Climate Change: Challenge of Invasive Species Pam Fuller Florida Integrated Science Center U.S. Department of the Interior U.S. Geological Survey

Changes in Habitat Suitability Water temperature, depth, velocity, and timing Intensity and timing of hydrologic and fire regimes Physical, chemical, and biological components of habitat Advantage to invasive species: many are habitat generalists

Response of Plants and Animals Climate change will shift Where species are located: range shifts Timing of biological events: phenology Biotic interactions: predation and competition

Climate Change and Invasive Species Climate change alters Means of transport and introduction Establishment of additional species Impact of existing invasive species Distribution of existing invasive species Effectiveness of control strategies (modified from Hellmann et al. 2007)

Nonnative Diseases & Pathogens: Ichthyophonus Protozoan parasite Yukon chinook salmon Jim Winton, Western Fisheries Research Center

Prevalence of Ichthyophonus in the Yukon River System

Study comparing growth of worldwide ecotypes Found in all 50 states Different habitat here Stems are shorter toward northern range limit Purple loosestrife is likely to spread northward with climate change, too dry for southern expansion Purple Loosestrife and Climate Change Northernmost limit in North America, Amos, northern Quebec Purple loosestrife grows in gaps of white poplar forest in Turkey  light gap Beth Middelton, National Wetlands Research Center

USGS Database Resources Pam Fuller, Florida Integrated Science Center

Predicting Range Shifts Catherine Jarnevich, Fort Collins Science Center Kudzu Current distribution with future habitat

Conclusions Prevention, detecting, monitoring, and controlling invasive species is a resource-intensive management endeavor Complicated by uncertainties regarding climate change Understanding and working to minimize these uncertainties will become increasingly important with further environmental stressors Baseline information on species distribution is critical to future management success Modeling efforts to predict future scenarios will become increasingly important to resource managers USGS will continue to work with partners to maintain and improve databases and provide research to help managers make more informed decisions