ArticleGlobal change biology2026
Global Change Reshapes Biosynthesis of LC-PUFA in Northern Lake Food Webs.
Article in Global change biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Global change is altering the physico-chemical characteristics of northern lakes through warming, shifting nutrient regimes, and increasing dissolved organic carbon (DOC). These changes are reshaping the trophic structure and nutritional quality of freshwater food webs. To investigate how such environmental gradients influence the production and trophic transfer of long-chain polyunsaturated fatty acids (LC-PUFA), we quantified LC-PUFA biosynthesis in 12 boreal lakes along a trophic gradient. Bayesian models were used to relate biosynthesis to phytoplankton biomass and community composition, while compound-specific stable hydrogen isotopes and fads2 gene expression were applied to distinguish dietary acquisition from endogenous n-3 LC-PUFA synthesis in zooplankton and planktivorous fish. We further extrapolated LC-PUFA biosynthesis across 643 boreal and subarctic lakes covering a~7°C temperature gradient and a 1-160 μg L
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