Some of the required functionality includes: 

• Having a separate web page where the trend for the whole lake is visualized. There should be a line with the average and 2 lines indicated +/- standard deviations 
• There should be a way to toggle between trends by site or by lake/region/basin
• Backend functionality to support the trends by region
• There should be trends for zooplankton data as well. The average is for all the types. 

Note: This are not final requirements might need to be updated.