Results of Spearman correlations between various types of nature exposure (1st column) and conservation NGO revenues.

*indicates significant at 0.05 level, ** indicates 0.01 level, *** indicates 0.001. Correlations were performed for all possible lag periods in years. For example, results in the 1st row (State Park Visitation) indicate that there was a significant, negative correlation between state park visitation and conservation NGO revenues 4 years later (Spearman's rho = −0.74545, PN = 15 comparisons. As state park visitation increased, NGO revenues decreased 4 years later. Conversely, as time spent backpacking/hiking (taken from the Mediamark series) increased, NGO revenues increased 11 years later. The table illustrates that the effect of public lands visitation (including fishing, shaded areas) had a negative effect on NGO revenues with two distinct time lags, 4–7 years later and 15–17 years later; while backpacking/hiking had a positive effect on NGO revenues 11–12 years later.*代表在0.05显著性水平上具有统计学意义，**代表0.01显著性水平，***代表0.001显著性水平。本研究针对所有可能的年度滞后周期开展了相关分析。例如，第一行（州立公园到访量）的结果显示，州立公园到访量与4年后的保护类非政府组织（Non-Governmental Organization，NGO）收入之间存在显著负相关关系，其斯皮尔曼秩相关系数（Spearman's rho）为−0.74545，共完成15组比较。具体而言，当州立公园到访量增加时，4年后的非政府组织收入会相应下降；反之，从Mediamark系列数据中提取的背包旅行/徒步时长增加时，非政府组织收入会在11年后出现上升。该表格表明，公共土地到访量（涵盖垂钓活动、荫凉休憩区域）对非政府组织收入存在负向影响，且存在两个显著的滞后周期：分别为4~7年和15~17年；而背包旅行/徒步活动则会在11~12年后对非政府组织收入产生正向影响。