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Full-Text Articles in Life Sciences
How Low Can You Go (And Live): Determining The Sub-Lethal Exposure Time To Desiccation In Snowberry Maggot Flies (Rhagoletis Zephyria), Alison Klimke, Anna Marie Yanny
How Low Can You Go (And Live): Determining The Sub-Lethal Exposure Time To Desiccation In Snowberry Maggot Flies (Rhagoletis Zephyria), Alison Klimke, Anna Marie Yanny
Scholars Week
The fruit infesting snowberry maggot (Rhagoletis zephyria) inhabits a broad range of habitats across the northern United States, including the humid and arid parts of Washington State. Pupating snowberry maggots (the most vulnerable life stage) exhibit local adaptation, with flies being more desiccation resistant east than west of the Cascades. Previous experiments have measured this difference at eight days after the larvae leave the fruit. However, desiccation impacts on survival may occur much earlier. To better understand the mechanism(s) by which flies protect themselves from desiccation we need to study flies at a sub-lethal level of stress, as dying flies …
Feeding Success Of Harbor Seals In Relation To Hunting Technique At Whatcom Creek, Mackenna Newmarch
Feeding Success Of Harbor Seals In Relation To Hunting Technique At Whatcom Creek, Mackenna Newmarch
Scholars Week
Factors that influence hunting success of seals and sea lions are underrepresented in studies of animal behavior. This is a critical interaction to understand when evaluating the top-down effects of pinnipeds on endangered Pacific salmon (Oncorhynchus spp.). In the Pacific Northwest, harbor seals (Phoca vitulina) consume a very large number of individual salmon, species that are a valuable resource and the subject of costly restorative efforts. A salmon hatchery in Whatcom Creek estuary of downtown Bellingham, Washington, attracts harbor seals that prey on returning adult Pacific salmon. The convenient location and small size of the site allows consistent observation of …
Examining The Relationship Between Climate And Seasonal Stream Thermal Regimes In A High Desert Ecosystem, Hannah Moore, Melody Feden
Examining The Relationship Between Climate And Seasonal Stream Thermal Regimes In A High Desert Ecosystem, Hannah Moore, Melody Feden
Scholars Week
Climate change is negatively affecting ecosystems around the world, and in the coming years, scientists predict that these changes will only intensify and accelerate. In the western mountains of North America, climate change projections predict elevated temperatures, reduced snowpack, and earlier snowmelt. Elevated air temperatures have the propensity to affect water temperatures in sensitive freshwater ecosystems. Temperature increases may cause streams to reach the upper thermal limit for many aquatic organisms, such as aquatic invertebrates and fish, and result in death or dispersal for these organisms. This makes the availability of cold-water refugia in streams that much more important for …
Can Omnivores Mediate The Effects Of Degradation?, Hannah Moore
Can Omnivores Mediate The Effects Of Degradation?, Hannah Moore
Scholars Week
Omnivores feed at multiple trophic levels and have large effects on community structuring and stability. The magnitude and direction of such effects, whether omnivores stabilize or destabilize communities, remains unresolved. Shifts in omnivore diet and trophic position may be of particular importance to community stability in degraded habitats, where resources are sparse. For example, omnivores may reduce the severity and duration of community responses to degradationby dampening the effects of any disturbance-mediated trophic cascade. The relatively simple food webs of freshwater systems are ideal for studying trophic ecology, and in the western U.S., streams are heavily degraded by overgrazing, beaver …