Blog Redux: Secchi Disk Celebrates 150 Years of Clarity

Tomorrow will mark the one hundred and fifty-second birthday of the Secchi disk. We dusted off this post from two years ago to tell you all about our favorite scientific instrument. Enjoy! (Originally published April 20, 2015) – A time-honored Read More …

Video: Up-Close Look at Lake Mendota Water Clarity

On June 4th, after a week of clear-water conditions in Lake Mendota, some of us here at Hasler Lab decided that our window for swimming in clear water was closing. So we decided to take an up-close and personal reading Read More …

Monitor Mendota: Water Clarity, Daphnia on the Rebound

Last week on this blog, we wondered if Lake Mendota’s clear water phase was a thing of the past. You see, last year, the algae-eating native zooplankton,¬†daphnia pulicaria were so diminished by predation from the invasive spiny water flea, that Read More …

Fish Fry Day: Daphnia Update & Perch (H2O) Purifiers?

Lake Monona is crystal clear, while Mendota stays murky and, on Wednesday, we asked you to help us monitor Lake Mendota as we wait to see if the native zooplankton, daphnia pulicaria, can rally and clear up the situation after Read More …

CFL’s Crowd-Sourced Secchi Slideshow: Happy Earth Day!

We asked, and you answered! It’s Earth Day and we’re continuing our shout out to the inventor of limnology’s most ubiquitous instrument. (Full captions to photos are posted below) Click on images above for slideshow. Fuller captions describing images are Read More …