Station LH = Huatajata. It can be seen in most of the graphs that the biomass of the four groups and the total biomass are very reduced at the surface (< 2 µg Chl-a /L) due to photo-inhibition generated by the excess of ultraviolet (UV) radiation, which is harmful to the photosynthesis process. Microalgae biomasses (which escape the strong solar radiation) increase towards the bottom. Green algae (Greens) dominate the water column as opposed to diatoms (Diatoms).

High concentrations at the bottom (> 16 µg/L) correspond to phytobenthos (algae attached to the sediment and/or Charas, the submerged macrophytes) or to suspended algae or Charas particles. At this time of the morning, the temperature is slightly higher at the surface due to solar heating (14.9°C) than at the bottom (14.1°C). Around midday, the thermal wind will increase, mixing the entire water column, which will have a homogeneous temperature from the surface to the bottom. Shallow stations (< 5 m) have the same behavior: phytoplankton biomass is always low at the surface and increases to the bottom, where solar radiation is less intense.

For this reason, it is not necessary to comment on every shallow station graph..... Only when something unusual is observed. The other legends will be filled later.