2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/24/2021 | 2:00 PM - 3:30 PM | Declining diversity of wild-caught species puts dietary nutrient supplies at risk | Virtual Platform

Declining diversity of wild-caught species puts dietary nutrient supplies at risk

Although biodiversity loss adversely influences a wide array of ecosystem functions, how declines in wild-caught species diversity influences nutrients supplied to people who depend on wild foods is poorly understood. Freshwater fisheries provide over 150 million people across the world with their primary sources of essential nutrients but are increasingly threatened by hydropower development and overharvesting. Here we analyze the impact of declining harvest biodiversity on nutrient supplies from fish, using detailed information from the Peruvian Amazon, where inland fisheries provide a critical source of dietary nutrients. Realistic extinction scenarios revealed that the impacts of biodiversity loss on nutrient supplies depended on compensatory growth, trophic dynamics and functional diversity. When small sedentary species compensated for declines in large migratory species, fatty acid supplies increased, while zinc and iron supplies decreased. In contrast, the probability of failing to maintain supplies, or nutrient supply risk, increased when species were nutritionally unique, or when communities exhibited low response diversity. Our results show that trait-based regulations and public health policies need to consider the vital role of biodiversity in sustaining the nutritional benefits people regularly derive from wild foods such as inland fisheries.

Interdisciplinary
Biodiversity
Socio-ecological systems

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Presenters/Authors

Sebastian Heilpern (), Cornell University, s.heilpern@cornell.edu;