Figure 2.

Polychromatic and photoregulatory interactions of QUVB (230–320 nm), QUVA (320–400 nm), and QP AR (400–700 nm) on primary production and DNA integrity in phytoplankton. IK is the minimum QPAR requirement to saturate rates of photosynthesis; IB is the minimum QPAR light requirement to photoinhibit rates of photosynthesis