Climate-induced increases in micronutrient availability for coral reef fisheries

Robinson, J.P.W. and Maire, E. and Bodin, N. and Hempson, T.N. and Graham, N.A.J. and Wilson, S.K. and MacNeil, M.A. and Hicks, C.C. (2022) Climate-induced increases in micronutrient availability for coral reef fisheries. One Earth, 5 (1). pp. 98-108. ISSN 2590-3330

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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 Type:
Journal Article
Journal or Publication Title:
One Earth
Subjects:
ID Code:
165181
Deposited By:
Deposited On:
27 Jan 2022 10:56
Refereed?:
Yes
Published?:
Published
Last Modified:
04 May 2022 02:40