PubMed · 10451720
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D E Collins. Comparing test preparation methods.. https://pubmed.ncbi.nlm.nih.gov/10451720/
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The current extinction of many of Earth's large terrestrial carnivores has left some extant prey species lacking knowledge about contemporary predators, a situation roughly parallel to that 10,000 to 50,000 years ago, when naive animals first encountered colonizing human hunters. Along present-day carnivore recolonization fronts, brown (also called grizzly) bears killed predator-naive adult moose at disproportionately high rates in Scandinavia, and moose mothers who lost juveniles to recolonizing wolves in North America's Yellowstone region developed hypersensitivity to wolf howls. Although prey that had been unfamiliar with dangerous predators for as few as 50 to 130 years were highly vulnerable to initial encounters, behavioral adjustments to reduce predation transpired within a single generation. The fact that at least one prey species quickly learns to be wary of restored carnivores should negate fears about localized prey extinction.
PURPOSE: Despite being well suited to provide the breadth of care needed in rural areas, few general internists become rural physicians. Little formal rural residency training is available and no formal curricula exist. For over 25 years the University of Washington School of Medicine has provided elective WWAMI (Washington, Wyoming, Alaska, Montana, Idaho) rural residency rotations to expose residents to the rewards and challenges of rural practice. This study identified the characteristics of outstanding rural residency rotations. METHOD: The key preceptors at three outstanding rural residency sites were interviewed about their experiences, teaching strategies, and opinions about curriculum. Their responses were categorized. Seven university-based residents and eight training at WWAMI sites recorded and rated the value of over 1,500 learning encounters. RESULTS: The preceptors agreed that outstanding rotations were led by enthusiastic preceptors who served as role models for excellence. These preceptors provided residents with meaningful responsibilities and emphasized independent decision making based on the history and physical examination. They stressed supervised independence and self-directed learning with frequent structured feedback for residents. The residents rated the learning value of patient encounters in rural locations significantly higher than that of those in university clinics. CONCLUSIONS: Exceptional rural residency experiences involve excellent role models who provide meaningful responsibility and emphasize core skills using a learner-centered approach. Rural training experiences should be supported, and the suggestions of outstanding preceptors should be used to develop and disseminate a curriculum that will better prepare residents for rural practice.
As newly formed landscapes evolve, physical and biological changes occur that are collectively known as primary succession. Although succession is a fundamental concept in ecology, it is poorly understood in the context of aquatic environments. The prevailing view is that lakes become more enriched in nutrients as they age, leading to increased biological production. Here we report the opposite pattern of lake development, observed from the water chemistry of lakes that formed at various times within the past 10,000 years during glacial retreat at Glacier Bay, Alaska. The lakes have grown more dilute and acidic with time, accumulated dissolved organic carbon and undergone a transient rise in nitrogen concentration, all as a result of successional changes in surrounding vegetation and soils. Similar trends are evident from fossil diatom stratigraphy of lake sediment cores. These results demonstrate a tight hydrologic coupling between terrestrial and aquatic environments during the colonization of newly deglaciated landscapes, and provide a conceptual basis for mechanisms of primary succession in boreal lake ecosystems.