Dorado fluorescence & biolum sections.

In all plots, the contour is the high Chl band. The way I usually interpret these plots is:
- bg is the background biolum and corresponds to dinoflagellates (auto- or heterotrophic)
- nbflash low is the number of individual flashes of somewhat low intensity (related to larvaceans in campaigns I've looked at) 
- nbflash high is the number of individual flashes of high intensity, related to copepods and small jellies.
Those were derived from night surveys and my understanding until now was that dinos don't biolum during the day, and the surveys I had looked at until now always had bgdinos very low for daytime surveys. Meaning that bg may correspond to some zoo instead of dinos.

It seems to me like bg and fluo are actually slightly offset. The highest Chl values are near the top isoline, whereas the highest bgdinos is near the bottom isoline. There is also a temporal offset. Which means that organisms generating bg are likely heterotrophic dinos (if they can biolum during the day) or very numerous low-flash intensity zooplankton (larvacean??). Very possible since the pattern for bg & nbflashes low is far too similar (and if there's a ton of these zoo, their flashes blend and that becomes background). Or there could be both hetero dinos and zoo (?).
Last, nbflash high indicates that there are bigger zoo / copepods deeper, which is interesting (although I have no memory of how these numbers relate to previous campaigns, note also that the colorbars are different for the 2 nbflash plots).