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| Vegetation recovery in the landslide-tackling area of Wenchuan earthquake |
| Sun Liwen1,2, Shi Changqing1,2, Zhao Tingning1,2, Li Danxiong1,2, Lai Wenhao1,2, Ding Wanquan1,2 |
| 1. School of Soil and Water Conservation, Beijing Forest University, 100083, Beijing, China; 2. Key Laboratory of Soil and Water Conservation & Desertification Combating, Ministry of Education,100083, Beijing, China |
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Abstract Hanwang town of Mianzhu city in Sichuan Province was selected as the study site to investigate the vegetation recovery in the landslide-tackling area of Wenchuan earthquake. Margalef richness index,Pielou evenness index, Simpson index, Shannon-Wiener diversity index, understory vegetation biomass and other eight indicators were used to evaluate differentiation of vegetation recovery in differentgovernance patterns. To assess the effect of vegetation restoration, principal components analysis method was adopted for the calculation of the comprehensive score of each governance pattern. The results showed that: 1) the mainly vegetation of governance model area was herb, the species of governance pattern were more similar to natural recovery grassland and higher similarity indexes of species were found between different governance areas as well. 2) In the early stages of revegetation, the main component of biomass of understory vegetation was herbaceous layer, and more understory vegetation biomass indicated stronger productivity of forests. 3) According to principal component analysis and cluster analysis, different governance models were divided into three categories, undamaged forest with more stable plant communities obtained the highest score. Grassland of natural recovery sand bags ladder + Alnus cremastogyne + Salix hylonoma and bamboo fencing + Rhus punjabensis had the same effect of vegetation recovery, and the rest could be classified as the same type. In conclusion, artificial control of vegetation landslide body plays a positive role in promoting recovery.
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Received: 15 December 2014
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