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Table 2

Statistics of the beta distribution model (Eq. (3)) between nectar sugar mass per floret and air temperature.

Model k Parameter values ± 95% CI R2D AIC Model rank ΔAIC
    α mmax tmin topt tmax        
Null 2             32 029 2 118
Temperature 4 0.618 ± 0.515 180 ± 8 −11.0 ± 86.7 32.0 ± 0.5 36.3 ± 0.8 0.046 31 911 1 0

k: number of estimated parameters per model; CI: confidence interval; R2D: coefficient of determination calculated by the deviance ratio; model rank: model ranking by increasing AIC value; ΔAIC: AIC value minus the lowest AIC; α: parameter that determines the shape of the curve; mmax: maximum sugar mass secreted per floret at the optimum temperature topt; tmin, tmax: respectively minimum, maximum, temperature below and above which nectar secretion is nil.

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