Responses to High Irradiance Contribute to the Decline of the Spring Diatom Maximum

The effect of high irradiance was studied with cultures and samples from natural populations of the colonial diatom Asterionella formosa Hass. The fluorescence ratio $F_v : F_m$, where $F_v$ is the difference between DCMU-enhanced fluorescence $(F_m)$ and normal, dark-adapted fluorescence $(F_0)$, w...

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