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ŠUMARSKI LIST 9-10/2018 str. 84     <-- 84 -->        PDF

and soil enzyme activity implies that the latter can be an indicator for evaluating the effectiveness of soil carbon and nitrogen turnover. The soil ecological environment is a complete system in which the factors directly affect each other. Thus, each factor that is changed by tourism activity would in turn impact the entire ecological environment.
CONCLUSIONS
ZAKLJUČCI
This research reveals that tourism disturbance significantly reduces the soil carbon–nitrogen effectiveness and soil enzyme activities of a subtropical urban park. Consequently, the matter cycle and transformation intensity in the soil are also affected. Furthermore, plant growth is restricted, which significantly impacts the ecological system (Wen et al., 2016). As a result of this study, several suggestions are proposed. Firstly, some warning signs should be placed in vegetation areas that are home to large-scale human activities to remind visitors not to trample upon and destroy the trees and flowers. Secondly, the soil in areas disturbed by tourism should be turned up frequently, and the addition of fertilizers is necessary. Thirdly, in damaged areas, fast-growing trees and shrubs should be planted. Lastly, ecological engineering needs to be strengthened to promote an ecologically-conscious tourism industry.
ACKNOWLEDGMENTS
ZAHVALE
This research was supported by the foundation of Sichuan Educational Committee (18ZB0400), the technology support program of Deyang city (2017ZZ043), the foundation of Sichuan College of Architectural Technology (SCJY/RC–KY–07). The author greatly appreciates two anonymous reviewers for their constructive comments and suggestions on an earlier version of the manuscript. The author is very much obliged to Mrs. Ljerka Vajagić for translation of English to Croatian.
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