The influence of plant diversity on slope stability in a moist evergreen deciduous forest |
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| Authors: | Marie Genet Alexia Stokes Thierry Fourcaud Joanne E Norris |
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| Institution: | 1. Université Bordeaux I, US2B, 33405 Talence Cedex, France;2. INRA, UMR AMAP, TA-A51/PS2, Bld de la Lironde, Montpellier Cedex 5, F-34398, France;3. CIRAD, UMR AMAP, TA-A51/PS2, Bld de la Lironde, Montpellier Cedex 5, F-34398, France;4. Halcrow Group Limited, Cygnet Park, Hampton, Peterborough PE7 8GX, UK;1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore 639798, Singapore;2. Department of Civil Engineering, Indian Institute of Technology Guwahati 781039, Assam, India;1. Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy;2. Institute of Fruit and Grapevine Culture, University of Cattolica Milan, Piacenza, Italy;3. Department of Agricultural and Environmental Sciences, University of Milan, Milan, Italy;4. Bern University of Applied Science, Bern, Switzerland;5. Department of Civil, Environmental, Territorial Engineering and Architecture, University of Parma, Parma, Italy;6. Department of Agricultural Science, University of Bologna, Bologna, Italy;7. Department of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, Italy;1. Technical University of Madrid, Avenida Niceto Alcalá Zamora 6 4D, Getafe, Madrid 28905, Spain;2. School of Engineering and Built Environment, Glasgow Caledonian University, 70 Cowcaddens Rd, G4 0BA Glasgow, Scotland, UK;1. School of Agricultural, Forest, and Food Sciences, Bern University of Applied Science, 3052 Zollikofen, Switzerland;2. WSL Swiss Federal Research Institute, Insubric Ecosystems Research Group, CH-6593 Cadenazzo, Switzerland;3. Department of Earth and Environmental Science, New Mexico Tech, Socorro, NM 87801, USA;1. Department of Agricultural and Environmental Sciences (DiSAA), University of Milan, Via Celoria 2, 20133 Milan, Italy;2. Department of Earth and Environmental Sciences, University of Pavia, Via Ferrata 1, 27100 Pavia, Italy;3. Centre of Applied Studies for the Sustainable Management and Protection of Mountain Areas (Ge.S.Di.Mont), University of Milan, Via Morino 8, Edolo, 25048 Brescia, Italy;1. Department of Agricultural and Environmental Sciences (Di.S.A.A), Università degli Studi di Milano, Italy;2. Department of Agricultural, Forestry and Food Sciences (Di.S.A.F.A), Università degli Studi di Torino, Italy;3. Centre of Applied Studies for the Sustainable Management and Protection of Mountain Areas (Ge.S.Di.Mont), Italy;4. WSL Institute for Snow and Avalanche Research SLF, Switzerland |
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| Abstract: | The influence of plant diversity on slope stability was investigated at early phases of succession in a mixed forest in Sichuan, China. The first phase comprised big node bamboo (Phyllostachys nidularia Munro) only. In the second phase, bamboo co-existed with deciduous tree species and in the third phase, deciduous species existed alone. Root density at different depths and root tensile strength were determined for each species. The factor of safety (FOS) was calculated for slopes with and without vegetation for each succession phase. For phase 2, FOS was determined for different species mixtures and positions. In phase 3, simulations were performed with a single tree at the top, middle or toe of the slope. Due to its shallow root system, bamboo contributed little to slope stability. In simulations with the tree at the top or middle of the slope, FOS decreased because tree weight added a surcharge to the slope. FOS increased with the tree at the bottom of the slope. Different mixtures of species along the slope had no influence on FOS. Differences in root tensile strength between species played a small role in FOS calculations, and tree size and density were the most important factors affecting slope stability, excluding hydrological factors. |
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