This is an update to a previous posting on March 25, 2011. 

Project Description:
Tropical forest ecosystems have been found to be undergoing widespread changes. 
Of particular 
concern is the increasing dominance of lianas (woody climbing vines). I am 
investigating whether 
increasing CO2 is a viable explanation for increasing liana dominance and, if 
so, through what 
mechanism CO2 favors lianas over trees. The study is being conducted at the 
Smithsonian Tropical 
Research Institute (STRI) in Panama. Liana and tree species are growing in 
open-top plant growth 
chambers and exposed to elevated levels of CO2. 

Position Description:
Research assistants will have the opportunity to work closely with a PhD 
student to carry out a 
major research project. You will learn the design and operation of an elevated 
CO2 growth 
chamber array, including instrumentation to measure CO2 levels and the 
photosynthetic activity of 
plants. Other duties may include plant identification and collection, caring 
for seedlings, and 
measurement of plant traits. This is a volunteer position intended for persons 
looking to gain field 
and research experience. Partial reimbursements for travel may be available 
depending on the 
circumstances.

Qualifications:
Ability to work long days in the field under tropical conditions (intense heat, 
rain, sun, 
biting/stinging insects), and a basic understanding of biology and/or ecology. 
Spanish language 
proficiency is preferred but not required. Positions start immediately and will 
run to mid-June. 

Please send short cover letter (including earliest start date) and resume (with 
references) to Dave 
Marvin ([email protected]) or visit http://www-personal.umich.edu/~marvs/ for 
more 
information. Applications accepted until May 1st. 

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