Assessment of the restoration of a degraded semi-humid evergreen broadleaf forest ecosystem by combined single-indicator and comprehensive model method |
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| Authors: | Zhenhong Wang Chuanqun Daun Li Yuan Jing Rao Zizong Zhou Ju Li Chengbo Yang Wanying Xu |
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| Institution: | 1. College of Life Science, Guizhou University, Guiyang City 550025, China;2. State Key Laboratory of Soil Erosion and Dry-land Farming on Loess Plateau, Yangling 712100, China;3. College of Life Science, Yunnan University, Kunming City 650091, China;1. Department of Chemical Engineering, University of Patras, 26500 Patras, Greece;2. FORTH/ICE-HT, P.O. Box 1414, 26504 Patras, Greece;1. Department of Information Systems and Computing, Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom;2. Department of Mathematics, Southeast University, Nanjing 210096, China;3. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350002, China;4. School of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing 210094, China;2. INRA, UMR 1347 Agroecology, Dijon, France;3. INRA, Plateforme GenoSol, UMR 1347 Agroecology, Dijon, France;1. School of Pharmaceutical Sciences, Binzhou Medical University, Yantai, Shandong 264003, PR China;2. Department of Hepatobiliary Surgery, Yantai Yuhuangding Hospital, Yantai, Shandong 264000, PR China;1. School of Resources and Environmental Sciences, Wuhan University, Wuhan 430079, China;2. Laboratory of Critical Zone Evolution, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | We conducted a long-term restoration experiment in the degraded ecosystems of a semi-humid evergreen broadleaf forest in Muding County, Yunan Province, China. We used single-indicator assessment and our newly established comprehensive assessment model to compare the effects of four types of management (different historical disturbances + restoration measures) on forest restoration based on a vegetation survey. (1) Species richness in each of the four restoring communities was still lower than that of the zonal forest. There was a compensatory effect of species richness among different layers within communities. Restoration management by natural succession was clearly efficient at restoring species richness and composition, but the effect of disturbance history was minor. Human-assisted restoration had a great effect on biomass accumulation and model tree growth. Plant density was also affected by the different management types, which progressively led to differences in model tree growth and biomass accumulation. (2) The comprehensive assessment model, a simple method based on the restoration mechanism, can precisely quantify the overall restoration of ecosystems, historical disturbance and actual disturbance, using only one set of data. Restoration index (Rd), turning-point restoration index (R0), restoration-effect index (Ra), turning-point disturbance index (D0), actual disturbance index (Dr) and overcoming disturbance index (Da) presented gradual changes in the four restoring communities. The combined single-indicator and comprehensive model method fully assessed the restoration of degraded ecosystems in a semi-humid evergreen broadleaf forest. |
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