fisheries. We focus on Malawi, which is heavily dependent on fish consumption and experiences high rates of food insecurity. By linking nationally representative household survey data from 2010 through 2020 to remotely-sensed chlorophyll and lake surface temperature data from Lake Malawi, we examine the relationship between changing aquatic conditions and food security among households located near the lakeshore. We find that warmer-than-average lake temperatures are negatively associated with multiple food security indicators including Food Consumption Score, self-reported adequacy of food consumption, consumption of dried fish, and consumption of animal protein during four of more days in the prior week. These findings provide insight into the linkages between environmental change, aquatic conditions, and population health, and can inform policies to reduce food insecurity, particularly among fisheries-dependent communities.

环境变化、水生条件和家庭粮食安全:来自马拉维湖的证据。
粮食不安全是改善全球健康和实现可持续发展的主要障碍。世界上近30%的人口处于中度或重度粮食不安全状态,近年来饥饿率有所上升。环境变化是推动这一增长的一个主要因素,因为空气和水温升高、极端天气和土地利用变化会威胁到粮食生产。我们认为,环境变化与粮食不安全之间的一个重要但尚未得到充分探索的途径是通过水生条件和渔业。我们的重点是马拉维,该国严重依赖鱼类消费,粮食不安全率很高。通过将2010年至2020年的全国代表性家庭调查数据与马拉维湖的遥感叶绿素和湖表面温度数据联系起来,我们研究了湖岸附近家庭中不断变化的水生条件与粮食安全之间的关系。我们发现,高于平均水平的湖泊温度与多个食品安全指标呈负相关,包括食物消费得分、自我报告的食物消费充足性、鱼干的消费和动物蛋白的消费,在前一周的四天或四天以上。这些发现有助于深入了解环境变化、水生条件和人口健康之间的联系,并可为减少粮食不安全的政策提供信息,特别是在依赖渔业的社区。
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来源期刊
CiteScore
5.80
自引率
6.10%
发文量
18
期刊介绍: Population & Environment is the sole social science journal focused on interdisciplinary research on social demographic aspects of environmental issues. The journal publishes cutting-edge research that contributes new insights on the complex, reciprocal links between human populations and the natural environment in all regions and countries of the world. Quantitative, qualitative or mixed methods contributions are welcome. Disciplines commonly represented in the journal include demography, geography, sociology, human ecology, environmental economics, public health, anthropology and environmental studies. The journal publishes original research, research brief, and review articles.
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