Empirical Basis for the Measurement of Plant Metabolic and Functional Status using HyspIRI

Shawn Paul Serbin, University of Wisconsin - Madison, serbin@wisc.edu (Presenter)
Eric L Kruger, University of Wisconsin - Madison, elkruger@wisc.edu
Aditya Singh, University of Wisconsin - Madison, singh22@wisc.edu
Philip A Townsend, University of Wisconsin - Madison, ptownsend@wisc.edu

We present evidence for the ability to use HyspIRI to measure and map plant metabolic rates and functional traits. A new analytical approach (iterative PLS, iPLS) is presented that facilitates robust prediction and identification of critical absorption features for plant traits. We illustrate our approach to linking lab/field measurements and lab spectroscopic data to imaging spectroscopy. Finally, we show empirical evidence of the capacity of HyspIRI-like measurements to estimate key vegetation characteristics across a wide variety of species, functional types, ecosystems and climatic conditions.

We illustrate results for the determinants of photosynthetic capacity - namely the maximum rates of RuBP carboxylation (Vcmax) and regeneration (Jmax) - as well as plant structural properties (LMA, leaf mass per area) and biochemistry (nitrogen concentration, leaf isotopic ratios of nitrogen-15, lignin, cellulose).

Presentation Type:  Poster

Session:  Coupled Processes at Land-Atmosphere-Ocean Interfaces   (Mon 4:00 PM)

Associated Project(s): 

• Townsend, Phil: An integrative approach for quantifying the effects of disturbance on regional forest carbon cycling ...details
• Townsend, Phil: Characterization of forest functional types and their role in mediating ecosystem response to environmental change ...details
• Townsend, Phil: Detection of key leaf physiological traits using spectroscopy and hyperspectral imagery ...details

Poster Location ID: 79