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 instrument of limnology turns 150 today. The Secchi disk, the black and white plate at …
We don’t know about you, but these last few days before Christmas are the prime time to scramble for last-second gifts. So, really, let us just say “You’re Welcome” for lifting that stress off your shoulders with what we’re about to show you. This is all you need: That’s right, folks, that is a Center …
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 their numbers couldn’t grow large enough to keep algae from clouding our waters. Combined with …
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 provided below: 1 – Pietro Angelo Secchi, dropped the first disk off the side …