**Troubleshooting Tips**

**PV_Curve_Fitting_5.6.xls**

Pressure/volume curvefitting based on the approach of Schulte and Hinckley (1985);Schulte,P. J., andT. M. Hinckley. 1985. A Comparison of Pressure-Volume Curve Data-Analysis Techniques. Journal of Experimental Botany 36:1590-1602. Now with uncertainty estimates 6 October 2008

**Leaf Energy Balance**

Calculates leaf energy balance components (e.g. leaf temperature, transpiration, boundary-layer conductance, net radiation) from stomatal resistance, leaf size, shape, angle and solar radiation, windspeed, air temperature and relative humidity. Includes a worksheet for easy sensitivity analysis of different factors.

**Green Fraction from Digital Images**

Executable program that calculates the green fraction in a digital image, e.g.fractional green cover. Based on the blue (B), green (G) and red (R)bands, 'Fast' gives the fraction of pixels in an image for which G-R>0 and 'Slow 'allows the user to specify the criteria for green pixels (e.g.2*G-R-B>0). The later version also allows for a variable threshold that can be set for different ambient light conditions. Can be run on all files in a list.

Other Useful (and Free) Software

R - software environment for statistical computing and graphics

Bio7 - modelling environment with ImageJ and R embedded

SAM - statistical tools for spatial analysis in macroecology

ECOBAS - modular modelling and documentation environment

DIVA-GIS - geographic information system

Tiberius - neural networks

GP Studio - genetic programming

WinBugs - Bayesian modelling

WinDig - digitizing program to extract data from graphs (also see

This material is based upon work supported by the National Science Foundation under Grant No. 0317139

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation