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Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The threshold effect of the change of canopy and shrub & grass cover during vegetation restoration often determines the success or failure of ecological restoration. If this effect is ignored, other ecological problems may arise. In order to further promote the restoration of forest ecosystems in China and fill in the relevant research gaps, we study the dynamic characteristics of vegetation coverage of tree layer and shrub & grass layer under natural and artificial restoration patterns in typical red soil regions. Based on the advanced ecological threshold assessment framework, we evaluated the threshold effects between the two coverage indicators for different recovery modes through the linear model and three threshold models (including piecewise regression models, step function models, and general models). The results show that, according to the form of posterior distribution of the ecological threshold, there is a threshold effect between the canopy cover and shrub & grass cover under artificial restoration, but it does not exist in the natural recovery mode. Compared with the accuracy of the evaluation results of each model, the results of the hockey stick (HS) model are more accurate. Using the HS model, the threshold of canopy cover in the current artificial restoration plot is 42.85% (95% confidence interval is 41.57%-44.13%), and the shrub & grass cover is 58.75%. If the threshold is crossed, the coverage of the shrub & grass will begin to decrease. Our results can provide an important scientific basis for the structural improvement of plantation ecosystem in red soil region of China. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Clinical Hepatology / Linchuang Gandanbing Zazhi is the property of Journal of Clinical Hepatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)