Withdrawal Statement
The authors have withdrawn their manuscript owing to the fact that the manuscript has not gone through the US Geological Survey review and approval process required prior to posting and is, therefore, withdrawn. Therefore, the authors do not wish this work to be cited as reference for the project. If you have any questions, please contact the corresponding author.
Competing Interest Statement
The authors have declared no competing interest.
Copyright
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. This article is a US Government work. It is not subject to copyright under 17 USC 105 and is also made available for use under a CC0 license.