LEA visits Kezar Pond once a year in late August. This year, both chlorophyll and total phosphorus concentrations were lower than their long-term averages. Clarity is not reported because, the Secchi disk hit bottom before dissapearing, making the clarity reading unreliable. The average deep-water phosphorus value was less than 10 ppb above surface water phosphorus values, which suggests phosphorus recycling was not problematic. Long-term trend analysis indicates that total phosphorus, clarity, and chlorophyll-a concentrations in Kezar Pond are stable. Clarity trend analysis is performed using data for those years the Secchi disk did not hit the bottom. This year’s surface water temperature was warmer than last year’s surface water temperature. Oxygen depletion was not observed in 2024. Gloeotrichia echenulata colonies were not observed in 2024.
Kezar Pond’s surface water chlorophyll (ppb), phosphorus (ppb), and Secchi depth (meters) data comparison. Colored areas represent the long-term range of values, from minimum to maximum. Area thickness indicates frequency of measurements at that value. Area thickness increases as more measurements are reported at that value. The vertical black line represents the long-term average value. The large red dot represents 2024’s average value.
Gloeotrichia echinulata (a type of cyanobacteria (blue-green algae) commonly found in low-nutrient waters) can be seen with the naked eye. Gloeo density is reported as a value ranging from 0 – 6, based on the number of Gloeo colonies seen through a Secchi scope. Higher values indicate more Gloeo colonies. Gloeotrichia echenulata colonies were not observed in Kezar Pond in 2024.
