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Fig. 3. The log-transformed local Sherwood number (Shx) and
local Reynolds number (Rex) at the upstream and downstream
locations of Vallisneria spiralis and Vallisneria americana
in a flat and twisted configuration at (A) 17.1 mmol m3
CO2 and (B) 1.71 mmol m3 CO2. Solid
lines are model fits for V. spiralis, dash-dotted lines are for
V. americana in a flat configuration, and the broken lines are for
V. americana in a twisted configuration. The thin dotted line
indicates the theoretical turbulent Shx, and the thick
dotted line indicates the theoretical laminar Shx based on
Eqn 9. Values are means ±
s.e.m. N and symbols are as in
Fig. 2.