Erratum to: Apparent PS II absorption cross-section and estimation of mean PAR in optically thin and dense suspensions of Chlorella

Erratum to: Photosynth Res DOI 10.1007/s11120-014-0040-6

The following errors crept in during the production of the original publication:

The first term in Eq. 17 should read <σ> (instead of σ), and the first term in Eq. 18 should read σ (instead of <σ>), as follows:

$$ \begin{aligned} <\sigma> & = \sigma \cdot \frac{1}{2} \cdot \frac{{1 - \left( {\frac{{I_{d} }}{{I_{0} }}} \right)^{2} }}{{1 - \frac{{I_{d} }}{{I_{0} }}}} = \sigma \cdot \frac{1}{2} \cdot \frac{{\left( {1 + \frac{{I_{d} }}{{I_{0} }}} \right) \cdot \left( {1 - \frac{{I_{d} }}{{I_{0} }}} \right)}}{{1 - \frac{{I_{d} }}{{I_{0} }}}} \\ & = \frac{ \sigma }{2} \cdot \left( {1 + \frac{{I_{d} }}{{I_{0} }}} \right) \\ \end{aligned} $$

(17)

$$ \begin{aligned} \sigma & = C \cdot <\sigma> = \frac{2}{{1 + \frac{{I_{d} }}{{I_{0} }}}} \cdot <\sigma> \\ C & = \frac{2}{{1 + \frac{{I_{d} }}{{I_{0} }}}} \\ \end{aligned} $$

(18)