Table 2. Parameters and definitions.

Parameter	Definition, Units	Derivation	Reference
μmax	Maximum growth rate under steady-state, N-replete conditions, days-1	Slope of ln(Nt)-vs.-time plot, where Nt is cell density at time t
TR	Recovery time; estimated time until μmax is restored following resupply of N to N-starved cultures	Time when μR = μmax in a regression of μR-vs.-time plot, where μR is recovery growth rate
RS	Recovery competence score, dimensionless	(1/TR)/μmax
Fo	Minimum fluorescence yield, dark-acclimated state		[43]
Fm	Maximum fluorescence yield, dark-acclimated state		[43]
Fv	Variable fluorescence yield, dark-acclimated state	Fm—Fo	[43]
Fs	Fluorescence under actinic light equal to growth irradiance		[43]
Fm'	Maximum fluorescence under actinic light equal to growth irradiance		[43]
Fm'1s	Maximum fluorescence 1s after excitation under actinic light equal to growth irradiance		[44,45]
Fo'1s	Minimal fluorescence 1s after excitation under actinic light equal to growth irradiance		[44,45]
Fo'	Estimated minimal fluorescence under actinic light equal to growth irradiance	Fo'1s * {1 - [(Fm'1s - F'm)/Fm'1s]}	[44,45]
Fv/Fm	Maximum potential quantum yield of PS II photochemistry		[43]
σPSII'	Effective absorption cross-section of PSII under low actinic light (Å2 quanta-1)	Exponential rate of rise in FRRf fluorescence induction curve	[46]
σPSII'1s	Effective absorption cross-section of PSII under low actinic light (Å2 quanta-1) 1s after excitation under growth irradiance actinic light	Exponential rate of rise in FRRf fluorescence induction curve
ρ'	Excitation connectivity between PSII reaction centers under low actinic light	Sigmoidicity of FRRf fluorescence induction curve	[46]
qp	Photochemical quenching of fluorescence, fraction of open PSII	(Fm'—Fs)/(Fm'—Fo')	[43]
ETR	Rate of electron transfer from PSII at growth irradiance (I), e- PSII-1 s-1	σPSII' * I * qP	[47]
PSIIActive	Quantity of active PSII reaction centers at growth irradiance	Fo'1s/ σPSII'1s	[48]
1/τ	Rate constant for reopening of PSII reaction centers, s-1		[46]
ϕPSII	Quantum yield of PSII photochemistry	(Fm'—Fs)/Fm'	[49,50]
ϕNO	Quantum yield of constitutive, energy-independent non-photochemical excitation energy dissipation	Fs/Fm	[49,50]
ϕNPQ	Quantum yield of energy-dependent, regulated non-photochemical excitation energy dissipation	1 - (ϕPSII + ϕNO)	[49,50]