Plant community composition and interspecific relationships among dominant species on a post-seismic landslide in Hongchun Gully, China Plant community composition and interspecific relationships among dominant species on a post-seismic landslide in Hongchun Gully, China

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Vol14 No.10: 1985-1994

Title】Plant community composition and interspecific relationships among dominant species on a post-seismic landslide in Hongchun Gully, China

Author】HUANG You-you1, 2; HAN Han2; TANG Chuan1*; LIU Shou-jiang3

Addresses】1 State Key Laboratory of Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; 2 Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637009, China; 3 Land and Resources College, China West Normal University, Nanchong 637009, China

Corresponding author】tangc707@gmail.com

Citation】Huang YY, Han H, Tang C, Liu SJ (2017)Plant community composition and interspecific relationships among dominant species on a post-seismic landslide in Hongchun Gully, China. Journal of Mountain Science 14(10). https://doi.org/10.1007/s11629-017-4382-3

DOI】https://doi.org/10.1007/s11629-017-4382-3

Abstract】The 5.12 Earthquake in 2008 and 8.14 Debris Flow in 2010resulted in large-scale landslides that disturbed vast areas of vegetation in the Hongchun Gully, Wenchuan County, China. To define the specific characteristics of vegetation restoration during natural recovery after catastrophic events, vegetation species composition and interspecific associations were investigated on this typical landslide. Field survey data selected from a total of 51 sample plots belonged to seven belt transects and were analysed by Schluter's variance ratio, pearson's chi-squared test, Spearman's correlation coefficients and ecological species groups. Plant communities on the landslide consisted of 78 species, 65 genera and 52 families. Of the total of 78 species, 25 areidentified as dominant species, among which Camptotheca acuminate, Toxicodendron vernicifluum, Coriaria nepalensis, Robinia pseudoacacia, Buddleja alternifolia, Anemone vitifolia andNephrolepis auriculata play a constructive roleduring the natural afforestation. Moreover, according to environmental and ecological factors, these 25 dominant species could be divided into four ecological species groups. This study found that even though the landslide had frequently suffered from interference due to heavy rain, the vegetation succession processes are ongoing, and it is now at a shrub–herb community succession stage, which indicates that vegetation can naturally recover in the denuded sites. This study provides a useful insight into the ecological interactions and interdependence between plant species during the natural recovery of vegetation and provides valuable information on vegetation recovery modelling in the landslide area.

Keywords】Ecological rehabilitation; Plant communities; Vegetation recovery; Geological hazard; Hongchun Gully