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Full-Text Articles in Life Sciences
Non-Native Salmonids Affect Amphibian Occupancy At Multiple Spatial Scales, David S. Pilliod, Blake R. Hossack, Peter F. Bahls, Evelyn L. Bull, Paul Stephen Corn, Grant Hokit, Bryce A. Maxell, James C. Munger, Aimee Wyrick
Non-Native Salmonids Affect Amphibian Occupancy At Multiple Spatial Scales, David S. Pilliod, Blake R. Hossack, Peter F. Bahls, Evelyn L. Bull, Paul Stephen Corn, Grant Hokit, Bryce A. Maxell, James C. Munger, Aimee Wyrick
Biology Faculty Publications and Presentations
Aim The introduction of non-native species into aquatic environments has been linked with local extinctions and altered distributions of native species. We investigated the effect of non-native salmonids on the occupancy of two native amphibians, the long-toed salamander (Ambystoma macrodactylum) and Columbia spotted frog (Rana luteiventris), across three spatial scales: water bodies, small catchments and large catchments.
Location Mountain lakes at ≥ 1500 m elevation were surveyed across the northern Rocky Mountains, USA.
Methods We surveyed 2267 water bodies for amphibian occupancy (based on evidence of reproduction) and fish presence between 1986 and 2002 and modelled …
Phenotypic Divergence During The Invasion Of Phyla Canescens In Australia And France: Evidence For Selection-Driven Evolution, Cheng-Yuan Xu, Mic H. Julien, Mohammad Fatemi, Christophe Girod, Rieks D. Van Klinken, Caroline L. Gross, Stephen J. Novak
Phenotypic Divergence During The Invasion Of Phyla Canescens In Australia And France: Evidence For Selection-Driven Evolution, Cheng-Yuan Xu, Mic H. Julien, Mohammad Fatemi, Christophe Girod, Rieks D. Van Klinken, Caroline L. Gross, Stephen J. Novak
Biology Faculty Publications and Presentations
Rapid adaptive evolution has been advocated as a mechanism that promotes invasion. Demonstrating adaptive evolution in invasive species requires rigorous analysis of phenotypic shifts driven by selection. Here, we document selection-driven evolution of Phyla canescens, an Argentine weed, in two invaded regions (Australia and France). Invasive populations possessed similar or higher diversity than native populations, and displayed mixed lineages from different sources, suggesting that genetic bottlenecks in both countries might have been alleviated by multiple introductions. Compared to native populations, Australian populations displayed more investment in sexual reproduction, whereas French populations possessed enhanced vegetative reproduction and growth. We partitioned …