作者单位:Ecology, Evolution & Marine Biology, University of California, Santa Barbara, CA, USA[1]Anchorage Forestry Sciences Laboratory, USDA/FS, Anchorage, AK, USA[2]Marine Science Institute, University of California, Santa Barbara, CA, USA[3]U.S. Geological Survey, Reno, NV, USA[4]Exotic and Invasive Weed Research Unit, USDA/ARS, Reno, NV, USA[5]