There is an on-going national movement away from nature-based recreation As a follow-up to their recent work demonstrating about a 25% decline in per capita visits to U.S. National Parks between 1987 and 2003, in this study, Oliver R.W. Pergams and Patricia A. Zaradic test whether this decline in U.S. National Park visits is an isolated incident or a good indicator with regard to how much people are visiting natural areas more generally. The authors examined 16 large national and international nature-related visitor and activity data sets, including visitation to Japanese national parks, recreational visits to all U.S. state parks, and total number of U.S. hunting and fishing licenses. In analyzing these data sets, Pergams and Zaradic found that nature-based recreation peaked between 1981 and 1991, and has been declining at a rate of between 1 and 1.3% per year since this peak, for a total decline of 18-25% to date. The similarities among these multiple and different measures suggest a general decline in visits to natural areas in the U.S. and potentially in other countries, such as Japan. It is important to note that the impact of this decline varies for each variable. For example, many more people visit National Parks per year than finish the Appalachian Trail. The authors found that the most popular nature-based recreation activity in the U.S. is camping, followed by fishing and hunting, all of which show a declining trend. Pergams and Zaradic found only one countertrend to nature use decline: a slight increase in hiking and backpacking. While the cause(s) for this over-arching decline requires further investigation, this study demonstrates a fundamental shift away from visits to natural areas, with potentially important implications for health, well-being, and conservation. Author Affiliation: Oliver Pergams is with Olive-Harvey College and the University of Illinois at Chicago in Chicago. Country where research took place: United States. C&NN Research Volume 3 Pergams, O. R. W., & Zaradic, P. A. (2008). Evidence for a fundamental and pervasive shift away from nature-based recreation. Proceedings of the National Academy of Sciences of the United States of America, 105(7), 2295-2300. This study is available online at: http://www.videophilia.org/uploads/PNAScomplete.pdf
Many children and adolescents are vitamin D deficient Worldwide, there is a high prevalence of vitamin D deficiency among infants, children, and adolescents. Vitamin D deficiency is a risk factor for rickets and may be a risk factor for development of a number of chronic diseases, such as cardiovascular diseases and cancer. In this paper, S.Y. Huh and C.M. Gordon review the sources of vitamin D, which includes endogenous synthesis (the first step of which is the absorption of ultraviolet B radiation), how vitamin D deficiency is defined and measured, and the prevalence of and risk factors for vitamin D deficiency, which includes reduced sun exposure. In addition, the authors review the health effects of vitamin D deficiency and its prevention and treatment. Huh and Gorden stress the importance of additional research to determine the optimum concentration of vitamin D for children of different ages and to compare different regimens designed to prevent and treat
Š 2012 Children & Nature Network www.childrenandnature.org
10