1. US Geological Survey, Western Ecological Research Center, Dixon Field Station, 800 Business Park Drive, Suite D, Dixon, CA 95620 USA;
2. US Geological Survey, Western Ecological Research Center, Santa Cruz Field Station, 2885 Mission Street, Santa Cruz, CA 95060 USA
3. US Geological Survey, Western Ecological Research Center, Dixon Field Station, 800 Business Park Drive, Suite D, Dixon, CA 95620 USA