SYMBIOTIC N2 FIXATION IN GREAT LAKES REGION SPECKLED ALDER

Project Overview
Project Abstract: 
I assess the importance of N-fixing bacteria Frankia as the proportional availability of fixed N to mineralized N using a flow-through method. The purpose of this study is to measure Frankia N-fixation and soil N-mineralization; framing the Frankia-Alnus symbiosis in the context of meeting alder N demands at the stand level. Hypotheses: I will determine the proportional importance of N2 fixation and soil N availability for meeting speckled alder N demand. I hypothesize (1) that N-fixation partially meets alder stand N demand. If N-fixation plays a significant role in alder growth, I hypothesize (2) that N-fixation will be inversely correlated with N-mineralization because alders preferentially invest energy into N-uptake over N-fixation when N-mineralization rates are high.
Project Details
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Investigator Info
Investigators: 
Funding agency: 
University of Michigan EEB Block Grant
Years research project active: 
2013 to 2014