Conceptual model showing the likely effects of CO₂ concentration, current velocity and shoot density on gross production (GPP) and respiration (R).

<p>(↑) Increase, () Decrease, (↑↑) Significant increase. Current pH means the actual sea pH (pH = 8.1). Forecasted pH means the ocean acidification scenario forecasted by the Intergovernmental Panel on Climate Change (pH = 7.65).</p

Effects of ocean acidification and hydrodynamic conditions on carbon metabolism and dissolved organic carbon (DOC) fluxes in seagrass populations - Fig 2

<p><b>Effects of seawater acidification and current velocity on (A) gross primary production (GPP), (B) respiration (R) and (C) net primary production (NPP).</b> LV = Low velocity, MV = Medium velocity, HV = High velocity, CpH = Current pH, FpH = Forecasted pH.</p

Effects of seawater acidification and current velocity on net DOC flux.

<p>LV = Low velocity, MV = Medium velocity, HV = High velocity, CpH = Current pH, FpH = Forecasted pH.</p

Daily water properties in the two large reservoirs at different times across the experimental period.

<p>Daily water properties in the two large reservoirs at different times across the experimental period.</p

Relationship between current velocity and DOC flux.

<p>CpH = Current pH, FpH = Forecasted pH.</p

Median values of the explanatory variables on different year-scenarios.

<p>Circles represent the median values predicted for the available years-scenarios by the hydrodynamic model. Triangles represent the values predicted for the years 2010 and 2100 removing the Delta Works (NDW).</p

Biomass standing stocks, time series.

<p>Colored bar show the intertidal (green) and subtidal (blue) realized biomass stock estimated from the different scenarios for the present extension of the basin. Broken-line bars on the years 1968 and 1983 include the area that was cut-off from the beginning of the Oesterdam works in 1979 (25 km² between 1968 and 1983 and 12 km² between 1983 and 1986). Empty bars on the years 2010 and 2100 show the result of the scenarios simulated removing the Delta Works.</p

Simplified diagram of the open-water mesocosm system.

<p>Simplified diagram of the open-water mesocosm system.</p

Two-way ANOVA results for the effect of seawater acidification and current velocity (CV) on gross primary production (GPP), respiration (R), net primary production (NPP), dissolved organic carbon flux (DOC) and biomass loss (BL).

<p>Two-way ANOVA results for the effect of seawater acidification and current velocity (CV) on gross primary production (GPP), respiration (R), net primary production (NPP), dissolved organic carbon flux (DOC) and biomass loss (BL).</p

Summary of seawater chemistry in the different treatments.

<p>Summary of seawater chemistry in the different treatments.</p