South: Lab Work Following Sampling
- Put date on all samples requiring a written-in date
- Put depth on zooplankton samples (if different from label)
We sample at the deepest part of the lake, taking a temperature and oxygen profile at meter intervals from the surface to within 1 meter of the bottom using a YSI Pro-ODO temp/DO meter. We sample biweekly during open water and approximately every five weeks during ice cover.
Protocol Log: Prior to 2011, we used a YSI Model 58 temp/DO meter.
Light (PAR) extinction coefficient is calculated by linearly regressing ln (FRLIGHT (z)) on depth z where the intercept is not constrained. FRLIGHT(z) = LIGHT(z) / DECK(z) where LIGHT(z) is light measured at depth z and DECK(z) is light measured on deck (above water) at the same time.
Dumping Light Data