San Francisco State University

About: San Francisco State University is a education organization based out in San Francisco, California, United States. It is known for research contribution in the topics: Population & Planet. The organization has 5669 authors who have published 11433 publications receiving 408075 citations. The organization is also known as: San Francisco State & San Francisco State Normal School.

Large-scale recovery of an endangered amphibian despite ongoing exposure to multiple stressors

Abstract: Amphibians are one of the most threatened animal groups, with 32% of species at risk for extinction. Given this imperiled status, is the disappearance of a large fraction of the Earth’s amphibians inevitable, or are some declining species more resilient than is generally assumed? We address this question in a species that is emblematic of many declining amphibians, the endangered Sierra Nevada yellow-legged frog (Rana sierrae). Based on >7,000 frog surveys conducted across Yosemite National Park over a 20-y period, we show that, after decades of decline and despite ongoing exposure to multiple stressors, including introduced fish, the recently emerged disease chytridiomycosis, and pesticides, R. sierrae abundance increased sevenfold during the study and at a rate of 11% per year. These increases occurred in hundreds of populations throughout Yosemite, providing a rare example of amphibian recovery at an ecologically relevant spatial scale. Results from a laboratory experiment indicate that these increases may be in part because of reduced frog susceptibility to chytridiomycosis. The disappearance of nonnative fish from numerous water bodies after cessation of stocking also contributed to the recovery. The large-scale increases in R. sierrae abundance that we document suggest that, when habitats are relatively intact and stressors are reduced in their importance by active management or species’ adaptive responses, declines of some amphibians may be partially reversible, at least at a regional scale. Other studies conducted over similarly large temporal and spatial scales are critically needed to provide insight and generality about the reversibility of amphibian declines at a global scale.

Heart rate variability after isocaloric exercise bouts of different intensities.

Abstract: Purpose:To examine cardiac autonomic modulation, via heart rate variability (HRV), after exercise bouts at 50% (LO) and 80% (HI) of O2 reserve (O2R).Methods:Thirteen male volunteers (age: 25.7 ± 3 yr) exercised on a treadmill at either LO or HI (randomly assigned) on separate days, expending

Rethinking Self-Awareness in Cultural Competence: Toward a Dialogic Self in Cross-Cultural Social Work:

Abstract: The cultural competence approach has grown significantly in the North American human service professions. The reliance of social workers on cultural awareness to block the influence of their own culture in the helping process entails three problematic and conflicting assumptions, namely, the notion of human being as cultural artifact, the use of self as a technique for transcending cultural bias, and the subject-object dichotomy as a defining structure of the worker-client relationship. The authors contend that there are conceptual incoherencies within the cultural competence model's standard notion of self-awareness. The conceptualization of a dialogic self may unsettle the hierarchical worker-client relationship and de-essentialize the concept of culture. Cross-cultural social work thus becomes a site where client and worker negotiate and communicate to cocreate new meanings and relationships.