نتایج جستجو برای: based recreational areas

تعداد نتایج: 3228926  

Journal: :Environmental management 2014
Kathryn R Kidd W Michael Aust Carolyn A Copenheaver

Trail-based recreation has increased over recent decades, raising the environmental management issue of soil erosion that originates from unsurfaced, recreational trail systems. Trail-based soil erosion that occurs near stream crossings represents a non-point source of pollution to streams. We modeled soil erosion rates along multiple-use (hiking, mountain biking, and horseback riding) recreati...

2017
Nazzareno Cannella Alejandro Cosa-Linan Mareike Roscher Tatiane T. Takahashi Nils Vogler Björn Wängler Rainer Spanagel

The DSM5-based dimensional diagnostic approach defines substance use disorders on a continuum from recreational drug use to habitual and ultimately addicted behavior. Biomarkers that are indicative of recreational drug use and addicted behavior are lacking. We performed a translational [18F]-fluorodeoxyglucose-positron emission tomography (FDG-PET) study in the multi-dimensional 0/3crit model o...

2006
Steven J. Cooke Andy J. Danylchuk Sascha E. Danylchuk Cory D. Suski Tony L. Goldberg

Marine protected areas (MPAs) have become a common conservation and management tool for reducing exploitation from the commercial and recreational fisheries sectors. However, the recreational fisheries sector has the potential to be compatible with no-take MPAs when catchand-release angling is practiced because, in theory, no fish are actually harvested. This presumes that the effects of catch-...

Rest areas have been built on the freeway to avoid traffic accidents and drowsiness so that road travelers can rest. These supplemental rest areas are very small-sized resting facilities located between the larger regular rest areas, which is a unique design. However, the management of rest areas and their accommodations need to be improved by considering the effective factors involved. In this...

2009
Timothy Hawthorne John Krygier Mei-Po Kwan

As the literature on trail development suggests, recreational trail projects can generate conflicts and controversies, particularly when built on abandoned rail corridors through developed areas. These conflicts are often understood as ‘‘not in my back yard” (NIMBY) reactions, suggesting a spatial proximity to conflict which increases as one draws closer to the proposed trail. This research see...

2017
Bobbie Renfro Nanette E Chadwick

Chronic anthropogenic disturbances on coral reefs in the form of overfishing and pollution can shift benthic community composition away from stony corals and toward macroalgae. The use of reefs for recreational snorkeling and diving potentially can lead to similar ecological impacts if not well-managed, but impacts of snorkeling on benthic organisms are not well understood. We quantified variat...

2016
Jennifer K. Fortin Karyn D. Rode Grant V. Hilderbrand James Wilder Sean Farley Carole Jorgensen Bruce G. Marcot Daniel E Crocker

Increased popularity of recreational activities in natural areas has led to the need to better understand their impacts on wildlife. The majority of research conducted to date has focused on behavioral effects from individual recreations, thus there is a limited understanding of the potential for population-level or cumulative effects. Brown bears (Ursus arctos) are the focus of a growing wildl...

2015
Darienne Lancaster Dana R. Haggarty Natalie C. Ban

International declines in marine biodiversity have lead to the creation of marine protected areas and fishery reserve systems. In Canada, 164 Rockfish Conservation Areas (RCAs) were implemented between 2003 and 2007 and now cover 4847.2 km2 of ocean. These reserves were created in response to widespread concern from fishers and nongovernmental organizations about inshore rockfish (genus Sebaste...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی صنایع 1387

according to webster and wind (1972) and anderson et al (1987), “organizational buying is a complex process and involves many people from different functional areas, multiple goals and potentially conflicting decision criteria. moreover, the customers of today are also more knowledgeable and selective when making their purchasing decisions. since a key to organizational survival is the retentio...

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