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Full-Text Articles in Biology
High Predation On Small Populations: Avian Predation On Imperiled Salmonids, Ann-Marie Osterback, Danielle Frechette, Andrew Shelton, Sean Hayes, Morgan Bond, Scott A. Shaffer, Jonathan Moore
High Predation On Small Populations: Avian Predation On Imperiled Salmonids, Ann-Marie Osterback, Danielle Frechette, Andrew Shelton, Sean Hayes, Morgan Bond, Scott A. Shaffer, Jonathan Moore
Faculty Publications, Biological Sciences
Generalist predators can contribute to extinction risk of imperiled prey populations even through incidental predation. Quantifying predation on small populations is important to manage their recovery, however predation is often challenging to observe directly. Recovery of prey tags at predator colonies can indirectly provide minimum estimates of predation, however overall predation rates often remain unquantifiable because an unknown proportion of tags are deposited off‐colony. Here, we estimated overall predation rates on threatened wild juvenile steelhead Oncorhynchus mykiss by generalist adult Western Gulls Larus occidentalis in six central California (USA) watersheds. We estimated predation rates by gulls from the recapture of …
The Effect Of Water Temperature On Drilling And Ingestion Rates Of The Dogwhelk Nucella Lapillus Feeding On Mytilus Edulis Mussels In The Laboratory, Luke P. Miller
Faculty Publications, Biological Sciences
In highly seasonal intertidal habitats, changes in temperature through the year may drive substantial shifts in feeding and growth rates of organisms. For the dogwhelk Nucella lapillus, attacking and consuming Mytilus edulis mussels can take hours or days, depending on temperature. Handling time of dogwhelks feeding on mussels is therefore greatly affected by ocean temperature. I recorded attack time in the laboratory, partitioned into drilling and consumption time, for juvenile dogwhelks across a range of seawater temperatures representative of field seawater temperatures during the main growing seasons of summer and autumn. The combined length of a drilling attack and …
Poised To Prosper? A Cross-System Comparison Of Climate Change Effects On Native And Non-Native Species Performance, Cascade J. B. Sorte, Ines Ibáñez, Dana M. Blumenthal, Nicole A. Molinari, Luke P. Miller, Edwin D. Grosholz, Jeffrey M. Diez, Carla M. D'Antonio, Julian D. Olden, Sierra J. Jones, Jeffrey S. Dukes
Poised To Prosper? A Cross-System Comparison Of Climate Change Effects On Native And Non-Native Species Performance, Cascade J. B. Sorte, Ines Ibáñez, Dana M. Blumenthal, Nicole A. Molinari, Luke P. Miller, Edwin D. Grosholz, Jeffrey M. Diez, Carla M. D'Antonio, Julian D. Olden, Sierra J. Jones, Jeffrey S. Dukes
Faculty Publications, Biological Sciences
Climate change and biological invasions are primary threats to global biodiversity that may interact in the future. To date, the hypothesis that climate change will favour non-native species has been examined exclusively through local comparisons of single or few species. Here, we take a meta-analytical approach to broadly evaluate whether non-native species are poised to respond more positively than native species to future climatic conditions. We compiled a database of studies in aquatic and terrestrial ecosystems that reported performance measures of non-native (157 species) and co-occurring native species (204 species) under different temperature, CO2 and precipitation conditions. Our analyses revealed …