Anza Borrego Desert State Park - California State Parks - State of ...

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Final Report – October 2001 The question asked in the Coyote Canyon survey is as follows: One of the issues in managing Anza-Borrego Desert State Park is to balance recreational use with the loss of vegetation. The computer-generated photographs simulate a range of vegetation loss that can result from recreational use. The managers are interested in your opinion on how vegetation loss affects your experience. To help us assess this, please indicate the acceptability of the conditions represented by each photo. A rating of –4 signifies conditions are very unacceptable; a rating of +4 is very acceptable. In Figure 30 below, the zero line serves as a standard to measure the point at which conditions become unacceptable to the majority of visitors. In the case of Coyote Canyon, this point came between Photos 3 and 4. This can also be seen in the box plot (Figure 31), where the box (50 th percentile) does not cross the zero line until Photo 4. Tables A and B demonstrate this as well; the median acceptability does not drop below 0 until Photo 4, when conditions apparently become unacceptable for most people. Because Coyote Canyon was unique, in that the vegetation loss questions were only used at the one site, we tested for significant differences in the mean acceptability scores between fall and spring samples. For this test, analysis of variance was used (Table 39) to compare between groups (fall, spring) and among the photos (1 through 6). A significant difference would suggest that people in one season ranked a photo much differently than participants in the other season. At a p < .05, there was only a significant statistical difference with Photo 2 in the fall and spring populations, with the fall sample giving the photo a higher acceptability ranking than did the spring sample (Tables 39 and 40). Photos 1 and 2 were judged to be acceptable to a majority of Park visitors. By Photo 3, there was a wide range of reaction to the acceptability of the conditions represented, but the majority still found it acceptable. Beginning with Photo 4, conditions became unacceptable for the majority of visitors participating in the survey. Seventy-five percent (205 of 272) of visitors participating in the survey found conditions unacceptable by Photo 5 (Table 38). This number increased to nearly 80% of visitors (217 of 272) who found conditions unacceptable by Photo 6. The results suggest that a majority of Park visitors are not appreciably affected by the impacts to the vegetation until conditions resemble those depicted in Photo 4. 44
Final Report – October 2001 1 2 3 4 5 6 Panel 1. Photo series representing different levels of vegetation loss due to off-road motor vehicles – Coyote Canyon Table 37. Summary statistics of photo series by season and total – Coyote Canyon CC (fall) Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 N Valid 143 142 140 141 142 142 Missing 29 30 32 31 30 30 Mean 3.27 2.74 1.79 -.26 -1.66 -2.28 Median 4.00 3.00 2.00 .00 -3.00 -4.00 Std Dev 1.46 1.50 1.92 2.49 2.61 2.48 CC (spring) Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 N Valid 132 133 131 132 130 130 Missing 53 52 54 53 55 55 Mean 3.12 2.36 1.68 -.52 -2.09 -2.57 Median 4.00 3.00 2.00 -1.00 -3.00 -4.00 Std Dev 1.60 1.57 1.96 2.39 2.39 2.50 CC (total) Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 N Valid 275 275 271 273 272 272 Missing 82 82 86 84 85 85 Mean 3.20 2.56 1.74 -.38 -1.87 -2.42 Median 4.00 3.00 2.00 -1.00 -3.00 -4.00 Std Dev 1.53 1.54 1.94 2.44 2.51 2.49 45
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