Environmental Engineering Reference
In-Depth Information
Acknowledgements The assistance of J.B. Churchill in preparing the data set for analysis and the
generation of Fig.
15.2
are greatly appreciated.
Appendix
The development of RULE (Gardner 1999) has been an evolutionary process. The
current incarnation of this programme, version 4.0, provides extensive changes to
the format of the output, data files for statistical summaries, and the inclusion of a
new neutral model described in this manuscript (the RwC model selected as option
“Y” when executing code). Programme documentation, example input and output
files, and the source code for Qrule may be obtained from
http://www.al.umces.edu/
Qrule
. Also available, R4Q, a series of procedures written for the R software
(R Development Team 2008). It is hoped that the release of the source code will
allow alternative neutral models to be suggested and tested to better understand the
relationship between pattern and process at landscape scales. The Open Software
License (
http://www.opensource.org/licenses/index.php
) applies to the distribution,
use, and possible alteration of Qrule.
