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2016 ; 113
(11
): 2958-63
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gab.com Text
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Marine mixotrophy increases trophic transfer efficiency, mean organism size, and
vertical carbon flux
#MMPMID26831076
Ward BA
; Follows MJ
Proc Natl Acad Sci U S A
2016[Mar]; 113
(11
): 2958-63
PMID26831076
show ga
Mixotrophic plankton, which combine the uptake of inorganic resources and the
ingestion of living prey, are ubiquitous in marine ecosystems, but their
integrated biogeochemical impacts remain unclear. We address this issue by
removing the strict distinction between phytoplankton and zooplankton from a
global model of the marine plankton food web. This simplification allows the
emergence of a realistic trophic network with increased fidelity to empirical
estimates of plankton community structure and elemental stoichiometry, relative
to a system in which autotrophy and heterotrophy are mutually exclusive.
Mixotrophy enhances the transfer of biomass to larger sizes classes further up
the food chain, leading to an approximately threefold increase in global mean
organism size and an ?35% increase in sinking carbon flux.