亚热带人工混交林演替早期群落结构及其恢复特征

he resilience of community structure is important to the success of mixed plantationconstruction. This study was conducted in the subtropical mixed plantations formed after therenovation of pure forest of Cunninghamia lanceolata in 2010 in Yunyong Forest Farm, Foshan,Guangdong Province. To understand the restoration process of community structure andecological function of subtropical mixed plantations, species diversity, importance value, diameterclass structure and basal area at the breast height were calculated based on the 7.92 hm2 plot whichwas set up in 2020. The results were as follows: (1) 136 woody plant species belonging to 101genera and 47 families colonized the community after 10 years of natural restoration, including 78rare species, indicating the subtropical mixed plantations had a strong conservation ability of species diversity. (2) The average diameter at breast height (DBH) of all individuals was 8.47 cm,and the DBH distribution showed an inverse-J shape. In addition, early artificially introducedspecies could achieve natural regeneration, although their DBH shapes showed bell curves due tothe short recovery time. (3) There was a significant positive correlation between speciesabundance and basal area at the breast height, while other species diversity indices showedsignificant negative correlations with basal area at the breast height, indicating the basal area at thebreast height was still determined by the artificially introduced species in the early succession ofmixed plantations. With the increasing of niche complementarity among coexisting species, it isexpected to promote the simultaneous improvement of species diversity and communityproductivity in the succession of mixed plantations. The results reveal the subtropical mixedplantations have strong conservation ability of community structure. These findings provide atheoretical basis for the management of subtropical mixed plantations.