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Life Sciences Commons

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Boise State University

2010

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Articles 31 - 33 of 33

Full-Text Articles in Life Sciences

Wintering Area Dde Source To Migratory White-Faced Ibis Revealed By Satellite Telemetry And Prey Sampling, Michael A. Yates, Mark R. Fuller, Charles J. Henny, William S. Seegar, Jaqueline Garcia Jan 2010

Wintering Area Dde Source To Migratory White-Faced Ibis Revealed By Satellite Telemetry And Prey Sampling, Michael A. Yates, Mark R. Fuller, Charles J. Henny, William S. Seegar, Jaqueline Garcia

Raptor Research Center Publications and Presentations

Locations of contaminant exposure for nesting migratory species are difficult to fully understand because of possible additional sources encountered during migration or on the wintering grounds. A portion of the migratory white-faced ibis (Plegadis chihi) nesting at Carson Lake, Nevada continues to be exposed to dichloro-diphenyl-dichloroethylene (DDE) with no change, which is unusual, observed in egg concentrations between 1985 and 2000. About 45 to 63% of the earliest nesting segment shows reduced reproductive success correlated with elevated egg concentrations of > 4 µg/g wet weight (ww). Local prey (primarily earthworms) near nests contained little DDE so we tracked the migration and …


Grappling With Climate Change: Impacts To Heritage Resources, Lauren Meyer, Pei-Lin Yu, Randall Skeirik, Virginia Salazar-Halfmoon Jan 2010

Grappling With Climate Change: Impacts To Heritage Resources, Lauren Meyer, Pei-Lin Yu, Randall Skeirik, Virginia Salazar-Halfmoon

Pei-Lin Yu

17th century adobe walls collapsing at Tumacácori; historic inscriptions rapidly eroding at El Morro; ancestral pueblo field houses at Bandelier impacted by significant soil erosion. Is this deterioration and loss the result of a lack of proper maintenance, a misunderstanding of the needs of fragile site materials, the cumulative effects of 'normal' deterioration, or the result of random and unpredictable natural events and material failures? Could any (or all) of it be related to climate change? As a cultural resource manager, climate change is a difficult matter to grapple with. Can one comfortably say that a wall collapse is the …


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 Jan 2010

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 …