Allochthonous marsh subsidies enhances food web productivity in an estuary and its surrounding ecosystem mosaic.

Pheophytin, an indicator of dead phytoplankton, was also highest in freshwater and lowest in emergent salt marsh, but this effect was marginally significant ( F 5 , 30 = 2.34, P = 0.066; Means ± SD: freshwater = 15.84 ± 9.79 μg/L, tidal-forested = 10.39 ± 3.40 μg/L, transitional = 8.91 ± 4.42 μg/L, emergent salt marsh = 5.00 ± 4.28 μg/L, mudflat = 11.44 ± 10.44 μg/L, eelgrass = 5.03 ± 2.85 μg/L).

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