newsletter.
DGE Beacon, March 2004
DGE Seminars
Carnegie, 4 PM
Special News
New Building Updates
March 10, Susan Trumbone, Department of Earth System Science, UC Irvine. Her talk was titled, Carbon cycling in Amazonian tropical forests — some surprises. We learned that it has been possible to date the age of trees from the rate of radioactive decay of C14 in their tissue since the test ban treaty 50 years ago. This procedure has been expecially useful in the Amazon Basin where many tree species do not form growth rings. In her studies to estimate the amount of carbon stored in Amazonia forests, she found that some trees there are as old as 1400 years.
On Feb. 27 Chris and Paul met with DGE personnel to explain what may be happening during the next few weeks as we prepare to take occupancy. In order to vacate some of the present labs as soon as possible, many items will be moved to the new warehouse during the week of March 1. We then did a walk-through to see where individuals may be — especially in the office spaces on the second floor. By March 3, a blue-print was laid out for the students and technitions to chose where their desk space may be. Faculty offices have been assigned. Outside, new plantings are being added as time allows. Frequent rains have given the plants a good start.
A spell of sunny weather started on March 8 hastened the planting, but also made it easier to move from the former labs and offices into the new ones during the following week. By March 17, everyone had moved to the new offices and labs.
Field Lab Meetings Wednesdays, 12-1 PM
Mar. 3, Jason Funk reviewed a paper by Gamon, J.A., C.B. Field, M.L. Goulden, K.L. Griffin, A.E. Hartley, G. Joel, J. Peñuelas, & R. Valentini. 1995. Relationships between NDVl, canopy structure, and photosynthesis in three California vegetation types. Ecological Applications 5:28-41. Different varieties of potato chips were compared with the hope that some would be more nutritious in terms of fat and salt content. Unfortunately, there was little difference except for texture.
March 10, John Juarez reviewed a paper by Field, C.B., F.S. Chapin,III, N.R. Chiariello, E.A. Holland, & H.A. Mooney. 1996. The Jasper Ridge CO2 experiment: Design and Motivation. Pages 121-145 in G.W. Koch & H.A. Mooney, eds. Carbon Dioxide and Terrestrial ecosystems. Academic Press, San Diego. He compared these earlier studies on Jasper Ridge with the carbon exchange experiments going on today. Chris pointed out how significant improvements in equipment have modified experimental design.
Because of the current heat wave, an icecream tasting was welcomed. Since all were vanilla flavored, the main differences were in texture with the more expensive brands being richer. However, a non-dairy brand containing soy protein was very good.
Open lab on ground floor
Open desk spaces & closed offices on 2nd floor
March 17, Lisa Moore reviewed the paper by Hungate, B.A., E.A. Holland, R.B. Jackson, F.S. Chapin, H.A. Mooney, & C.B. Field. 1997. The fate of carbon in grasslands under carbon dioxide enrichment. Nature 388:576-579. This was the first lab meeting in our new building. We tasted/toasted this event and St. Patrick's Day with several non-alcholic beers.
Editor Jan Brown
e-mail: jbrown@globalecology.stanford.edu