A string choosing the data to load.
| Data name (data_name) | Data Description |
| chem | Lake Chemistry |
| crustacean | Crustacean Zooplankton Biomass |
| meta | Lake-specific metadata (type, location, morphology) |
| nutrient | Lake Nutrients |
| phyto | Phytoplankton Biomass Observations |
| rotifer | Rotifer Zooplankton Biomass |
| secchi | Lake Secchi Depth Observations |
| tempdo | Temperature and Dissolved Oxygen Profiles |
| met | Lake-specific Meterology (air temp, wind, precip, etc) |