I recently stumbled accross this neat little command-line program to download videos from YouTube.com and other video sites.
Today I'm teaching at the first Bureau of Meteorology eReefs satellite data training workshop in Townsville QLD. I've spent the last week or so preparing and putting togther a sensible (hopefully) series of short lessons.
I used to host this site on Weebly as it's pretty much set and forget website hosting, but since i've been using git and markdown more and more in my daily work I've decided to move to GitHub and Jekyll.
Chlorophyll a (chl) measurements are a useful estimate of algal biomass and have been used extensively for decades. Turner designs (http://www.turnerdesigns.com/ fluorometers are used extensively to quantify chl as they are fast, reliable, and relatively cheap. Nevertheless, errors can be introduced if the fluorometer isn't calibrated with a commercially available chlorophyll a standard (e.g. crystallised Chlorophyll a from Anacystis nidulans algae from Sigma Chemical Company) regularly. The procedure described here is appropriate for algal chl in the marine environment. Scientists who employ this or other methods to measure pigments should make themselves aware of the issues that surround fluorescence based techniques and make appropriate decisions about the use of this technology for their application based on the scientific requirements and constraints of their individual programs.