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DGE Newsletter, June 2006
News from Jasper Ridge
Field & Berry Groups
The research projects at Jasper Ridge are an outdoor extension of those on Stanford's inner campus. On June 13, representatives from the new Woods Institute of the Environment visited the Ridge to view posters and hear about some of the projects. Among them were the following:
June 1: The Lab Meeting discussion was centered around two papers by I. Fung et al. published in the J. Geophyical Res. in 1983 & 1987. Both were concerned with the Atmosphere-Biosphere Exchange of CO2, and were among the first to demonstrate that satellite data of high spatial and temporal resolution can be used to provide quantitative information about seasonal and longer-term variations of photosynthetic activity on a global scale.
Tasting: Adam Wolf brought about 15 Power Bars of different brands. Their content varied from five to 23 gm of protein/bar and included both Girl and Boy bars. Most had a chocolate flavor, but some were caramel or spicy. Because many people in the Field Lab were away analyzing the harvest at Jasper Ridge, Asner's group joined us for this delicious Tasting. Included were Post Doc Natalie Boelman who is about to leave for a position at the Lamont-Doherty Geological Observatory of Columbia University, NY. and Lab Tech, Kim Carlson who will be enrolled in a PhD program at Yale Univ. in September. Kim plans to spend part of the summer in Thailand learning Thai Massage. Former student, Dave Lobell also happened to stop by and showed off photos of his very new baby son, Kai.

Test application of the laser-induced fluorescence transient (LIFT) instrument
Joe Berry, Roland Pieruschka (Carnegie Instit. & Forschungszentrum Juelich), Zbigniew Kolber and Dennis Klimov (MBARI)
Summary: The photosynthetic machinery that enables plants to convert sunlight to chemical energy has two means of dissipating light energy that exceeds a leaf's needs—fluorescence, which is the instantaneous re-emission of light of another wavelength, and heat. Leaf fluorescence can also be actively stimulated with an external light source, and this has become a powerful technique for studying photosynthesis by individual leaves. A new experiment at the Sun field station is extending the approach to plant canopies by inducing fluorescence with an eye-safe laser.

Asner's Group

Right: Roland Pieruschka with the LIFT instrument

June 2: Asner's Lab welcomed two new members this week while it loses two (see June 1, Tasting). The new people are Lab. Tech Matthew Jones who recently received his MS from the Univ. Montana at Missoula. Programmer Sam Keene is on loan from Boston Univ. where he is a PhD candidate in Electrical Engineering.
Robin Martin is in Hawaii for three months doing eddy covariance tower and remote sensing work.  She and Greg are also joining forces with the National Tropical Botanical Garden on Kauai to study the diversity of canopy biochemicals in tropical forest species from around the world. 
Chris Carlson and Melissa Kunz are also joining Asner's lab this month as technicians.  Chris will be based in the Stanford labs, and Melissa will be based in our Hawaii laboratories.

Below: Roland measuring fluorescence at the leaf level to compare with LIFT values.

June 14: Eben Broadbent writes from Lima, Peru that he has been admitted to a PhD program in Stanford's Dept. of Biological Sciences working in the Field lab.  His interests are in dynamics of tropical ecosystems undergoing anthropogenic and climate related impacts, especially in Amazonia.
Eben's wife, Angelica Almeyda (Asner lab) having successfully passed her qualifications, is now a PhD candidate in the Dept. Anthropological Sciences and begins two years of field work for her dissertation.
This summer Angelica and Eben will be conducting two research projects in the tri-national frontier of the Brazilian, Bolivian and Peruvian Amazon.  They will be working on: (1) land use impacts of small holders in the tri-national area and (2) looking into relationships among foliar nutrients and soil parameters along a 50 year chronosequence in a lowland forest in Pando, Bolivia.

Claire Lunch and the equipment she constructed to sample and measure net exchange of CO2 and water vapor.

June 23: We bid a fond farewell to Lab. Tech. Alison Appling who will be entering a PhD program at Duke University this fall. She has been primarily involved with the Jasper Ridge project for the last two years, but also got the cataloging of our small library off to a good start. Her sendoff party, illustrated below, includes Bob Haxo, half of Ulli Seibt and Claire Lunch. June 19: If you haven't checked in with Dave Kroodsma lately at www.rideforclimate.com, you're missing a great adventure. As of this date, he is in Bogota, Columbia at 8500 ft. elevation and is right at home because this city has become hooked on bicycles.
Archives and PDF Archives of past Newsletters,
Click on photos for enlargement.
Editor Jan Brown, e-mail: jbrown@globalecology.stanford.edu