Snow Loop at Critical Zone Tree-1

submitted by: phartsough

This is a loop of images taken twice per day of a instrumented tree at the Southern Sierra Critical Zone Observatory located in the Kings River Experimental Watershed. The loop shows snow accumulation and melt dynamics at the instrumented tree, CZT-1, a White Fir located at about 6500ft in the southern Sierras.

Carbonated Oceans

submitted by: ucsandiego

As carbon dioxide is pumped into the atmosphere, about one-third of the excess is taken up by the oceans, where it converts to an acidic form with potentially dangerous ecosystem consequences.

http://explorations.ucsd.edu/Features/2009/Carbonated_Oceans/

Pressure bomb

submitted by: schulzbu
This video is a visual 10 step instruction manual how to use a pressure bomb for measuring water pressure in the xylem of transpiring leaves. It is geared towards undergraduate students working in plant physiology labs as well as viewers who are interested in plant biology. Water in the xylem is under negative pressure. This tension can be measured by a “pressure bomb”. Tension pressure in a non-transpiring leaf is “equivalent” to water potential of cells surrounding the xylem...

Time lapse videomicrography of the life cycle of Dictostelium

submitted by: Arjumond
Distinct stages of Dictyostelium discoideum life cycle can be seen. As the video starts there is a wave of bacterial growth across the agar. From the implantation site of the spores, you can see the myxamoeba migrating out consuming the E.coli. As the E.coli is consumed you can see a clearing in the agar after which the myxamoeba using chemical signaling form multicellular slugs. The slugs can be seen migrating across the field of view, with the formation of a sorocarp in the upper right...

Scientists From Across the Globe Warn of Drastic Water Shortages

submitted by: ucsandiego
In the Sierra Neveda, snowpack will shrink by 30 to 90 percent by the end of the century. On the other side of the planet, in the Himalayas, about 70 percent of glaciers are set to disappear. These changes are both caused by climate change and will lead to dramatic water shortages for hundreds of millions of people across the globe, scientists said during a press conference Wednesday at UC San Diego. http://ucsdnews.ucsd.edu/thisweek/2009/05/11_icemelt.asp

The Well Dressed Ape book review

submitted by: sciencegoddess

Joanne describes her listening experience of the audio version of life-science-popular-book-writer Hannah Holmes' "The Well Dressed Ape: A Natural History of Myself" as the more comprehensive and funnier updated version of the 1960s "The Naked Ape" by Desmond Morris. Joanne's goal with book reviews is to be positive and intelligent and encourage the reluctant science reader to pick up a book and to let science enthusiasts know what is available on the bookshelves now.