贵州砂石矿区废弃地不同竹种配置模式林下草本群落多样性OA

This study takes Jinghe gravel mining site of Jiangkou county,Guizhou province as the study area to evaluate the effects of different bamboo species configuration patterns on the structure and species diversity of understory herbaceous communities in abandoned gravel mining areas.Nine types of bamboo forests with different species combinations are selected,and quadrat sampling is used to investigate the species composition and diversity characteristics.Margalef richness index,Simpson diversity index,Shannon diversity index,and Pielou evenness index are applied for a comprehensive assessment of community diversity.The results show that a total of 50 herbaceous species are recorded in the study area,belonging to 45 genera in 21 families,and Asteraceae,Poaceae,and Fabaceae are the dominant families.Eleven dominant species are identified,including Artemisia indica,Imperata cylindrica,Stellaria media,Pueraria lobata,and Justicia procumbens,all of which exhibit strong tolerance to poor soil conditions and high environmental adaptability.Significant differences(P<0.05)are observed among different bamboo species configuration patterns in terms of Simpson diversity index,Shannon diversity index,and Pielou evenness index,whereas no significant difference is found in the Margalef richness index.The understory herbaceous community of the pure Chimonobambusa angustifolia stand is the highest in species richness and overall diversity level.This study would provide a theoretical basis and technical reference for the scientific configuration and application of bamboo in the ecological restoration of abandoned gravel mining areas.