The use of parks and protected areas by visitors creates concern about appropriate levels of use because there are limits that define how much pressure from outside forces an ecosystem can endure before it experiences degradation, and there are thresholds that define visitor experiences. When researchers, park authorities, and policy makers are trying to determine appropriate usage levels of specific areas, they frequently rely on the rationale of carrying capacity, including social carrying capacity, which “focuses on the relationships among users of a park or protected area” (Dearden & Rollins).
Prior to determining the carrying capacity of a specific area, it is important to define carrying capacity. Prior to its use in the study of parks and protected areas, carrying capacity was commonly used in a variety of natural resource disciplines. The term has received broad use in wildlife and range management, where it was generally characterized as the number of animals of a given species that can be sustained in a known habitat (Dasmann 1964). Based on that characterization, carrying capacity has apparent equivalence in the study of parks and protected areas. One of the first uses of the term carry capacity, in relation to parks and protected areas, occurred in a 1935 report that asked, “How large a crowd can be turned loose in a wilderness without destroying its essential qualities?” (Sumner 1935). The answer in that report was that recreational use of wilderness should be kept “within the carrying capacity.” However, the first detailed use of carrying capacity in the management of parks and protected areas did not occur until the 1960s.
At first, the focus was placed on the relationship between visitor use and environmental conditions. The hypothesis was that increased visitor use causes greater environmental impact, as measured by an array of variables, including destruction of vegetation and soil compaction. One of the first
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