Climate-induced increases in micronutrient availability for coral reef fisheries

Robinson, James P.W., Maire, Eva, Bodin, Nathalie, Hempson, Tessa N., Graham, Nicholas A.J., Wilson, Shaun K., MacNeil, M. Aaron, and Hicks, Christina C. (2022) Climate-induced increases in micronutrient availability for coral reef fisheries. One Earth, 5 (1). pp. 98-108.

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Abstract

Climate change is transforming coral reefs, threatening supply of essential dietary micronutrients from small-scale fisheries to tropical coastal communities. Yet the nutritional value of reef fisheries and climate impacts on micronutrient availability remain unclear, hindering efforts to sustain food and nutrition security. Here, we measure nutrient content in coral reef fishes in Seychelles and show that reef fish are important sources of selenium and zinc and contain levels of calcium, iron, and omega-3 fatty acids comparable with other animal-source foods. Using experimental fishing, we demonstrate that iron and zinc are enriched in fishes caught on regime-shifted macroalgal habitats, whereas selenium and omega-3 varied among species. We find substantial increases in nutrients available to fisheries over two decades following coral bleaching, particularly for iron and zinc after macroalgal regime shifts. Our findings indicate that, if managed sustainably, coral reef fisheries could remain important micronutrient sources along tropical coastlines despite escalating climate impacts.

Item ID: 74648
Item Type: Article (Research - C1)
ISSN: 2590-3322
Keywords: aquatic foods, coral bleaching, fish biomass, food security, marine heatwave, nutrition, regime shift, small-scale fisheries, thermal stress, tropical fisheries
Copyright Information: © 2021 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Date Deposited: 07 Dec 2022 01:17
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 30%
41 ENVIRONMENTAL SCIENCES > 4101 Climate change impacts and adaptation > 410199 Climate change impacts and adaptation not elsewhere classified @ 30%
30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3005 Fisheries sciences > 300599 Fisheries sciences not elsewhere classified @ 40%
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