DOI: 10.5281/zenodo.18661615
title: Net photosynthesis from sensitivity runs of a simulated intertidal macroalgal canopy

description: 10,000 runs of a 14 day period for a simulated macroalgal canopy. Field descriptions are as follows below. Parameter values vary at random within defined boundaries. The output is summarized by the column netpsn: the average daily carbon flux due to photosynthesis.

TAI, fracshore and photoperday are derived from other variables. For example, TAI depends on frond allometry, frond density and frond height.

 

Field                                         Description                                                                                  Units

a.intercept                            Allometry intercept                                                                                m2

a.slope                                   Allometry slope                                                                                      m

kappa                                      Canopy attenuation coefficient                                                         TAI-1

daylength                                                                                                                                              hours

days                                          Days simulated                                                                                    days

n.fronds                                 Density of fronds                                                                                  m-2

D.rate                                       Desiccation rate                                                                                    s-1

Shorelevel                           Height of algae on shore relative to LAT                                               m

hydration                              Rehydration rate of submerged fronds                                         % minute-1

alpha                                        Initial slope P-I curve                                                          mmol C (mmol photon)-1

Pmaxintercept                 Intercept for aerial Pmax with water content                              mmol C m-2 frond s-1

M2amp                                   M2 tidal amplitude                                                                                 m

Pmax                                        Maximum gross photosynthetic rate                                     mmol C m-2 frond s-1

f.mean                                    Frond height                                                                                              m

Isurf                                           Midday irradiance                                                                         mmol photon m-2 s-1

Pmax.slope                        Initial slope P-I curve                                                                   mmol C (mmol photon)-1

recoverythresh                Desiccation recovery threshold                                                                  %

resp                                           Respiration rate                                                                           mmol C g-1 s-1

S2amp                                    S2 tidal amplitude                                                                                 m

S2phase                                S2 tidal phase lag                                                                                   °

TSM                                           Thallus specific mass                                                                 g (dry mass) m-2

lambda                                  Water attenuation coefficient for light (PAR)                                      m-1

netpsn                                     Net photosynthesis                                                                         g C m-2 day-1

photo per day                   Photon flux per day                                                                      mmol photon m-2 day-1

fracshore                          Vertical position of fronds relative to high tide                                     fraction

TAI                                               Thallus area index                                                                                ratio